package services

import (
	"lv8girl/internal/models"
	"lv8girl/internal/repositories"
)

type DiscussionService struct {
	discussionRepo *repositories.DiscussionRepository
	likeRepo       *repositories.LikeRepository
	commentRepo    *repositories.CommentRepository
}

func NewDiscussionService() *DiscussionService {
	return &DiscussionService{
		discussionRepo: repositories.NewDiscussionRepository(),
		likeRepo:       repositories.NewLikeRepository(),
		commentRepo:    repositories.NewCommentRepository(),
	}
}

type PostDetailView struct {
	Post            *models.Discussion
	LikeCount       int64
	CommentCount    int64
	UserLiked       bool
	AuthorPostCount int64
}

func (s *DiscussionService) GetPostDetail(postID, userID uint) (*PostDetailView, error) {
	post, err := s.discussionRepo.FindByID(postID)
	if err != nil {
		return nil, err
	}

	likeCount, _ := s.likeRepo.CountByPostID(postID)
	commentCount, _ := s.commentRepo.CountByPostID(postID)
	userLiked := s.likeRepo.Exists(postID, userID)
	authorPostCount, _ := s.discussionRepo.CountByUserID(post.UserID)

	return &PostDetailView{
		Post:            post,
		LikeCount:       likeCount,
		CommentCount:    commentCount,
		UserLiked:       userLiked,
		AuthorPostCount: authorPostCount,
	}, nil
}

func (s *DiscussionService) IncrementViews(postID uint) error {
	return s.discussionRepo.IncrementViews(postID)
}

func (s *DiscussionService) AddLike(postID, userID uint) error {
	if s.likeRepo.Exists(postID, userID) {
		return nil
	}

	like := &models.Like{
		PostID: postID,
		UserID: userID,
	}
	return s.likeRepo.Create(like)
}

func (s *DiscussionService) AddComment(postID, userID uint, content string) error {
	comment := &models.Comment{
		PostID:  postID,
		UserID:  userID,
		Content: content,
	}
	return s.commentRepo.Create(comment)
}

func (s *DiscussionService) GetComments(postID uint) ([]models.Comment, error) {
	return s.commentRepo.FindByPostID(postID)
}

func (s *DiscussionService) CreatePost(userID uint, title, content, imagePath string) error {
	post := &models.Discussion{
		UserID:    userID,
		Title:     title,
		Content:   content,
		ImagePath: imagePath,
		Status:    "pending",
	}
	return s.discussionRepo.Create(post)
}

func (s *DiscussionService) GetApprovedPosts(limit int) ([]repositories.PostListItem, error) {
	return s.discussionRepo.GetPostList(limit)
}