ai_dianshang/server/internal/service/wechat_pay.go

package service

import (
	"context"
	"crypto/rsa"
	"dianshang/internal/config"
	"dianshang/internal/model"
	"dianshang/internal/repository"
	"dianshang/pkg/logger"
	"dianshang/pkg/utils"
	"encoding/json"
	"fmt"
	"log"
	"strconv"
	"time"

	"github.com/wechatpay-apiv3/wechatpay-go/core"
	"github.com/wechatpay-apiv3/wechatpay-go/core/option"
	"github.com/wechatpay-apiv3/wechatpay-go/services/payments/jsapi"
	"github.com/wechatpay-apiv3/wechatpay-go/services/payments/native"
	"github.com/wechatpay-apiv3/wechatpay-go/services/refunddomestic"
	wechatutils "github.com/wechatpay-apiv3/wechatpay-go/utils"
)

type WeChatPayService struct {
	config       *config.WeChatPayConfig
	client       *core.Client
	jsapiSvc     *jsapi.JsapiApiService
	nativeSvc    *native.NativeApiService
	refundSvc    *refunddomestic.RefundsApiService
	privateKey   *rsa.PrivateKey
	orderRepo    *repository.OrderRepository
	refundSvcRef *RefundService
}

func NewWeChatPayService(cfg *config.WeChatPayConfig, orderRepo *repository.OrderRepository, refundService *RefundService) (*WeChatPayService, error) {
	// 检查是否为沙盒环境
	if cfg.Environment == "sandbox" {
		logger.Info("微信支付配置为沙盒模式，将使用模拟支付")
		return &WeChatPayService{
			config:       cfg,
			orderRepo:    orderRepo,
			refundSvcRef: refundService,
		}, nil
	}

	// 生产环境：加载商户私钥
	privateKey, err := wechatutils.LoadPrivateKeyWithPath(cfg.KeyPath)
	if err != nil {
		logger.Warn("加载商户私钥失败，将使用模拟模式", "error", err)
		// 在开发环境下允许没有私钥，使用模拟模式
		return &WeChatPayService{
			config:       cfg,
			orderRepo:    orderRepo,
			refundSvcRef: refundService,
		}, nil
	}

	ctx := context.Background()
	// 使用商户私钥等初始化 client，并使它具有自动定时获取微信支付平台证书的能力
	opts := []core.ClientOption{
		option.WithWechatPayAutoAuthCipher(cfg.MchID, cfg.SerialNo, privateKey, cfg.APIv3Key),
	}

	client, err := core.NewClient(ctx, opts...)
	if err != nil {
		logger.Warn("初始化微信支付客户端失败，将使用模拟模式", "error", err)
		// 在开发环境下允许客户端初始化失败，使用模拟模式
		return &WeChatPayService{
			config:       cfg,
			orderRepo:    orderRepo,
			refundSvcRef: refundService,
		}, nil
	}

	// 创建JSAPI服务
	jsapiSvc := &jsapi.JsapiApiService{Client: client}
	
	// 创建Native扫码支付服务
	nativeSvc := &native.NativeApiService{Client: client}
	
	// 创建退款服务
	refundSvc := &refunddomestic.RefundsApiService{Client: client}

	logger.Info("微信支付客户端初始化成功",
		"mchId", cfg.MchID,
		"serialNo", cfg.SerialNo,
		"environment", cfg.Environment)

	return &WeChatPayService{
		config:       cfg,
		client:       client,
		jsapiSvc:     jsapiSvc,
		nativeSvc:    nativeSvc,
		refundSvc:    refundSvc,
		privateKey:   privateKey,
		orderRepo:    orderRepo,
		refundSvcRef: refundService,
	}, nil
}

// CreateOrder 创建支付订单
func (s *WeChatPayService) CreateOrder(ctx context.Context, order *model.Order, openID string) (*WeChatPayResponse, error) {
	// 生成唯一的微信支付订单号
	wechatOutTradeNo := utils.GenerateWechatOutTradeNo()
	
	logger.Info("开始创建微信支付订单",
		"orderNo", order.OrderNo,
		"wechatOutTradeNo", wechatOutTradeNo,
		"openID", openID,
		"totalAmount", order.TotalAmount,
		"hasClient", s.client != nil)

	// 更新订单的微信支付订单号
	err := s.orderRepo.UpdateByOrderNo(order.OrderNo, map[string]interface{}{
		"wechat_out_trade_no": wechatOutTradeNo,
		"updated_at":          time.Now(),
	})
	if err != nil {
		logger.Error("更新订单微信支付订单号失败", "error", err, "orderNo", order.OrderNo)
		return nil, fmt.Errorf("更新订单失败: %v", err)
	}

	// 如果没有客户端（开发环境），使用模拟数据
	if s.client == nil {
		logger.Warn("开发环境下使用模拟支付数据")
		return s.createMockPayment(order, openID)
	}

	// 构建预支付请求，使用唯一的微信支付订单号
	req := jsapi.PrepayRequest{
		Appid:       core.String(s.config.AppID),
		Mchid:       core.String(s.config.MchID),
		Description: core.String(fmt.Sprintf("订单号: %s", order.OrderNo)),
		OutTradeNo:  core.String(wechatOutTradeNo), // 使用唯一的微信支付订单号
		NotifyUrl:   core.String(s.config.NotifyURL),
		Amount: &jsapi.Amount{
			Total:    core.Int64(int64(order.TotalAmount)), // 金额已经是分为单位，无需转换
			Currency: core.String("CNY"),
		},
		Payer: &jsapi.Payer{
			Openid: core.String(openID),
		},
	}

	// 使用PrepayWithRequestPayment方法，直接获取调起支付的参数
	resp, result, err := s.jsapiSvc.PrepayWithRequestPayment(ctx, req)
	if err != nil {
		log.Printf("call PrepayWithRequestPayment err:%s", err)
		logger.Error("创建支付订单失败", "error", err, "orderNo", order.OrderNo)
		return nil, fmt.Errorf("创建支付订单失败: %v", err)
	}

	if result.Response.StatusCode != 200 {
		log.Printf("PrepayWithRequestPayment status=%d", result.Response.StatusCode)
		return nil, fmt.Errorf("预支付请求失败，状态码: %d", result.Response.StatusCode)
	}

	log.Printf("PrepayWithRequestPayment success, prepay_id=%s", *resp.PrepayId)
	logger.Info("微信支付API响应",
		"prepayId", *resp.PrepayId,
		"orderNo", order.OrderNo)

	// 直接使用SDK返回的支付参数
	payParams := &MiniProgramPayParams{
		AppID:     *resp.Appid,
		TimeStamp: *resp.TimeStamp,
		NonceStr:  *resp.NonceStr,
		Package:   *resp.Package,
		SignType:  *resp.SignType,
		PaySign:   *resp.PaySign,
	}

	return &WeChatPayResponse{
		Code:    0,
		Message: "success",
		Data: map[string]interface{}{
			"payInfo": payParams,
		},
	}, nil
}

// CreateNativeOrder 创建Native扫码支付订单（用于PC端）
func (s *WeChatPayService) CreateNativeOrder(ctx context.Context, order *model.Order) (*WeChatPayResponse, error) {
	// 生成唯一的微信支付订单号
	wechatOutTradeNo := utils.GenerateWechatOutTradeNo()
	
	logger.Info("开始创建Native扫码支付订单",
		"orderNo", order.OrderNo,
		"wechatOutTradeNo", wechatOutTradeNo,
		"totalAmount", order.TotalAmount,
		"hasClient", s.client != nil)

	// 更新订单的微信支付订单号
	err := s.orderRepo.UpdateByOrderNo(order.OrderNo, map[string]interface{}{
		"wechat_out_trade_no": wechatOutTradeNo,
		"updated_at":          time.Now(),
	})
	if err != nil {
		logger.Error("更新订单微信支付订单号失败", "error", err, "orderNo", order.OrderNo)
		return nil, fmt.Errorf("更新订单失败: %v", err)
	}

	// 如果没有客户端（开发环境），使用模拟数据
	if s.client == nil {
		logger.Warn("开发环境下使用模拟Native支付数据")
		return s.createMockNativePayment(order)
	}

	// 构建Native预支付请求
	req := native.PrepayRequest{
		Appid:       core.String(s.config.AppID),
		Mchid:       core.String(s.config.MchID),
		Description: core.String(fmt.Sprintf("订单号: %s", order.OrderNo)),
		OutTradeNo:  core.String(wechatOutTradeNo),
		NotifyUrl:   core.String(s.config.NotifyURL),
		Amount: &native.Amount{
			Total:    core.Int64(int64(order.TotalAmount)),
			Currency: core.String("CNY"),
		},
	}

	// 调用Native预支付API
	resp, result, err := s.nativeSvc.Prepay(ctx, req)
	if err != nil {
		log.Printf("call Native Prepay err:%s", err)
		logger.Error("创建Native支付订单失败", "error", err, "orderNo", order.OrderNo)
		return nil, fmt.Errorf("创建Native支付订单失败: %v", err)
	}

	if result.Response.StatusCode != 200 {
		log.Printf("Native Prepay status=%d", result.Response.StatusCode)
		return nil, fmt.Errorf("Native预支付请求失败，状态码: %d", result.Response.StatusCode)
	}

	log.Printf("Native Prepay success, code_url=%s", *resp.CodeUrl)
	logger.Info("微信Native支付API响应",
		"codeUrl", *resp.CodeUrl,
		"orderNo", order.OrderNo)

	return &WeChatPayResponse{
		Code:    0,
		Message: "success",
		Data: map[string]interface{}{
			"qrcode_url": *resp.CodeUrl,
			"order_no":   order.OrderNo,
			"amount":     order.TotalAmount,
		},
	}, nil
}

// createMockNativePayment 创建模拟Native支付数据（开发环境使用）
func (s *WeChatPayService) createMockNativePayment(order *model.Order) (*WeChatPayResponse, error) {
	// 生成模拟的二维码URL
	mockQRCodeURL := fmt.Sprintf("weixin://wxpay/bizpayurl?pr=mock_%s", utils.GenerateRandomString(10))
	
	logger.Info("生成模拟Native支付参数",
		"environment", s.config.Environment,
		"qrcodeUrl", mockQRCodeURL,
		"orderNo", order.OrderNo,
		"totalAmount", order.TotalAmount)

	return &WeChatPayResponse{
		Code:    0,
		Message: "模拟支付创建成功",
		Data: map[string]interface{}{
			"qrcode_url": mockQRCodeURL,
			"order_no":   order.OrderNo,
			"amount":     order.TotalAmount,
			"sandbox":    true,
			"tips":       "这是模拟环境的Native支付，请使用测试接口模拟支付成功",
		},
	}, nil
}

// createMockPayment 创建模拟支付数据（沙盒环境使用）
func (s *WeChatPayService) createMockPayment(order *model.Order, openID string) (*WeChatPayResponse, error) {
	mockPrepayID := fmt.Sprintf("wx%d%s", time.Now().Unix(), generateNonceStr()[:8])
	timestamp := strconv.FormatInt(time.Now().Unix(), 10)
	nonceStr := generateNonceStr()
	
	// 生成更真实的模拟签名
	mockSign := fmt.Sprintf("sandbox_%s_%s", nonceStr[:16], timestamp)
	
	payParams := &MiniProgramPayParams{
		AppID:     s.config.AppID,
		TimeStamp: timestamp,
		NonceStr:  nonceStr,
		Package:   fmt.Sprintf("prepay_id=%s", mockPrepayID),
		SignType:  "RSA",
		PaySign:   mockSign,
	}

	logger.Info("生成沙盒支付参数",
		"environment", s.config.Environment,
		"prepayId", mockPrepayID,
		"orderNo", order.OrderNo,
		"openID", openID,
		"totalAmount", order.TotalAmount,
		"description", fmt.Sprintf("订单号: %s", order.OrderNo))

	return &WeChatPayResponse{
		Code:    0,
		Message: "沙盒支付创建成功",
		Data: map[string]interface{}{
			"payInfo": payParams,
			"sandbox": true,
			"tips":    "这是沙盒环境的模拟支付，可以直接调用成功",
		},
	}, nil
}

// QueryOrder 查询订单
func (s *WeChatPayService) QueryOrder(ctx context.Context, orderNo string) (*model.Order, error) {
	logger.Info("开始查询订单", 
		"orderNo", orderNo, 
		"hasClient", s.client != nil,
		"environment", s.config.Environment)

	// 如果没有客户端（沙盒环境或开发环境），返回模拟数据
	if s.client == nil {
		if s.config.Environment == "sandbox" {
			logger.Info("沙盒环境下返回模拟查询结果")
		} else {
			logger.Warn("开发环境下返回模拟查询结果")
		}
		
		// 模拟不同的支付状态，让测试更真实
		var status int
		if time.Now().Unix()%3 == 0 {
			status = 1 // 未付款
		} else {
			status = 2 // 已付款
		}
		
		return &model.Order{
			OrderNo:     orderNo,
			TotalAmount: 100.0, // 模拟金额
			Status:      status,
		}, nil
	}

	// 首先从数据库获取订单信息
	order, err := s.orderRepo.GetByOrderNo(orderNo)
	if err != nil {
		logger.Error("从数据库获取订单失败", "error", err, "orderNo", orderNo)
		return nil, fmt.Errorf("订单不存在: %v", err)
	}

	// 如果没有微信支付订单号，说明还没有创建过微信支付订单
	if order.WechatOutTradeNo == "" {
		logger.Warn("订单尚未创建微信支付订单", "orderNo", orderNo)
		return order, nil
	}

	// 使用微信支付订单号查询微信支付状态
	req := jsapi.QueryOrderByOutTradeNoRequest{
		OutTradeNo: core.String(order.WechatOutTradeNo),
		Mchid:      core.String(s.config.MchID),
	}

	resp, result, err := s.jsapiSvc.QueryOrderByOutTradeNo(ctx, req)
	if err != nil {
		log.Printf("call QueryOrderByOutTradeNo err:%s", err)
		logger.Error("查询微信支付订单失败", "error", err, "wechatOutTradeNo", order.WechatOutTradeNo)
		return nil, fmt.Errorf("查询微信支付订单失败: %v", err)
	}

	if result.Response.StatusCode != 200 {
		log.Printf("QueryOrderByOutTradeNo status=%d", result.Response.StatusCode)
		return nil, fmt.Errorf("查询微信支付订单失败，状态码: %d", result.Response.StatusCode)
	}

	log.Printf("QueryOrderByOutTradeNo success, resp=%+v", resp)
	logger.Info("查询微信支付订单成功",
		"orderNo", orderNo,
		"wechatOutTradeNo", order.WechatOutTradeNo,
		"tradeState", *resp.TradeState)

	// 更新订单的微信交易号和支付状态
	wechatStatus := convertWeChatPayStatus(*resp.TradeState)
	updates := map[string]interface{}{
		"updated_at": time.Now(),
	}

	// 如果有微信交易号，保存到数据库
	if resp.TransactionId != nil {
		updates["wechat_transaction_id"] = *resp.TransactionId
	}

	// 如果微信支付状态是已支付，更新订单状态
	if wechatStatus == 2 && order.Status == 1 {
		updates["status"] = 2
		updates["pay_status"] = 1
		updates["paid_at"] = time.Now()
	}

	// 更新订单信息
	if len(updates) > 1 { // 除了updated_at还有其他字段需要更新
		err = s.orderRepo.UpdateByOrderNo(orderNo, updates)
		if err != nil {
			logger.Error("更新订单微信支付信息失败", "error", err, "orderNo", orderNo)
		}
	}

	// 更新订单对象的状态和金额信息
	order.TotalAmount = float64(*resp.Amount.Total) // 保持分为单位，与系统内部一致
	order.Status = wechatStatus
	if resp.TransactionId != nil {
		order.WechatTransactionID = *resp.TransactionId
	}

	return order, nil
}

// HandleNotify 处理支付回调
func (s *WeChatPayService) HandleNotify(ctx context.Context, body []byte, headers map[string]string) (*WeChatPayNotify, error) {
	// 解析回调数据
	var notify WeChatPayNotify
	if err := json.Unmarshal(body, &notify); err != nil {
		return nil, fmt.Errorf("解析回调数据失败: %v", err)
	}

	logger.Info("收到微信支付回调", 
		"eventType", notify.EventType,
		"id", notify.ID,
		"algorithm", notify.Resource.Algorithm)

	// 解密resource中的数据
	if notify.Resource.Ciphertext != "" {
		// 使用AEAD_AES_256_GCM算法解密
		decryptedData, err := s.decryptNotifyResource(
			notify.Resource.Ciphertext,
			notify.Resource.Nonce,
			notify.Resource.AssociatedData,
		)
		if err != nil {
			logger.Error("解密回调数据失败", "error", err)
			return nil, fmt.Errorf("解密回调数据失败: %v", err)
		}

		// 解析解密后的JSON数据
		var paymentData WeChatPayNotifyData
		if err := json.Unmarshal(decryptedData, &paymentData); err != nil {
			logger.Error("解析解密数据失败", "error", err, "data", string(decryptedData))
			return nil, fmt.Errorf("解析解密数据失败: %v", err)
		}

		notify.DecryptedData = &paymentData
		logger.Info("成功解密回调数据", 
			"outTradeNo", paymentData.OutTradeNo,
			"transactionID", paymentData.TransactionID,
			"tradeState", paymentData.TradeState)
	}

	return &notify, nil
}

// decryptNotifyResource 解密回调通知中的resource数据
func (s *WeChatPayService) decryptNotifyResource(ciphertext, nonce, associatedData string) ([]byte, error) {
	// 使用wechatpay-go SDK提供的解密工具
	plaintext, err := wechatutils.DecryptAES256GCM(s.config.APIv3Key, associatedData, nonce, ciphertext)
	if err != nil {
		return nil, fmt.Errorf("AES解密失败: %v", err)
	}
	return []byte(plaintext), nil
}

// ProcessPaymentSuccess 处理支付成功回调
func (s *WeChatPayService) ProcessPaymentSuccess(ctx context.Context, notify *WeChatPayNotify) error {
	if notify.EventType != "TRANSACTION.SUCCESS" {
		return fmt.Errorf("不是支付成功回调: %s", notify.EventType)
	}

	logger.Info("开始处理支付成功回调", "eventType", notify.EventType)

	// 解析回调数据中的订单信息
	var orderNo string
	var transactionID string
	
	// 如果有解密数据，从中获取订单号
	if notify.DecryptedData != nil {
		orderNo = notify.DecryptedData.OutTradeNo
		transactionID = notify.DecryptedData.TransactionID
		logger.Info("从解密数据中获取订单信息", "orderNo", orderNo, "transactionID", transactionID)
	} else {
		// 开发环境下，可能需要从Resource字段中解析
		// 或者从其他地方获取订单号
		logger.Warn("回调数据中没有解密数据，尝试从Resource字段获取")
		
		// 在开发环境下，我们可以尝试解析Resource中的数据
		if notify.Resource.Ciphertext != "" {
			// 这里可以添加解密逻辑，但在开发环境下我们先跳过
			logger.Info("Resource中有加密数据，但开发环境暂不解密")
		}
		
		// 如果无法获取订单号，我们可以从最近的订单中查找
		// 这是一个临时的开发环境解决方案
		logger.Warn("无法从回调数据中获取订单号，这可能是开发环境的模拟回调")
		return fmt.Errorf("无法从回调数据中获取订单号")
	}

	if orderNo == "" {
		return fmt.Errorf("回调数据中缺少订单号")
	}

	logger.Info("处理支付成功回调", "orderNo", orderNo)

	// 查询订单
	order, err := s.orderRepo.GetOrderByWechatOutTradeNo(orderNo)
	if err != nil {
		logger.Error("根据微信订单号查询订单失败", "error", err, "wechatOutTradeNo", orderNo)
		return fmt.Errorf("订单不存在: %v", err)
	}

	// 检查订单状态，避免重复处理
	if order.Status >= 2 {
		logger.Info("订单已经是已支付状态，跳过处理", "orderNo", order.OrderNo, "status", order.Status)
		return nil
	}

	logger.Info("开始更新订单状态", "orderNo", order.OrderNo, "currentStatus", order.Status)

	// 更新订单状态为已支付
	updates := map[string]interface{}{
		"status":     2, // 已支付
		"pay_status": 1, // 已支付
		"pay_time":   time.Now(),
		"updated_at": time.Now(),
	}

	// 如果有微信交易号，也保存
	if transactionID != "" {
		updates["wechat_transaction_id"] = transactionID
		logger.Info("保存微信交易号", "transactionID", transactionID)
	}

	err = s.orderRepo.UpdateByOrderNo(order.OrderNo, updates)
	if err != nil {
		logger.Error("更新订单支付状态失败", "error", err, "orderNo", order.OrderNo)
		return fmt.Errorf("更新订单状态失败: %v", err)
	}

	logger.Info("订单支付状态更新成功", "orderNo", order.OrderNo, "newStatus", 2)
	return nil
}

// ProcessPaymentSuccessByOrderNo 根据订单号手动处理支付成功（用于测试）
func (s *WeChatPayService) ProcessPaymentSuccessByOrderNo(ctx context.Context, orderNo string) error {
	logger.Info("手动处理支付成功", "orderNo", orderNo)

	// 查询订单
	order, err := s.orderRepo.GetByOrderNo(orderNo)
	if err != nil {
		logger.Error("查询订单失败", "error", err, "orderNo", orderNo)
		return fmt.Errorf("订单不存在: %v", err)
	}

	// 检查订单状态，避免重复处理
	if order.Status >= 2 {
		logger.Info("订单已经是已支付状态，跳过处理", "orderNo", order.OrderNo, "status", order.Status)
		return nil
	}

	logger.Info("开始更新订单状态", "orderNo", order.OrderNo, "currentStatus", order.Status)

	// 更新订单状态为已支付
	updates := map[string]interface{}{
		"status":     2, // 已支付
		"pay_status": 1, // 已支付
		"pay_time":   time.Now(),
		"updated_at": time.Now(),
	}

	err = s.orderRepo.UpdateByOrderNo(order.OrderNo, updates)
	if err != nil {
		logger.Error("更新订单支付状态失败", "error", err, "orderNo", order.OrderNo)
		return fmt.Errorf("更新订单状态失败: %v", err)
	}

	logger.Info("订单支付状态更新成功", "orderNo", order.OrderNo, "newStatus", 2)
	return nil
}



// CreateRefund 创建微信退款
func (s *WeChatPayService) CreateRefund(ctx context.Context, refundRecord *model.Refund, order *model.Order) (*WeChatRefundResponse, error) {
	logger.Info("开始创建微信退款",
		"refundNo", refundRecord.RefundNo,
		"orderNo", order.OrderNo,
		"refundAmount", refundRecord.RefundAmount,
		"hasClient", s.client != nil)

	// 如果没有客户端（开发环境），使用模拟数据
	if s.client == nil {
		logger.Warn("开发环境下使用模拟退款数据")
		return s.createMockRefund(refundRecord, order)
	}

	// 构建退款请求
	req := refunddomestic.CreateRequest{
		OutTradeNo:   core.String(order.WechatOutTradeNo),
		OutRefundNo:  core.String(refundRecord.WechatOutRefundNo),
		Reason:       core.String(refundRecord.RefundReason),
		FundsAccount: (*refunddomestic.ReqFundsAccount)(core.String("AVAILABLE")), // 可用余额退款
		Amount: &refunddomestic.AmountReq{
			Refund:   core.Int64(int64(refundRecord.RefundAmount)),
			Total:    core.Int64(int64(order.TotalAmount)),
			Currency: core.String("CNY"),
		},
	}

	// 只有当RefundNotifyURL不为空时才设置NotifyUrl
	if s.config.RefundNotifyURL != "" {
		req.NotifyUrl = core.String(s.config.RefundNotifyURL)
	}

	// 如果有微信交易号，优先使用
	if order.WechatTransactionID != "" {
		req.TransactionId = core.String(order.WechatTransactionID)
		req.OutTradeNo = nil // 使用微信交易号时，不需要商户订单号
	}

	// 调用微信退款API
	resp, result, err := s.refundSvc.Create(ctx, req)
	if err != nil {
		log.Printf("call CreateRefund err:%s", err)
		logger.Error("创建微信退款失败", "error", err, "refundNo", refundRecord.RefundNo)
		return nil, fmt.Errorf("创建微信退款失败: %v", err)
	}

	if result.Response.StatusCode != 200 {
		log.Printf("CreateRefund status=%d", result.Response.StatusCode)
		return nil, fmt.Errorf("微信退款请求失败，状态码: %d", result.Response.StatusCode)
	}

	log.Printf("CreateRefund success, refund_id=%s", *resp.RefundId)
	logger.Info("微信退款API响应",
		"refundId", *resp.RefundId,
		"refundNo", refundRecord.RefundNo,
		"status", *resp.Status)

	return &WeChatRefundResponse{
		Code:    0,
		Message: "success",
		Data: map[string]interface{}{
			"refund_id":        *resp.RefundId,
			"out_refund_no":    *resp.OutRefundNo,
			"transaction_id":   getStringValue(resp.TransactionId),
			"out_trade_no":     getStringValue(resp.OutTradeNo),
			"channel":          getChannelValue(resp.Channel),
			"user_received_account": getStringValue(resp.UserReceivedAccount),
			"success_time":     getTimeValue(resp.SuccessTime),
			"create_time":      getTimeValue(resp.CreateTime),
			"status":           getStatusValue(*resp.Status),
			"funds_account":    getFundsAccountValue(resp.FundsAccount),
			"amount": map[string]interface{}{
				"total":            *resp.Amount.Total,
				"refund":           *resp.Amount.Refund,
				"payer_total":      getInt64Value(resp.Amount.PayerTotal),
				"payer_refund":     getInt64Value(resp.Amount.PayerRefund),
				"settlement_refund": getInt64Value(resp.Amount.SettlementRefund),
				"settlement_total":  getInt64Value(resp.Amount.SettlementTotal),
				"discount_refund":   getInt64Value(resp.Amount.DiscountRefund),
				"currency":         *resp.Amount.Currency,
			},
		},
	}, nil
}

// createMockRefund 创建模拟退款数据（开发环境使用）
func (s *WeChatPayService) createMockRefund(refundRecord *model.Refund, order *model.Order) (*WeChatRefundResponse, error) {
	logger.Info("创建模拟退款数据", "refundNo", refundRecord.RefundNo)

	// 生成模拟的微信退款ID
	mockRefundID := fmt.Sprintf("mock_refund_%d", time.Now().Unix())

	return &WeChatRefundResponse{
		Code:    0,
		Message: "success",
		Data: map[string]interface{}{
			"refund_id":        mockRefundID,
			"out_refund_no":    refundRecord.WechatOutRefundNo,
			"transaction_id":   order.WechatTransactionID,
			"out_trade_no":     order.WechatOutTradeNo,
			"channel":          "ORIGINAL",
			"user_received_account": "招商银行信用卡0403",
			"success_time":     time.Now().Format("2006-01-02T15:04:05+08:00"),
			"create_time":      time.Now().Format("2006-01-02T15:04:05+08:00"),
			"status":           "SUCCESS",
			"funds_account":    "AVAILABLE",
			"amount": map[string]interface{}{
				"total":            int64(order.TotalAmount),
				"refund":           int64(refundRecord.RefundAmount),
				"payer_total":      int64(order.TotalAmount),
				"payer_refund":     int64(refundRecord.RefundAmount),
				"settlement_refund": int64(refundRecord.RefundAmount),
				"settlement_total":  int64(order.TotalAmount),
				"discount_refund":   int64(0),
				"currency":         "CNY",
			},
		},
	}, nil
}

// QueryRefund 查询微信退款状态
func (s *WeChatPayService) QueryRefund(ctx context.Context, outRefundNo string) (*model.Refund, error) {
	logger.Info("查询微信退款状态", "outRefundNo", outRefundNo)

	// 如果没有客户端（开发环境），返回模拟数据
	if s.client == nil {
		logger.Warn("开发环境下使用模拟退款查询")
		return s.queryMockRefund(outRefundNo)
	}

	// 构建查询请求
	req := refunddomestic.QueryByOutRefundNoRequest{
		OutRefundNo: core.String(outRefundNo),
	}

	// 调用微信查询退款API
	resp, result, err := s.refundSvc.QueryByOutRefundNo(ctx, req)
	if err != nil {
		log.Printf("call QueryRefund err:%s", err)
		logger.Error("查询微信退款失败", "error", err, "outRefundNo", outRefundNo)
		return nil, fmt.Errorf("查询微信退款失败: %v", err)
	}

	if result.Response.StatusCode != 200 {
		log.Printf("QueryRefund status=%d", result.Response.StatusCode)
		return nil, fmt.Errorf("查询微信退款失败，状态码: %d", result.Response.StatusCode)
	}

	log.Printf("QueryRefund success, resp=%+v", resp)
	logger.Info("查询微信退款成功",
		"outRefundNo", outRefundNo,
		"refundId", *resp.RefundId,
		"status", *resp.Status)

	// 构建返回的退款记录（这里只是示例，实际应该从数据库获取完整记录）
	refundRecord := &model.Refund{
		WechatRefundID:           *resp.RefundId,
		WechatOutRefundNo:        *resp.OutRefundNo,
		WechatRefundStatus:       getStatusValue(*resp.Status),
		WechatUserReceivedAccount: getStringValue(resp.UserReceivedAccount),
		WechatRefundAccount:      getFundsAccountValue(resp.FundsAccount),
	}

	// 如果退款成功，设置成功时间
	if getStatusValue(*resp.Status) == "SUCCESS" && resp.SuccessTime != nil {
		successTime, err := time.Parse("2006-01-02T15:04:05+08:00", getTimeValue(resp.SuccessTime))
		if err == nil {
			refundRecord.WechatSuccessTime = &successTime
		}
	}

	return refundRecord, nil
}

// queryMockRefund 查询模拟退款数据（开发环境使用）
func (s *WeChatPayService) queryMockRefund(outRefundNo string) (*model.Refund, error) {
	logger.Info("查询模拟退款数据", "outRefundNo", outRefundNo)

	now := time.Now()
	return &model.Refund{
		WechatRefundID:           fmt.Sprintf("mock_refund_%d", now.Unix()),
		WechatOutRefundNo:        outRefundNo,
		WechatRefundStatus:       "SUCCESS",
		WechatUserReceivedAccount: "招商银行信用卡0403",
		WechatRefundAccount:      "AVAILABLE",
		WechatSuccessTime:        &now,
	}, nil
}

// HandleRefundNotify 处理微信退款回调
func (s *WeChatPayService) HandleRefundNotify(ctx context.Context, body []byte, headers map[string]string) (*WeChatRefundNotify, error) {
	// 解析回调数据
	var notify WeChatRefundNotify
	if err := json.Unmarshal(body, &notify); err != nil {
		return nil, fmt.Errorf("解析退款回调数据失败: %v", err)
	}

	logger.Info("收到微信退款回调", 
		"eventType", notify.EventType,
		"id", notify.ID,
		"algorithm", notify.Resource.Algorithm)

	// 解密resource中的数据
	if notify.Resource.Ciphertext != "" {
		// 使用AEAD_AES_256_GCM算法解密
		decryptedData, err := s.decryptNotifyResource(
			notify.Resource.Ciphertext,
			notify.Resource.Nonce,
			notify.Resource.AssociatedData,
		)
		if err != nil {
			logger.Error("解密退款回调数据失败", "error", err)
			return nil, fmt.Errorf("解密退款回调数据失败: %v", err)
		}

		// 解析解密后的JSON数据
		var refundData WeChatRefundNotifyData
		if err := json.Unmarshal(decryptedData, &refundData); err != nil {
			logger.Error("解析解密数据失败", "error", err, "data", string(decryptedData))
			return nil, fmt.Errorf("解析解密数据失败: %v", err)
		}

		notify.DecryptedData = &refundData
		logger.Info("成功解密退款回调数据", 
			"outRefundNo", refundData.OutRefundNo,
			"refundId", refundData.RefundId,
			"refundStatus", refundData.RefundStatus)
	}

	return &notify, nil
}

// ProcessRefundSuccess 处理退款成功回调
func (s *WeChatPayService) ProcessRefundSuccess(ctx context.Context, notify *WeChatRefundNotify) error {
	if notify.EventType != "REFUND.SUCCESS" {
		return fmt.Errorf("不是退款成功回调: %s", notify.EventType)
	}

	logger.Info("开始处理退款成功回调", "eventType", notify.EventType)

	// 解析回调数据中的退款信息
	var outRefundNo string
	var refundID string
	
	// 如果有解密数据，从中获取退款单号
	if notify.DecryptedData != nil {
		outRefundNo = notify.DecryptedData.OutRefundNo
		refundID = notify.DecryptedData.RefundId
		logger.Info("从解密数据中获取退款信息", "outRefundNo", outRefundNo, "refundId", refundID)
	} else {
		logger.Warn("退款回调数据中没有解密数据")
		return fmt.Errorf("无法从回调数据中获取退款单号")
	}

	if outRefundNo == "" {
		return fmt.Errorf("回调数据中缺少退款单号")
	}

	logger.Info("处理退款成功回调", "outRefundNo", outRefundNo)

	// 这里应该调用退款服务来更新退款状态
	// 由于这是在微信支付服务中，我们只记录日志，实际更新由退款服务处理
	logger.Info("退款成功回调处理完成", "outRefundNo", outRefundNo, "refundId", refundID)
	
	return nil
}

// 辅助函数
func getStringValue(ptr *string) string {
	if ptr == nil {
		return ""
	}
	return *ptr
}

func getInt64Value(ptr *int64) int64 {
	if ptr == nil {
		return 0
	}
	return *ptr
}

func getChannelValue(ptr *refunddomestic.Channel) string {
	if ptr == nil {
		return ""
	}
	return string(*ptr)
}

func getFundsAccountValue(ptr *refunddomestic.FundsAccount) string {
	if ptr == nil {
		return ""
	}
	return string(*ptr)
}

func getTimeValue(ptr *time.Time) string {
	if ptr == nil {
		return ""
	}
	return ptr.Format("2006-01-02T15:04:05+08:00")
}

func getStatusValue(status refunddomestic.Status) string {
	return string(status)
}

// generateNonceStr 生成随机字符串用于微信支付
func generateNonceStr() string {
	return utils.GenerateRandomString(32)
}

// convertWeChatPayStatus 将微信支付状态转换为订单状态
func convertWeChatPayStatus(wechatStatus string) int {
	switch wechatStatus {
	case "SUCCESS":
		return model.OrderStatusPaid
	case "REFUND":
		return model.OrderStatusRefunded
	case "NOTPAY":
		return model.OrderStatusPending
	case "CLOSED":
		return model.OrderStatusCancelled
	case "REVOKED":
		return model.OrderStatusCancelled
	case "USERPAYING":
		return model.OrderStatusPending
	case "PAYERROR":
		return model.OrderStatusCancelled
	default:
		return model.OrderStatusPending
	}
}

// 微信支付相关数据结构
type MiniProgramPayParams struct {
	AppID     string `json:"appId"`
	TimeStamp string `json:"timeStamp"`
	NonceStr  string `json:"nonceStr"`
	Package   string `json:"package"`
	SignType  string `json:"signType"`
	PaySign   string `json:"paySign"`
}

type WeChatPayResponse struct {
	Code    int                    `json:"code"`
	Message string                 `json:"message"`
	Data    map[string]interface{} `json:"data"`
}

type WeChatPayNotify struct {
	ID           string `json:"id"`
	CreateTime   string `json:"create_time"`
	ResourceType string `json:"resource_type"`
	EventType    string `json:"event_type"`
	Summary      string `json:"summary"`
	Resource     struct {
		OriginalType   string `json:"original_type"`
		Algorithm      string `json:"algorithm"`
		Ciphertext     string `json:"ciphertext"`
		AssociatedData string `json:"associated_data"`
		Nonce          string `json:"nonce"`
	} `json:"resource"`
	DecryptedData *WeChatPayNotifyData `json:"decrypted_data,omitempty"`
}

type WeChatPayNotifyData struct {
	MchID         string `json:"mchid"`
	AppID         string `json:"appid"`
	OutTradeNo    string `json:"out_trade_no"`
	TransactionID string `json:"transaction_id"`
	TradeType     string `json:"trade_type"`
	TradeState    string `json:"trade_state"`
	BankType      string `json:"bank_type"`
	SuccessTime   string `json:"success_time"`
	Payer         struct {
		OpenID string `json:"openid"`
	} `json:"payer"`
	Amount struct {
		Total         int    `json:"total"`
		PayerTotal    int    `json:"payer_total"`
		Currency      string `json:"currency"`
		PayerCurrency string `json:"payer_currency"`
	} `json:"amount"`
}

type WeChatRefundResponse struct {
	Code    int                    `json:"code"`
	Message string                 `json:"message"`
	Data    map[string]interface{} `json:"data"`
}

type WeChatRefundNotify struct {
	ID           string `json:"id"`
	CreateTime   string `json:"create_time"`
	ResourceType string `json:"resource_type"`
	EventType    string `json:"event_type"`
	Summary      string `json:"summary"`
	Resource     struct {
		OriginalType   string `json:"original_type"`
		Algorithm      string `json:"algorithm"`
		Ciphertext     string `json:"ciphertext"`
		AssociatedData string `json:"associated_data"`
		Nonce          string `json:"nonce"`
	} `json:"resource"`
	DecryptedData *WeChatRefundNotifyData `json:"decrypted_data,omitempty"`
}

type WeChatRefundNotifyData struct {
	MchID               string `json:"mchid"`
	OutTradeNo          string `json:"out_trade_no"`
	TransactionID       string `json:"transaction_id"`
	OutRefundNo         string `json:"out_refund_no"`
	RefundId            string `json:"refund_id"`
	RefundStatus        string `json:"refund_status"`
	SuccessTime         string `json:"success_time"`
	UserReceivedAccount string `json:"user_received_account"`
	Amount              struct {
		Total       int `json:"total"`
		Refund      int `json:"refund"`
		PayerTotal  int `json:"payer_total"`
		PayerRefund int `json:"payer_refund"`
	} `json:"amount"`
}