package pay

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

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

	"github.com/pkg/errors"
	"github.com/wechatpay-apiv3/wechatpay-go/services/payments"
	"github.com/zeromicro/go-zero/core/logx"
	"github.com/zeromicro/go-zero/core/stores/sqlx"
)

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

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

func (l *WechatPayCallbackLogic) WechatPayCallback(w http.ResponseWriter, r *http.Request) error {
	notification, err := l.svcCtx.WechatPayService.HandleWechatPayNotification(l.ctx, r)
	if err != nil {
		logx.Errorf("微信支付回调，%v", err)
		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, "U_") {
		// 代理升级订单处理
		return l.handleAgentUpgradeOrderPayment(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）
		// return l.handleAgentVipOrderPayment(w, notification)
		// 直接返回成功，避免旧订单影响
		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 *WechatPayCallbackLogic) handleQueryOrderPayment(w http.ResponseWriter, notification *payments.Transaction) error {
	order, findOrderErr := l.svcCtx.OrderModel.FindOneByOrderNo(l.ctx, *notification.OutTradeNo)
	if findOrderErr != nil {
		logx.Errorf("微信支付回调，查找订单信息失败: %+v", findOrderErr)
		return nil
	}

	amount := lzUtils.ToWechatAmount(order.Amount)
	if amount != *notification.Amount.Total {
		logx.Errorf("微信支付回调，金额不一致")
		return nil
	}

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

	switch *notification.TradeState {
	case service.TradeStateSuccess:
		order.Status = "paid"
		order.PayTime = lzUtils.TimeToNullTime(time.Now())
	case service.TradeStateClosed:
		order.Status = "closed"
		order.CloseTime = lzUtils.TimeToNullTime(time.Now())
	case service.TradeStateRevoked:
		order.Status = "failed"
	default:
		return nil
	}

	order.PlatformOrderId = lzUtils.StringToNullString(*notification.TransactionId)
	if updateErr := l.svcCtx.OrderModel.UpdateWithVersion(l.ctx, nil, order); updateErr != nil {
		logx.Errorf("微信支付回调，更新订单失败%+v", updateErr)
		return nil
	}

	if order.Status == "paid" {
		if asyncErr := l.svcCtx.AsynqService.SendQueryTask(order.Id); asyncErr != nil {
			logx.Errorf("异步任务调度失败: %v", asyncErr)
			return asyncErr
		}
	}

	w.WriteHeader(http.StatusOK)
	_, _ = w.Write([]byte("success"))
	return nil
}

// 处理代理升级订单支付
func (l *WechatPayCallbackLogic) handleAgentUpgradeOrderPayment(w http.ResponseWriter, notification *payments.Transaction) error {
	orderNo := *notification.OutTradeNo

	// 1. 查找订单
	order, findOrderErr := l.svcCtx.OrderModel.FindOneByOrderNo(l.ctx, orderNo)
	if findOrderErr != nil {
		logx.Errorf("微信支付回调，查找升级订单失败: %+v", findOrderErr)
		return nil
	}

	// 2. 验证金额
	amount := lzUtils.ToWechatAmount(order.Amount)
	if amount != *notification.Amount.Total {
		logx.Errorf("微信支付回调，升级订单金额不一致，订单号: %s", orderNo)
		return nil
	}

	// 3. 检查订单状态
	if order.Status != "pending" {
		w.WriteHeader(http.StatusOK)
		_, _ = w.Write([]byte("success"))
		return nil
	}

	// 4. 查找升级记录
	upgradeRecords, findUpgradeErr := l.svcCtx.AgentUpgradeModel.FindAll(l.ctx, l.svcCtx.AgentUpgradeModel.SelectBuilder().
		Where("order_no = ?", orderNo).
		Limit(1), "")
	if findUpgradeErr != nil || len(upgradeRecords) == 0 {
		logx.Errorf("微信支付回调，查找升级记录失败，订单号: %s, 错误: %+v", orderNo, findUpgradeErr)
		return nil
	}
	upgradeRecord := upgradeRecords[0]

	// 5. 检查升级记录状态
	if upgradeRecord.Status != 1 {
		// 升级记录状态不是待支付，直接返回成功
		w.WriteHeader(http.StatusOK)
		_, _ = w.Write([]byte("success"))
		return nil
	}

	// 6. 处理支付状态
	switch *notification.TradeState {
	case service.TradeStateSuccess:
		order.Status = "paid"
		order.PayTime = lzUtils.TimeToNullTime(time.Now())
		order.PlatformOrderId = lzUtils.StringToNullString(*notification.TransactionId)
	case service.TradeStateClosed:
		order.Status = "closed"
		order.CloseTime = lzUtils.TimeToNullTime(time.Now())
	case service.TradeStateRevoked:
		order.Status = "failed"
	default:
		return nil
	}

	// 7. 更新订单状态
	if updateErr := l.svcCtx.OrderModel.UpdateWithVersion(l.ctx, nil, order); updateErr != nil {
		logx.Errorf("微信支付回调，更新升级订单状态失败: %+v", updateErr)
		return nil
	}

	// 8. 如果支付成功，执行升级操作
	if order.Status == "paid" {
		err := l.svcCtx.AgentWalletModel.Trans(l.ctx, func(transCtx context.Context, session sqlx.Session) error {
			// 8.1 执行升级操作
			if err := l.svcCtx.AgentService.ProcessUpgrade(transCtx, upgradeRecord.AgentId, upgradeRecord.ToLevel, upgradeRecord.UpgradeType, upgradeRecord.UpgradeFee, upgradeRecord.RebateAmount, orderNo, ""); err != nil {
				return errors.Wrapf(err, "执行升级操作失败")
			}

			// 8.2 更新升级记录状态为已完成
			upgradeRecord.Status = 2 // 已完成（status: 1=待处理，2=已完成，3=已失败）
			upgradeRecord.Remark = lzUtils.StringToNullString("支付成功，升级完成")
			if updateErr := l.svcCtx.AgentUpgradeModel.UpdateWithVersion(transCtx, session, upgradeRecord); updateErr != nil {
				return errors.Wrapf(updateErr, "更新升级记录状态失败")
			}

			return nil
		})

		if err != nil {
			logx.Errorf("微信支付回调，处理升级订单失败，订单号: %s, 错误: %+v", orderNo, err)
			// 即使升级失败，也返回成功给微信，避免重复回调
		} else {
			logx.Infof("微信支付回调，代理升级成功，订单号: %s, 代理ID: %d, 从等级 %d 升级到等级 %d", orderNo, upgradeRecord.AgentId, upgradeRecord.FromLevel, upgradeRecord.ToLevel)
		}
	}

	w.WriteHeader(http.StatusOK)
	_, _ = w.Write([]byte("success"))
	return nil
}

// 处理代理会员订单支付（已废弃，新系统使用升级功能）
/*
func (l *WechatPayCallbackLogic) handleAgentVipOrderPayment(w http.ResponseWriter, notification *payments.Transaction) error {
	agentOrder, findAgentOrderErr := l.svcCtx.AgentMembershipRechargeOrderModel.FindOneByOrderNo(l.ctx, *notification.OutTradeNo)
	if findAgentOrderErr != nil {
		logx.Errorf("微信支付回调，查找代理会员订单失败: %+v", findAgentOrderErr)
		return nil
	}

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

	user, err := l.svcCtx.UserModel.FindOne(l.ctx, agentOrder.UserId)
	if err != nil {
		logx.Errorf("微信支付回调，查找用户失败: %+v", err)
		return nil
	}

	amount := lzUtils.ToWechatAmount(agentOrder.Amount)
	if user.Inside != 1 {
		if amount != *notification.Amount.Total {
			logx.Errorf("微信支付回调，金额不一致")
			return nil
		}
	}

	switch *notification.TradeState {
	case service.TradeStateSuccess:
		agentOrder.Status = "paid"
	default:
		return nil
	}

	if agentOrder.Status == "paid" {
		err = l.svcCtx.AgentModel.Trans(l.ctx, func(transCtx context.Context, session sqlx.Session) error {
			agentModel, err := l.svcCtx.AgentModel.FindOne(transCtx, agentOrder.AgentId)
			if err != nil {
				return fmt.Errorf("查找代理信息失败: %+v", err)
			}

			agentOrder.PlatformOrderId = lzUtils.StringToNullString(*notification.TransactionId)
			if updateErr := l.svcCtx.AgentMembershipRechargeOrderModel.UpdateWithVersion(l.ctx, nil, agentOrder); updateErr != nil {
				return fmt.Errorf("修改代理会员订单信息失败: %+v", updateErr)
			}

			// 记录旧等级，用于判断是否为升级
			oldLevel := agentModel.LevelName

			// 设置会员等级
			agentModel.LevelName = agentOrder.LevelName

			// 延长会员时间
			// 检查是否是有效期内续费（不发放奖励）还是重新激活（发放奖励）
			isValidRenewal := oldLevel == agentOrder.LevelName && agentModel.MembershipExpiryTime.Valid && agentModel.MembershipExpiryTime.Time.After(time.Now())
			if isValidRenewal {
				logx.Infof("代理会员有效期内续费成功，会员ID：%d，等级：%s", agentModel.Id, agentModel.LevelName)
			} else {
				logx.Infof("代理会员新购、升级或重新激活成功，会员ID：%d，等级：%s", agentModel.Id, agentModel.LevelName)
			}
			agentModel.MembershipExpiryTime = lzUtils.RenewMembership(agentModel.MembershipExpiryTime)

			if updateErr := l.svcCtx.AgentModel.UpdateWithVersion(l.ctx, nil, agentModel); updateErr != nil {
				return fmt.Errorf("修改代理信息失败: %+v", updateErr)
			}

			// 如果不是有效期内续费，给上级代理发放升级奖励
			if !isValidRenewal && (agentOrder.LevelName == model.AgentLeveNameVIP || agentOrder.LevelName == model.AgentLeveNameSVIP) {
				// 验证升级路径的有效性
				if oldLevel != agentOrder.LevelName {
					upgradeRewardErr := l.svcCtx.AgentService.GiveUpgradeReward(transCtx, agentModel.Id, oldLevel, agentOrder.LevelName, session)
					if upgradeRewardErr != nil {
						logx.Errorf("发放升级奖励失败，代理ID：%d，旧等级：%s，新等级：%s，错误：%+v", agentModel.Id, oldLevel, agentOrder.LevelName, upgradeRewardErr)
						// 升级奖励失败不影响主流程，只记录日志
					} else {
						logx.Infof("发放升级奖励成功，代理ID：%d，旧等级：%s，新等级：%s", agentModel.Id, oldLevel, agentOrder.LevelName)
					}
				}
			}

			return nil
		})

		if err != nil {
			logx.Errorf("微信支付回调，处理代理会员订单失败: %+v", err)
			refundErr := l.handleRefund(agentOrder)
			if refundErr != nil {
				logx.Errorf("微信支付回调，退款失败: %+v", refundErr)
			}
			return nil
		}
	}

	w.WriteHeader(http.StatusOK)
	_, _ = w.Write([]byte("success"))
	return nil
}
*/

/*
func (l *WechatPayCallbackLogic) handleRefund(order *model.AgentMembershipRechargeOrder) error {
	ctx := context.Background()
	// 退款
	if order.PaymentMethod == "wechat" {
		refundErr := l.svcCtx.WechatPayService.WeChatRefund(ctx, order.OrderNo, order.Amount, order.Amount)
		if refundErr != nil {
			return refundErr
		}
	} else {
		refund, refundErr := l.svcCtx.AlipayService.AliRefund(ctx, order.OrderNo, order.Amount)
		if refundErr != nil {
			return refundErr
		}
		if refund.IsSuccess() {
			logx.Errorf("支付宝退款成功, orderID: %d", order.Id)
			// 更新订单状态为退款
			order.Status = "refunded"
			updateOrderErr := l.svcCtx.AgentMembershipRechargeOrderModel.UpdateWithVersion(ctx, nil, order)
			if updateOrderErr != nil {
				logx.Errorf("更新订单状态失败，订单ID: %d, 错误: %v", order.Id, updateOrderErr)
				return fmt.Errorf("更新订单状态失败: %v", updateOrderErr)
			}
			return nil
		} else {
			logx.Errorf("支付宝退款失败:%v", refundErr)
			return refundErr
		}
	}
	return nil
} */