"""
Debug launcher for TraceStudio backend.

Usage:
  python server/debug_run.py

This script starts debugpy listener on port 5678 and then launches uvicorn.
It waits for the debugger to attach before starting the application.
"""
import subprocess
import sys
import os

def main():
    # Ensure debugpy is installed
    try:
        import debugpy  # type: ignore
    except Exception:
        print("debugpy is not installed. Please run: pip install debugpy")
        sys.exit(1)

    # Start debugpy listener in this process and wait for client
    import debugpy  # type: ignore
    host = "0.0.0.0"
    port = 5678
    print(f"Starting debugpy listener on {host}:{port}, waiting for client...")
    debugpy.listen((host, port))
    debugpy.wait_for_client()
    print("Debugger attached, starting uvicorn...")

    # Launch uvicorn as module in the same process
    os.execv(sys.executable, [sys.executable, "-m", "uvicorn", "server.main:app", "--host", "127.0.0.1", "--port", "8000"])

if __name__ == "__main__":
    main()