from nio import MatrixRoom, RoomMessageText

from ..config import Config
from ..message import MarkdownMessage
from ._plugin import _Plugin


class Plugin(_Plugin):
    help = 'Display this help message'

    @property
    def help_message(self) -> str:
        prefix = Config.CHAT_PREFIX
        message = ('# Help\n'
                   'Use the bot by starting a message with '
                   f'`{prefix}`\n\n'
                   '## Usage\n')

        for plugin in self.__bot.command_plugins:
            plugin = self.__bot.command_plugins[plugin]
            message += f'* {prefix} {plugin.__name} - {plugin.help}\n'
        return message

    async def on_command(self, room: MatrixRoom,
                         message: RoomMessageText) -> None:
        message = MarkdownMessage(self.help_message)
        await message.send(self.client, room)