#!/usr/bin/env python3
"""
Standalone script to run the Watermaker PLC API server.
This can be used when the package installation has issues.
"""

import sys
import os
import argparse

# Add the package directory to Python path
sys.path.insert(0, os.path.dirname(os.path.abspath(__file__)))

from watermaker_plc_api.app import create_app
from watermaker_plc_api.config import Config
from watermaker_plc_api.utils.logger import get_logger
from watermaker_plc_api.services.background_tasks import start_background_updates

logger = get_logger(__name__)


def parse_args():
    """Parse command line arguments"""
    parser = argparse.ArgumentParser(description='Watermaker PLC API Server')
    parser.add_argument('--host', default='0.0.0.0',
                       help='Host to bind to (default: 0.0.0.0)')
    parser.add_argument('--port', type=int, default=5000,
                       help='Port to bind to (default: 5000)')
    parser.add_argument('--plc-ip', default='198.18.100.141',
                       help='PLC IP address (default: 198.18.100.141)')
    parser.add_argument('--plc-port', type=int, default=502,
                       help='PLC Modbus port (default: 502)')
    parser.add_argument('--debug', action='store_true',
                       help='Enable debug mode')
    parser.add_argument('--no-background-updates', action='store_true',
                       help='Disable background data updates')
    return parser.parse_args()


def main():
    """Main application entry point"""
    args = parse_args()
    
    # Update config with command line arguments
    Config.PLC_IP = args.plc_ip
    Config.PLC_PORT = args.plc_port
    Config.DEBUG = args.debug
    
    logger.info("Starting Watermaker PLC API Server (Standalone)")
    logger.info(f"API Version: 1.1.0")
    logger.info(f"PLC Target: {Config.PLC_IP}:{Config.PLC_PORT}")
    logger.info(f"Server: http://{args.host}:{args.port}")
    
    # Create Flask application
    app = create_app()
    
    # Start background data updates (unless disabled)
    if not args.no_background_updates:
        start_background_updates()
        logger.info("Background data update thread started")
    else:
        logger.warning("Background data updates disabled")
    
    logger.info("🚀 Server starting...")
    logger.info("📊 API Documentation: http://localhost:5000/api/config")
    logger.info("❤️  Health Check: http://localhost:5000/api/status")
    
    try:
        # Start the Flask server
        app.run(
            host=args.host,
            port=args.port,
            debug=args.debug,
            threaded=True
        )
    except KeyboardInterrupt:
        logger.info("Server shutdown requested by user")
        sys.exit(0)
    except Exception as e:
        logger.error(f"Failed to start server: {e}")
        sys.exit(1)


if __name__ == '__main__':
    main()