from dataclasses import dataclass
from typing import ClassVar

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 email_campaigns.reporting.exceptions import EmailReportingReportNotFoundError
from email_campaigns.reporting.models import EmailReportingReport
from email_campaigns.reporting.repositories import EmailReportingReportRepository


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


@singleton
class GetEmailReportingReportHandler:
    permission: ClassVar[Permission] = Permission("email_campaign", "view")

    def __init__(
        self,
        auth_service: AuthService,
        report_repository: EmailReportingReportRepository,
    ) -> None:
        self.auth_service = auth_service
        self.report_repository = report_repository

    def handle(self, request: GetEmailReportingReportRequest) -> EmailReportingReport:
        self.auth_service.authorize_for_permission(
            request.identity_id, permission=self.permission
        )

        report = self.report_repository.get_by_id_and_identity_id(
            report_id=request.report_id,
            identity_id=request.identity_id,
        )
        if report is None:
            raise EmailReportingReportNotFoundError

        return report