package pay

import (
	"context"
	"sim-server/app/main/api/internal/service"
	"sim-server/pkg/lzkit/lzUtils"
	"net/http"
	"strings"
	"time"

	"sim-server/app/main/api/internal/svc"

	"github.com/zeromicro/go-zero/core/logx"
)

type EasyPayCallbackLogic struct {
	logx.Logger
	ctx    context.Context
	svcCtx *svc.ServiceContext
}

func NewEasyPayCallbackLogic(ctx context.Context, svcCtx *svc.ServiceContext) *EasyPayCallbackLogic {
	return &EasyPayCallbackLogic{
		Logger: logx.WithContext(ctx),
		ctx:    ctx,
		svcCtx: svcCtx,
	}
}

func (l *EasyPayCallbackLogic) EasyPayCallback(w http.ResponseWriter, r *http.Request) error {
	// 检查易支付服务是否启用
	if l.svcCtx.EasyPayService == nil {
		logx.Errorf("易支付服务未启用")
		w.WriteHeader(http.StatusInternalServerError)
		return nil
	}

	notification, err := l.svcCtx.EasyPayService.HandleEasyPayNotification(r)
	if err != nil {
		logx.Errorf("易支付回调处理失败: %v", err)
		w.WriteHeader(http.StatusBadRequest)
		return nil
	}

	// 根据订单号前缀判断订单类型
	orderNo := notification.OutTradeNo
	if strings.HasPrefix(orderNo, "Q_") {
		// 查询订单处理
		return l.handleQueryOrderPayment(w, notification)
	} else if strings.HasPrefix(orderNo, "A_") {
		// 旧系统会员充值订单（已废弃，新系统使用升级功能）
		// 直接返回成功，避免旧订单影响
		w.WriteHeader(http.StatusOK)
		w.Write([]byte("success"))
		return nil
	} else if strings.HasPrefix(orderNo, "U_") {
		// 系统简化：移除升级功能，直接返回成功
		w.WriteHeader(http.StatusOK)
		w.Write([]byte("success"))
		return nil
	} else {
		// 兼容旧订单，假设没有前缀的是查询订单
		return l.handleQueryOrderPayment(w, notification)
	}
}

// 处理查询订单支付
func (l *EasyPayCallbackLogic) handleQueryOrderPayment(w http.ResponseWriter, notification *service.EasyPayNotification) error {
	order, findOrderErr := l.svcCtx.OrderModel.FindOneByOrderNo(l.ctx, notification.OutTradeNo)
	if findOrderErr != nil {
		logx.Errorf("易支付回调，查找订单失败: %+v", findOrderErr)
		w.WriteHeader(http.StatusOK)
		w.Write([]byte("success"))
		return nil
	}

	if order.Status != "pending" {
		w.WriteHeader(http.StatusOK)
		w.Write([]byte("success"))
		return nil
	}

	// 验证支付状态
	if !l.svcCtx.EasyPayService.IsPaymentSuccess(notification) {
		logx.Infof("易支付回调，订单未支付成功，订单号: %s, 状态: %s", notification.OutTradeNo, notification.TradeStatus)
		w.WriteHeader(http.StatusOK)
		w.Write([]byte("success"))
		return nil
	}

	// 验证金额（转换为字符串比较）
	amountStr := lzUtils.ToAlipayAmount(order.Amount)
	if amountStr != notification.Money {
		logx.Errorf("易支付回调，金额不一致，订单号: %s, 订单金额: %s, 回调金额: %s", notification.OutTradeNo, amountStr, notification.Money)
		w.WriteHeader(http.StatusOK)
		w.Write([]byte("success"))
		return nil
	}

	// 更新订单状态
	order.Status = "paid"
	order.PayTime = lzUtils.TimeToNullTime(time.Now())
	order.PlatformOrderId = lzUtils.StringToNullString(notification.TradeNo)

	if updateErr := l.svcCtx.OrderModel.UpdateWithVersion(l.ctx, nil, order); updateErr != nil {
		logx.Errorf("易支付回调，修改订单信息失败: %+v", updateErr)
		w.WriteHeader(http.StatusOK)
		w.Write([]byte("success"))
		return nil
	}

	// 发送异步任务处理后续流程
	if asyncErr := l.svcCtx.AsynqService.SendQueryTask(order.Id); asyncErr != nil {
		logx.Errorf("异步任务调度失败: %v", asyncErr)
		// 不返回错误，因为订单已经更新成功
	}

	// 返回success，易支付要求返回纯字符串success
	w.WriteHeader(http.StatusOK)
	w.Write([]byte("success"))
	return nil
}