# pyright: reportPrivateImportUsage=false

from mautrix.types import EventType, MediaMessageEventContent, MessageType
from mautrix.crypto.attachments import decrypt_attachment

from maubot import Plugin, MessageEvent
from maubot.handlers import event


class HtmlFile(Plugin):
    @event.on(EventType.ROOM_MESSAGE)
    async def event_handler(self, event: MessageEvent) -> None:
        if not event.content.msgtype == MessageType.FILE:
            return
        else:
            content = MediaMessageEventContent.deserialize(event.content.serialize())

        file_content: str = ""
        if content.info and content.info.mimetype == "text/html":
            if content.url:
                file_content = (await self.client.download_media(url=content.url)).decode("utf-8")
            elif content.file and content.file.url:
                enc_file = content.file
                ciphertext = await self.client.download_media(url=content.file.url)
                file_content = decrypt_attachment(ciphertext, enc_file.key.key,
                                                  enc_file.hashes["sha256"], enc_file.iv).decode("utf-8")
            if file_content:
                await event.reply(file_content, allow_html=True)