import io
import sys
import traceback

from os.path import exists, sep
from sys import exit
from platform import node
from getpass import getuser

from pyrogram.enums import ParseMode

from pagermaid.listener import listener
from pagermaid.enums import Message
from pagermaid.services import bot
from pagermaid.utils import attach_log, execute, lang, upload_attachment


@listener(is_plugin=False, command="sh",
          need_admin=True,
          description=lang('sh_des'),
          parameters=lang('sh_parameters'))
async def sh(message: Message):
    """ Use the command-line from Telegram. """
    user = getuser()
    command = message.arguments
    hostname = node()

    if not command:
        await message.edit(lang('arg_error'))
        return

    message = await message.edit(
        f"`{user}`@{hostname} ~"
        f"\n> `$` {command}"
    )

    result = await execute(command)

    if result:
        if len(result) > 4096:
            await attach_log(result, message.chat.id, "output.log", message.id)
            return

        await message.edit(
            f"`{user}`@{hostname} ~"
            f"\n> `#` {command}"
            f"\n`{result}`"
        )
    else:
        return


@listener(is_plugin=False, command="restart",
          need_admin=True,
          description=lang('restart_des'))
async def restart(message: Message):
    """ To re-execute PagerMaid. """
    if not message.text[0].isalpha():
        await message.edit(lang('restart_log'))
        exit(0)


@listener(is_plugin=False, command="eval",
          need_admin=True,
          description=lang('eval_des'),
          parameters=lang('eval_parameters'))
async def sh_eval(message: Message):
    """ Run python commands from Telegram. """
    dev_mode = exists(f"data{sep}dev")
    try:
        assert dev_mode
        cmd = message.text.split(" ", maxsplit=1)[1]
    except (IndexError, AssertionError):
        return await message.edit(lang('eval_need_dev'))
    old_stderr = sys.stderr
    old_stdout = sys.stdout
    redirected_output = sys.stdout = io.StringIO()
    redirected_error = sys.stderr = io.StringIO()
    stdout, stderr, exc = None, None, None
    try:
        await aexec(cmd, message, bot)
    except Exception:  # noqa
        exc = traceback.format_exc()
    stdout = redirected_output.getvalue()
    stderr = redirected_error.getvalue()
    sys.stdout = old_stdout
    sys.stderr = old_stderr
    if exc:
        evaluation = exc
    elif stderr:
        evaluation = stderr
    elif stdout:
        evaluation = stdout
    else:
        evaluation = "Success"
    final_output = f"**>>>** `{cmd}` \n`{evaluation}`"
    if len(final_output) > 4096:
        message = await message.edit(f"**>>>** `{cmd}`", parse_mode=ParseMode.MARKDOWN)
        await attach_log(evaluation, message.chat.id, "output.log", message.id)
    else:
        await message.edit(final_output)


@listener(is_plugin=False, command="send_log",
          need_admin=True,
          description=lang("send_log_des"))
async def send_log(message: Message):
    """ Send log to a chat. """
    if not exists("pagermaid.log.txt"):
        return await message.edit(lang("send_log_not_found"))
    await upload_attachment("pagermaid.log.txt",
                            message.chat.id,
                            message.reply_to_message_id or message.reply_to_top_message_id,
                            thumb=f"pagermaid{sep}assets{sep}logo.jpg",
                            caption=lang("send_log_caption"))
    await message.safe_delete()


async def aexec(code, event, client):
    exec(
        (
                (
                        ("async def __aexec(e, client): " + "\n msg = message = e")
                        + "\n reply = message.reply_to_message"
                )
                + "\n chat = e.chat"
        )
        + "".join(f"\n {x}" for x in code.split("\n"))
    )

    return await locals()["__aexec"](event, client)