#!/usr/bin/env node

/**
 * TDD Test for Extracted SectionManager Component
 *
 * Tests the extracted SectionManager component independently from the monolith.
 * Verifies that all functionality is preserved after extraction.
 */

const RefactorTestRunner = require('./refactor-test-runner.js');

const runner = new RefactorTestRunner();

runner.describe('Extracted SectionManager Component', () => {

    runner.it('should load extracted SectionManager component', () => {
        // Load the extracted component
        delete require.cache[require.resolve('../core/section-manager.js')];

        try {
            const module = require('../core/section-manager.js');
            runner.expect(module.SectionManager).toBeTruthy();
            runner.expect(module.Section).toBeTruthy();
            runner.expect(module.EditState).toBeTruthy();
            runner.expect(module.SectionType).toBeTruthy();

            // Set globals for other tests
            global.ExtractedSectionManager = module.SectionManager;
            global.ExtractedSection = module.Section;
            global.ExtractedEditState = module.EditState;
            global.ExtractedSectionType = module.SectionType;
        } catch (error) {
            throw new Error(`Failed to load extracted SectionManager: ${error.message}`);
        }
    });

    runner.it('should preserve constructor functionality', () => {
        const SectionManager = global.ExtractedSectionManager;

        const manager = new SectionManager();
        runner.expect(manager).toBeInstanceOf(SectionManager);
        runner.expect(manager.sections).toBeInstanceOf(Map);
        runner.expect(manager.listeners).toBeInstanceOf(Map);
    });

    runner.it('should preserve section creation functionality', () => {
        const SectionManager = global.ExtractedSectionManager;
        const manager = new SectionManager();

        const testMarkdown = `# Heading 1\nContent 1\n\n## Heading 2\nContent 2`;
        const sections = manager.createSectionsFromMarkdown(testMarkdown);

        runner.expect(Array.isArray(sections)).toBeTruthy();
        runner.expect(sections.length).toBe(2);
        runner.expect(sections[0].currentMarkdown).toContain('Heading 1');
        runner.expect(sections[1].currentMarkdown).toContain('Heading 2');
    });

    runner.it('should preserve section editing functionality', () => {
        const SectionManager = global.ExtractedSectionManager;
        const manager = new SectionManager();

        const sections = manager.createSectionsFromMarkdown('# Test\nContent');
        const sectionId = sections[0].id;

        // Test start editing
        const content = manager.startEditing(sectionId);
        runner.expect(content).toContain('Test');

        const section = manager.sections.get(sectionId);
        runner.expect(section.isEditing()).toBeTruthy();

        // Test stop editing
        section.stopEditing();
        runner.expect(section.isEditing()).toBeFalsy();
    });

    runner.it('should preserve event system functionality', () => {
        const SectionManager = global.ExtractedSectionManager;
        const manager = new SectionManager();

        let eventFired = false;
        let eventData = null;

        manager.on('test-event', (data) => {
            eventFired = true;
            eventData = data;
        });

        manager.emit('test-event', { test: 'data' });

        runner.expect(eventFired).toBeTruthy();
        runner.expect(eventData).toEqual({ test: 'data' });
    });

    runner.it('should preserve document status functionality', () => {
        const SectionManager = global.ExtractedSectionManager;
        const manager = new SectionManager();

        manager.createSectionsFromMarkdown('# Test\nContent');
        const status = manager.getDocumentStatus();

        runner.expect(status).toHaveProperty('totalSections');
        runner.expect(status).toHaveProperty('editingSections');
        runner.expect(status.totalSections).toBe(1);
    });

    runner.it('should preserve getAllSections functionality', () => {
        const SectionManager = global.ExtractedSectionManager;
        const manager = new SectionManager();

        const testMarkdown = '# One\nContent\n\n# Two\nMore content';
        manager.createSectionsFromMarkdown(testMarkdown);

        const allSections = manager.getAllSections();
        runner.expect(Array.isArray(allSections)).toBeTruthy();
        runner.expect(allSections.length).toBe(2);
    });

    runner.it('should preserve section splitting functionality', () => {
        const SectionManager = global.ExtractedSectionManager;
        const manager = new SectionManager();

        const sections = manager.createSectionsFromMarkdown('# Original\nContent');
        const sectionId = sections[0].id;

        const newContent = '# Split 1\nContent 1\n\n# Split 2\nContent 2';
        const newSections = manager.handleSectionSplit(sectionId, newContent);

        runner.expect(Array.isArray(newSections)).toBeTruthy();
        runner.expect(newSections.length).toBe(2);
        runner.expect(manager.sections.has(sectionId)).toBeFalsy(); // Original removed
    });

    runner.it('should preserve Section class functionality', () => {
        const Section = global.ExtractedSection;
        const EditState = global.ExtractedEditState;

        const section = new Section('test-id', '# Test Content', 'heading');

        runner.expect(section.id).toBe('test-id');
        runner.expect(section.currentMarkdown).toBe('# Test Content');
        runner.expect(section.type).toBe('heading');
        runner.expect(section.state).toBe(EditState.ORIGINAL);
    });

    runner.it('should preserve Section ID generation', () => {
        const Section = global.ExtractedSection;

        const id1 = Section.generateId('# Test Heading', 0);
        const id2 = Section.generateId('# Different Heading', 1);

        runner.expect(typeof id1 === 'string').toBeTruthy();
        runner.expect(typeof id2 === 'string').toBeTruthy();
        runner.expect(id1).toContain('section-');
        runner.expect(id2).toContain('section-');
        runner.expect(id1 !== id2).toBeTruthy(); // Should be unique
    });

    runner.it('should preserve Section type detection', () => {
        const Section = global.ExtractedSection;
        const SectionType = global.ExtractedSectionType;

        runner.expect(Section.detectType('# Heading')).toBe(SectionType.HEADING);
        runner.expect(Section.detectType('![Image](url)')).toBe(SectionType.IMAGE);
        runner.expect(Section.detectType('```code```')).toBe(SectionType.CODE);
        runner.expect(Section.detectType('Regular paragraph')).toBe(SectionType.PARAGRAPH);
    });

    // Comparative test - verify extracted component behaves identically to original
    runner.it('should behave identically to original monolithic component', () => {
        // Load both components
        const originalModule = require('/home/worsch/markitect_project/markitect/static/editor.js');
        const extractedModule = require('../core/section-manager.js');

        const originalManager = new originalModule.SectionManager();
        const extractedManager = new extractedModule.SectionManager();

        const testMarkdown = '# Test\nContent\n\n## Subheading\nMore content';

        // Debug: Check what each component produces
        console.log('Creating sections with original component...');
        const originalSections = originalManager.createSectionsFromMarkdown(testMarkdown);
        console.log(`Original produced ${originalSections.length} sections`);

        console.log('Creating sections with extracted component...');
        const extractedSections = extractedManager.createSectionsFromMarkdown(testMarkdown);
        console.log(`Extracted produced ${extractedSections.length} sections`);

        if (originalSections.length > 0) {
            console.log('Original first section:', originalSections[0].currentMarkdown);
        }
        if (extractedSections.length > 0) {
            console.log('Extracted first section:', extractedSections[0].currentMarkdown);
        }

        // Should have same number of sections
        runner.expect(extractedSections.length).toBe(originalSections.length);

        // Should have same content
        for (let i = 0; i < originalSections.length; i++) {
            runner.expect(extractedSections[i].currentMarkdown).toBe(originalSections[i].currentMarkdown);
            runner.expect(extractedSections[i].type).toBe(originalSections[i].type);
        }

        // Should have same document status structure
        const originalStatus = originalManager.getDocumentStatus();
        const extractedStatus = extractedManager.getDocumentStatus();

        console.log('Original status:', originalStatus);
        console.log('Extracted status:', extractedStatus);

        runner.expect(extractedStatus.totalSections).toBe(originalStatus.totalSections);
        runner.expect(extractedStatus.editingSections).toBe(originalStatus.editingSections);
    });
});

module.exports = runner;

// Run tests if called directly
if (require.main === module) {
    console.log('🧪 Testing Extracted SectionManager Component');
    runner.run().then(() => {
        console.log('✅ Extracted SectionManager tests completed');
    });
}