import logging
from typing import TYPE_CHECKING

from src import domain, dto

if TYPE_CHECKING:
    from .. import Usecase

log = logging.getLogger(__name__)


async def get_views_history(self: 'Usecase', input: dto.GetViewsHistoryInput) -> list[dto.PostViewsHistoryOutput]:
    context = await self.ensure_workspace_permission(
        input.workspace_id, input.user_id, domain.PermissionKey.PLACEMENTS_READ
    )

    publication = await self.database.get_publication(input.workspace_id, input.publication_id)
    if not publication:
        log.warning('Publication %s not found for user %s', input.publication_id, input.user_id)
        raise domain.PublicationNotFound(input.publication_id)

    if not publication.placement:
        log.error('Publication %s has no placement', publication.id)
        raise domain.PlacementNotFound(publication.placement_id)

    context.ensure_project_permission(domain.PermissionKey.PLACEMENTS_READ, publication.placement.project_id)

    if not publication.post:
        return []

    histories = await self.database.get_views_history(
        publication.post.id,
        from_date=input.from_date,
        to_date=input.to_date,
    )

    return [
        dto.PostViewsHistoryOutput(
            id=history.id,
            post_id=history.post_id,
            views_count=history.views_count,
            fetched_at=history.fetched_at,
            created_at=history.created_at,
        )
        for history in histories
    ]