import subprocess
import atexit
from typing import Tuple, Dict
from opendevin.sandbox.sandbox import Sandbox, BackgroundCommand
from opendevin import config

# ===============================================================================
#  ** WARNING **
#
#  This sandbox should only be used when OpenDevin is running inside a container
#
#  Sandboxes are generally isolated so that they cannot affect the host machine.
#  This Sandbox implementation does not provide isolation, and can inadvertently
#  run dangerous commands on the host machine, potentially rendering the host
#  machine unusable.
#
#  This sandbox is meant for use with OpenDevin Quickstart
#
#  DO NOT USE THIS SANDBOX IN A PRODUCTION ENVIRONMENT
# ===============================================================================


class LocalBox(Sandbox):
    def __init__(self, timeout: int = 120):
        self.timeout = timeout
        self.background_commands: Dict[int, BackgroundCommand] = {}
        self.cur_background_id = 0
        atexit.register(self.cleanup)

    def execute(self, cmd: str) -> Tuple[int, str]:
        try:
            completed_process = subprocess.run(
                cmd, shell=True, text=True, capture_output=True,
                timeout=self.timeout, cwd=config.get('WORKSPACE_BASE')
            )
            return completed_process.returncode, completed_process.stdout
        except subprocess.TimeoutExpired:
            return -1, 'Command timed out'

    def execute_in_background(self, cmd: str) -> BackgroundCommand:
        process = subprocess.Popen(
            cmd, shell=True, stdout=subprocess.PIPE, stderr=subprocess.STDOUT,
            text=True, cwd=config.get('WORKSPACE_BASE')
        )
        bg_cmd = BackgroundCommand(
            id=self.cur_background_id, command=cmd, result=process, pid=process.pid
        )
        self.background_commands[self.cur_background_id] = bg_cmd
        self.cur_background_id += 1
        return bg_cmd

    def kill_background(self, id: int):
        if id not in self.background_commands:
            raise ValueError('Invalid background command id')
        bg_cmd = self.background_commands[id]
        bg_cmd.result.terminate()  # terminate the process
        bg_cmd.result.wait()  # wait for process to terminate
        self.background_commands.pop(id)

    def read_logs(self, id: int) -> str:
        if id not in self.background_commands:
            raise ValueError('Invalid background command id')
        bg_cmd = self.background_commands[id]
        output = bg_cmd.result.stdout.read()
        return output.decode('utf-8')

    def close(self):
        for id, bg_cmd in list(self.background_commands.items()):
            self.kill_background(id)

    def cleanup(self):
        self.close()
