import io
import os
import pathlib
import shutil
import gradio as gr
from loguru import logger
import subprocess

UPLOAD_DIRECTORY = pathlib.Path("/app/uploaded_files")
CONFIG_PATH = pathlib.Path("/app/yourbench_config.yml")


def save_files(files: list[str]):
    saved_paths = [shutil.move(str(pathlib.Path(file)), str(UPLOAD_DIRECTORY / pathlib.Path(file).name)) for file in files]
    return f"Files saved to: {', '.join(saved_paths)}"


class SubprocessManager:
    def __init__(self, command):
        self.command = command
        self.process = None
        self.output_stream = io.StringIO()

    def start_process(self, oauth_token: gr.OAuthToken | None):
        """Start the subprocess."""
        if self.is_running():
            logger.info("Process is already running")
            return

        self.output_stream = io.StringIO()

        new_env = os.environ.copy()
        # Override env token, when running in gradio space
        if oauth_token:
            new_env["HF_TOKEN"] = oauth_token.token

        self.process = subprocess.Popen(
            self.command,
            stdout=subprocess.PIPE,
            stderr=subprocess.STDOUT,  # Combine stderr with stdout
            text=True,
            bufsize=1,
            start_new_session=True,
            env=new_env
        )
        os.set_blocking(self.process.stdout.fileno(), False)
        logger.info("Started the process")

    def read_and_get_output(self):
        """Read available subprocess output and return the captured output."""
        if self.process and self.process.stdout:
            try:
                while True:
                    line = self.process.stdout.readline()
                    if line:
                        self.output_stream.write(line)  # Capture in StringIO
                    else:
                        break
            except BlockingIOError:
                pass
        return self.output_stream.getvalue()

    def stop_process(self):
        """Terminate the subprocess."""
        if not self.is_running():
            logger.info("Process is not running")
            return
        logger.info("Sending SIGTERM to the Process")
        self.process.terminate()
        exit_code = self.process.wait() # Wait for process to terminate
        logger.info(f"Process stopped exit code {exit_code}")
        #return exit_code

    def kill_process(self):
        """Forcefully kill the subprocess."""
        if not self.is_running():
            logger.info("Process is not running")
            return
        logger.info("Sending SIGKILL to the Process")
        self.process.kill()
        exit_code = self.process.wait() # Wait for process to be killed
        logger.info(f"Process killed exit code {exit_code}")
        #return exit_code

    def is_running(self):
        """Check if the subprocess is still running."""
        return self.process and self.process.poll() is None