#             █ █ ▀ █▄▀ ▄▀█ █▀█ ▀
#             █▀█ █ █ █ █▀█ █▀▄ █
#              © Copyright 2022
#           https://t.me/hikariatama
#
# 🔒      Licensed under the GNU AGPLv3
# 🌐 https://www.gnu.org/licenses/agpl-3.0.html

import asyncio
import io
import logging
import typing

import requests
from telethon.errors.rpcerrorlist import BotResponseTimeoutError
from telethon.events import MessageEdited, StopPropagation
from telethon.tl.types import Document

from .. import loader, utils


class MusicDLLib(loader.Library):
    developer = "@hikariatama"
    version = (1, 0, 19)

    def __init__(self):
        self.config = loader.LibraryConfig(
            loader.ConfigValue(
                "timeout",
                40,
                "Timeout for downloading",
                validator=loader.validators.Integer(minimum=5),
            ),
            loader.ConfigValue(
                "retries",
                3,
                "Number of retries for downloading",
                validator=loader.validators.Integer(minimum=0),
            ),
            loader.ConfigValue(
                "lossless_priority",
                False,
                "If True, lossless music will be downloaded first",
                validator=loader.validators.Boolean(),
            ),
        )

    async def _dl(self, bot: str, full_name: str):
        try:
            return (await self._client.inline_query(bot, full_name))[0].document
        except Exception:
            return None

    async def _legacy(self, full_name: str):
        document = await self._dl("@vkm4bot", full_name)
        document = (
            await self._dl("@spotifysavebot", full_name) if not document else document
        )
        document = await self._dl("@lybot", full_name) if not document else document
        return document

    async def dl(
        self,
        full_name: str,
        only_document: bool = False,
        retries: int = 0,
    ) -> typing.Union[Document, str]:
        try:
            if not self.config["lossless_priority"]:
                document = await self._legacy(full_name)

            if self.config["lossless_priority"] or not document:
                try:
                    q = await self._client.inline_query("@losslessrobot", full_name)
                except BotResponseTimeoutError:
                    if retries >= self.config["retries"]:
                        raise Exception("Failed to download")

                    await asyncio.sleep(3)
                    return await self.dl(full_name, only_document, retries + 1)

                result = q.result.results[0]
                if not getattr(
                    getattr(result, "send_message", None), "reply_markup", None
                ):
                    document = result.document
                    if text := getattr(
                        getattr(result, "send_message", None), "message", None
                    ):
                        if "FLAC" in text:
                            document.is_flac = True
                else:
                    m = await q[0].click("me")

                    dl_event = asyncio.Event()
                    document = None

                    @self._client.on(MessageEdited(chats=utils.get_chat_id(m)))
                    async def handler(event: MessageEdited):
                        nonlocal document
                        try:
                            if (
                                event.message.id == m.id
                                and (
                                    not getattr(event.message, "reply_markup", None)
                                    or all(
                                        button.text
                                        != "Подождите, трек скоро скачается."
                                        for button in utils.array_sum(
                                            [
                                                row.buttons
                                                for row in event.message.reply_markup.rows
                                            ]
                                        )
                                    )
                                )
                                and event.message.document
                            ):
                                document = event.message.document
                                if text := getattr(event.message, "message", None):
                                    if "FLAC" in text:
                                        document.is_flac = True
                                dl_event.set()

                                raise StopPropagation
                        except StopPropagation:
                            raise
                        except Exception:
                            logging.exception("Failed to download")

                    try:
                        await asyncio.wait_for(
                            dl_event.wait(),
                            timeout=self.config["timeout"],
                        )
                    except Exception:
                        await m.delete()
                        document = None
                    else:
                        await m.delete()
        except Exception:
            logging.debug("Can't download", exc_info=True)
            document = None

        if not document:
            document = await self._legacy(full_name)

        if not document:
            return None

        if only_document:
            return document

        file = io.BytesIO(await self._client.download_file(document, bytes))
        file.name = "audio.mp3"

        try:
            skynet = await utils.run_sync(
                requests.post,
                "https://siasky.net/skynet/skyfile",
                files={"file": file},
            )
        except ConnectionError:
            return None

        return f"https://siasky.net/{skynet.json()['skylink']}"