package service

import (
	"gotest/internal/repository"
)

// MusicService 音乐服务
type MusicService struct {
	repo *repository.MusicRepository
}

// NewMusicService 创建音乐服务实例
func NewMusicService(repo *repository.MusicRepository) *MusicService {
	return &MusicService{repo: repo}
}

// ListCategories 获取音乐分类
func (s *MusicService) ListCategories() (interface{}, error) {
	return s.repo.ListCategories()
}

// ListSongs 获取歌曲列表
func (s *MusicService) ListSongs(categoryID uint, keyword, sort string, page, pageSize int) (map[string]interface{}, error) {
	songs, total, err := s.repo.ListSongs(categoryID, keyword, sort, page, pageSize)
	if err != nil {
		return nil, err
	}
	return map[string]interface{}{
		"list":      songs,
		"total":     total,
		"page":      page,
		"page_size": pageSize,
	}, nil
}

// GetSong 获取歌曲详情
func (s *MusicService) GetSong(id uint) (interface{}, error) {
	return s.repo.GetSong(id)
}

// ListHot 获取热门歌曲
func (s *MusicService) ListHot(limit int) (interface{}, error) {
	return s.repo.ListHotSongs(limit)
}

// ListNew 获取新歌
func (s *MusicService) ListNew(limit int) (interface{}, error) {
	return s.repo.ListNewSongs(limit)
}

// GetHomeData 获取音乐首页数据（分类 + 热门 + 新歌）
func (s *MusicService) GetHomeData() (map[string]interface{}, error) {
	categories, err := s.repo.ListCategories()
	if err != nil {
		return nil, err
	}
	hot, err := s.repo.ListHotSongs(8)
	if err != nil {
		return nil, err
	}
	newSongs, err := s.repo.ListNewSongs(4)
	if err != nil {
		return nil, err
	}
	return map[string]interface{}{
		"categories": categories,
		"hot":        hot,
		"new":        newSongs,
	}, nil
}