"""
Main application entry point for the Professional RAG Assistant.
"""

import os
import sys
import argparse
import logging
from pathlib import Path

# Add src to path
sys.path.append(str(Path(__file__).parent / "src"))
sys.path.append(str(Path(__file__).parent / "ui"))

from ui.main_interface import create_interface


def setup_logging():
    """Setup basic logging configuration."""
    log_dir = Path("logs")
    log_dir.mkdir(exist_ok=True)
    
    logging.basicConfig(
        level=logging.INFO,
        format='%(asctime)s - %(name)s - %(levelname)s - %(message)s',
        handlers=[
            logging.FileHandler(log_dir / "app.log"),
            logging.StreamHandler()
        ]
    )


def main():
    """Main application entry point."""
    parser = argparse.ArgumentParser(description="Professional RAG Document Assistant")
    parser.add_argument(
        "--config",
        type=str,
        default=None,
        help="Path to configuration file (default: config.yaml or config-local.yaml)"
    )
    parser.add_argument(
        "--host",
        type=str,
        default="0.0.0.0",
        help="Host to bind to (default: 0.0.0.0)"
    )
    parser.add_argument(
        "--port",
        type=int,
        default=7860,
        help="Port to bind to (default: 7860)"
    )
    parser.add_argument(
        "--share",
        action="store_true",
        help="Create a public Gradio link"
    )
    parser.add_argument(
        "--debug",
        action="store_true",
        help="Enable debug mode"
    )
    
    args = parser.parse_args()
    
    # Setup logging
    setup_logging()
    logger = logging.getLogger(__name__)
    
    logger.info("Starting Professional RAG Assistant...")
    logger.info(f"Configuration: {args.config}")
    logger.info(f"Host: {args.host}, Port: {args.port}")
    
    try:
        # Create interface
        interface = create_interface(config_path=args.config)
        
        # Launch interface
        logger.info("Launching Gradio interface...")
        interface.launch(
            server_name=args.host,
            server_port=args.port,
            share=args.share,
            debug=args.debug,
            show_error=True,
            inbrowser=False,  # Don't auto-open browser in production
            favicon_path=None,
            app_kwargs={
                "docs_url": None,  # Disable FastAPI docs
                "redoc_url": None  # Disable ReDoc
            }
        )
        
    except KeyboardInterrupt:
        logger.info("Application stopped by user")
    except Exception as e:
        logger.error(f"Application failed to start: {e}", exc_info=True)
        sys.exit(1)


if __name__ == "__main__":
    main()