"""
MrrrMe Backend Entry Point (UNBUFFERED LOGGING)
Forces all print statements to appear immediately in Hugging Face logs
"""
import uvicorn
import os
import sys

# ✅ CRITICAL: Unbuffered output so logs appear immediately
sys.stdout = os.fdopen(sys.stdout.fileno(), 'w', buffering=1)
sys.stderr = os.fdopen(sys.stderr.fileno(), 'w', buffering=1)

print("\n" + "="*80, flush=True)
print("🚀 MrrrMe Modular Backend v2.0 - VERBOSE MODE", flush=True)
print("="*80, flush=True)
print(f"[Startup] 📅 Starting at: {__import__('datetime').datetime.now()}", flush=True)
print(f"[Startup] 🐍 Python: {sys.version}", flush=True)
print(f"[Startup] 📁 Working directory: {os.getcwd()}", flush=True)
print(f"[Startup] 📁 Script: {__file__}", flush=True)

# ✅ Add parent directory to Python path
project_root = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
print(f"[Startup] 📁 Project root: {project_root}", flush=True)

if project_root not in sys.path:
    sys.path.insert(0, project_root)
    print(f"[Startup] ✅ Added to sys.path", flush=True)

# Print path
print(f"[Startup] 🐍 sys.path (first 5):", flush=True)
for i, p in enumerate(sys.path[:5]):
    print(f"[Startup]    {i+1}. {p}", flush=True)

# ✅ Test import
try:
    print("\n[Startup] 🔧 Testing imports...", flush=True)
    from mrrrme.backend.app import app
    print("[Startup] ✅ Import successful!", flush=True)
    
    # Show registered routes
    routes = [route.path for route in app.routes]
    print(f"[Startup] 📋 Registered routes: {len(routes)}", flush=True)
    for route in routes:
        print(f"[Startup]    - {route}", flush=True)
    
except Exception as e:
    print(f"\n[Startup] ❌ FATAL: Cannot import app!", flush=True)
    print(f"[Startup] Error: {e}", flush=True)
    import traceback
    traceback.print_exc()
    
    print("\n[Startup] 🔍 Checking if files exist:", flush=True)
    files_to_check = [
        "mrrrme/__init__.py",
        "mrrrme/backend/__init__.py",
        "mrrrme/backend/app.py",
        "mrrrme/backend/websocket.py",
        "mrrrme/backend/models/loader.py"
    ]
    for f in files_to_check:
        exists = os.path.exists(f)
        print(f"[Startup]    {'✅' if exists else '❌'} {f}", flush=True)
    
    sys.exit(1)

if __name__ == "__main__":
    print("\n" + "="*80, flush=True)
    print("[Startup] 🌐 Starting FastAPI server...", flush=True)
    print("[Startup] 🔗 Host: 0.0.0.0:8000", flush=True)
    print("[Startup] 📝 Logs below (UNBUFFERED):", flush=True)
    print("="*80 + "\n", flush=True)
    
    try:
        uvicorn.run(
            app, 
            host="0.0.0.0", 
            port=8000,
            log_level="info",
            access_log=True,
            use_colors=True
        )
    except KeyboardInterrupt:
        print("\n[Startup] 👋 Shutting down...", flush=True)
    except Exception as e:
        print(f"\n[Startup] ❌ Server crashed: {e}", flush=True)
        import traceback
        traceback.print_exc()
        sys.exit(1)