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 dmp.ad_reporting.exceptions import (
    AdReportingCampaignNotFoundError,
    AdReportingReportLastCampaignDeleteError,
)
from dmp.ad_reporting.services import AdReportingReportService
from dmp.adapters.db import ReportingDB, transactional


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


@singleton
class RemoveAdReportingReportCampaignHandler:
    permission = Permission("ad_report", "edit")

    def __init__(
        self,
        db: ReportingDB,
        auth_service: AuthService,
        report_service: AdReportingReportService,
    ) -> None:
        self.db = db
        self.auth_service = auth_service
        self.report_service = report_service

    @transactional
    def handle(self, request: RemoveAdReportingReportCampaignRequest) -> None:
        report = self.report_service.get_report(
            report_id=request.report_id,
            identity_id=request.identity_id,
        )

        self.auth_service.check_owned_resource(
            report.identity_id,
            permission=self.permission,
            resource_id=report.id,
        )

        try:
            report.campaign_ids.remove(request.campaign_id)
        except ValueError as exc:
            raise AdReportingCampaignNotFoundError from exc

        if not report.campaign_ids:
            raise AdReportingReportLastCampaignDeleteError

        self.report_service.save_report(report)

        return None