from telegram import Update
from telegram.constants import ChatAction
from telegram.error import BadRequest
from telegram.ext import CallbackContext

from config import config
from logger import Log
from plugins.base import BasePlugins
from service import BaseService


class Help(BasePlugins):
    """
    帮助
    """

    def __init__(self, service: BaseService):
        super().__init__(service)
        self.help_png = None
        self.file_id = None

    async def command_start(self, update: Update, _: CallbackContext) -> None:
        message = update.message
        user = update.effective_user
        Log.info(f"用户 {user.full_name}[{user.id}] 发出help命令")
        if self.file_id is None or config.DEBUG:
            await message.reply_chat_action(ChatAction.TYPING)
            help_png = await self.service.template.render('bot/help', "help.html", {}, {"width": 768, "height": 768})
            await message.reply_chat_action(ChatAction.UPLOAD_PHOTO)
            reply_photo = await message.reply_photo(help_png, filename="help.png", allow_sending_without_reply=True)
            photo = reply_photo.photo[0]
            self.file_id = photo.file_id
        else:
            try:
                await message.reply_chat_action(ChatAction.UPLOAD_PHOTO)
                await message.reply_photo(self.file_id, allow_sending_without_reply=True)
            except BadRequest as error:
                self.file_id = None
                Log.error("发送图片失败，尝试清空已经保存的file_id，错误信息为", error)
                await message.reply_text("发送图片失败", allow_sending_without_reply=True)