import configparser
import os
import subprocess
import sys


def run_streamlit_app():
    """
    Reads the configuration file and launches the Streamlit app,
    optionally in headless mode.
    """
    config_path = "config/config.ini"
    headless = False

    try:
        if os.path.exists(config_path):
            config = configparser.ConfigParser()
            config.read(config_path)
            if config.has_section("base"):
                headless = config.getboolean("base", "streamlit_headless", fallback=False)
                if headless:
                    print(f"INFO: Headless mode enabled via {config_path}.")
                else:
                    print(f"INFO: Headless mode disabled via {config_path}.")
            else:
                print(f"WARNING: [base] section not found in {config_path}. Defaulting to non-headless.")
        else:
            print(f"WARNING: Configuration file not found at {config_path}. Defaulting to non-headless.")
    except Exception as e:
        print(f"ERROR: Could not read headless config from {config_path}: {e}. Defaulting to non-headless.")
        headless = False  # Ensure default on error

    # Construct the command
    command = [sys.executable, "-m", "streamlit", "run", "src/app.py"]
    if headless:
        command.extend(["--server.headless", "true"])

    print(f"Running command: {' '.join(command)}")

    try:
        # Run Streamlit using subprocess.run which waits for completion
        # Use check=True to raise an error if Streamlit fails
        # Capture output might be useful for debugging but can be complex with interactive apps
        process = subprocess.Popen(command)
        process.wait()  # Wait for the Streamlit process to exit
        print(f"Streamlit process finished with exit code: {process.returncode}")

    except FileNotFoundError:
        print("ERROR: 'streamlit' command not found. Make sure Streamlit is installed and in your PATH.")
        sys.exit(1)
    except Exception as e:
        print(f"ERROR: Failed to run Streamlit: {e}")
        sys.exit(1)


if __name__ == "__main__":
    run_streamlit_app()