from pathlib import Path
from typing import List, Optional, Union, TYPE_CHECKING

import aiofiles
import httpx
from httpx import UnsupportedProtocol
from telegram import Chat, Message, ReplyKeyboardRemove, Update
from telegram.error import Forbidden, NetworkError
from telegram.ext import CallbackContext, ConversationHandler, Job

from gram_core.dependence.redisdb import RedisDB
from gram_core.plugin._handler import conversation, handler
from utils.const import CACHE_DIR, REQUEST_HEADERS
from utils.error import UrlResourcesNotFoundError
from utils.helpers import sha1
from utils.log import logger

if TYPE_CHECKING:
    from gram_core.application import Application

try:
    import ujson as json
except ImportError:
    import json

__all__ = (
    "PluginFuncs",
    "ConversationFuncs",
)


class PluginFuncs:
    _application: "Optional[Application]" = None

    def set_application(self, application: "Application") -> None:
        self._application = application

    @property
    def application(self) -> "Application":
        if self._application is None:
            raise RuntimeError("No application was set for this PluginManager.")
        return self._application

    async def _delete_message(self, context: CallbackContext) -> None:
        job = context.job
        message_id = job.data
        chat_info = f"chat_id[{job.chat_id}]"

        try:
            chat = await self.get_chat(job.chat_id)
            full_name = chat.full_name
            if full_name:
                chat_info = f"{full_name}[{chat.id}]"
            else:
                chat_info = f"{chat.title}[{chat.id}]"
        except (NetworkError, Forbidden) as exc:
            logger.warning("获取 chat info 失败 %s", exc.message)
        except Exception as exc:
            logger.warning("获取 chat info 消息失败 %s", str(exc))

        logger.debug("删除消息 %s message_id[%s]", chat_info, message_id)

        try:
            # noinspection PyTypeChecker
            await context.bot.delete_message(chat_id=job.chat_id, message_id=message_id)
        except NetworkError as exc:
            logger.warning("删除消息 %s message_id[%s] 失败 %s", chat_info, message_id, exc.message)
        except Forbidden as exc:
            logger.warning("删除消息 %s message_id[%s] 失败 %s", chat_info, message_id, exc.message)
        except Exception as exc:
            logger.error("删除消息 %s message_id[%s] 失败 %s", chat_info, message_id, exc_info=exc)

    async def get_chat(self, chat_id: Union[str, int], redis_db: Optional[RedisDB] = None, expire: int = 86400) -> Chat:
        application = self.application
        redis_db: RedisDB = redis_db or self.application.managers.dependency_map.get(RedisDB, None)

        if not redis_db:
            return await application.bot.get_chat(chat_id)

        qname = f"bot:chat:{chat_id}"

        data = await redis_db.client.get(qname)
        if data:
            json_data = json.loads(data)
            return Chat.de_json(json_data, application.telegram.bot)

        chat_info = await application.telegram.bot.get_chat(chat_id)
        await redis_db.client.set(qname, chat_info.to_json(), ex=expire)
        return chat_info

    def add_delete_message_job(
        self,
        message: Optional[Union[int, Message]] = None,
        *,
        delay: int = 60,
        name: Optional[str] = None,
        chat: Optional[Union[int, Chat]] = None,
        context: Optional[CallbackContext] = None,
    ) -> Job:
        """延迟删除消息"""

        if isinstance(message, Message):
            if chat is None:
                chat = message.chat_id
            message = message.id

        chat = chat.id if isinstance(chat, Chat) else chat

        job_queue = self.application.job_queue or context.job_queue

        if job_queue is None or chat is None:
            raise RuntimeError

        return job_queue.run_once(
            callback=self._delete_message,
            when=delay,
            data=message,
            name=f"{chat}|{message}|{name}|delete_message" if name else f"{chat}|{message}|delete_message",
            chat_id=chat,
            job_kwargs={"replace_existing": True, "id": f"{chat}|{message}|delete_message"},
        )

    @staticmethod
    async def download_resource(url: str, return_path: bool = False) -> str:
        url_sha1 = sha1(url)  # url 的 hash 值
        pathed_url = Path(url)

        file_name = url_sha1 + pathed_url.suffix
        file_path = CACHE_DIR.joinpath(file_name)

        if not file_path.exists():  # 若文件不存在，则下载
            async with httpx.AsyncClient(headers=REQUEST_HEADERS, timeout=10) as client:
                try:
                    response = await client.get(url)
                except UnsupportedProtocol:
                    logger.error("链接不支持 url[%s]", url)
                    return ""

                if response.is_error:
                    logger.error("请求出现错误 url[%s] status_code[%s]", url, response.status_code)
                    raise UrlResourcesNotFoundError(url)

                if response.status_code != 200:
                    logger.error("download_resource 获取url[%s] 错误 status_code[%s]", url, response.status_code)
                    raise UrlResourcesNotFoundError(url)

            async with aiofiles.open(file_path, mode="wb") as f:
                await f.write(response.content)

        logger.debug("download_resource 获取url[%s] 并下载到 file_dir[%s]", url, file_path)

        return file_path if return_path else Path(file_path).as_uri()

    @staticmethod
    def get_args(context: CallbackContext) -> List[str]:
        args = context.args
        match = context.match

        if args is None:
            if match is not None and (command := match.groups()[0]):
                temp = []
                command_parts = command.split(" ")
                for command_part in command_parts:
                    if command_part:
                        temp.append(command_part)
                return temp
            return []
        if len(args) >= 1:
            return args
        return []


class ConversationFuncs:
    @conversation.fallback
    @handler.command(command="cancel", block=False)
    async def cancel(self, update: Update, _) -> int:
        await update.effective_message.reply_text("退出命令", reply_markup=ReplyKeyboardRemove())
        return ConversationHandler.END