"""
Unified Entry Point - Direct Mode for HuggingFace Spaces

Simplified architecture for HuggingFace Spaces:
    - Direct service access (no API subprocess)
    - Faster and more reliable
    - No HTTP overhead

For production with separated API/UI, use:
    - python app_api.py (API server)
    - python app_ui.py (UI client)

Usage:
    python app.py
"""

import os
os.environ['PYTORCH_ENABLE_MPS_FALLBACK'] = '1'

import sys

# Use shared UI components with DIRECT service access
from ui.shared_interface import create_interface
from ui.detection_wrapper import detect_with_service


# Configuration
UI_HOST = os.getenv("GRADIO_SERVER_NAME", "0.0.0.0")
UI_PORT = int(os.getenv("GRADIO_SERVER_PORT", "7860"))


def main():
    """Main entry point - Direct service mode for HuggingFace Spaces"""
    
    print("=" * 70)
    print("🎯 CU-1 UI Element Detector - Direct Mode")
    print("=" * 70)
    print("\n📡 Architecture: Direct service access (optimized for HF Spaces)")
    print(f"   - Gradio UI: http://localhost:{UI_PORT}")
    print("\n🏗️  Benefits:")
    print("   - Faster (no HTTP overhead)")
    print("   - More reliable (no subprocess)")
    print("   - Simpler architecture")
    print("=" * 70 + "\n")
    
    try:
        # Create Gradio interface with DIRECT detection function
        demo = create_interface(
            detection_fn=detect_with_service,
            title_suffix="Direct Mode",
            show_api_info=False
        )
        
        print(f"\n🎨 Starting Gradio UI on http://localhost:{UI_PORT}...\n")
        
        # Launch Gradio with automatic port fallback
        # API is automatically exposed at /api/predict for HF Spaces
        try:
            demo.queue().launch(
                server_name=UI_HOST,
                server_port=UI_PORT,
                share=False
            )
        except OSError as e:
            if "Cannot find empty port" in str(e):
                print(f"⚠️  Port {UI_PORT} is busy, trying to find a free port...")
                demo.queue().launch(
                    server_name=UI_HOST,
                    server_port=None,  # Auto-select free port
                    share=False
                )
            else:
                raise
    except KeyboardInterrupt:
        print("\n\n🛑 Shutting down... Goodbye! 👋")
        sys.exit(0)
    except Exception as e:
        print(f"\n❌ Error: {e}")
        import traceback
        traceback.print_exc()
        sys.exit(1)


if __name__ == "__main__":
    main()