package service

import (
	"photowall/internal/model"

	"gorm.io/gorm"
)

type ConfigService struct {
	db *gorm.DB
}

func NewConfigService(db *gorm.DB) *ConfigService {
	return &ConfigService{db: db}
}

// defaultConfigs 所有可配置项及说明
var defaultConfigs = []model.SystemConfig{
	// ===== 基础配置 =====
	{Key: "site_name", Value: "PhotoWall 毕业照墙", Label: "站点名称", Description: "显示在浏览器标题和登录页的站点名称", Category: "basic", Placeholder: "PhotoWall 毕业照墙", Sort: 1},
	{Key: "jwt_secret", Value: "photowall-dev-secret-change-in-prod", Label: "JWT 密钥", Description: "用于签发和验证登录Token，生产环境务必修改为随机字符串", Category: "basic", Placeholder: "随机字符串至少32位", Sort: 2},
	{Key: "jwt_expire_hours", Value: "3", Label: "登录有效期(小时)", Description: "用户登录后Token的有效时长，超时需重新登录", Category: "basic", Placeholder: "3", Sort: 3},
	{Key: "audit_grace_days", Value: "30", Label: "审核补齐期限(天)", Description: "班级被打回后，超过该天数未补齐则自动删除", Category: "basic", Placeholder: "30", Sort: 4},

	// ===== 极验行为验证 =====
	{Key: "geetest_id", Value: "", Label: "极验 ID", Description: "极验行为验证的Captcha ID，用于防机器人和暴力破解", Category: "geetest", Placeholder: "如：64a####################", DocLink: "https://www.geetest.com 注册后在应用管理获取", Sort: 1},
	{Key: "geetest_key", Value: "", Label: "极验 Key", Description: "极验行为验证的私钥，与ID配对使用", Category: "geetest", Placeholder: "如：64a####################", DocLink: "https://www.geetest.com 注册后在应用管理获取", Sort: 2},

	// ===== 短信验证码 =====
	{Key: "sms_provider", Value: "aliyun", Label: "短信服务商", Description: "选择短信服务商，目前支持阿里云和腾讯云", Category: "sms", Placeholder: "aliyun 或 tencent", DocLink: "阿里云: https://dysms.console.aliyun.com | 腾讯云: https://console.cloud.tencent.com/sms", Sort: 1},
	{Key: "sms_access_key", Value: "", Label: "短信 AccessKey", Description: "短信服务商的访问密钥ID", Category: "sms", Placeholder: "如：LTAI5t################", DocLink: "阿里云: https://ram.console.aliyun.com | 腾讯云: https://console.cloud.tencent.com/cam", Sort: 2},
	{Key: "sms_secret_key", Value: "", Label: "短信 SecretKey", Description: "短信服务商的访问密钥密码", Category: "sms", Placeholder: "如：########################", DocLink: "与AccessKey在同一页面获取", Sort: 3},
	{Key: "sms_sign_name", Value: "", Label: "短信签名", Description: "短信签名，需在短信服务商审核通过，如：PhotoWall", Category: "sms", Placeholder: "如：PhotoWall", DocLink: "在短信服务商控制台的国内消息-签名管理中申请", Sort: 4},
	{Key: "sms_template_code", Value: "", Label: "短信模板CODE", Description: "短信模板编码，需在短信服务商审核通过，模板内容需包含验证码变量", Category: "sms", Placeholder: "如：SMS_123456789", DocLink: "在短信服务商控制台的国内消息-模板管理中申请", Sort: 5},

	// ===== 微信扫码登录 =====
	{Key: "wechat_app_id", Value: "", Label: "微信 AppID", Description: "微信开放平台应用的AppID，用于扫码登录", Category: "wechat", Placeholder: "如：wx################", DocLink: "https://open.weixin.qq.com 注册开发者账号并创建网站应用", Sort: 1},
	{Key: "wechat_app_secret", Value: "", Label: "微信 AppSecret", Description: "微信开放平台应用的密钥，与AppID配对", Category: "wechat", Placeholder: "如：########################", DocLink: "在微信开放平台应用详情中查看", Sort: 2},
	{Key: "wechat_redirect_uri", Value: "", Label: "微信回调地址", Description: "微信授权后的回调URL，需与开放平台配置一致，需HTTPS", Category: "wechat", Placeholder: "如：https://yourdomain.com/api/auth/wechat/callback", DocLink: "在微信开放平台应用的网站应用-授权回调域中配置", Sort: 3},

	// ===== 存储配置 =====
	{Key: "upload_dir", Value: "uploads", Label: "上传目录", Description: "图片文件存储的相对路径", Category: "storage", Placeholder: "uploads", Sort: 1},
	{Key: "max_file_size_mb", Value: "10", Label: "单文件大小上限(MB)", Description: "上传图片的最大大小限制", Category: "storage", Placeholder: "10", Sort: 2},
}

// InitDefaults 初始化默认配置（不存在则创建）
func (s *ConfigService) InitDefaults() error {
	for _, c := range defaultConfigs {
		var count int64
		s.db.Model(&model.SystemConfig{}).Where("`key` = ?", c.Key).Count(&count)
		if count == 0 {
			if err := s.db.Create(&c).Error; err != nil {
				return err
			}
		}
	}
	return nil
}

// GetAll 获取所有配置（按分类和排序）
func (s *ConfigService) GetAll() ([]model.SystemConfig, error) {
	var list []model.SystemConfig
	err := s.db.Order("category, sort").Find(&list).Error
	return list, err
}

// GetByCategory 按分类获取配置
func (s *ConfigService) GetByCategory(category string) ([]model.SystemConfig, error) {
	var list []model.SystemConfig
	err := s.db.Where("category = ?", category).Order("sort").Find(&list).Error
	return list, err
}

// UpdateReq 更新配置请求
type UpdateConfigReq struct {
	Configs map[string]string `json:"configs" binding:"required"`
}

// Update 批量更新配置
func (s *ConfigService) Update(req *UpdateConfigReq) error {
	return s.db.Transaction(func(tx *gorm.DB) error {
		for key, value := range req.Configs {
			if err := tx.Model(&model.SystemConfig{}).Where("`key` = ?", key).Update("value", value).Error; err != nil {
				return err
			}
		}
		return nil
	})
}

// GetValue 获取单个配置值
func (s *ConfigService) GetValue(key string) string {
	var c model.SystemConfig
	if err := s.db.Where("`key` = ?", key).First(&c).Error; err != nil {
		return ""
	}
	return c.Value
}