import os
import sys
import subprocess
import uvicorn

# Dynamically import config
try:
    from app.config import MODEL_PATH, FASTAPI_PORT, LLAMA_PORT, LLAMA_SERVER_PATH, MODEL_NAME
except ImportError:
    print("Error: Could not import app.config. Ensure you are running run.py from its own folder.")
    sys.exit(1)

def check_setup():
    """Verifies that model file and llama-server.exe binary exist before running."""
    model_exists = os.path.exists(MODEL_PATH)
    bin_exists = os.path.exists(LLAMA_SERVER_PATH)

    if not model_exists or not bin_exists:
        print("=======================================================")
        print("WARNING: Required files are missing!")
        if not model_exists:
            print(f"- Model file not found at: {MODEL_PATH}")
        if not bin_exists:
            print(f"- llama-server.exe binary not found at: {LLAMA_SERVER_PATH}")
        print("\nRunning setup.py automatically to download the optimized model and llama.cpp binaries...")
        print("=======================================================\n")
        
        # Run setup.py
        subprocess.run([sys.executable, "setup.py"], check=True)

if __name__ == "__main__":
    # Check if files exist
    check_setup()

    # Launch FastAPI Server
    print("\n=======================================================")
    print(f"Starting IDE Code Completion Engine...")
    print(f"Model: {MODEL_NAME}")
    print(f"FastAPI Host: http://127.0.0.1:{FASTAPI_PORT}")
    print(f"Swagger UI Docs: http://127.0.0.1:{FASTAPI_PORT}/docs")
    print(f"llama-server Backend Port: {LLAMA_PORT}")
    print("=======================================================\n")

    try:
        # Run FastAPI app
        host = os.environ.get("FASTAPI_HOST", "0.0.0.0")
        uvicorn.run("app.main:app", host=host, port=FASTAPI_PORT, reload=False)
    except KeyboardInterrupt:
        print("\nShutdown signal received. Terminating servers gracefully...")
        sys.exit(0)