package web_recharge

import (
	"context"
	"errors"
	"fmt"
	"net/http"
	"strconv"
	"time"

	"videoweb/pub/common/log"
	"videoweb/pub/common/srvdef"
	"videoweb/pub/models/vipordermod"
	"videoweb/pub/payCenter"
	"videoweb/pub/pubdef"
	srv_recharge "videoweb/web/service/srv_recharge"

	"github.com/gin-gonic/gin"
	"github.com/gin-gonic/gin/binding"
	"go.mongodb.org/mongo-driver/bson"
)

// newPayCenterCallbackDeps 将查单和入账边界集中，便于用内存替身验证回调不会错误入账。
type newPayCenterCallbackDeps struct {
	findOrder     func(context.Context, string) (*vipordermod.VipOrder, *srvdef.SrvErr)
	queryOrder    func(context.Context, string) (payCenter.QueryOrderInfo, error)
	applyRecharge func(*gin.Context, *srv_recharge.BillCallbackParam) *srvdef.SrvErr
}

// NewPayCenterRchgCallBack 接收新支付中心签名充值通知。
// @Tags 支付回调
// @Summary 新支付中心充值回调
// @Description 校验商户号、MD5签名、金额及平台订单号，查单取得支付时间后按原流程入账；重复成功通知直接应答成功。
// @Accept json
// @Produce plain
// @Param request body payCenter.RechargeCallbackResp true "支付中心签名回调"
// @Success 200 {string} string "success"
// @Failure 400 {string} string "fail"
// @Router /api/web/third/newpaycenter/recharge/callback [POST]
func NewPayCenterRchgCallBack(ctx *gin.Context) {
	deps := newPayCenterCallbackDeps{
		findOrder: func(c context.Context, tradeNo string) (*vipordermod.VipOrder, *srvdef.SrvErr) {
			return vipordermod.FindOneVipOrder(c, bson.M{vipordermod.FN.VipOrder.TradeNo: tradeNo})
		},
		queryOrder: func(c context.Context, tradeNo string) (payCenter.QueryOrderInfo, error) {
			return (&payCenter.Recharge{Ctx: c, TradeNo: tradeNo}).QueryOrder(c)
		},
		applyRecharge: srv_recharge.OnPayCenterCallback,
	}
	handleNewPayCenterRchgCallBack(ctx, deps)
}

func handleNewPayCenterRchgCallBack(ctx *gin.Context, deps newPayCenterCallbackDeps) {
	if err := processNewPayCenterRchgCallBack(ctx, deps); err != nil {
		log.Error("【/api/web/third/newpaycenter/recharge/callback】充值回调处理失败", log.E(err))
		ctx.String(http.StatusBadRequest, "fail")
		return
	}
	ctx.String(http.StatusOK, "success")
}

func processNewPayCenterRchgCallBack(ctx *gin.Context, deps newPayCenterCallbackDeps) error {
	var callback payCenter.RechargeCallbackResp
	bindErr := ctx.ShouldBindBodyWith(&callback, binding.JSON)
	bodyValue, _ := ctx.Get(gin.BodyBytesKey)
	rawBody, _ := bodyValue.([]byte)
	log.Info("【/api/web/third/newpaycenter/recharge/callback】收到充值回调",
		log.Any("tradeNo", callback.TradeNo),
		log.Any("requestBody", string(rawBody)),
		log.Any("clientIP", ctx.ClientIP()),
	)
	if bindErr != nil {
		return fmt.Errorf("回调参数解析失败: %w", bindErr)
	}
	request := &payCenter.Recharge{TradeNo: callback.TradeNo}
	if request.GetMercID() == "" || request.GetAppSecret() == "" {
		return errors.New("新支付中心回调配置缺少 mercID 或 mercSecret")
	}
	if callback.Code != http.StatusOK || callback.MercID != request.GetMercID() {
		return fmt.Errorf("回调状态或商户不匹配，tradeNo=%s", callback.TradeNo)
	}
	signSource := strconv.Itoa(callback.Code) + callback.MercID + callback.OID + callback.PayMoney + callback.TradeNo + request.GetAppSecret()
	if !payCenter.VerifySign(callback.Sign, signSource) {
		return fmt.Errorf("回调验签失败，tradeNo=%s", callback.TradeNo)
	}
	amount, err := payCenter.ParseYuanToFen(callback.PayMoney)
	if err != nil || amount <= 0 {
		return fmt.Errorf("回调金额格式错误或非正数，tradeNo=%s", callback.TradeNo)
	}
	order, serr := deps.findOrder(ctx, callback.TradeNo)
	if serr != nil {
		return fmt.Errorf("查找本地充值订单失败，tradeNo=%s: %w", callback.TradeNo, serr)
	}
	if order == nil || order.TradeNo != callback.TradeNo {
		return fmt.Errorf("本地充值订单不存在，tradeNo=%s", callback.TradeNo)
	}
	amountMismatch := amount != order.Amount
	oidMismatch := order.Oid != "" && callback.OID != order.Oid
	if amountMismatch || oidMismatch {
		log.Error("【/api/web/third/newpaycenter/recharge/callback】回调金额或支付中心订单号不匹配",
			log.Any("tradeNo", callback.TradeNo),
			log.Any("userId", order.UserId),
			log.Any("callbackPayMoneyYuan", callback.PayMoney),
			log.Any("callbackAmountFen", amount),
			log.Any("orderAmountFen", order.Amount),
			log.Any("callbackOid", callback.OID),
			log.Any("orderOid", order.Oid),
			log.Any("orderStatus", order.Status),
			log.Any("amountMismatch", amountMismatch),
			log.Any("oidMismatch", oidMismatch),
		)
		return fmt.Errorf("回调金额或支付中心订单号不匹配，tradeNo=%s", callback.TradeNo)
	}
	if order.Status == pubdef.VipOrderSuccess {
		log.Info("【/api/web/third/newpaycenter/recharge/callback】重复成功通知", log.Any("tradeNo", callback.TradeNo))
		return nil
	}
	info, err := deps.queryOrder(ctx, callback.TradeNo)
	if err != nil {
		return fmt.Errorf("支付中心查单失败，tradeNo=%s: %w", callback.TradeNo, err)
	}
	if (info.MercID != "" && info.MercID != callback.MercID) || (info.TradeNo != "" && info.TradeNo != callback.TradeNo) {
		return fmt.Errorf("支付中心查单返回了其他商户或订单，tradeNo=%s", callback.TradeNo)
	}
	paymentAt, err := time.ParseInLocation(time.RFC3339, info.PayTime, time.Local)
	if err != nil {
		return fmt.Errorf("支付中心支付时间无效，tradeNo=%s: %w", callback.TradeNo, err)
	}
	param := &srv_recharge.BillCallbackParam{
		TradeNo:    callback.TradeNo,
		Oid:        callback.OID,
		RealAmount: amount,
		PaymentAt:  paymentAt,
	}
	if serr := deps.applyRecharge(ctx, param); serr != nil {
		return fmt.Errorf("本地充值入账失败，tradeNo=%s: %w", callback.TradeNo, serr)
	}
	log.Info("【/api/web/third/newpaycenter/recharge/callback】充值入账成功", log.Any("tradeNo", callback.TradeNo), log.Any("userId", order.UserId), log.Any("amount", amount))
	return nil
}