from dataclasses import dataclass
from typing import ClassVar

from fansifter_common.auth.requests import AuthRequest
from fansifter_common.auth.services import AuthService
from fansifter_common.auth.types import Permission

from email_campaigns.adapters.db import Repository
from email_campaigns.emails.exceptions import EmailNotFoundError
from email_campaigns.emails.models import BaseEmail


@dataclass(kw_only=True)
class GetEmailRequest(AuthRequest):
    email_id: str


class GetEmailHandler[T: BaseEmail]:
    permission: ClassVar[Permission]

    def __init__(
        self, auth_service: AuthService, email_repository: Repository[T]
    ) -> None:
        self.auth_service = auth_service
        self.email_repository = email_repository

    def handle(self, request: GetEmailRequest) -> T:
        email = self.email_repository.get(request.email_id)
        if email is None:
            raise EmailNotFoundError

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

        return email