"""Main entry point for Rocky Man."""

import argparse
import logging
import sys
from pathlib import Path

from .utils.config import Config
from .repo import RepoManager
from .processor import ManPageExtractor, ManPageConverter
from .web import WebGenerator


def setup_logging(verbose: bool = False):
    """Configure logging."""
    level = logging.DEBUG if verbose else logging.INFO
    logging.basicConfig(
        level=level,
        format='%(asctime)s - %(name)s - %(levelname)s - %(message)s',
        datefmt='%Y-%m-%d %H:%M:%S'
    )


def process_version(
    config: Config,
    version: str,
    template_dir: Path
) -> bool:
    """Process a single Rocky Linux version.

    Args:
        config: Configuration object
        version: Rocky Linux version to process
        template_dir: Path to templates directory

    Returns:
        True if successful
    """
    logger = logging.getLogger(__name__)
    logger.info(f"Processing Rocky Linux {version}")

    # Setup directories for this version
    version_download_dir = config.get_version_download_dir(version)
    version_extract_dir = config.get_version_extract_dir(version)
    version_output_dir = config.get_version_output_dir(version)

    all_man_files = []

    # Process each repository type
    for repo_type in config.repo_types:
        logger.info(f"Processing {repo_type} repository")

        # Use first available architecture (man pages are arch-independent)
        arch = config.architectures[0]

        # Get repository URL
        repo_url = config.get_repo_url(version, repo_type, arch)

        # Create cache dir for this repo
        cache_dir = config.download_dir / f".cache/{version}/{repo_type}"

        try:
            # Initialize repository manager
            repo_manager = RepoManager(
                repo_url=repo_url,
                version=version,
                repo_type=repo_type,
                arch=arch,
                cache_dir=cache_dir,
                download_dir=version_download_dir
            )

            # List packages (with man pages only)
            packages = repo_manager.list_packages(with_manpages_only=True)

            if not packages:
                logger.warning(f"No packages found in {repo_type}")
                continue

            logger.info(f"Found {len(packages)} packages with man pages in {repo_type}")

            # Filter out packages that should be skipped
            if config.skip_packages:
                original_count = len(packages)
                packages = [
                    pkg for pkg in packages
                    if pkg.name not in config.skip_packages
                ]
                filtered_count = original_count - len(packages)
                if filtered_count > 0:
                    logger.info(f"Filtered out {filtered_count} packages based on skip list")
                    logger.info(f"Processing {len(packages)} packages")

            # Download packages
            logger.info("Downloading packages...")
            downloaded = repo_manager.download_packages(
                packages,
                max_workers=config.parallel_downloads
            )

            # Extract man pages
            logger.info("Extracting man pages...")
            extractor = ManPageExtractor(
                version_extract_dir,
                skip_sections=config.skip_sections,
                skip_languages=config.skip_languages
            )
            man_files = extractor.extract_from_packages(
                downloaded,
                max_workers=config.parallel_downloads
            )

            logger.info(f"Extracted {len(man_files)} man pages")

            # Read content for each man file
            logger.info("Reading man page content...")
            man_files_with_content = []
            for man_file in man_files:
                content = extractor.read_manpage_content(man_file)
                if content:
                    man_files_with_content.append((man_file, content))

            # Convert to HTML
            logger.info("Converting man pages to HTML...")
            converter = ManPageConverter(version_output_dir)
            converted = converter.convert_many(
                man_files_with_content,
                max_workers=config.parallel_conversions
            )

            all_man_files.extend(converted)

            # Cleanup if requested
            if not config.keep_rpms:
                logger.info("Cleaning up downloaded packages...")
                for package in downloaded:
                    repo_manager.cleanup_package(package)

            if not config.keep_extracts:
                logger.info("Cleaning up extracted files...")
                for package in downloaded:
                    extractor.cleanup_extracts(package)

        except Exception as e:
            logger.error(f"Error processing {repo_type}: {e}", exc_info=True)
            continue

    if not all_man_files:
        logger.error(f"No man pages were successfully processed for version {version}")
        return False

    # Link cross-references between man pages
    logger.info("Linking cross-references...")
    converter = ManPageConverter(version_output_dir)
    converter.link_cross_references(all_man_files)

    # Generate web pages
    logger.info("Generating web pages...")
    web_gen = WebGenerator(template_dir, config.output_dir)

    # Generate search index
    search_index = web_gen.generate_search_index(all_man_files, version)
    web_gen.save_search_index(search_index, version)

    # Generate index page
    web_gen.generate_index(version, search_index)

    # Generate packages index page
    web_gen.generate_packages_index(version, search_index)

    # Wrap man pages in templates
    logger.info("Generating man page HTML...")
    for man_file in all_man_files:
        web_gen.generate_manpage_html(man_file, version)

    logger.info(f"Successfully processed {len(all_man_files)} man pages for Rocky Linux {version}")
    return True


def main():
    """Main entry point."""
    parser = argparse.ArgumentParser(
        description='Generate HTML documentation for Rocky Linux man pages'
    )

    parser.add_argument(
        '--versions',
        nargs='+',
        default=['8.10', '9.6', '10.0'],
        help='Rocky Linux versions to process (default: 8.10 9.6 10.0)'
    )

    parser.add_argument(
        '--repo-types',
        nargs='+',
        default=['BaseOS', 'AppStream'],
        help='Repository types to process (default: BaseOS AppStream)'
    )

    parser.add_argument(
        '--output-dir',
        type=Path,
        default=Path('./html'),
        help='Output directory for HTML files (default: ./html)'
    )

    parser.add_argument(
        '--download-dir',
        type=Path,
        default=Path('./tmp/downloads'),
        help='Directory for downloading packages (default: ./tmp/downloads)'
    )

    parser.add_argument(
        '--extract-dir',
        type=Path,
        default=Path('./tmp/extracts'),
        help='Directory for extracting man pages (default: ./tmp/extracts)'
    )

    parser.add_argument(
        '--keep-rpms',
        action='store_true',
        help='Keep downloaded RPM files after processing'
    )

    parser.add_argument(
        '--keep-extracts',
        action='store_true',
        help='Keep extracted man files after processing'
    )

    parser.add_argument(
        '--parallel-downloads',
        type=int,
        default=5,
        help='Number of parallel downloads (default: 5)'
    )

    parser.add_argument(
        '--parallel-conversions',
        type=int,
        default=10,
        help='Number of parallel HTML conversions (default: 10)'
    )

    parser.add_argument(
        '--mirror',
        default='http://dl.rockylinux.org/',
        help='Rocky Linux mirror URL (default: http://dl.rockylinux.org/)'
    )

    parser.add_argument(
        '--template-dir',
        type=Path,
        default=Path(__file__).parent.parent.parent / 'templates',
        help='Template directory (default: ./templates)'
    )

    parser.add_argument(
        '-v', '--verbose',
        action='store_true',
        help='Enable verbose logging'
    )

    parser.add_argument(
        '--skip-sections',
        nargs='*',
        default=None,
        help='Man sections to skip (default: 3 3p 3pm). Use empty list to skip none.'
    )

    parser.add_argument(
        '--skip-packages',
        nargs='*',
        default=None,
        help='Package names to skip (default: lapack dpdk-devel gl-manpages). Use empty list to skip none.'
    )

    parser.add_argument(
        '--skip-languages',
        action='store_true',
        default=None,
        help='Skip non-English man pages (default: enabled)'
    )

    parser.add_argument(
        '--keep-languages',
        action='store_true',
        help='Keep all languages (disables --skip-languages)'
    )

    parser.add_argument(
        '--allow-all-sections',
        action='store_true',
        help='Include all man sections (overrides --skip-sections)'
    )

    args = parser.parse_args()

    # Setup logging
    setup_logging(args.verbose)
    logger = logging.getLogger(__name__)

    # Handle filtering options
    skip_languages = True  # default
    if args.keep_languages:
        skip_languages = False
    elif args.skip_languages is not None:
        skip_languages = args.skip_languages

    # Create configuration
    config = Config(
        base_url=args.mirror,
        versions=args.versions,
        repo_types=args.repo_types,
        download_dir=args.download_dir,
        extract_dir=args.extract_dir,
        output_dir=args.output_dir,
        keep_rpms=args.keep_rpms,
        keep_extracts=args.keep_extracts,
        parallel_downloads=args.parallel_downloads,
        parallel_conversions=args.parallel_conversions,
        skip_sections=args.skip_sections,
        skip_packages=args.skip_packages,
        skip_languages=skip_languages,
        allow_all_sections=args.allow_all_sections
    )

    logger.info("Rocky Man - Rocky Linux Man Page Generator")
    logger.info(f"Versions: {', '.join(config.versions)}")
    logger.info(f"Repositories: {', '.join(config.repo_types)}")
    logger.info(f"Output directory: {config.output_dir}")

    # Log filtering configuration
    if config.skip_sections:
        logger.info(f"Skipping man sections: {', '.join(config.skip_sections)}")
    else:
        logger.info("Including all man sections")

    if config.skip_packages:
        logger.info(f"Skipping packages: {', '.join(config.skip_packages)}")

    if config.skip_languages:
        logger.info("Skipping non-English languages")
    else:
        logger.info("Including all languages")

    # Process each version
    processed_versions = []
    for version in config.versions:
        try:
            if process_version(config, version, args.template_dir):
                processed_versions.append(version)
        except Exception as e:
            logger.error(f"Failed to process version {version}: {e}", exc_info=True)

    if not processed_versions:
        logger.error("No versions were successfully processed")
        return 1

    # Generate root index
    logger.info("Generating root index page...")
    web_gen = WebGenerator(args.template_dir, config.output_dir)
    web_gen.generate_root_index(processed_versions)

    logger.info("=" * 60)
    logger.info("Processing complete!")
    logger.info(f"Generated documentation for: {', '.join(processed_versions)}")
    logger.info(f"Output directory: {config.output_dir.absolute()}")
    logger.info("=" * 60)

    return 0


if __name__ == '__main__':
    sys.exit(main())