#!/usr/bin/env python3
"""
Ad-hoc Flask HTTPS Server for LED Controller Webapp
Serves the webapp over HTTPS (required for Web Bluetooth API)
"""

import os
import sys
from flask import Flask, send_from_directory, send_file
from pathlib import Path

# Configuration
HOST = '0.0.0.0'  # Listen on all interfaces
PORT = 5000       # HTTPS port
DEBUG = True

# Get webapp directory (one level up from tools/)
SCRIPT_DIR = Path(__file__).parent
WEBAPP_DIR = SCRIPT_DIR.parent / 'webapp'

# Verify webapp directory exists
if not WEBAPP_DIR.exists():
    print(f"❌ ERROR: Webapp directory not found at {WEBAPP_DIR}")
    print(f"   Please run this script from the base repository directory")
    sys.exit(1)

# Create Flask app
app = Flask(__name__)

@app.route('/')
def index():
    """Serve index.html"""
    return send_file(WEBAPP_DIR / 'index.html')

@app.route('/app/<path:filename>')
def serve_app(filename):
    """Serve files from app/ directory"""
    return send_from_directory(WEBAPP_DIR / 'app', filename)

@app.route('/css/<path:filename>')
def serve_css(filename):
    """Serve files from css/ directory"""
    return send_from_directory(WEBAPP_DIR / 'css', filename)

@app.route('/data/<path:filename>')
def serve_data(filename):
    """Serve files from data/ directory"""
    return send_from_directory(WEBAPP_DIR / 'data', filename)

@app.route('/favicon.ico')
def favicon():
    """Serve favicon"""
    return send_file(WEBAPP_DIR / 'data' / 'favicon.ico')

def print_banner():
    """Print startup banner with instructions"""
    print("=" * 70)
    print("   🚀 LED Controller HTTPS Development Server")
    print("=" * 70)
    print()
    print("📱 Web Bluetooth requires HTTPS!")
    print("   This server provides a self-signed certificate for development.")
    print()
    print("🌐 Access the webapp at:")
    print(f"   https://localhost:{PORT}")
    print(f"   https://127.0.0.1:{PORT}")
    print(f"   https://<your-ip>:{PORT}")
    print()
    print("⚠️  Browser Security Warning:")
    print("   You'll see a 'Not Secure' warning - this is normal!")
    print("   Click 'Advanced' → 'Proceed to localhost' (or similar)")
    print()
    print("🔧 To stop the server: Press Ctrl+C")
    print("=" * 70)
    print()

def get_local_ip():
    """Get local IP address for convenience"""
    import socket
    try:
        s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
        s.connect(("8.8.8.8", 80))
        ip = s.getsockname()[0]
        s.close()
        return ip
    except:
        return "unknown"

if __name__ == '__main__':
    print_banner()
    
    # Print local IP for convenience
    local_ip = get_local_ip()
    if local_ip != "unknown":
        print(f"💡 Your local IP: {local_ip}")
        print(f"   Access from phone: https://{local_ip}:{PORT}")
        print()
    
    print("🔄 Starting HTTPS server...")
    print()
    
    try:
        # Run with ad-hoc SSL context (self-signed certificate)
        # Flask will automatically generate a certificate
        app.run(
            host=HOST,
            port=PORT,
            debug=DEBUG,
            ssl_context='adhoc'  # Auto-generate self-signed cert
        )
    except OSError as e:
        if "Address already in use" in str(e):
            print(f"❌ ERROR: Port {PORT} is already in use!")
            print(f"   Try a different port or stop the other service.")
            sys.exit(1)
        else:
            raise
    except KeyboardInterrupt:
        print("\n\n👋 Server stopped by user")
        sys.exit(0)