"""
Clean Document Manager - Simplified version with only clean editor support
"""
import json
import re
from pathlib import Path
from typing import Dict, Any, Optional


class CleanDocumentManager:
    """
    Simplified document manager that only supports the clean editor implementation.
    All legacy code has been removed for clarity and maintainability.
    """

    def __init__(self, db_manager=None):
        self.db_manager = db_manager

    def store_document(self, file_path: str, content: str, ast: list = None, front_matter: dict = None):
        """Store a document in the database."""
        if self.db_manager:
            from pathlib import Path
            filename = Path(file_path).name
            return self.db_manager.store_markdown_file(filename, content)

    def get_file(self, file_path: str) -> Dict[str, Any]:
        """
        Retrieve a markdown file from the database.

        Args:
            file_path: Path to the markdown file to retrieve

        Returns:
            Dictionary containing file content and metadata

        Raises:
            FileNotFoundError: If file is not found in database
        """
        if not self.db_manager:
            raise ValueError("Database manager not initialized")

        # Get file from database
        file_data = self.db_manager.get_markdown_file(file_path)

        if file_data is None:
            raise FileNotFoundError(f"File '{file_path}' not found in database")

        return {
            'content': file_data.get('content', ''),
            'metadata': {
                'filename': file_data.get('filename', file_path),
                'front_matter': file_data.get('front_matter'),
                'size': len(file_data.get('content', '')),
                'modified': file_data.get('modified')
            }
        }

    def render_file(self, input_file: str, output_file: str, template: str = None, css: str = None,
                   edit_mode: bool = False, insert_mode: bool = False, editor_theme: str = 'github', keyboard_shortcuts: bool = True, nodogtag: bool = False) -> Dict[str, Any]:
        """
        Render a markdown file to HTML with optional clean editing capabilities.
        """
        input_path = Path(input_file)
        output_path = Path(output_file)

        if not input_path.exists():
            raise FileNotFoundError(f"Input file not found: {input_file}")

        # Read markdown content
        markdown_content = input_path.read_text(encoding='utf-8')

        # Extract title from markdown (first h1 heading)
        title = self._extract_title_from_markdown(markdown_content)

        # Get original filename without extension
        original_filename = input_path.stem

        # Get version information
        version_info = self._get_version_info()

        # Generate HTML content
        html_content = self._generate_html_template(
            markdown_content=markdown_content,
            title=title,
            css=css,
            template=template,
            edit_mode=edit_mode,
            insert_mode=insert_mode,
            editor_theme=editor_theme,
            keyboard_shortcuts=keyboard_shortcuts,
            original_filename=original_filename,
            version_info=version_info,
            nodogtag=nodogtag
        )

        # Write HTML file
        output_path.parent.mkdir(parents=True, exist_ok=True)
        output_path.write_text(html_content, encoding='utf-8')

        return {
            'success': True,
            'input_file': str(input_path),
            'output_file': str(output_path),
            'edit_mode': edit_mode,
            'editor_theme': editor_theme
        }

    def _extract_title_from_markdown(self, markdown_content: str) -> str:
        """Extract title from first h1 heading in markdown."""
        match = re.search(r'^#\s+(.+)', markdown_content, re.MULTILINE)
        if match:
            return match.group(1).strip()
        return "Markdown Document"

    def _get_version_info(self) -> dict:
        """Get repository name and version information."""
        from .__version__ import get_version_info

        version_info = get_version_info()

        # Transform to the format expected by the editor
        return {
            'repo_name': 'Markitect',
            'version': version_info['full_version'],
            'git_info': ''  # Already included in full_version
        }

    def _get_template_css(self, template: str = None) -> str:
        """Generate layered theme CSS styles."""
        # Import layered theme functions
        from markitect.plugins.builtin.markdown_commands import (
            parse_theme_string, combine_theme_properties, TEMPLATE_STYLES
        )

        # Handle layered themes or fall back to legacy
        if template and ',' in template:
            # New layered theme system
            theme_list = parse_theme_string(template)
            combined_props = combine_theme_properties(theme_list)
            return self._generate_layered_css(combined_props)
        else:
            # Legacy single theme or fallback
            if not template or template not in TEMPLATE_STYLES:
                # Use default layered themes or the specified theme
                theme_list = parse_theme_string(template or 'basic')
                combined_props = combine_theme_properties(theme_list)
                return self._generate_layered_css(combined_props)
            else:
                # Legacy theme - convert to layered
                theme_list = parse_theme_string(template)
                combined_props = combine_theme_properties(theme_list)
                return self._generate_layered_css(combined_props)

    def _generate_layered_css(self, properties: dict) -> str:
        """Generate CSS from combined theme properties."""

        # Set defaults for missing properties (properties override defaults)
        defaults = {
            'body_background': '#ffffff',
            'body_color': '#333333',
            'font_family': '-apple-system, BlinkMacSystemFont, Segoe UI, Helvetica, Arial, sans-serif',
            'max_width': '800px',
            'heading_color': '#333333',  # Use same as body color by default
            'heading_style': 'simple',
            'text_align': 'left',
            'code_background': '#f6f8fa',
            'code_color': '#333333',
            'border_color': '#d0d7de',
            'blockquote_border': '#dfe2e5',
            'blockquote_color': '#6a737d',
            'table_border': '#d0d7de',
            'table_header_bg': '#f6f8fa',
            'accent_color': None,
            'secondary_color': None
        }

        # Merge defaults first, then override with theme properties
        props = {**defaults, **properties}

        # Base CSS
        base_css = f"""
            body {{
                font-family: {props['font_family']};
                max-width: {props['max_width']};
                margin: 0 auto;
                padding: 2rem;
                line-height: 1.6;
                color: {props['body_color']};
                background-color: {props['body_background']};
            }}
            #markdown-content {{
                min-height: 200px;
            }}"""

        # Heading styles
        heading_css = ""
        if props['heading_style'] == 'underlined':
            heading_css = f"""
            h1, h2, h3, h4, h5, h6 {{
                color: {props['heading_color']};
                border-bottom: 1px solid {props['border_color']};
                padding-bottom: 0.3em;
            }}"""
        elif props['heading_style'] == 'centered':
            heading_css = f"""
            h1, h2, h3, h4, h5, h6 {{
                color: {props['heading_color']};
                margin-top: 2rem;
                margin-bottom: 1rem;
            }}
            h1 {{
                text-align: center;
                font-size: 2.2em;
                border-bottom: 2px solid {props['heading_color']};
                padding-bottom: 0.5rem;
            }}"""
        else:  # simple
            heading_css = f"""
            h1, h2, h3, h4, h5, h6 {{
                color: {props['heading_color']};
            }}"""

        # Text alignment
        text_css = ""
        if props['text_align'] == 'justify':
            text_css = """
            p {
                text-align: justify;
                margin-bottom: 1.2rem;
            }"""

        # Element styling
        element_css = f"""
            pre {{
                background-color: {props['code_background']};
                color: {props['code_color']};
                padding: 1rem;
                border-radius: 6px;
                overflow-x: auto;
                border: 1px solid {props['border_color']};
            }}
            code {{
                background-color: {props['code_background']};
                color: {props['code_color']};
                padding: 0.2em 0.4em;
                border-radius: 3px;
                font-size: 0.9em;
            }}
            pre code {{
                background: none;
                padding: 0;
            }}
            blockquote {{
                border-left: 4px solid {props['blockquote_border']};
                margin: 0;
                padding-left: 1rem;
                color: {props['blockquote_color']};
            }}
            table {{
                font-size: 0.85em;
                border-collapse: collapse;
                margin: 1rem 0;
                width: 100%;
                border: 1px solid {props['table_border']};
            }}
            th, td {{
                font-size: inherit;
                border: 1px solid {props['table_border']};
                padding: 0.5rem;
                text-align: left;
            }}
            th {{
                background-color: {props['table_header_bg']};
                font-weight: 600;
            }}"""

        # Link styling
        link_css = ""
        if props.get('link_color'):
            link_css = f"""
            a {{
                color: {props['link_color']};
                text-decoration: underline;
            }}"""
            if props.get('link_hover_color'):
                link_css += f"""
            a:hover {{
                color: {props['link_hover_color']};
            }}"""
            else:
                link_css += """
            a:hover {
                opacity: 0.8;
            }"""

        # Branding accents (if specified and no link_color already set)
        accent_css = ""
        if props.get('accent_color') and not props.get('link_color'):
            accent_css = f"""
            a {{
                color: {props['accent_color']};
            }}
            a:hover {{
                opacity: 0.8;
            }}"""

        # UI theme styling for editor interface elements
        ui_css = ""
        if props.get('editor_panel_bg'):
            ui_css = f"""
            .markitect-edit-mode .ui-edit-floater-panel {{
                background: {props['editor_panel_bg']};
                border: 1px solid {props.get('editor_panel_border', '#dee2e6')};
                box-shadow: 0 4px 12px {props.get('editor_shadow', 'rgba(0,0,0,0.1)')};
                color: {props.get('editor_text_color', '#212529')};
            }}
            .markitect-edit-mode .ui-edit-floater-header {{
                color: {props.get('editor_text_color', '#212529')};
            }}
            .markitect-edit-mode .ui-edit-floater-header h3 {{
                color: {props.get('editor_text_color', '#212529')};
            }}
            .markitect-edit-mode .ui-edit-inline-panel {{
                background: {props['editor_panel_bg']};
                border: 1px solid {props.get('editor_panel_border', '#dee2e6')};
                box-shadow: 0 2px 8px {props.get('editor_shadow', 'rgba(0,0,0,0.1)')};
                color: {props.get('editor_text_color', '#212529')};
                border-radius: 8px;
                padding: 12px;
                margin: 8px 0;
            }}
            .markitect-edit-mode .ui-edit-button {{
                background: {props.get('editor_button_bg', '#ffffff')};
                color: {props.get('editor_text_color', '#212529')};
                border: 1px solid {props.get('editor_panel_border', '#dee2e6')};
                padding: 8px 12px;
                border-radius: 4px;
                cursor: pointer;
                font-size: 12px;
                min-width: 70px;
                font-weight: 500;
                transition: all 0.2s;
            }}
            .markitect-edit-mode .ui-edit-button:hover {{
                background: {props.get('editor_button_hover', '#e9ecef')};
            }}
            .markitect-edit-mode .ui-edit-button:active,
            .markitect-edit-mode .ui-edit-button.active {{
                background: {props.get('editor_button_active', '#dee2e6')};
            }}
            .markitect-edit-mode .ui-edit-button-accept {{
                background: {props.get('editor_accept_bg', '#4caf50')};
                color: white;
            }}
            .markitect-edit-mode .ui-edit-button-accept:hover {{
                background: {props.get('editor_accept_hover', '#388e3c')};
            }}
            .markitect-edit-mode .ui-edit-button-cancel {{
                background: {props.get('editor_cancel_bg', '#f44336')};
                color: white;
            }}
            .markitect-edit-mode .ui-edit-button-cancel:hover {{
                background: {props.get('editor_cancel_hover', '#d32f2f')};
            }}
            .markitect-edit-mode .ui-edit-button-reset {{
                background: {props.get('editor_reset_bg', '#ff9800')};
                color: white;
            }}
            .markitect-edit-mode .ui-edit-button-reset:hover {{
                background: {props.get('editor_reset_hover', '#f57c00')};
            }}
            .markitect-edit-mode .ui-edit-button-secondary {{
                background: {props.get('editor_secondary_bg', '#6c757d')};
                color: white;
            }}
            .markitect-edit-mode .ui-edit-button-secondary:hover {{
                background: {props.get('editor_secondary_hover', '#545b62')};
            }}
            .markitect-edit-mode .ui-edit-section-frame {{
                border: 2px solid {props.get('editor_focus_color', props.get('editor_panel_border', '#dee2e6'))};
                box-shadow: 0 0 0 3px {props.get('editor_focus_color', props.get('editor_panel_border', '#dee2e6'))}33;
            }}
            .markitect-edit-mode .ui-edit-textarea {{
                border: 1px solid {props.get('editor_panel_border', '#dee2e6')};
                color: {props.get('editor_text_color', '#212529')};
                background: {props.get('editor_button_bg', '#ffffff')};
            }}
            .markitect-edit-mode .ui-edit-textarea:focus {{
                border-color: {props.get('editor_focus_color', props.get('editor_panel_border', '#dee2e6'))};
                box-shadow: 0 0 0 2px {props.get('editor_focus_color', props.get('editor_panel_border', '#dee2e6'))}33;
            }}
            .markitect-edit-mode .ui-edit-modal-overlay {{
                position: fixed;
                top: 0;
                left: 0;
                width: 100%;
                height: 100%;
                background: rgba(0, 0, 0, 0.5);
                z-index: 999;
                display: flex;
                align-items: center;
                justify-content: center;
                opacity: 0;
                visibility: hidden;
                transition: opacity 0.3s, visibility 0.3s;
            }}
            .markitect-edit-mode .ui-edit-modal-overlay.active {{
                opacity: 1;
                visibility: visible;
            }}
            .markitect-edit-mode .ui-edit-modal {{
                background: {props['editor_panel_bg']};
                border: 1px solid {props.get('editor_panel_border', '#dee2e6')};
                box-shadow: 0 8px 32px {props.get('editor_shadow', 'rgba(0,0,0,0.2)')};
                color: {props.get('editor_text_color', '#212529')};
                border-radius: 8px;
                max-width: 600px;
                max-height: 80vh;
                width: 90%;
                overflow: hidden;
                transform: scale(0.9) translateY(-20px);
                transition: transform 0.3s;
            }}
            .markitect-edit-mode .ui-edit-modal-overlay.active .ui-edit-modal {{
                transform: scale(1) translateY(0);
            }}
            .markitect-edit-mode .ui-edit-modal-header {{
                padding: 20px 24px 16px;
                border-bottom: 1px solid {props.get('editor_panel_border', '#dee2e6')};
                display: flex;
                justify-content: space-between;
                align-items: center;
            }}
            .markitect-edit-mode .ui-edit-modal-title {{
                margin: 0;
                font-size: 18px;
                font-weight: 600;
                color: {props.get('editor_text_color', '#212529')};
            }}
            .markitect-edit-mode .ui-edit-modal-close {{
                background: none;
                border: none;
                font-size: 24px;
                cursor: pointer;
                color: {props.get('editor_text_color', '#212529')};
                padding: 4px;
                border-radius: 4px;
                width: 32px;
                height: 32px;
                display: flex;
                align-items: center;
                justify-content: center;
                transition: background-color 0.2s;
            }}
            .markitect-edit-mode .ui-edit-modal-close:hover {{
                background: {props.get('editor_button_hover', '#e9ecef')};
            }}
            .markitect-edit-mode .ui-edit-modal-body {{
                padding: 20px 24px;
                overflow-y: auto;
                max-height: 60vh;
            }}
            .markitect-edit-mode .ui-edit-modal-content {{
                white-space: pre-line;
                line-height: 1.5;
                font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
                font-size: 14px;
            }}
            .markitect-edit-mode .ui-edit-modal-section {{
                margin-bottom: 16px;
            }}
            .markitect-edit-mode .ui-edit-modal-section:last-child {{
                margin-bottom: 0;
            }}
            .markitect-edit-mode .ui-edit-modal-section-title {{
                font-weight: 600;
                margin-bottom: 8px;
                color: {props.get('editor_text_color', '#212529')};
            }}
            .markitect-edit-mode .ui-edit-modal-footer {{
                padding: 16px 24px 20px;
                border-top: 1px solid {props.get('editor_panel_border', '#dee2e6')};
                text-align: right;
            }}

            /* Confirmation Dialog Styles */
            .markitect-edit-mode .ui-edit-confirmation-modal {{
                max-width: 500px;
            }}
            .markitect-edit-mode .ui-edit-confirmation-content {{
                font-size: 16px;
                line-height: 1.5;
                margin-bottom: 24px;
                color: {props.get('editor_text_color', '#212529')};
            }}
            .markitect-edit-mode .ui-edit-confirmation-warning {{
                background: {props.get('editor_warning_bg', '#fff3cd')};
                border: 1px solid {props.get('editor_warning_border', '#ffeaa7')};
                color: {props.get('editor_warning_text', '#856404')};
                padding: 12px 16px;
                border-radius: 6px;
                margin: 16px 0;
                font-size: 14px;
            }}
            .markitect-edit-mode .ui-edit-confirmation-buttons {{
                display: flex;
                gap: 12px;
                justify-content: flex-end;
            }}
            .markitect-edit-mode .ui-edit-button-confirm {{
                background: {props.get('editor_danger_button', '#dc3545')};
                color: white;
                border: none;
                padding: 10px 20px;
                border-radius: 6px;
                font-size: 14px;
                font-weight: 500;
                cursor: pointer;
                transition: background-color 0.2s, transform 0.1s;
            }}
            .markitect-edit-mode .ui-edit-button-confirm:hover {{
                background: {props.get('editor_danger_button_hover', '#c82333')};
                transform: translateY(-1px);
            }}
            .markitect-edit-mode .ui-edit-button-confirm:active {{
                transform: translateY(0);
            }}
            .markitect-edit-mode .ui-edit-button-confirm:focus {{
                outline: 2px solid {props.get('editor_focus_color', '#007bff')};
                outline-offset: 2px;
            }}
            .markitect-edit-mode .ui-edit-button-cancel {{
                background: {props.get('editor_secondary_button', '#6c757d')};
                color: white;
                border: none;
                padding: 10px 20px;
                border-radius: 6px;
                font-size: 14px;
                font-weight: 500;
                cursor: pointer;
                transition: background-color 0.2s, transform 0.1s;
            }}
            .markitect-edit-mode .ui-edit-button-cancel:hover {{
                background: {props.get('editor_secondary_button_hover', '#545b62')};
                transform: translateY(-1px);
            }}
            .markitect-edit-mode .ui-edit-button-cancel:active {{
                transform: translateY(0);
            }}
            .markitect-edit-mode .ui-edit-button-cancel:focus {{
                outline: 2px solid {props.get('editor_focus_color', '#007bff')};
                outline-offset: 2px;
            }}

            /* Document Scroll Indicators */
            .ui-scroll-indicator {{
                position: fixed;
                left: 50%;
                transform: translateX(-50%);
                width: 60px;
                height: 30px;
                background: {props.get('editor_panel_bg', '#f8f9fa')};
                border: 1px solid {props.get('editor_panel_border', '#dee2e6')};
                border-radius: 15px;
                display: flex;
                align-items: center;
                justify-content: center;
                cursor: pointer;
                opacity: 0;
                visibility: hidden;
                transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.2s ease, background-color 0.2s ease;
                z-index: 1000;
                box-shadow: 0 4px 12px {props.get('editor_shadow', 'rgba(0,0,0,0.15)')};
            }}
            .ui-scroll-indicator:hover {{
                transform: translateX(-50%) scale(1.05);
            }}
            .ui-scroll-indicator:not(.disabled):hover {{
                background: {props.get('editor_button_hover', '#e9ecef')};
            }}
            .ui-scroll-indicator.active {{
                opacity: 0.9;
                visibility: visible;
            }}
            .ui-scroll-indicator.disabled {{
                background: {props.get('editor_button_active', '#dee2e6')};
                cursor: not-allowed;
                opacity: 0.6;
            }}
            .ui-scroll-indicator.disabled:hover {{
                transform: translateX(-50%);
                background: {props.get('editor_button_active', '#dee2e6')};
            }}
            .ui-scroll-indicator-up {{
                top: 20px;
            }}
            .ui-scroll-indicator-down {{
                bottom: 20px;
            }}
            .ui-scroll-indicator::before {{
                content: '';
                width: 0;
                height: 0;
                border-style: solid;
                transition: border-color 0.2s ease;
            }}
            .ui-scroll-indicator-up::before {{
                border-left: 8px solid transparent;
                border-right: 8px solid transparent;
                border-bottom: 12px solid {props.get('editor_text_color', '#212529')};
            }}
            .ui-scroll-indicator-down::before {{
                border-left: 8px solid transparent;
                border-right: 8px solid transparent;
                border-top: 12px solid {props.get('editor_text_color', '#212529')};
            }}
            .ui-scroll-indicator.disabled.ui-scroll-indicator-up::before {{
                border-bottom-color: {props.get('editor_secondary_button', '#6c757d')};
            }}
            .ui-scroll-indicator.disabled.ui-scroll-indicator-down::before {{
                border-top-color: {props.get('editor_secondary_button', '#6c757d')};
            }}

            /* Insert Mode Specific Styles */
            .markitect-insert-mode .ui-edit-floater-panel {{
                background: {props['editor_panel_bg']};
                border: 1px solid {props.get('editor_panel_border', '#dee2e6')};
                box-shadow: 0 4px 12px {props.get('editor_shadow', 'rgba(0,0,0,0.1)')};
                color: {props.get('editor_text_color', '#212529')};
            }}
            .markitect-insert-mode .ui-edit-floater-header {{
                color: {props.get('editor_text_color', '#212529')};
            }}
            .markitect-insert-mode .ui-edit-floater-header h3 {{
                color: {props.get('editor_text_color', '#212529')};
            }}
            .markitect-insert-mode .ui-edit-inline-panel {{
                background: {props['editor_panel_bg']};
                border: 1px solid {props.get('editor_panel_border', '#dee2e6')};
                box-shadow: 0 2px 8px {props.get('editor_shadow', 'rgba(0,0,0,0.1)')};
                color: {props.get('editor_text_color', '#212529')};
                border-radius: 8px;
                padding: 12px;
                margin: 8px 0;
            }}
            .markitect-insert-mode .ui-insert-protected-panel {{
                border-left: 4px solid #ff9800;
            }}
            .markitect-insert-mode .ui-insert-heading-display {{
                font-family: 'SF Mono', Monaco, 'Cascadia Code', monospace;
                font-size: 14px;
                font-weight: bold;
                padding: 8px 12px;
                background: {props.get('editor_warning_bg', '#fff3cd')};
                border: 1px solid {props.get('editor_warning_border', '#ffeaa7')};
                border-radius: 4px;
                border-left: 4px solid #007bff;
                color: {props.get('editor_warning_text', '#856404')};
                margin-bottom: 8px;
            }}
            .markitect-insert-mode .ui-insert-content-editor {{
                border: 1px solid {props.get('editor_panel_border', '#dee2e6')};
                color: {props.get('editor_text_color', '#212529')};
                background: {props.get('editor_button_bg', '#ffffff')};
            }}
            .markitect-insert-mode .ui-insert-content-editor:focus {{
                border-color: {props.get('editor_focus_color', '#007bff')};
                box-shadow: 0 0 0 2px {props.get('editor_focus_color', '#007bff')}33;
            }}
            .markitect-insert-mode .ui-edit-button {{
                background: {props.get('editor_button_bg', '#ffffff')};
                color: {props.get('editor_text_color', '#212529')};
                border: 1px solid {props.get('editor_panel_border', '#dee2e6')};
                padding: 8px 12px;
                border-radius: 4px;
                cursor: pointer;
                font-size: 12px;
                min-width: 70px;
                font-weight: 500;
                transition: all 0.2s;
            }}
            .markitect-insert-mode .ui-edit-button:hover {{
                background: {props.get('editor_button_hover', '#e9ecef')};
            }}
            .markitect-insert-mode .ui-edit-button:active,
            .markitect-insert-mode .ui-edit-button.active {{
                background: {props.get('editor_button_active', '#dee2e6')};
            }}
            .markitect-insert-mode .ui-edit-button-accept {{
                background: #4caf50;
                color: white;
            }}
            .markitect-insert-mode .ui-edit-button-accept:hover {{
                background: #388e3c;
            }}
            .markitect-insert-mode .ui-edit-button-cancel {{
                background: #f44336;
                color: white;
            }}
            .markitect-insert-mode .ui-edit-button-cancel:hover {{
                background: #d32f2f;
            }}
            .markitect-insert-mode .ui-edit-button-reset {{
                background: #ff9800;
                color: white;
            }}
            .markitect-insert-mode .ui-edit-button-reset:hover {{
                background: #f57c00;
            }}
            .markitect-insert-mode .ui-edit-section-frame {{
                border: 2px solid {props.get('editor_focus_color', '#007bff')};
                box-shadow: 0 0 0 3px {props.get('editor_focus_color', '#007bff')}33;
            }}

            /* Modal Overlay and Dialog Styles for Insert Mode */
            .markitect-insert-mode .ui-edit-modal-overlay {{
                position: fixed;
                top: 0;
                left: 0;
                width: 100%;
                height: 100%;
                background: rgba(0, 0, 0, 0.5);
                z-index: 999;
                display: flex;
                align-items: center;
                justify-content: center;
                opacity: 0;
                visibility: hidden;
                transition: opacity 0.3s, visibility 0.3s;
            }}
            .markitect-insert-mode .ui-edit-modal-overlay.active {{
                opacity: 1;
                visibility: visible;
            }}
            .markitect-insert-mode .ui-edit-modal {{
                background: {props['editor_panel_bg']};
                border: 1px solid {props.get('editor_panel_border', '#dee2e6')};
                box-shadow: 0 8px 32px {props.get('editor_shadow', 'rgba(0,0,0,0.2)')};
                color: {props.get('editor_text_color', '#212529')};
                border-radius: 8px;
                max-width: 600px;
                max-height: 80vh;
                width: 90%;
                overflow: hidden;
                transform: scale(0.9) translateY(-20px);
                transition: transform 0.3s;
            }}
            .markitect-insert-mode .ui-edit-modal-overlay.active .ui-edit-modal {{
                transform: scale(1) translateY(0);
            }}
            .markitect-insert-mode .ui-edit-modal-header {{
                padding: 20px 24px 16px;
                border-bottom: 1px solid {props.get('editor_panel_border', '#dee2e6')};
                display: flex;
                justify-content: space-between;
                align-items: center;
            }}
            .markitect-insert-mode .ui-edit-modal-title {{
                margin: 0;
                font-size: 18px;
                font-weight: 600;
                color: {props.get('editor_text_color', '#212529')};
            }}
            .markitect-insert-mode .ui-edit-modal-close {{
                background: transparent;
                border: none;
                font-size: 24px;
                cursor: pointer;
                color: {props.get('editor_text_color', '#212529')};
                padding: 0;
                width: 32px;
                height: 32px;
                display: flex;
                align-items: center;
                justify-content: center;
                border-radius: 4px;
                transition: background-color 0.2s;
            }}
            .markitect-insert-mode .ui-edit-modal-close:hover {{
                background: {props.get('editor_button_hover', '#e9ecef')};
            }}
            .markitect-insert-mode .ui-edit-modal-body {{
                padding: 20px 24px;
                max-height: 400px;
                overflow-y: auto;
                color: {props.get('editor_text_color', '#212529')};
            }}
            .markitect-insert-mode .ui-edit-modal-section {{
                margin-bottom: 8px;
                color: {props.get('editor_text_color', '#212529')};
            }}
            .markitect-insert-mode .ui-edit-modal-footer {{
                padding: 16px 24px 20px;
                border-top: 1px solid {props.get('editor_panel_border', '#dee2e6')};
                text-align: right;
            }}

            /* Confirmation Dialog Styles for Insert Mode */
            .markitect-insert-mode .ui-edit-confirmation-modal {{
                max-width: 500px;
            }}
            .markitect-insert-mode .ui-edit-confirmation-content {{
                font-size: 16px;
                line-height: 1.5;
                margin-bottom: 24px;
                color: {props.get('editor_text_color', '#212529')};
            }}
            .markitect-insert-mode .ui-edit-confirmation-warning {{
                background: {props.get('editor_warning_bg', '#fff3cd')};
                color: {props.get('editor_warning_text', '#856404')};
                border: 1px solid {props.get('editor_warning_border', '#ffeaa7')};
                border-radius: 6px;
                padding: 12px 16px;
                margin: 16px 0;
                font-size: 14px;
                line-height: 1.4;
            }}
            .markitect-insert-mode .ui-edit-confirmation-buttons {{
                display: flex;
                gap: 12px;
                justify-content: flex-end;
                margin-top: 24px;
            }}
            .markitect-insert-mode .ui-edit-button-confirm {{
                background: #dc3545;
                color: white;
                border: 1px solid #dc3545;
                padding: 10px 20px;
                border-radius: 6px;
                font-size: 14px;
                font-weight: 500;
                cursor: pointer;
                transition: all 0.2s;
            }}
            .markitect-insert-mode .ui-edit-button-confirm:hover {{
                background: #c82333;
                border-color: #bd2130;
            }}
            .markitect-insert-mode .ui-edit-button-cancel {{
                background: {props.get('editor_button_bg', '#ffffff')};
                color: {props.get('editor_text_color', '#212529')};
                border: 1px solid {props.get('editor_panel_border', '#dee2e6')};
                padding: 10px 20px;
                border-radius: 6px;
                font-size: 14px;
                font-weight: 500;
                cursor: pointer;
                transition: all 0.2s;
            }}
            .markitect-insert-mode .ui-edit-button-cancel:hover {{
                background: {props.get('editor_button_hover', '#e9ecef')};
            }}
            """

        return f"<style>{base_css}{heading_css}{text_css}{element_css}{link_css}{accent_css}{ui_css}</style>"

    def _get_legacy_template_css(self, template: str) -> str:
        """Legacy CSS generation - kept for backward compatibility."""
        # Import template styles
        from markitect.plugins.builtin.markdown_commands import TEMPLATE_STYLES

        # Use basic as default if no template specified
        if not template or template not in TEMPLATE_STYLES:
            template = 'basic'

        style_config = TEMPLATE_STYLES[template]

        # Base CSS that's common to all templates
        base_css = f"""
            body {{
                font-family: {style_config['font_family']};
                max-width: {style_config['max_width']};
                margin: 0 auto;
                padding: 2rem;
                line-height: 1.6;
                color: {style_config['body_color']};
            }}
            #markdown-content {{
                min-height: 200px;
            }}"""

        # Convert legacy template config to layered format
        legacy_config = TEMPLATE_STYLES[template]
        layered_props = {
            'font_family': legacy_config['font_family'],
            'max_width': legacy_config['max_width'],
            'body_color': legacy_config['body_color'],
        }
        return self._generate_layered_css(layered_props)

    def _generate_html_template(self, markdown_content: str, title: str, css: str = None, template: str = None,
                              edit_mode: bool = False, insert_mode: bool = False, editor_theme: str = 'github', keyboard_shortcuts: bool = True, original_filename: str = 'document', version_info: dict = None, nodogtag: bool = False) -> str:
        """Generate clean HTML template."""

        # Add dogtag to markdown content if not disabled
        if not nodogtag:
            import datetime
            import getpass

            now = datetime.datetime.now()
            datetime_str = now.strftime("%Y-%m-%d %H:%M:%S")
            try:
                username = getpass.getuser()
            except:
                username = "user"

            # Create username link only for 'worsch', otherwise just show username
            if username == 'worsch':
                username_link = f'<a href="https://coulomb.social/open/worsch" target="_blank">{username}</a>'
            else:
                username_link = username

            dogtag = f'\n\n---\n*-- html from markdown by <a href="https://coulomb.social/open/MarkiTect" target="_blank">MarkiTect</a> on {datetime_str} by {username_link}*'
            markdown_content_with_dogtag = markdown_content + dogtag
        else:
            markdown_content_with_dogtag = markdown_content

        # Escape the markdown content for JavaScript
        js_markdown_content = json.dumps(markdown_content_with_dogtag)

        # Handle CSS styles
        css_content = ""
        if css:
            try:
                css_path = Path(css)
                if css_path.exists():
                    css_file_content = css_path.read_text(encoding='utf-8')
                    css_content = f"<style>\n{css_file_content}\n</style>"
                else:
                    css_content = f'<link rel="stylesheet" href="{css}">'
            except Exception:
                css_content = f'<link rel="stylesheet" href="{css}">'

        # Generate template-specific CSS
        default_css = self._get_template_css(template)

        # Load clean editor JavaScript files
        editor_scripts = ""
        editor_config = ""
        body_classes = ""

        if edit_mode:
            body_classes = ' class="markitect-edit-mode"'

            # Configuration for clean editor
            version_str = f"{version_info['repo_name']} v{version_info['version']}{version_info['git_info']}" if version_info else "Markitect v0.5.0.dev"
            editor_config = f"""
        const MARKITECT_EDIT_MODE = true;
        const MARKITECT_EDITOR_CONFIG = {{
            mode: 'edit',
            theme: '{editor_theme}',
            keyboardShortcuts: {str(keyboard_shortcuts).lower()},
            autosave: false,
            sections: true,
            originalFilename: '{original_filename}',
            version: '{version_str}',
            repoName: '{version_info['repo_name'] if version_info else 'Markitect'}'
        }};

        // Make config available globally
        window.editorConfig = MARKITECT_EDITOR_CONFIG;"""
        elif insert_mode:
            body_classes = ' class="markitect-insert-mode"'

            # Configuration for insert mode editor
            version_str = f"{version_info['repo_name']} v{version_info['version']}{version_info['git_info']}" if version_info else "Markitect v0.5.0.dev"
            editor_config = f"""
        const MARKITECT_INSERT_MODE = true;
        const MARKITECT_EDITOR_CONFIG = {{
            mode: 'insert',
            restrictedHeadingLevels: [1, 2, 3],
            theme: '{editor_theme}',
            keyboardShortcuts: {str(keyboard_shortcuts).lower()},
            autosave: false,
            sections: true,
            originalFilename: '{original_filename}',
            version: '{version_str}',
            repoName: '{version_info['repo_name'] if version_info else 'Markitect'}'
        }};

        // Make config available globally
        window.editorConfig = MARKITECT_EDITOR_CONFIG;"""

        # Load clean editor architecture for both edit and insert modes
        if edit_mode or insert_mode:
            editor_scripts = self._get_clean_editor_scripts()

        # Generate the complete HTML template
        html_template = f"""<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>{title}</title>
    {css_content}
    {default_css}

    <script src="https://cdn.jsdelivr.net/npm/marked/marked.min.js"
            onload="window.markitectMarkedLoaded = true"
            onerror="window.markitectMarkedError = true"></script>
</head>
<body{body_classes}>

    <div id="markdown-content"></div>

    <script>
        const markdownContent = {js_markdown_content};
        {editor_config}

        {editor_scripts}

        // Always render content first (graceful degradation)
        document.addEventListener('DOMContentLoaded', function() {{
            console.log("Rendering content...");

            const contentDiv = document.getElementById('markdown-content');

            // Step 1: Ensure content is always displayed
            if (contentDiv) {{
                if (typeof marked !== 'undefined') {{
                    try {{
                        const html = marked.parse(markdownContent);
                        // Add target="_blank" to all links
                        const htmlWithTargetBlank = html.replace(/<a href="([^"]*)"([^>]*)>/g, '<a href="$1" target="_blank"$2>');
                        contentDiv.innerHTML = htmlWithTargetBlank;
                        console.log("✓ Content rendered successfully");
                        console.log('✓ Markdown rendered successfully');
                    }} catch (error) {{
                        contentDiv.innerHTML = '<p>Error rendering markdown: ' + error.message + '</p>';
                        console.error("Content rendered with errors");
                        console.error("Markdown parsing failed:", error.message);
                    }}
                }} else {{
                    // Fallback: display raw markdown with basic formatting
                    const fallbackHtml = markdownContent
                        .replace(/^# (.*$)/gim, '<h1>$1</h1>')
                        .replace(/^## (.*$)/gim, '<h2>$1</h2>')
                        .replace(/^### (.*$)/gim, '<h3>$1</h3>')
                        .replace(/\\*\\*(.*?)\\*\\*/g, '<strong>$1</strong>')
                        .replace(/\\*(.*?)\\*/g, '<em>$1</em>')
                        .replace(/^- (.*$)/gim, '<li>$1</li>')
                        .replace(/\\n\\n/g, '<br><br>')
                        .replace(/\\n/g, '<br>');
                    contentDiv.innerHTML = '<div style="white-space: pre-wrap;">' + fallbackHtml + '</div>';
                    console.warn("Content rendered with fallback parser");
                    console.warn("CDN library failed to load - using basic fallback rendering");
                }}
            }}

            // Step 2: Initialize edit/insert capabilities if enabled
            if ((typeof MARKITECT_EDIT_MODE !== 'undefined' && MARKITECT_EDIT_MODE) ||
                (typeof MARKITECT_INSERT_MODE !== 'undefined' && MARKITECT_INSERT_MODE)) {{
                const mode = (typeof MARKITECT_INSERT_MODE !== 'undefined' && MARKITECT_INSERT_MODE) ? 'insert' : 'edit';
                console.log(`Initializing clean ${{mode}} capabilities...`);
                try {{
                    console.log("Creating clean editor instance...");
                    initializeCleanEditor();
                    if (mode === 'insert') {{
                        console.log("✓ Clean insert mode active - click any section to edit (headings 1-3 protected)");
                    }} else {{
                        console.log("✓ Clean edit mode active - click any section to edit");
                    }}
                }} catch (error) {{
                    console.error(`Clean ${{mode}} mode failed to initialize:`, error);
                }}
            }}

            // Step 3: Initialize document scroll indicators (always available)
            try {{
                initializeScrollIndicators();
            }} catch (error) {{
                console.error("Scroll indicators failed to initialize:", error);
            }}
        }});

        // Handle CDN loading errors
        window.addEventListener('load', function() {{
            if (window.markitectMarkedError) {{
                console.error("CDN library failed to load - network or firewall blocking marked.js");
            }}
        }});
    </script>
</body>
</html>"""

        return html_template

    def _get_clean_editor_scripts(self) -> str:
        """Get the complete clean editor JavaScript code."""
        return """
        // Clean Editor Architecture
        /**
 * Test-Driven Section Editor Implementation
 *
 * A clean, object-oriented approach to handling section editing
 * that can be tested independently of the DOM.
 */

// Enums for clear state management
const EditState = Object.freeze({
    ORIGINAL: 'original',
    EDITING: 'editing',
    MODIFIED: 'modified',
    SAVED: 'saved'
});

const SectionType = Object.freeze({
    HEADING: 'heading',
    PARAGRAPH: 'paragraph',
    LIST: 'list',
    CODE: 'code',
    BLOCKQUOTE: 'blockquote'
});

/**
 * Section class - Core business logic for a single editable section
 */
class Section {
    constructor(id, originalMarkdown, sectionType = SectionType.PARAGRAPH) {
        this.id = id;
        this.originalMarkdown = originalMarkdown;
        this.currentMarkdown = originalMarkdown;
        this.editingMarkdown = null;
        this.pendingMarkdown = null;
        this.sectionType = sectionType;
        this.headingLevel = Section.detectHeadingLevel(originalMarkdown);
        this.state = EditState.ORIGINAL;
        this.domElement = null;
        this.lastSaved = null;
        this.created = new Date();
    }

    startEdit() {
        if (this.state === EditState.EDITING) {
            throw new Error(`Section ${this.id} is already being edited`);
        }
        this.editingMarkdown = this.pendingMarkdown || this.currentMarkdown;
        this.state = EditState.EDITING;
        return this.editingMarkdown;
    }

    updateContent(markdown) {
        if (this.state !== EditState.EDITING) {
            throw new Error(`Section ${this.id} is not in editing state`);
        }
        this.editingMarkdown = markdown;
    }

    acceptChanges() {
        if (this.state !== EditState.EDITING) {
            throw new Error(`Section ${this.id} is not in editing state`);
        }
        this.currentMarkdown = this.editingMarkdown;
        this.editingMarkdown = null;
        this.pendingMarkdown = null;
        this.state = EditState.SAVED;
        this.lastSaved = new Date();
        return this.currentMarkdown;
    }

    cancelChanges() {
        if (this.state !== EditState.EDITING) {
            throw new Error(`Section ${this.id} is not in editing state`);
        }
        this.editingMarkdown = null;
        if (this.pendingMarkdown !== null) {
            this.state = EditState.MODIFIED;
            return this.pendingMarkdown;
        } else if (this.lastSaved !== null) {
            this.state = EditState.SAVED;
            return this.currentMarkdown;
        } else {
            this.state = this.hasChanges() ? EditState.MODIFIED : EditState.ORIGINAL;
            return this.currentMarkdown;
        }
    }

    resetToOriginal() {
        this.currentMarkdown = this.originalMarkdown;
        this.editingMarkdown = null;
        this.pendingMarkdown = null;
        this.lastSaved = null;
        this.state = EditState.ORIGINAL;
        return this.originalMarkdown;
    }

    stopEditing() {
        if (this.state !== EditState.EDITING) {
            return this.state;
        }

        // If we have editing changes that differ from current content, preserve them as pending
        if (this.editingMarkdown && this.editingMarkdown !== this.currentMarkdown) {
            this.pendingMarkdown = this.editingMarkdown;
            this.state = EditState.MODIFIED; // Has pending changes
        } else {
            // No changes made during this edit session
            this.pendingMarkdown = null;
            if (this.lastSaved !== null) {
                this.state = EditState.SAVED;
            } else {
                this.state = this.hasChanges() ? EditState.MODIFIED : EditState.ORIGINAL;
            }
        }

        this.editingMarkdown = null;
        return this.state;
    }

    hasChanges() {
        return this.currentMarkdown !== this.originalMarkdown;
    }

    isEditing() {
        return this.state === EditState.EDITING;
    }

    getStatus() {
        return {
            id: this.id,
            state: this.state,
            hasChanges: this.hasChanges(),
            isEditing: this.isEditing(),
            contentLength: this.currentMarkdown.length,
            lastSaved: this.lastSaved,
            sectionType: this.sectionType
        };
    }

    static generateId(content, position) {
        const str = content.substring(0, 100) + position.toString();
        let hash = 0;
        for (let i = 0; i < str.length; i++) {
            const char = str.charCodeAt(i);
            hash = ((hash << 5) - hash) + char;
            hash = hash & hash;
        }
        return `section_${Math.abs(hash)}_${position}`;
    }

    static detectType(markdown) {
        const trimmed = markdown.trim();
        if (trimmed.startsWith('#')) return SectionType.HEADING;
        if (trimmed.startsWith('```')) return SectionType.CODE;
        if (trimmed.startsWith('>')) return SectionType.BLOCKQUOTE;
        if (trimmed.startsWith('-') || trimmed.startsWith('*') || /^\\d+\\./.test(trimmed)) {
            return SectionType.LIST;
        }
        return SectionType.PARAGRAPH;
    }

    static detectHeadingLevel(markdown) {
        const trimmed = markdown.trim();
        const match = trimmed.match(/^(#{1,6})\s/);
        return match ? match[1].length : null;
    }

    isHeading() {
        return this.sectionType === SectionType.HEADING;
    }

    isProtectedHeading() {
        if (!this.isHeading()) return false;
        // Check if we're in insert mode and if this heading level is protected
        const config = window.editorConfig || {};
        const restrictedLevels = config.restrictedHeadingLevels || [];
        return config.mode === 'insert' && restrictedLevels.includes(this.headingLevel);
    }

    getHeadingText() {
        if (!this.isHeading()) return null;
        // Extract first line for heading text
        const firstLine = this.originalMarkdown.trim().split('\\n')[0];
        const match = firstLine.match(/^(#{1,6})\s+(.+)$/);
        return match ? match[2] : null;
    }

    getHeadingContent() {
        if (!this.isHeading()) return this.currentMarkdown;
        const lines = this.currentMarkdown.split('\\n');
        // Return content after the heading line
        return lines.slice(1).join('\\n');
    }
}

/**
 * SectionManager class - Manages the collection of sections
 */
class SectionManager {
    constructor() {
        this.sections = new Map();
        // Note: Removed single editingSection tracking to allow multiple concurrent edits
        this.listeners = new Map();
    }

    on(event, callback) {
        if (!this.listeners.has(event)) {
            this.listeners.set(event, []);
        }
        this.listeners.get(event).push(callback);
    }

    emit(event, data) {
        if (this.listeners.has(event)) {
            this.listeners.get(event).forEach(callback => callback(data));
        }
    }

    createSectionsFromMarkdown(markdownContent) {
        const lines = markdownContent.split('\\n');
        const sections = [];
        let currentSection = '';
        let position = 0;

        for (let i = 0; i < lines.length; i++) {
            const line = lines[i];
            const isHeading = /^#{1,6}\s/.test(line);
            const isNewParagraph = line.trim() && i > 0 && !lines[i-1].trim();
            const isNewSection = isHeading || isNewParagraph;

            if (isNewSection && currentSection.trim()) {
                const sectionId = Section.generateId(currentSection, position);
                const sectionType = Section.detectType(currentSection);
                const section = new Section(sectionId, currentSection.trim(), sectionType);
                sections.push(section);
                this.sections.set(sectionId, section);
                position++;
                currentSection = line;
            } else {
                if (currentSection) currentSection += '\\n';
                currentSection += line;
            }
        }

        if (currentSection.trim()) {
            const sectionId = Section.generateId(currentSection, position);
            const sectionType = Section.detectType(currentSection);
            const section = new Section(sectionId, currentSection.trim(), sectionType);
            sections.push(section);
            this.sections.set(sectionId, section);
        }

        this.emit('sections-created', { sections, count: sections.length });
        return sections;
    }

    startEditing(sectionId) {
        const section = this.sections.get(sectionId);
        if (!section) {
            throw new Error(`Section ${sectionId} not found`);
        }

        // Check if section is already being edited
        if (section.isEditing()) {
            console.log('Section already in editing state:', sectionId);
            return section.editingMarkdown;
        }

        const content = section.startEdit();
        // Note: No longer tracking single editingSection - allowing multiple
        this.emit('edit-started', { sectionId, content, section: section.getStatus() });
        return content;
    }

    updateContent(sectionId, markdown) {
        const section = this.sections.get(sectionId);
        if (!section) {
            throw new Error(`Section ${sectionId} not found`);
        }
        section.updateContent(markdown);
        this.emit('content-updated', { sectionId, markdown, section: section.getStatus() });
    }

    acceptChanges(sectionId) {
        const section = this.sections.get(sectionId);
        if (!section) {
            throw new Error(`Section ${sectionId} not found`);
        }

        // For protected headings in insert mode, validate that heading hasn't changed
        if (section.isProtectedHeading()) {
            const originalHeadingLine = section.originalMarkdown.split('\\n')[0];
            const newHeadingLine = section.editingMarkdown.split('\\n')[0];
            if (originalHeadingLine !== newHeadingLine) {
                throw new Error(`Cannot modify protected heading in insert mode. Heading level ${section.headingLevel} is read-only.`);
            }
        }

        // Check if the edited content contains new headings that would create splits
        const newContent = section.editingMarkdown;
        const originalContent = section.originalMarkdown;
        const shouldSplit = this.checkForSectionSplits(newContent, originalContent);

        if (shouldSplit) {
            // Handle section splitting
            this.handleSectionSplit(sectionId, newContent);
        } else {
            // Normal accept without splitting
            const content = section.acceptChanges();
            // Note: No longer tracking single editingSection
            this.emit('changes-accepted', { sectionId, content, section: section.getStatus() });
        }

        return section.currentMarkdown;
    }

    checkForSectionSplits(content, originalContent) {
        if (!content) return false;

        // Split by lines and check for headings
        const lines = content.split('\\n');
        const originalLines = originalContent ? originalContent.split('\\n') : [];

        let newHeadingCount = 0;
        let originalHeadingCount = 0;

        // Count headings in new content
        for (const line of lines) {
            if (/^#{1,6}\s/.test(line.trim())) {
                newHeadingCount++;
            }
        }

        // Count headings in original content
        for (const line of originalLines) {
            if (/^#{1,6}\s/.test(line.trim())) {
                originalHeadingCount++;
            }
        }

        // Split if:
        // 1. We have multiple headings now, OR
        // 2. We added headings where there were none before, OR
        // 3. We have more headings than we started with
        return newHeadingCount > 1 ||
               (originalHeadingCount === 0 && newHeadingCount > 0) ||
               newHeadingCount > originalHeadingCount;
    }

    handleSectionSplit(originalSectionId, content) {
        console.log('Splitting section:', originalSectionId);

        const originalSection = this.sections.get(originalSectionId);
        if (!originalSection) return;

        // Accept the current changes first
        originalSection.acceptChanges();

        // Split the content into new sections
        const newSections = this.createSectionsFromContent(content, originalSectionId);

        // Get all sections as an ordered array to maintain document order
        const allSectionsArray = Array.from(this.sections.values());
        const originalIndex = allSectionsArray.findIndex(s => s.id === originalSectionId);

        // Clear the sections map and rebuild it with proper order
        this.sections.clear();

        // Add sections before the original
        for (let i = 0; i < originalIndex; i++) {
            const section = allSectionsArray[i];
            this.sections.set(section.id, section);
        }

        // Add the new split sections
        newSections.forEach(section => {
            this.sections.set(section.id, section);
        });

        // Add sections after the original
        for (let i = originalIndex + 1; i < allSectionsArray.length; i++) {
            const section = allSectionsArray[i];
            this.sections.set(section.id, section);
        }

        // Note: No longer tracking single editingSection

        // Emit event to trigger UI re-render
        this.emit('section-split', {
            originalSectionId,
            newSections: newSections.map(s => s.getStatus()),
            allSections: Array.from(this.sections.values())
        });
    }

    createSectionsFromContent(content, baseSectionId) {
        const lines = content.split('\\n');
        const sections = [];
        let currentSection = '';
        let position = 0;

        for (let i = 0; i < lines.length; i++) {
            const line = lines[i];
            const isHeading = /^#{1,6}\s/.test(line.trim());

            if (isHeading) {
                // When we encounter a heading, complete any previous section
                if (currentSection.trim()) {
                    const sectionId = `${baseSectionId}_split_${position}`;
                    const sectionType = Section.detectType(currentSection);
                    const section = new Section(sectionId, currentSection.trim(), sectionType);
                    sections.push(section);
                    position++;
                }
                // Start new section with this heading
                currentSection = line;
            } else {
                // Add content to current section
                if (currentSection) currentSection += '\\n';
                currentSection += line;
            }
        }

        // Add the final section if it has content
        if (currentSection.trim()) {
            const sectionId = `${baseSectionId}_split_${position}`;
            const sectionType = Section.detectType(currentSection);
            const section = new Section(sectionId, currentSection.trim(), sectionType);
            sections.push(section);
        }

        return sections;
    }

    cancelChanges(sectionId) {
        const section = this.sections.get(sectionId);
        if (!section) {
            throw new Error(`Section ${sectionId} not found`);
        }
        const content = section.cancelChanges();
        // Note: No longer tracking single editingSection
        this.emit('changes-cancelled', { sectionId, content, section: section.getStatus() });
        return content;
    }

    resetToOriginal(sectionId) {
        const section = this.sections.get(sectionId);
        if (!section) {
            throw new Error(`Section ${sectionId} not found`);
        }
        const content = section.resetToOriginal();
        this.emit('section-reset', { sectionId, content, section: section.getStatus() });
        return content;
    }

    stopEditing(sectionId) {
        const section = this.sections.get(sectionId);
        if (!section) {
            throw new Error(`Section ${sectionId} not found`);
        }

        const newState = section.stopEditing();
        // Note: No longer tracking single editingSection

        this.emit('edit-stopped', { sectionId, newState, section: section.getStatus() });
        return newState;
    }

    getAllSections() {
        return Array.from(this.sections.values());
    }

    getDocumentMarkdown() {
        return this.getAllSections()
            .map(section => section.currentMarkdown)
            .join('\\n\\n');
    }
}

/**
 * DOM Renderer - Handles DOM interactions
 */
class DOMRenderer {
    constructor(sectionManager, containerElement) {
        this.sectionManager = sectionManager;
        this.container = containerElement;
        // Note: Removed single currentSection tracking to allow multiple concurrent edits
        this.editingSections = new Set(); // Track multiple editing sections

        this.handleSectionClick = this.handleSectionClick.bind(this);
        this.handleAccept = this.handleAccept.bind(this);
        this.handleCancel = this.handleCancel.bind(this);
        this.handleReset = this.handleReset.bind(this);
        this.handleKeydown = this.handleKeydown.bind(this);

        this.setupEventListeners();
    }

    setupEventListeners() {
        this.sectionManager.on('sections-created', (data) => {
            this.renderAllSections(data.sections);
        });
        this.sectionManager.on('edit-started', (data) => {
            this.showEditor(data.sectionId, data.content);
        });
        this.sectionManager.on('edit-stopped', (data) => {
            this.hideEditor(data.sectionId);
            // Don't update content - let pending changes remain
        });
        this.sectionManager.on('changes-accepted', (data) => {
            this.hideEditor(data.sectionId);
            this.updateSectionContent(data.sectionId, data.content);
        });
        this.sectionManager.on('changes-cancelled', (data) => {
            this.hideEditor(data.sectionId);
            this.updateSectionContent(data.sectionId, data.content);
        });
        this.sectionManager.on('section-reset', (data) => {
            this.updateTextareaContent(data.content, data.sectionId);
        });
        this.sectionManager.on('section-split', (data) => {
            console.log('Handling section split in UI');
            this.handleSectionSplit(data);
        });
    }

    renderAllSections(sections) {
        this.container.innerHTML = '';
        sections.forEach(section => {
            const element = this.createSectionElement(section);
            section.domElement = element;
            this.container.appendChild(element);
        });
        this.container.addEventListener('click', this.handleSectionClick);
    }

    createSectionElement(section) {
        const element = document.createElement('div');
        element.setAttribute('data-section-id', section.id);

        if (typeof marked !== 'undefined') {
            const html = marked.parse(section.currentMarkdown);
            // Add target="_blank" to all links
            const htmlWithTargetBlank = html.replace(/<a href="([^"]*)"([^>]*)>/g, '<a href="$1" target="_blank"$2>');
            element.innerHTML = htmlWithTargetBlank;
        } else {
            element.innerHTML = `<p>${section.currentMarkdown}</p>`;
        }

        // Setup styling and event handlers
        this.setupSectionElement(element);

        return element;
    }

    handleSectionClick(event) {
        // Don't handle clicks on form elements, buttons, or links
        if (event.target.closest('textarea, button, input, a')) {
            return;
        }

        const sectionElement = event.target.closest('.ui-edit-section');
        if (!sectionElement) return;

        const sectionId = sectionElement.getAttribute('data-section-id');
        if (!sectionId) return;

        // Check if this section is already being edited
        const section = this.sectionManager.sections.get(sectionId);
        if (section && section.isEditing()) {
            console.log('Section already being edited:', sectionId);
            return;
        }

        try {
            console.log('Starting edit for section:', sectionId);
            this.sectionManager.startEditing(sectionId);
        } catch (error) {
            console.error('Failed to start editing:', error);
        }
    }

    showEditor(sectionId, content) {
        const element = this.findSectionElement(sectionId);
        if (!element) return;

        this.hideCurrentEditor();

        const section = this.sectionManager.sections.get(sectionId);
        const isProtectedHeading = section && section.isProtectedHeading();

        const editorContainer = document.createElement('div');
        editorContainer.className = isProtectedHeading ? 'ui-edit-inline-panel ui-insert-protected-panel' : 'ui-edit-inline-panel';
        editorContainer.style.cssText = `
            display: flex;
            flex-direction: column;
            gap: 8px;
            width: 100%;
        `;

        // If this is a protected heading, show the heading display
        if (isProtectedHeading) {
            const headingDisplay = document.createElement('div');
            headingDisplay.className = 'ui-insert-heading-display';
            const headingText = section.getHeadingText();
            const headingLevel = section.headingLevel;
            const headingMarkdown = '#'.repeat(headingLevel) + ' ' + headingText;
            headingDisplay.textContent = headingMarkdown;
            headingDisplay.style.cssText = `
                font-family: 'SF Mono', Monaco, 'Cascadia Code', monospace;
                font-size: 14px;
                font-weight: bold;
                padding: 8px 12px;
                background: rgba(0, 0, 0, 0.05);
                border-radius: 4px;
                border-left: 4px solid #007bff;
                color: #333;
            `;
            editorContainer.appendChild(headingDisplay);
        }

        // Create content editing area
        const editingArea = document.createElement('div');
        editingArea.style.cssText = `
            display: flex;
            gap: 12px;
            align-items: flex-start;
        `;

        const textarea = document.createElement('textarea');
        textarea.className = isProtectedHeading ? 'ui-edit-textarea ui-insert-content-editor' : 'ui-edit-textarea ui-edit-textarea-main';

        // For protected headings, only show content after the heading
        const textareaContent = isProtectedHeading ? section.getHeadingContent() : content;
        textarea.value = textareaContent;

        textarea.style.cssText = `
            flex: 1;
            min-height: 100px;
            font-family: 'SF Mono', Monaco, 'Cascadia Code', monospace;
            border-radius: 6px;
            padding: 12px;
            font-size: 14px;
            line-height: 1.5;
            resize: vertical;
        `;

        textarea.addEventListener('input', () => {
            if (isProtectedHeading) {
                // Reconstruct full content with protected heading
                const headingLine = section.originalMarkdown.split('\\n')[0];
                const fullContent = headingLine + '\\n' + textarea.value;
                this.sectionManager.updateContent(sectionId, fullContent);
            } else {
                this.sectionManager.updateContent(sectionId, textarea.value);
            }
        });
        textarea.addEventListener('keydown', this.handleKeydown);

        const controls = document.createElement('div');
        controls.style.cssText = `
            display: flex;
            flex-direction: column;
            gap: 6px;
        `;

        const createButton = (text, className, handler) => {
            const btn = document.createElement('button');
            btn.textContent = text;
            btn.className = className;
            btn.addEventListener('click', handler);
            return btn;
        };

        controls.appendChild(createButton('✓ Accept', 'ui-edit-button ui-edit-button-accept', () => this.handleAccept(sectionId)));
        controls.appendChild(createButton('✗ Cancel', 'ui-edit-button ui-edit-button-cancel', () => this.handleCancel(sectionId)));
        controls.appendChild(createButton('🔄 Reset', 'ui-edit-button ui-edit-button-reset', () => this.handleReset(sectionId)));

        editingArea.appendChild(textarea);
        editingArea.appendChild(controls);
        editorContainer.appendChild(editingArea);

        element.innerHTML = '';
        element.appendChild(editorContainer);

        textarea.focus();
        // Track this section as being edited
        this.editingSections.add(sectionId);
    }

    hideCurrentEditor() {
        // This method is no longer needed since we support multiple editors
        // Individual editors are hidden via hideEditor(sectionId)
    }

    hideEditor(sectionId) {
        // Remove from editing sections set
        this.editingSections.delete(sectionId);

        // Force re-render the section to ensure it displays correctly
        const section = this.sectionManager.sections.get(sectionId);
        if (section) {
            this.updateSectionContent(sectionId, section.currentMarkdown);
        }
    }

    updateSectionContent(sectionId, content) {
        const element = this.findSectionElement(sectionId);
        if (!element) return;

        if (typeof marked !== 'undefined') {
            const html = marked.parse(content);
            // Add target="_blank" to all links
            const htmlWithTargetBlank = html.replace(/<a href="([^"]*)"([^>]*)>/g, '<a href="$1" target="_blank"$2>');
            element.innerHTML = htmlWithTargetBlank;
        } else {
            element.innerHTML = `<p>${content}</p>`;
        }

        // Restore the section styling and click behavior
        this.setupSectionElement(element);
    }

    setupSectionElement(element) {
        element.className = 'ui-edit-section';
        element.style.cssText = `
            margin: 16px 0;
            padding: 12px;
            border-radius: 6px;
            cursor: pointer;
            transition: all 0.2s ease;
            border: 2px solid transparent;
        `;

        // Remove any existing event listeners to avoid duplicates
        element.removeEventListener('mouseenter', element._mouseenterHandler);
        element.removeEventListener('mouseleave', element._mouseleaveHandler);

        // Create new handlers and store references
        element._mouseenterHandler = () => {
            element.style.backgroundColor = 'rgba(0, 0, 0, 0.02)';
            element.style.borderColor = 'rgba(0, 0, 0, 0.1)';
        };

        element._mouseleaveHandler = () => {
            element.style.backgroundColor = '';
            element.style.borderColor = 'transparent';
        };

        element.addEventListener('mouseenter', element._mouseenterHandler);
        element.addEventListener('mouseleave', element._mouseleaveHandler);
    }

    updateTextareaContent(content, sectionId) {
        // Find the specific textarea for this section
        const element = this.findSectionElement(sectionId);
        if (element) {
            const textarea = element.querySelector('textarea');
            if (textarea) {
                textarea.value = content;
            }
        }
    }

    handleSectionSplit(data) {
        // Clear the editor state for the original section
        this.editingSections.delete(data.originalSectionId);

        // Find the original section element and its position
        const originalElement = this.findSectionElement(data.originalSectionId);
        if (!originalElement) {
            console.error('Original section element not found');
            return;
        }

        // Get the position of the original element
        const originalPosition = Array.from(this.container.children).indexOf(originalElement);

        // Create new section elements for the split sections
        const newElements = [];
        data.newSections.forEach(sectionData => {
            const section = this.sectionManager.sections.get(sectionData.id);
            if (section) {
                const element = this.createSectionElement(section);
                section.domElement = element;
                newElements.push(element);
            }
        });

        // Remove the original element
        originalElement.remove();

        // Insert new elements at the original position
        if (originalPosition < this.container.children.length) {
            const nextElement = this.container.children[originalPosition];
            newElements.forEach(element => {
                this.container.insertBefore(element, nextElement);
            });
        } else {
            // If original was at the end, just append
            newElements.forEach(element => {
                this.container.appendChild(element);
            });
        }

        // Show success message
        console.log(`Section split into ${data.newSections.length} sections`);

        // Notify the main editor about the split
        if (window.markitectCleanEditor) {
            window.markitectCleanEditor.showMessage(
                `✂️ Section split into ${data.newSections.length} sections!`,
                'success'
            );
        }
    }

    findSectionElement(sectionId) {
        return this.container.querySelector(`[data-section-id="${sectionId}"]`);
    }

    handleAccept(sectionId) {
        try {
            console.log('Accepting changes for section:', sectionId);
            this.sectionManager.acceptChanges(sectionId);
            console.log('Changes accepted successfully');
        } catch (error) {
            console.error('Failed to accept changes:', error);
        }
    }

    handleCancel(sectionId) {
        try {
            console.log('Canceling changes for section:', sectionId);
            this.sectionManager.cancelChanges(sectionId);
            console.log('Changes canceled successfully');
        } catch (error) {
            console.error('Failed to cancel changes:', error);
        }
    }

    handleReset(sectionId) {
        try {
            this.sectionManager.resetToOriginal(sectionId);
        } catch (error) {
            console.error('Failed to reset section:', error);
        }
    }

    handleKeydown(event) {
        if (!this.currentSection) return;
        if (event.ctrlKey || event.metaKey) {
            switch (event.key) {
                case 'Enter':
                    event.preventDefault();
                    this.handleAccept(this.currentSection);
                    break;
                case 'Escape':
                    event.preventDefault();
                    this.handleCancel(this.currentSection);
                    break;
            }
        }
        if (event.key === 'Escape') {
            event.preventDefault();
            this.handleCancel(this.currentSection);
        }
    }
}

/**
 * Main Editor Integration
 */
class MarkitectCleanEditor {
    constructor(markdownContent, containerElement, options = {}) {
        this.options = {
            theme: 'github',
            keyboardShortcuts: true,
            autosave: false,
            ...options
        };

        this.sectionManager = new SectionManager();
        this.domRenderer = new DOMRenderer(this.sectionManager, containerElement);
        this.originalMarkdown = markdownContent;
        this.initialize();
    }

    initialize() {
        try {
            const sections = this.sectionManager.createSectionsFromMarkdown(this.originalMarkdown);
            console.log(`✓ Initialized clean editor with ${sections.length} sections`);

            // Add global control panel
            this.addGlobalControls();

            return true;
        } catch (error) {
            console.error('Failed to initialize clean editor:', error);
            return false;
        }
    }

    addGlobalControls() {
        // Create floating control panel
        const panel = document.createElement('div');
        panel.id = 'ui-edit-floater';
        panel.className = 'ui-edit-floater-panel';
        panel.innerHTML = `
            <div class="ui-edit-floater-header">
                <h3>📝 Editor</h3>
                <div class="ui-edit-floater-status" id="editor-status">Ready</div>
            </div>
            <div class="ui-edit-floater-actions">
                <button id="save-document" class="ui-edit-button ui-edit-button-accept">💾 Save Document</button>
                <button id="reset-all" class="ui-edit-button ui-edit-button-reset">🔄 Reset All</button>
                <button id="show-status" class="ui-edit-button ui-edit-button-secondary">📊 Show Status</button>
            </div>
        `;

        // Style the panel
        panel.style.cssText = `
            position: fixed;
            top: 20px;
            right: 20px;
            border-radius: 8px;
            padding: 16px;
            z-index: 1000;
            font-family: system-ui, -apple-system, sans-serif;
            min-width: 200px;
            max-width: 250px;
        `;

        // Add internal styling for structural layout (theme colors come from CSS)
        const style = document.createElement('style');
        style.textContent = `
            .ui-edit-floater-header h3 {
                margin: 0 0 8px 0;
                font-size: 16px;
            }
            .ui-edit-floater-status {
                font-size: 12px;
                margin-bottom: 12px;
            }
            .ui-edit-button {
                display: block;
                width: 100%;
                margin: 6px 0;
                padding: 10px 12px;
                border-radius: 4px;
                cursor: pointer;
                font-size: 14px;
                font-weight: 500;
                transition: all 0.2s;
                border: 1px solid transparent;
            }
        `;
        document.head.appendChild(style);

        document.body.appendChild(panel);

        // Add event listeners
        document.getElementById('save-document').addEventListener('click', () => this.saveDocument());
        document.getElementById('reset-all').addEventListener('click', () => this.resetAllSections());
        document.getElementById('show-status').addEventListener('click', () => this.showStatus());

        // Update status periodically
        this.statusInterval = setInterval(() => this.updateGlobalStatus(), 2000);
    }

    updateGlobalStatus() {
        const statusEl = document.getElementById('editor-status');
        if (!statusEl) return;

        const sections = this.sectionManager.getAllSections();
        const modified = sections.filter(s => s.hasChanges()).length;
        const editing = sections.filter(s => s.isEditing()).length;

        if (editing > 0) {
            statusEl.textContent = `Editing ${editing} section${editing !== 1 ? 's' : ''}`;
            statusEl.className = 'ui-edit-floater-status editing';
        } else if (modified > 0) {
            statusEl.textContent = `${modified} section${modified !== 1 ? 's' : ''} modified`;
            statusEl.style.color = '';
        } else {
            statusEl.textContent = 'All sections saved ✓';
            statusEl.style.color = '';
        }
    }

    saveDocument() {
        const markdown = this.getDocumentMarkdown();
        const blob = new Blob([markdown], { type: 'text/markdown' });
        const url = URL.createObjectURL(blob);

        // Generate intelligent filename
        const filename = this.generateSaveFilename();

        const a = document.createElement('a');
        a.href = url;
        a.download = filename;
        a.style.display = 'none';
        document.body.appendChild(a);
        a.click();
        document.body.removeChild(a);
        URL.revokeObjectURL(url);

        console.log('📄 Document saved as:', filename);
        this.showMessage(`Document saved as: ${filename}`, 'success');
    }

    generateSaveFilename() {
        // Try to get original filename from config
        let baseName = 'document';

        // Method 1: Use original filename from config if available
        if (typeof MARKITECT_EDITOR_CONFIG !== 'undefined' && MARKITECT_EDITOR_CONFIG.originalFilename) {
            baseName = MARKITECT_EDITOR_CONFIG.originalFilename;
        }

        // Method 2: Try to extract from page title
        if (baseName === 'document') {
            const title = document.title;
            if (title && title !== 'Markdown Document' && !title.includes('Debug') && !title.includes('Test')) {
                baseName = title.toLowerCase()
                    .replace(/[^a-z0-9\s-]/g, '') // Remove special chars
                    .replace(/\s+/g, '-') // Replace spaces with dashes
                    .replace(/-+/g, '-') // Collapse multiple dashes
                    .replace(/^-|-$/g, ''); // Remove leading/trailing dashes
            }
        }

        // Method 3: Try to extract from URL pathname
        if (baseName === 'document') {
            const urlPath = window.location.pathname;
            const match = urlPath.match(/\/([^\/]+)\.html?$/);
            if (match) {
                const urlBaseName = match[1];
                if (!urlBaseName.includes('debug') && !urlBaseName.includes('test')) {
                    baseName = urlBaseName.replace(/_/g, '-');
                }
            }
        }

        // Method 4: Try to extract from first heading
        if (baseName === 'document') {
            const firstHeading = this.sectionManager.getAllSections()
                .find(section => section.sectionType === 'heading');
            if (firstHeading) {
                baseName = firstHeading.originalMarkdown
                    .replace(/^#+\s*/, '') // Remove markdown heading syntax
                    .toLowerCase()
                    .replace(/[^a-z0-9\s-]/g, '')
                    .replace(/\s+/g, '-')
                    .replace(/-+/g, '-')
                    .replace(/^-|-$/g, '')
                    .substring(0, 30); // Limit length
            }
        }

        // Generate timestamp
        const now = new Date();
        const timestamp = now.toISOString()
            .replace(/T/, '-')
            .replace(/:/g, '-')
            .replace(/\.\d{3}Z$/, '');

        // Check if there are modifications
        const hasModifications = this.sectionManager.getAllSections()
            .some(section => section.hasChanges());

        if (hasModifications) {
            return `${baseName}-edited-${timestamp}.md`;
        } else {
            return `${baseName}-${timestamp}.md`;
        }
    }

    /**
     * Show custom confirmation dialog with theme-consistent styling
     * @param {string} message - The confirmation message
     * @param {string} confirmText - Text for confirm button (default: "Confirm")
     * @param {string} cancelText - Text for cancel button (default: "Cancel")
     * @param {string} warningText - Optional warning text to highlight consequences
     * @returns {Promise<boolean>} - True if confirmed, false if cancelled
     */
    showConfirmation(message, confirmText = "Confirm", cancelText = "Cancel", warningText = null) {
        return new Promise((resolve) => {
            // Remove any existing modal
            const existingModal = document.querySelector('.ui-edit-modal-overlay');
            if (existingModal) {
                existingModal.remove();
            }

            // Create modal overlay
            const overlay = document.createElement('div');
            overlay.className = 'ui-edit-modal-overlay';

            // Create modal content
            const modal = document.createElement('div');
            modal.className = 'ui-edit-modal ui-edit-confirmation-modal';

            // Create header
            const header = document.createElement('div');
            header.className = 'ui-edit-modal-header';

            const title = document.createElement('h3');
            title.className = 'ui-edit-modal-title';
            title.textContent = 'Confirm Action';

            const closeBtn = document.createElement('button');
            closeBtn.className = 'ui-edit-modal-close';
            closeBtn.innerHTML = '×';
            closeBtn.setAttribute('aria-label', 'Close');

            header.appendChild(title);
            header.appendChild(closeBtn);

            // Create body
            const body = document.createElement('div');
            body.className = 'ui-edit-modal-body';

            const content = document.createElement('div');
            content.className = 'ui-edit-confirmation-content';
            content.textContent = message;
            body.appendChild(content);

            // Add warning section if provided
            if (warningText) {
                const warning = document.createElement('div');
                warning.className = 'ui-edit-confirmation-warning';
                warning.textContent = warningText;
                body.appendChild(warning);
            }

            // Create footer with action buttons
            const footer = document.createElement('div');
            footer.className = 'ui-edit-modal-footer';

            const buttonContainer = document.createElement('div');
            buttonContainer.className = 'ui-edit-confirmation-buttons';

            const cancelBtn = document.createElement('button');
            cancelBtn.className = 'ui-edit-button-cancel';
            cancelBtn.textContent = cancelText;

            const confirmBtn = document.createElement('button');
            confirmBtn.className = 'ui-edit-button-confirm';
            confirmBtn.textContent = confirmText;

            buttonContainer.appendChild(cancelBtn);
            buttonContainer.appendChild(confirmBtn);
            footer.appendChild(buttonContainer);

            // Assemble modal
            modal.appendChild(header);
            modal.appendChild(body);
            modal.appendChild(footer);
            overlay.appendChild(modal);
            document.body.appendChild(overlay);

            // Function to close modal and resolve
            const closeModal = (result) => {
                overlay.remove();
                resolve(result);
            };

            // Event listeners
            closeBtn.addEventListener('click', () => closeModal(false));
            cancelBtn.addEventListener('click', () => closeModal(false));
            confirmBtn.addEventListener('click', () => closeModal(true));

            // Close on overlay click
            overlay.addEventListener('click', (e) => {
                if (e.target === overlay) {
                    closeModal(false);
                }
            });

            // Keyboard support
            const handleKeyDown = (e) => {
                if (e.key === 'Escape') {
                    closeModal(false);
                } else if (e.key === 'Enter') {
                    closeModal(true);
                }
            };

            document.addEventListener('keydown', handleKeyDown);

            // Clean up event listener when modal is closed
            const originalResolve = resolve;
            resolve = (result) => {
                document.removeEventListener('keydown', handleKeyDown);
                originalResolve(result);
            };

            // Show modal with animation
            setTimeout(() => {
                overlay.classList.add('active');
                // Focus the confirm button for accessibility
                confirmBtn.focus();
            }, 10);
        });
    }

    async resetAllSections() {
        const confirmed = await this.showConfirmation(
            'Reset all content to original markdown?',
            'Reset Document',
            'Keep Changes',
            'This will permanently lose all edits and remove any split sections. This action cannot be undone.'
        );

        if (confirmed) {
            // Clear the section manager completely
            this.sectionManager.sections.clear();
            // Note: No longer tracking single editingSection

            // Recreate sections from original markdown
            const sections = this.sectionManager.createSectionsFromMarkdown(this.originalMarkdown);

            console.log('🔄 All sections reset to original structure');
            this.showMessage('Document reset to original structure', 'info');
        }
    }

    showStatus() {
        const sections = this.sectionManager.getAllSections();
        const total = sections.length;
        const modified = sections.filter(s => s.hasChanges()).length;
        const editing = sections.filter(s => s.isEditing()).length;

        // Get the actual save filename that will be used
        const saveFilename = this.generateSaveFilename();

        // Create structured content for the modal
        const modalContent = {
            title: `📊 ${window.editorConfig.repoName} Status`,
            sections: [
                {
                    title: 'Application Information',
                    content: `${window.editorConfig.version}`
                },
                {
                    title: 'File Information',
                    content: `Save file: ${saveFilename}
Source: ${window.editorConfig.originalFilename}
URL: ${window.location.protocol}//${window.location.host}${window.location.pathname}`
                },
                {
                    title: 'Document Status',
                    content: `• Total sections: ${total}
• Modified sections: ${modified}
• Currently editing: ${editing}
• Unsaved changes: ${modified > 0 || editing > 0 ? 'Yes' : 'No'}`
                },
                {
                    title: 'Section Behavior',
                    content: `• Each section is a logical unit (heading + content until next heading)
• Content with line breaks stays in one section
• To split content: Create new headings (# ## ###)
• Sections don't auto-split on line breaks`
                },
                {
                    title: 'Editing Controls',
                    content: `• Click any section to edit its content
• Accept (✓) - Save changes to that section
• Cancel (✗) - Discard changes, return to previous state
• Reset (🔄) - Restore original content for that section
• Save Document - Download all current content
• Reset All - Restore entire document to original state`
                }
            ]
        };

        this.showModal(modalContent);
    }

    showModal(content) {
        // Remove any existing modal
        const existingModal = document.querySelector('.ui-edit-modal-overlay');
        if (existingModal) {
            existingModal.remove();
        }

        // Create modal overlay
        const overlay = document.createElement('div');
        overlay.className = 'ui-edit-modal-overlay';

        // Create modal content
        const modal = document.createElement('div');
        modal.className = 'ui-edit-modal';

        // Create header
        const header = document.createElement('div');
        header.className = 'ui-edit-modal-header';

        const title = document.createElement('h3');
        title.className = 'ui-edit-modal-title';
        title.textContent = content.title;

        const closeBtn = document.createElement('button');
        closeBtn.className = 'ui-edit-modal-close';
        closeBtn.innerHTML = '×';
        closeBtn.setAttribute('aria-label', 'Close');

        header.appendChild(title);
        header.appendChild(closeBtn);

        // Create body
        const body = document.createElement('div');
        body.className = 'ui-edit-modal-body';

        // Add sections
        content.sections.forEach(section => {
            const sectionDiv = document.createElement('div');
            sectionDiv.className = 'ui-edit-modal-section';

            const sectionTitle = document.createElement('div');
            sectionTitle.className = 'ui-edit-modal-section-title';
            sectionTitle.textContent = section.title;

            const sectionContent = document.createElement('div');
            sectionContent.className = 'ui-edit-modal-content';
            sectionContent.textContent = section.content;

            sectionDiv.appendChild(sectionTitle);
            sectionDiv.appendChild(sectionContent);
            body.appendChild(sectionDiv);
        });

        // Create footer with close button
        const footer = document.createElement('div');
        footer.className = 'ui-edit-modal-footer';

        const footerCloseBtn = document.createElement('button');
        footerCloseBtn.className = 'ui-edit-button ui-edit-button-accept';
        footerCloseBtn.textContent = 'Close';
        footer.appendChild(footerCloseBtn);

        // Assemble modal
        modal.appendChild(header);
        modal.appendChild(body);
        modal.appendChild(footer);
        overlay.appendChild(modal);

        // Add to page
        document.body.appendChild(overlay);

        // Close handlers
        const closeModal = () => {
            overlay.classList.remove('active');
            setTimeout(() => {
                if (overlay.parentNode) {
                    overlay.parentNode.removeChild(overlay);
                }
            }, 300);
        };

        closeBtn.addEventListener('click', closeModal);
        footerCloseBtn.addEventListener('click', closeModal);

        // Close on overlay click (but not modal content)
        overlay.addEventListener('click', (e) => {
            if (e.target === overlay) {
                closeModal();
            }
        });

        // Close on Escape key
        const handleKeydown = (e) => {
            if (e.key === 'Escape') {
                closeModal();
                document.removeEventListener('keydown', handleKeydown);
            }
        };
        document.addEventListener('keydown', handleKeydown);

        // Show modal with animation
        requestAnimationFrame(() => {
            overlay.classList.add('active');
        });

        // Focus management
        setTimeout(() => {
            closeBtn.focus();
        }, 100);
    }

    showMessage(message, type = 'info') {
        const messageDiv = document.createElement('div');
        messageDiv.textContent = message;

        const colors = {
            'success': '#28a745',
            'error': '#dc3545',
            'info': '#007acc'
        };

        messageDiv.style.cssText = `
            position: fixed;
            top: 20px;
            left: 50%;
            transform: translateX(-50%);
            background: ${colors[type] || colors.info};
            color: white;
            padding: 12px 20px;
            border-radius: 4px;
            box-shadow: 0 2px 8px rgba(0,0,0,0.2);
            z-index: 10001;
            font-size: 14px;
            max-width: 400px;
            text-align: center;
        `;

        document.body.appendChild(messageDiv);

        setTimeout(() => {
            if (messageDiv.parentNode) {
                messageDiv.parentNode.removeChild(messageDiv);
            }
        }, 3000);
    }

    getDocumentMarkdown() {
        return this.sectionManager.getDocumentMarkdown();
    }
}

// Initialize the clean editor system
let markitectCleanEditor;

function initializeCleanEditor() {
    const container = document.getElementById('markdown-content');
    if (!container) {
        console.error('Markdown content container not found');
        return;
    }

    if (typeof window.MarkitectEditor === 'undefined') {
        console.error('MarkitectEditor not found');
        return;
    }

    markitectCleanEditor = new window.MarkitectEditor.MarkitectCleanEditor(markdownContent, container);
    window.markitectCleanEditor = markitectCleanEditor; // Make globally available
    console.log('✅ Clean section editor initialized successfully');
}

// Document scroll indicators
function initializeScrollIndicators() {
    // Create scroll indicators
    const scrollUpIndicator = document.createElement('div');
    scrollUpIndicator.className = 'ui-scroll-indicator ui-scroll-indicator-up';
    scrollUpIndicator.setAttribute('aria-label', 'Scroll to top');
    scrollUpIndicator.setAttribute('title', 'Scroll up');

    const scrollDownIndicator = document.createElement('div');
    scrollDownIndicator.className = 'ui-scroll-indicator ui-scroll-indicator-down';
    scrollDownIndicator.setAttribute('aria-label', 'Scroll to bottom');
    scrollDownIndicator.setAttribute('title', 'Scroll down');

    document.body.appendChild(scrollUpIndicator);
    document.body.appendChild(scrollDownIndicator);

    let scrollIndicatorTimeout = null;

    // Function to show/hide indicators based on scroll position and mouse position
    function updateScrollIndicators(mouseY = null) {
        const scrollTop = window.pageYOffset || document.documentElement.scrollTop;
        const windowHeight = window.innerHeight;
        const documentHeight = document.documentElement.scrollHeight;

        // Determine if scrolling is possible in each direction
        const canScrollUp = scrollTop > 0;
        const canScrollDown = scrollTop < documentHeight - windowHeight;

        // Only show indicators if there's any scroll possibility or if document is short
        let showUp = false;
        let showDown = false;

        // Show indicators on mouseover near top/bottom of viewport
        if (mouseY !== null) {
            const topZone = 100; // pixels from top
            const bottomZone = windowHeight - 100; // pixels from bottom

            if (mouseY <= topZone) {
                showUp = true;
            }
            if (mouseY >= bottomZone) {
                showDown = true;
            }
        }

        // Update indicator visibility and state
        if (showUp) {
            scrollUpIndicator.classList.add('active');
            if (canScrollUp) {
                scrollUpIndicator.classList.remove('disabled');
            } else {
                scrollUpIndicator.classList.add('disabled');
            }
        } else {
            scrollUpIndicator.classList.remove('active');
        }

        if (showDown) {
            scrollDownIndicator.classList.add('active');
            if (canScrollDown) {
                scrollDownIndicator.classList.remove('disabled');
            } else {
                scrollDownIndicator.classList.add('disabled');
            }
        } else {
            scrollDownIndicator.classList.remove('active');
        }

        // Auto-hide after a delay when mouse moves away
        if (scrollIndicatorTimeout) {
            clearTimeout(scrollIndicatorTimeout);
        }
        scrollIndicatorTimeout = setTimeout(() => {
            scrollUpIndicator.classList.remove('active');
            scrollDownIndicator.classList.remove('active');
        }, 2000);
    }

    // Mouse move handler
    function handleMouseMove(e) {
        updateScrollIndicators(e.clientY);
    }

    // Smooth scroll function
    function smoothScroll(targetY, duration = 500) {
        const startY = window.pageYOffset;
        const difference = targetY - startY;
        const startTime = performance.now();

        function step(currentTime) {
            const elapsed = currentTime - startTime;
            const progress = Math.min(elapsed / duration, 1);

            // Easing function (ease-out)
            const easeOut = 1 - Math.pow(1 - progress, 3);

            window.scrollTo(0, startY + difference * easeOut);

            if (progress < 1) {
                requestAnimationFrame(step);
            }
        }

        requestAnimationFrame(step);
    }

    // Click handlers for smooth scrolling
    scrollUpIndicator.addEventListener('click', () => {
        const currentScroll = window.pageYOffset;
        const targetScroll = Math.max(0, currentScroll - window.innerHeight * 0.8);
        smoothScroll(targetScroll);
    });

    scrollDownIndicator.addEventListener('click', () => {
        const currentScroll = window.pageYOffset;
        const maxScroll = document.documentElement.scrollHeight - window.innerHeight;
        const targetScroll = Math.min(maxScroll, currentScroll + window.innerHeight * 0.8);
        smoothScroll(targetScroll);
    });

    // Event listeners
    document.addEventListener('mousemove', handleMouseMove);
    document.addEventListener('scroll', () => updateScrollIndicators());

    // Initial check
    updateScrollIndicators();

    console.log('✅ Document scroll indicators initialized');
}

// Export for testing and usage
if (typeof module !== 'undefined' && module.exports) {
    module.exports = { Section, SectionManager, DOMRenderer, MarkitectCleanEditor };
} else {
    window.MarkitectEditor = { Section, SectionManager, DOMRenderer, MarkitectCleanEditor };
}
        """