# -*- coding: utf-8 -*-

# Module author: @DneZyeK

import itertools
import logging
import sys
import traceback
import types

import telethon
from meval import meval

from .. import loader, utils

logger = logging.getLogger(__name__)


@loader.tds
class ExecutorMod(loader.Module):
    """Stores global notes (aka snips)"""

    strings = {
        "name": "Notexec",
        "what_note": "<b>What notexec should be executed?</b>",
        "no_note": "<b>Notexec not found</b>",
        "execute_fail": ("<b>Failed to execute expression:</b>\n<code>{}</code>"),
    }

    async def notexeccmd(self, message):
        """Gets the note specified"""
        args = utils.get_args(message)
        if not args:
            await utils.answer(message, self.strings("what_note", message))
            return

        asset_id = self._db.get("friendly-telegram.modules.notes", "notes", {}).get(
            args[0], None
        )
        logger.debug(asset_id)
        if asset_id is not None:
            asset = await self._db.fetch_asset(asset_id)
        else:
            asset_id = self._db.get("friendly-telegram.modules.notes", "notes", {}).get(
                args[0].lower(), None
            )
            asset = (
                await self._db.fetch_asset(asset_id) if asset_id is not None else None
            )
        if asset is None:
            await utils.answer(message, self.strings("no_note", message))
            return

        cmd = await self._db.fetch_asset(asset_id)

        try:
            await meval(cmd.raw_text, globals(), **await self.getattrs(message))
        except Exception:
            exc = sys.exc_info()
            exc = "".join(
                traceback.format_exception(
                    exc[0], exc[1], exc[2].tb_next.tb_next.tb_next
                )
            )
            await utils.answer(
                message,
                self.strings("execute_fail", message).format(utils.escape_html(exc)),
            )
            return

    async def client_ready(self, client, db):
        self.client = client
        self.db = db
        self._db = db

    async def getattrs(self, message):
        return {
            "message": message,
            "client": self.client,
            "self": self,
            "db": self.db,
            "reply": await message.get_reply_message(),
            "event": message,
            "chat": message.to_id,
            **self.get_types(),
            **self.get_functions(),
        }

    def get_types(self):
        return self.get_sub(telethon.tl.types)

    def get_functions(self):
        return self.get_sub(telethon.tl.functions)

    def get_sub(self, it, _depth=1):
        """Get all callable capitalised objects in an object recursively, ignoring _*"""
        return {
            **dict(
                filter(
                    lambda x: x[0][0] != "_"
                    and x[0][0].upper() == x[0][0]
                    and callable(x[1]),
                    it.__dict__.items(),
                )
            ),
            **dict(
                itertools.chain.from_iterable(
                    [
                        self.get_sub(y[1], _depth + 1).items()
                        for y in filter(
                            lambda x: x[0][0] != "_"
                            and isinstance(x[1], types.ModuleType)
                            and x[1] != it
                            and x[1].__package__.rsplit(".", _depth)[0]
                            == "telethon.tl",
                            it.__dict__.items(),
                        )
                    ]
                )
            ),
        }