# filename: app.py
# PAM - Privacy-First AI Assistant
# Main entry point for local development and testing

import os
import sys
import uvicorn
from api_service import app

# Configuration
HOST = os.getenv("PAM_HOST", "0.0.0.0")
PORT = int(os.getenv("PAM_PORT", "7860"))
RELOAD = os.getenv("PAM_RELOAD", "false").lower() == "true"
LOG_LEVEL = os.getenv("PAM_LOG_LEVEL", "info")

def main():
    """
    Start the PAM service with Uvicorn
    
    Environment Variables:
        PAM_HOST: Host to bind to (default: 0.0.0.0)
        PAM_PORT: Port to bind to (default: 7860)
        PAM_RELOAD: Enable auto-reload for development (default: false)
        PAM_LOG_LEVEL: Logging level (default: info)
    """
    
    print("=" * 60)
    print("🤖 PAM - Privacy-First AI Assistant")
    print("=" * 60)
    print(f"💕 Frontend PAM: Sweet Southern Receptionist")
    print(f"🤓 Backend PAM: Nerdy Lab Assistant")
    print("=" * 60)
    print(f"🌐 Server: http://{HOST}:{PORT}")
    print(f"📚 API Docs: http://{HOST}:{PORT}/docs")
    print(f"🏥 Health Check: http://{HOST}:{PORT}/health")
    print("=" * 60)
    
    # Check for HF token
    hf_token = os.getenv("HF_READ_TOKEN")
    if not hf_token:
        print("⚠️  WARNING: HF_READ_TOKEN not set!")
        print("   Set it in your environment or Hugging Face Space settings")
        print("=" * 60)
    else:
        print("✅ HF_READ_TOKEN detected")
        print("=" * 60)
    
    try:
        uvicorn.run(
            app,
            host=HOST,
            port=PORT,
            reload=RELOAD,
            log_level=LOG_LEVEL,
            access_log=True,
            workers=1,  # Single worker for HF Spaces
            timeout_keep_alive=75
        )
    except KeyboardInterrupt:
        print("\n👋 PAM shutting down gracefully...")
        sys.exit(0)
    except Exception as e:
        print(f"\n❌ Error starting PAM: {e}")
        sys.exit(1)

if __name__ == "__main__":
    main()