from dataclasses import dataclass

from anydi import singleton
from fansifter_common.auth.requests import AuthRequest
from fansifter_common.auth.services import AuthService
from fansifter_common.auth.types import Permission
from fansifter_common.utils import timezone

from ows_text_campaigns.adapters.db.decorators import transactional
from ows_text_campaigns.adapters.ows_url_shortener import OwsUrlShortenerClient
from ows_text_campaigns.campaigns.exceptions import CampaignMustBeDraftError
from ows_text_campaigns.campaigns.services import CampaignService


@dataclass(kw_only=True)
class DeleteCampaignRequest(AuthRequest):
    campaign_id: str


@singleton
class DeleteCampaignHandler:
    permission = Permission("text_campaign", "delete")

    def __init__(
        self,
        auth_service: AuthService,
        campaign_service: CampaignService,
        ows_url_shortener_client: OwsUrlShortenerClient,
    ) -> None:
        self.auth_service = auth_service
        self.campaign_service = campaign_service
        self.ows_url_shortener_client = ows_url_shortener_client

    @transactional
    def handle(self, request: DeleteCampaignRequest) -> None:
        campaign = self.campaign_service.get_campaign(request.campaign_id)

        if not campaign.is_draft:
            raise CampaignMustBeDraftError

        self.auth_service.authorize_account(
            request.identity_id,
            account=campaign.account,
            permission=self.permission,
        )

        standard_paths = [
            shortened_url.path
            for shortened_url in campaign.shortened_urls
            if shortened_url.is_standard
        ]

        if standard_paths:
            self.ows_url_shortener_client.delete_paths(standard_paths)

        campaign.deleted_at = timezone.now()
        campaign.deleted_by = request.identity_id

        self.campaign_service.save_campaign(campaign)

        return None