import logging
import uuid
from typing import TYPE_CHECKING

from src import domain, dto

if TYPE_CHECKING:
    from .. import Usecase

log = logging.getLogger(__name__)


async def attach_channel_to_purchase_plan(
    self: 'Usecase',
    project_id: uuid.UUID,
    workspace_id: uuid.UUID,
    user_id: uuid.UUID,
    input: dto.AttachChannelToPurchasePlanInput,
) -> dto.PurchasePlanChannelOutput:
    await self.ensure_workspace_access(workspace_id, user_id)

    project = await self.database.get_project(workspace_id, project_id=project_id)
    if not project:
        raise domain.ProjectNotFound(project_id)

    plan = await self.ensure_active_purchase_plan(project)

    # Поиск канала по username
    channel = await self.database.get_channel(workspace_id, username=input.username)

    if not channel:
        # Создать неподтвержденный канал
        channel = domain.Channel(
            workspace_id=workspace_id,
            username=input.username,
            telegram_id=None,
            title=None,
            verification_status=domain.ChannelVerificationStatus.UNVERIFIED,
        )
        await self.database.create_channel(channel)
        log.info('Created unverified channel with username %s', input.username)
    else:
        log.info('Found existing channel %s for username %s', channel.id, input.username)

    plan_channel = await self.database.add_channel_to_purchase_plan(
        plan.id,
        channel.id,
        status=input.status,
        planned_cost=input.planned_cost,
        comment=input.comment,
    )

    log.info('Channel %s attached to purchase plan %s (project %s)', channel.id, plan.id, project.id)

    return dto.PurchasePlanChannelOutput(
        id=plan_channel.id,
        status=plan_channel.status,
        planned_cost=plan_channel.planned_cost,
        comment=plan_channel.comment,
        channel=dto.ChannelOutput(
            id=channel.id,
            telegram_id=channel.telegram_id,
            title=channel.title,
            username=channel.username,
            verification_status=channel.verification_status,
        ),
    )