import uvicorn
import os
import sys
import subprocess
from dotenv import load_dotenv

def setup_environment():
    """Ensure dependencies are installed and .env exists."""
    print(">> Initializing Storyline AI Gateway...")
    
    # 1. Check for .env file
    if not os.path.exists(".env"):
        print("!! Warning: .env file not found!")
        print("Please create a .env file based on the documentation.")
    
    # 2. Check for virtual environment and install dependencies if requested
    if len(sys.argv) > 1 and sys.argv[1] == "--install":
        print(">> Installing dependencies from requirements.txt...")
        try:
            subprocess.check_call([sys.executable, "-m", "pip", "install", "-r", "requirements.txt"])
            print("++ Dependencies installed successfully.")
        except Exception as e:
            print(f"-- Error installing dependencies: {e}")
            sys.exit(1)

def run_server():
    """Start the FastAPI server."""
    load_dotenv()
    
    # Configuration
    host = os.getenv("HOST", "127.0.0.1")
    port = int(os.getenv("PORT", 8000))
    # On a server, we usually don't want reload=True by default for performance
    # But for a 'test server', it might be useful.
    reload = os.getenv("DEBUG", "false").lower() == "true"
    
    print(f"\n>> Gateway starting at http://{host}:{port}")
    print(f">> Admin Dashboard: http://{host}:{port}/admin")
    print(f">> API Docs: http://{host}:{port}/docs")
    print(f">> Mode: {'Development (Reload On)' if reload else 'Production (Reload Off)'}\n")

    uvicorn.run(
        "app.main:app",
        host=host,
        port=port,
        reload=reload,
        workers=1 if reload else 4 # Multi-worker for production
    )

if __name__ == "__main__":
    setup_environment()
    run_server()