package service

import (
	"gotest/internal/repository"
)

// ShopService 电商商品服务
type ShopService struct {
	repo *repository.ShopRepository
}

// NewShopService 创建电商服务实例
func NewShopService(repo *repository.ShopRepository) *ShopService {
	return &ShopService{repo: repo}
}

// ListCategories 获取分类列表
func (s *ShopService) ListCategories() (interface{}, error) {
	return s.repo.ListCategories()
}

// ListProducts 获取商品列表
func (s *ShopService) ListProducts(categoryID uint, keyword, sort string, page, pageSize int) (map[string]interface{}, error) {
	products, total, err := s.repo.ListProducts(categoryID, keyword, sort, page, pageSize)
	if err != nil {
		return nil, err
	}
	return map[string]interface{}{
		"list":      products,
		"total":     total,
		"page":      page,
		"page_size": pageSize,
	}, nil
}

// GetProduct 获取商品详情
func (s *ShopService) GetProduct(id uint) (interface{}, error) {
	return s.repo.GetProduct(id)
}

// ListFeatured 获取推荐商品
func (s *ShopService) ListFeatured(limit int) (interface{}, error) {
	return s.repo.ListFeaturedProducts(limit)
}

// GetHomeData 获取商城首页数据（分类 + 推荐商品）
func (s *ShopService) GetHomeData() (map[string]interface{}, error) {
	categories, err := s.repo.ListCategories()
	if err != nil {
		return nil, err
	}
	featured, err := s.repo.ListFeaturedProducts(8)
	if err != nil {
		return nil, err
	}
	return map[string]interface{}{
		"categories": categories,
		"featured":   featured,
	}, nil
}