# ============================================================
#   LEXOSYNTH - HF SPACES ENTRY POINT
#   File : app.py
# ============================================================

import threading
import time
import sys
import os
import requests

def start_flask():
    """Start Flask backend on port 5000 (internal only)."""
    from backend import app
    app.run(
        host        = "0.0.0.0",
        port        = 5000,
        debug       = False,
        use_reloader= False
    )

def wait_for_flask(max_wait=60):
    """Poll Flask /health until ready."""
    print("[Startup] Waiting for Flask backend...", flush=True)
    for _ in range(max_wait):
        try:
            r = requests.get("http://localhost:5000/health", timeout=1)
            if r.status_code == 200:
                print("[Startup] Flask is ready!", flush=True)
                return True
        except Exception:
            pass
        time.sleep(1)
    return False

if __name__ == "__main__":

    # Start Flask in background thread
    flask_thread = threading.Thread(target=start_flask, daemon=True)
    flask_thread.start()

    # Wait for Flask to be ready
    if not wait_for_flask(max_wait=60):
        print("[ERROR] Flask did not start. Exiting.")
        sys.exit(1)

    # Launch Gradio on port 7860 (HF Spaces public port)
    from frontend import demo

    print("[Startup] Launching Gradio interface...", flush=True)

    demo.launch(
        server_name = "0.0.0.0",
        server_port = 7860,
        share=False,              # HF Spaces handles public access — no share needed
        show_api=False,
        debug=False,
        show_error=True
    )