"""
Main CLI Entry Point

Universal Issue Tracking System CLI
"""

import click
import sys
from pathlib import Path

from .commands import issue_group
from .backend_commands import backend_group
from .sync_commands import sync_group


@click.group()
@click.version_option()
@click.option('--config', type=click.Path(), help='Configuration file path')
@click.option('--backend', help='Backend to use (local, gitea)')
@click.option('--verbose', '-v', is_flag=True, help='Verbose output')
@click.pass_context
def cli(ctx, config, backend, verbose):
    """
    Universal Issue Tracking System

    A backend-agnostic issue tracking tool that works with local SQLite,
    Gitea, GitHub, and other issue tracking systems.

    Examples:
        issue list                    # List all issues
        issue create "Bug in parser"  # Create new issue
        issue show 42                 # Show issue #42
        issue close 42                # Close issue #42

        backend add local ~/.issues   # Add local backend
        backend add gitea myrepo      # Add Gitea backend

        sync pull gitea               # Sync from Gitea
        sync push gitea               # Sync to Gitea
    """
    # Ensure the object exists
    ctx.ensure_object(dict)

    # Store global options in context
    ctx.obj['config_path'] = config
    ctx.obj['backend'] = backend
    ctx.obj['verbose'] = verbose


# Register command groups
cli.add_command(issue_group, name='issue')
cli.add_command(backend_group, name='backend')
cli.add_command(sync_group, name='sync')


# Convenience aliases - direct issue commands
@cli.command('list')
@click.pass_context
def list_issues(ctx):
    """List all issues (alias for 'issue list')."""
    ctx.invoke(issue_group.get_command(ctx, 'list'))


@cli.command('show')
@click.argument('issue_number', type=int)
@click.pass_context
def show_issue(ctx, issue_number):
    """Show issue details (alias for 'issue show')."""
    ctx.invoke(issue_group.get_command(ctx, 'show'), issue_number=issue_number)


@cli.command('create')
@click.argument('title')
@click.option('--description', '-d', help='Issue description')
@click.option('--label', '-l', multiple=True, help='Labels to add')
@click.option('--assignee', '-a', help='Assign to user')
@click.option('--milestone', '-m', help='Milestone')
@click.pass_context
def create_issue(ctx, title, description, label, assignee, milestone):
    """Create new issue (alias for 'issue create')."""
    ctx.invoke(
        issue_group.get_command(ctx, 'create'),
        title=title,
        description=description,
        label=label,
        assignee=assignee,
        milestone=milestone
    )


@cli.command('close')
@click.argument('issue_number', type=int)
@click.option('--comment', '-c', help='Closing comment')
@click.pass_context
def close_issue(ctx, issue_number, comment):
    """Close issue (alias for 'issue close')."""
    ctx.invoke(
        issue_group.get_command(ctx, 'close'),
        issue_number=issue_number,
        comment=comment
    )


def main():
    """Main entry point for the CLI."""
    try:
        cli(obj={})
    except KeyboardInterrupt:
        click.echo("\nAborted by user", err=True)
        sys.exit(1)
    except Exception as e:
        click.echo(f"Error: {e}", err=True)
        sys.exit(1)


if __name__ == '__main__':
    main()