from dataclasses import dataclass

from anydi import singleton

from ows_text_campaigns.campaigns.enums import MessageChannel
from ows_text_campaigns.campaigns.services import CampaignService
from ows_text_campaigns.campaigns.types import MessagePreview


@dataclass(kw_only=True)
class GetCampaignMessagePreviewRequest:
    campaign_id: str
    channel: MessageChannel
    include_unsubscribe_text: bool = True


@singleton
class GetCampaignMessagePreviewHandler:
    def __init__(self, campaign_service: CampaignService) -> None:
        self.campaign_service = campaign_service

    def handle(self, request: GetCampaignMessagePreviewRequest) -> MessagePreview:
        campaign = self.campaign_service.get_campaign(request.campaign_id)
        return self.campaign_service.get_message_preview(
            campaign,
            channel=request.channel,
            include_unsubscribe_text=request.include_unsubscribe_text,
        )