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 email_campaigns.campaigns.enums import EmailCampaignStatus
from email_campaigns.campaigns.repositories import CampaignBatchRepository
from email_campaigns.campaigns.services import EmailCampaignService


@dataclass(kw_only=True)
class GetCampaignLiveStatusResponse:
    status: EmailCampaignStatus
    emails_to_send: int
    sent_emails: int


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


@singleton
class GetCampaignLiveStatusHandler:
    permission = Permission("email_campaign", "view")

    def __init__(
        self,
        auth_service: AuthService,
        campaign_service: EmailCampaignService,
        batch_repository: CampaignBatchRepository,
    ) -> None:
        self.auth_service = auth_service
        self.campaign_service = campaign_service
        self.batch_repository = batch_repository

    def handle(
        self, request: GetCampaignLiveStatusRequest
    ) -> GetCampaignLiveStatusResponse:
        campaign = self.campaign_service.get_campaign(request.campaign_id)
        self.auth_service.authorize_account(
            request.identity_id,
            account=campaign.account,
            permission=self.permission,
        )

        batch_progress = self.batch_repository.get_progress_by_campaign_id(
            request.campaign_id
        )

        if batch_progress is not None:
            return GetCampaignLiveStatusResponse(
                status=campaign.status,
                emails_to_send=batch_progress.total_batch_size,
                sent_emails=batch_progress.total_batch_offset,
            )

        return GetCampaignLiveStatusResponse(
            status=campaign.status,
            emails_to_send=campaign.recipients_count,
            sent_emails=0,
        )