import logging
from typing import TYPE_CHECKING

from src import domain, dto

if TYPE_CHECKING:
    from .. import Usecase

log = logging.getLogger(__name__)


async def delete_external_channel(self: 'Usecase', input: dto.DeleteExternalChannelInput) -> None:
    await self.ensure_workspace_access(input.workspace_id, input.user_id)

    channel = await self.database.get_external_channel(input.workspace_id, channel_id=input.channel_id)
    if not channel:
        raise domain.ExternalChannelNotFound(input.channel_id)

    await self.database.delete_external_channel(input.channel_id)
    log.info('User %s deleted external channel %s', input.user_id, input.channel_id)