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 ows_text_campaigns.campaigns.models import Campaign
from ows_text_campaigns.campaigns.services import CampaignService


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


@singleton
class GetCampaignHandler:
    permission = Permission("text_campaign", "view")

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

    def handle(self, request: GetCampaignRequest) -> Campaign:
        campaign = self.campaign_service.get_campaign(request.campaign_id)

        self.auth_service.check_account_resource(
            request.identity_id,
            account=campaign.account,
            permission=self.permission,
            resource_id=campaign.id,
        )

        # Prefetch audience
        self.campaign_service.prefetch_audience([campaign])

        return campaign