from dataclasses import dataclass

from anydi import singleton

from email_campaigns.campaigns.models import EmailCampaign
from email_campaigns.campaigns.services import EmailCampaignService
from email_campaigns.campaigns.validators import CampaignValidator


@dataclass(kw_only=True)
class GetCampaignInternalRequest:
    campaign_id: str


@singleton
class GetCampaignInternalHandler:
    def __init__(
        self,
        campaign_service: EmailCampaignService,
        campaign_validator: CampaignValidator,
    ) -> None:
        self.campaign_service = campaign_service
        self.campaign_validator = campaign_validator

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

        # Validate required fields
        self.campaign_validator.validate_required_fields(campaign, raise_on_error=True)

        return campaign