package repository

import (
	"gotest/internal/model"

	"gorm.io/gorm"
)

// AppRepository 应用数据访问层
type AppRepository struct {
	db *gorm.DB
}

// NewAppRepository 创建应用仓库实例
func NewAppRepository(db *gorm.DB) *AppRepository {
	return &AppRepository{db: db}
}

// ListCategories 获取应用分类列表
func (r *AppRepository) ListCategories() ([]model.AppCategory, error) {
	var categories []model.AppCategory
	if err := r.db.Order("sort ASC, id ASC").Find(&categories).Error; err != nil {
		return nil, err
	}
	return categories, nil
}

// ListApps 获取应用列表，支持分类过滤、关键词搜索和排序
func (r *AppRepository) ListApps(categoryID uint, keyword string, sort string, page, pageSize int) ([]model.App, int64, error) {
	var apps []model.App
	var total int64

	query := r.db.Where("status = 1")
	if categoryID > 0 {
		query = query.Where("category_id = ?", categoryID)
	}
	if keyword != "" {
		query = query.Where("name LIKE ? OR tags LIKE ? OR developer LIKE ?", "%"+keyword+"%", "%"+keyword+"%", "%"+keyword+"%")
	}

	if err := query.Model(&model.App{}).Count(&total).Error; err != nil {
		return nil, 0, err
	}

	switch sort {
	case "rating":
		query = query.Order("rating DESC")
	case "downloads":
		query = query.Order("downloads DESC")
	case "newest":
		query = query.Order("update_date DESC")
	default:
		query = query.Order("sort ASC, id DESC")
	}

	if page > 0 && pageSize > 0 {
		offset := (page - 1) * pageSize
		query = query.Offset(offset).Limit(pageSize)
	}

	if err := query.Find(&apps).Error; err != nil {
		return nil, 0, err
	}
	return apps, total, nil
}

// GetApp 根据 ID 获取应用详情
func (r *AppRepository) GetApp(id uint) (*model.App, error) {
	var app model.App
	if err := r.db.First(&app, id).Error; err != nil {
		return nil, err
	}
	return &app, nil
}

// ListFeaturedApps 获取精选应用
func (r *AppRepository) ListFeaturedApps(limit int) ([]model.App, error) {
	var apps []model.App
	if err := r.db.Where("status = 1 AND is_featured = true").Order("downloads DESC").Limit(limit).Find(&apps).Error; err != nil {
		return nil, err
	}
	return apps, nil
}

// ListNewApps 获取新上架应用
func (r *AppRepository) ListNewApps(limit int) ([]model.App, error) {
	var apps []model.App
	if err := r.db.Where("status = 1 AND is_new = true").Order("update_date DESC").Limit(limit).Find(&apps).Error; err != nil {
		return nil, err
	}
	return apps, nil
}