package posts

import (
	"context"
	"time"

	"lmika.dev/lmika/weiro/models"
)

const (
	deleteDebounce = 2 * time.Second
)

func (s *Service) DeletePost(ctx context.Context, pid int64, hardDelete bool) error {
	post, site, err := s.fetchPostAndSite(ctx, pid)
	if err != nil {
		return err
	}

	if hardDelete && post.DeletedAt.Unix() > 0 {
		delta := time.Now().Sub(post.DeletedAt)
		if delta < deleteDebounce {
			return models.DeleteDebounceError
		}

		if err := s.db.HardDeletePost(ctx, post.ID); err != nil {
			return err
		}
	} else {
		if err := s.db.SoftDeletePost(ctx, post.ID); err != nil {
			return err
		}
	}

	s.publisher.Queue(site)

	return nil
}

func (s *Service) RestorePost(ctx context.Context, pid int64) error {
	post, site, err := s.fetchPostAndSite(ctx, pid)
	if err != nil {
		return err
	}

	if err := s.db.RestorePost(ctx, post.ID); err != nil {
		return err
	}

	s.publisher.Queue(site)
	return nil
}

func (s *Service) fetchPostAndSite(ctx context.Context, pid int64) (*models.Post, models.Site, error) {
	site, ok := models.GetSite(ctx)
	if !ok {
		return nil, models.Site{}, models.SiteRequiredError
	}

	user, ok := models.GetUser(ctx)
	if !ok {
		return nil, models.Site{}, models.UserRequiredError
	} else if site.OwnerID != user.ID {
		return nil, models.Site{}, models.PermissionError
	}

	post, err := s.db.SelectPost(ctx, pid)
	if err != nil {
		return nil, models.Site{}, err
	} else if post.SiteID != site.ID {
		return nil, models.Site{}, models.NotFoundError
	}
	return post, site, nil
}