package handler

import (
	"encoding/json"
	"fmt"
	"math"
	"net/http"
	"strconv"
	"strings"
	"time"
	"unicode/utf8"

	"soul-api/internal/database"
	"soul-api/internal/model"
	"soul-api/internal/wechat"

	"github.com/gin-gonic/gin"
	"gorm.io/gorm"
)

const giftPayExpireHours = 24
const wechatAttachMaxBytes = 128

// truncateStr 截断字符串至最多 n 字节（UTF-8 安全）
func truncateStr(s string, n int) string {
	b := []byte(s)
	if len(b) <= n {
		return s
	}
	b = b[:n]
	for len(b) > 0 && b[len(b)-1] >= 0x80 {
		b = b[:len(b)-1]
	}
	return string(b)
}

// giftPayPreviewContent 取内容前 20%，用于代付页营销展示
func giftPayPreviewContent(content string) string {
	n := utf8.RuneCountInString(content)
	if n == 0 {
		return ""
	}
	limit := n * 20 / 100
	if limit < 50 {
		limit = 50
	}
	if limit > n {
		limit = n
	}
	runes := []rune(content)
	if limit >= n {
		return string(runes)
	}
	return string(runes[:limit]) + "……"
}

// GiftPayCreate POST /api/miniprogram/gift-pay/create 创建代付请求（改造后：发起人支付，好友领取）
func GiftPayCreate(c *gin.Context) {
	var req struct {
		UserID      string `json:"userId" binding:"required"`
		ProductType string `json:"productType" binding:"required"`
		ProductID   string `json:"productId"`
		Quantity    int    `json:"quantity"`
	}
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusOK, gin.H{"success": false, "error": "缺少参数"})
		return
	}
	quantity := req.Quantity
	if quantity < 1 {
		c.JSON(http.StatusOK, gin.H{"success": false, "error": "发放份数须为正整数"})
		return
	}
	db := database.DB()

	// 校验发起人
	var initiator model.User
	if err := db.Where("id = ?", req.UserID).First(&initiator).Error; err != nil {
		c.JSON(http.StatusOK, gin.H{"success": false, "error": "用户不存在"})
		return
	}

	// 价格与商品校验
	productID := req.ProductID
	if productID == "" {
		switch req.ProductType {
		case "vip":
			productID = "vip_annual"
		case "match":
			productID = "match"
		case "fullbook":
			productID = "fullbook"
		}
	}
	unitPrice, priceErr := getStandardPrice(db, req.ProductType, productID)
	if priceErr != nil {
		c.JSON(http.StatusOK, gin.H{"success": false, "error": priceErr.Error()})
		return
	}
	amount := unitPrice * float64(quantity)
	if amount < 0.01 {
		amount = 0.01
	}
	// 发起人若有推荐人绑定，享受好友优惠
	var referrerID *string
	var binding struct {
		ReferrerID string `gorm:"column:referrer_id"`
	}
	if err := db.Raw(`
		SELECT referrer_id FROM referral_bindings
		WHERE referee_id = ? AND status = 'active' AND expiry_date > NOW()
		ORDER BY binding_date DESC LIMIT 1
	`, req.UserID).Scan(&binding).Error; err == nil && binding.ReferrerID != "" {
		referrerID = &binding.ReferrerID
		var cfg model.SystemConfig
		if err := db.Where("config_key = ?", "referral_config").First(&cfg).Error; err == nil {
			var config map[string]interface{}
			if json.Unmarshal(cfg.ConfigValue, &config) == nil {
				if userDiscount, ok := config["userDiscount"].(float64); ok && userDiscount > 0 {
					unitPrice = unitPrice * (1 - userDiscount/100)
					if unitPrice < 0.01 {
						unitPrice = 0.01
					}
					amount = unitPrice * float64(quantity)
					if amount < 0.01 {
						amount = 0.01
					}
				}
			}
		}
	}
	_ = referrerID // 分佣在 PayNotify 时按发起人计算

	// 改造后：发起人帮别人买，发起人自己可已拥有，不再校验

	// 描述
	desc := ""
	switch req.ProductType {
	case "fullbook":
		desc = "《一场Soul的创业实验》全书"
	case "vip":
		desc = "卡若创业派对VIP年度会员（365天）"
	case "match":
		desc = "购买匹配次数"
	case "section":
		var ch model.Chapter
		if err := db.Select("section_title").Where("id = ?", productID).First(&ch).Error; err == nil && ch.SectionTitle != "" {
			desc = ch.SectionTitle
		} else {
			desc = fmt.Sprintf("章节-%s", productID)
		}
	default:
		desc = fmt.Sprintf("%s-%s", req.ProductType, productID)
	}

	expireAt := time.Now().Add(giftPayExpireHours * time.Hour)
	requestSN := "GPR" + wechat.GenerateOrderSn()
	id := "gpr_" + fmt.Sprintf("%d", time.Now().UnixNano()%100000000000)

	gpr := model.GiftPayRequest{
		ID:              id,
		RequestSN:       requestSN,
		InitiatorUserID: req.UserID,
		ProductType:     req.ProductType,
		ProductID:       productID,
		Amount:          amount,
		Description:     desc,
		Status:          "pending_pay",
		Quantity:        quantity,
		RedeemedCount:   0,
		ExpireAt:        expireAt,
	}
	if err := db.Create(&gpr).Error; err != nil {
		fmt.Printf("[GiftPayCreate] 创建失败: %v\n", err)
		// 若报 unknown column 'quantity' 等，需执行 soul-api/scripts/add-gift-pay-quantity.sql
		c.JSON(http.StatusOK, gin.H{"success": false, "error": "创建失败"})
		return
	}

	sectionTitle := desc
	if req.ProductType == "section" && productID != "" {
		var ch model.Chapter
		if err := db.Select("section_title").Where("id = ?", productID).First(&ch).Error; err == nil && ch.SectionTitle != "" {
			sectionTitle = ch.SectionTitle
		}
	}
	path := fmt.Sprintf("pages/gift-pay/detail?requestSn=%s", requestSN)
	c.JSON(http.StatusOK, gin.H{
		"success":      true,
		"requestSn":    requestSN,
		"path":         path,
		"amount":       amount,
		"quantity":     quantity,
		"sectionTitle": sectionTitle,
		"expireAt":     expireAt.Format(time.RFC3339),
	})
}

// GiftPayInitiatorPay POST /api/miniprogram/gift-pay/initiator-pay 发起人支付（改造后：我帮别人付款）
func GiftPayInitiatorPay(c *gin.Context) {
	var req struct {
		RequestSn string `json:"requestSn" binding:"required"`
		OpenID    string `json:"openId" binding:"required"`
		UserID    string `json:"userId" binding:"required"`
	}
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusOK, gin.H{"success": false, "error": "缺少参数"})
		return
	}
	db := database.DB()

	var gpr model.GiftPayRequest
	if err := db.Where("request_sn = ? AND status = ?", req.RequestSn, "pending_pay").First(&gpr).Error; err != nil {
		c.JSON(http.StatusOK, gin.H{"success": false, "error": "代付请求不存在或已支付"})
		return
	}
	if time.Now().After(gpr.ExpireAt) {
		db.Model(&gpr).Update("status", "expired")
		c.JSON(http.StatusOK, gin.H{"success": false, "error": "代付已过期"})
		return
	}
	if req.UserID != gpr.InitiatorUserID {
		c.JSON(http.StatusOK, gin.H{"success": false, "error": "仅发起人可支付"})
		return
	}

	var initiator model.User
	if err := db.Where("open_id = ?", req.OpenID).First(&initiator).Error; err != nil {
		c.JSON(http.StatusOK, gin.H{"success": false, "error": "请先登录"})
		return
	}
	if initiator.ID != gpr.InitiatorUserID {
		c.JSON(http.StatusOK, gin.H{"success": false, "error": "登录用户与发起人不一致"})
		return
	}

	orderSn := wechat.GenerateOrderSn()
	status := "created"
	pm := "wechat"
	productType := "gift_pay_batch"
	productID := gpr.ProductID
	desc := fmt.Sprintf("代付分享 - %s × %d 份", gpr.Description, gpr.Quantity)
	gprID := gpr.ID
	order := model.Order{
		ID:               orderSn,
		OrderSN:          orderSn,
		UserID:           gpr.InitiatorUserID,
		OpenID:           req.OpenID,
		ProductType:      productType,
		ProductID:        &productID,
		Amount:           gpr.Amount,
		Description:      &desc,
		Status:           &status,
		PaymentMethod:    &pm,
		GiftPayRequestID: &gprID,
		PayerUserID:      &gpr.InitiatorUserID,
	}
	if err := db.Create(&order).Error; err != nil {
		c.JSON(http.StatusOK, gin.H{"success": false, "error": "创建订单失败"})
		return
	}

	// 微信 attach 最大 128 字节；发起人付订单已存在，PayNotify 从 order 取 giftPayRequestSn
	attach := `{"ip":1}`
	totalFee := int(math.Round(gpr.Amount * 100)) // 与正常章节支付一致，避免浮点精度导致分额错误
	if totalFee < 1 {
		c.JSON(http.StatusOK, gin.H{"success": false, "error": "金额异常，无法发起支付"})
		return
	}
	ctx := c.Request.Context()
	prepayID, err := wechat.PayJSAPIOrder(ctx, req.OpenID, orderSn, totalFee, "代付-"+gpr.Description, attach)
	if err != nil {
		c.JSON(http.StatusOK, gin.H{"success": false, "error": fmt.Sprintf("支付请求失败: %v", err)})
		return
	}
	payParams, err := wechat.GetJSAPIPayParams(prepayID)
	if err != nil {
		c.JSON(http.StatusOK, gin.H{"success": false, "error": "生成支付参数失败"})
		return
	}

	c.JSON(http.StatusOK, gin.H{
		"success": true,
		"data": gin.H{
			"orderSn":   orderSn,
			"prepayId":  prepayID,
			"payParams": payParams,
		},
	})
}

// GiftPayDetail GET /api/miniprogram/gift-pay/detail?requestSn=xxx&userId= 或 ?sectionId=xxx&userId= 预览态
func GiftPayDetail(c *gin.Context) {
	requestSn := strings.TrimSpace(c.Query("requestSn"))
	sectionId := strings.TrimSpace(c.Query("sectionId"))
	callerUserID := strings.TrimSpace(c.Query("userId"))
	db := database.DB()

	// 预览态：无 requestSn 有 sectionId，返回文章信息供创建代付
	if requestSn == "" && sectionId != "" {
		if callerUserID == "" {
			c.JSON(http.StatusOK, gin.H{"success": false, "error": "请先登录"})
			return
		}
		unitPrice, priceErr := getStandardPrice(db, "section", sectionId)
		if priceErr != nil {
			c.JSON(http.StatusOK, gin.H{"success": false, "error": priceErr.Error()})
			return
		}
		// 发起人若有推荐人，享受折扣（与 create 一致）
		var binding struct {
			ReferrerID string `gorm:"column:referrer_id"`
		}
		if err := db.Raw(`
			SELECT referrer_id FROM referral_bindings
			WHERE referee_id = ? AND status = 'active' AND expiry_date > NOW()
			ORDER BY binding_date DESC LIMIT 1
		`, callerUserID).Scan(&binding).Error; err == nil && binding.ReferrerID != "" {
			var cfg model.SystemConfig
			if err := db.Where("config_key = ?", "referral_config").First(&cfg).Error; err == nil {
				var config map[string]interface{}
				if json.Unmarshal(cfg.ConfigValue, &config) == nil {
					if userDiscount, ok := config["userDiscount"].(float64); ok && userDiscount > 0 {
						unitPrice = unitPrice * (1 - userDiscount/100)
						if unitPrice < 0.01 {
							unitPrice = 0.01
						}
					}
				}
			}
		}
		var ch model.Chapter
		sectionTitle := ""
		productMid := 0
		if err := db.Select("section_title", "mid").Where("id = ?", sectionId).First(&ch).Error; err == nil {
			sectionTitle = ch.SectionTitle
			productMid = ch.MID
		}
		c.JSON(http.StatusOK, gin.H{
			"success":      true,
			"mode":         "create",
			"sectionId":    sectionId,
			"sectionTitle": sectionTitle,
			"productMid":   productMid,
			"unitPrice":    unitPrice,
			"isInitiator":  true,
			"action":       "create",
		})
		return
	}

	if requestSn == "" {
		c.JSON(http.StatusOK, gin.H{"success": false, "error": "缺少代付请求号"})
		return
	}

	var gpr model.GiftPayRequest
	if err := db.Where("request_sn = ?", requestSn).First(&gpr).Error; err != nil {
		c.JSON(http.StatusOK, gin.H{"success": false, "error": "代付请求不存在"})
		return
	}

	if gpr.Status != "pending" && gpr.Status != "pending_pay" && gpr.Status != "paid" && gpr.Status != "refunded" {
		c.JSON(http.StatusOK, gin.H{"success": false, "error": "该代付已处理"})
		return
	}
	if time.Now().After(gpr.ExpireAt) {
		db.Model(&gpr).Update("status", "expired")
		c.JSON(http.StatusOK, gin.H{"success": false, "error": "代付已过期"})
		return
	}
	isInitiator := callerUserID != "" && callerUserID == gpr.InitiatorUserID

	// 发起人昵称与头像（完整展示）
	var initiator model.User
	nickname := "好友"
	initiatorAvatar := ""
	if err := db.Where("id = ?", gpr.InitiatorUserID).Select("nickname", "avatar").First(&initiator).Error; err == nil {
		if initiator.Nickname != nil && *initiator.Nickname != "" {
			nickname = *initiator.Nickname
		}
		if initiator.Avatar != nil && *initiator.Avatar != "" {
			initiatorAvatar = resolveAvatarURL(*initiator.Avatar)
		}
	}

	// 营销：章节类型时返回标题和内容预览
	sectionTitle := gpr.Description
	contentPreview := ""
	productMid := 0
	if gpr.ProductType == "section" && gpr.ProductID != "" {
		var ch model.Chapter
		if err := db.Select("section_title", "content", "mid").Where("id = ?", gpr.ProductID).First(&ch).Error; err == nil {
			if ch.SectionTitle != "" {
				sectionTitle = ch.SectionTitle
			}
			contentPreview = giftPayPreviewContent(ch.Content)
			productMid = ch.MID
		}
	}

	// 领取记录（发起人查看）
	var redeemList []gin.H
	if isInitiator {
		var orders []model.Order
		db.Where("gift_pay_request_id = ? AND product_type = ? AND status = ?",
			gpr.ID, "section", "paid").Order("created_at ASC").Find(&orders)
		for _, o := range orders {
			if o.UserID == "" {
				continue
			}
			var u model.User
			nickname := "用户"
			avatar := ""
			if err := db.Where("id = ?", o.UserID).Select("nickname", "avatar").First(&u).Error; err == nil {
				if u.Nickname != nil && *u.Nickname != "" {
					nickname = *u.Nickname
				}
				if u.Avatar != nil && *u.Avatar != "" {
					avatar = resolveAvatarURL(*u.Avatar)
				}
			}
			redeemList = append(redeemList, gin.H{"userId": o.UserID, "nickname": nickname, "avatar": avatar, "redeemAt": o.CreatedAt.Format("2006-01-02 15:04")})
		}
	}

	// action: pay=发起人待支付 | share=发起人已支付可分享 | redeem=好友可领取 | wait=好友待发起人支付
	action := ""
	if isInitiator {
		if gpr.Status == "pending_pay" {
			action = "pay"
		} else if gpr.Status == "paid" {
			action = "share"
		} else if gpr.Status == "refunded" {
			action = "refunded"
		} else if gpr.Status == "pending" {
			action = "share" // 旧版：待好友付
		}
	} else {
		if gpr.Status == "pending_pay" || gpr.Status == "pending" {
			action = "wait"
		} else if gpr.Status == "paid" {
			// 好友已领取过：返回 alreadyRedeemed，供前端直接跳转 read
			var existCnt int64
			db.Model(&model.Order{}).Where(
				"user_id = ? AND gift_pay_request_id = ? AND product_type = ? AND status = ?",
				callerUserID, gpr.ID, "section", "paid",
			).Count(&existCnt)
			if existCnt > 0 {
				action = "alreadyRedeemed"
			} else {
				action = "redeem"
			}
		} else if gpr.Status == "refunded" {
			action = "refunded"
		}
	}

	resp := gin.H{
		"success":           true,
		"requestSn":         gpr.RequestSN,
		"productType":       gpr.ProductType,
		"productId":         gpr.ProductID,
		"productMid":        productMid,
		"amount":            gpr.Amount,
		"quantity":          gpr.Quantity,
		"redeemedCount":     gpr.RedeemedCount,
		"redeemList":        redeemList,
		"description":       gpr.Description,
		"sectionTitle":      sectionTitle,
		"contentPreview":    contentPreview,
		"initiatorNickname": nickname,
		"initiatorAvatar":   initiatorAvatar,
		"initiatorUserId":   gpr.InitiatorUserID,
		"isInitiator":       isInitiator,
		"action":            action,
		"status":            gpr.Status,
		"expireAt":          gpr.ExpireAt.Format(time.RFC3339),
	}
	c.JSON(http.StatusOK, resp)
}

// GiftPayRedeem POST /api/miniprogram/gift-pay/redeem 好友领取（改造后：免费获得章节）
func GiftPayRedeem(c *gin.Context) {
	var req struct {
		RequestSn string `json:"requestSn" binding:"required"`
		UserID    string `json:"userId" binding:"required"`
	}
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusOK, gin.H{"success": false, "error": "缺少参数"})
		return
	}
	db := database.DB()

	var gpr model.GiftPayRequest
	if err := db.Where("request_sn = ? AND status = ?", req.RequestSn, "paid").First(&gpr).Error; err != nil {
		c.JSON(http.StatusOK, gin.H{"success": false, "error": "代付请求不存在或未支付"})
		return
	}
	if req.UserID == gpr.InitiatorUserID {
		c.JSON(http.StatusOK, gin.H{"success": false, "error": "发起人无需领取"})
		return
	}
	if gpr.RedeemedCount >= gpr.Quantity {
		c.JSON(http.StatusOK, gin.H{"success": false, "error": "已领完"})
		return
	}

	// 同一用户同一 requestSn 只能领一次
	var existCnt int64
	db.Model(&model.Order{}).Where(
		"user_id = ? AND gift_pay_request_id = ? AND product_type = ? AND status = ?",
		req.UserID, gpr.ID, "section", "paid",
	).Count(&existCnt)
	if existCnt > 0 {
		c.JSON(http.StatusOK, gin.H{"success": false, "error": "您已领取过"})
		return
	}

	// 创建好友订单：productType=section, status=paid, paymentMethod=gift_pay
	orderSn := wechat.GenerateOrderSn()
	status := "paid"
	pm := "gift_pay"
	productID := gpr.ProductID
	desc := fmt.Sprintf("代付领取 - %s", gpr.Description)
	gprID := gpr.ID
	amount := 0.0
	order := model.Order{
		ID:               orderSn,
		OrderSN:          orderSn,
		UserID:           req.UserID,
		ProductType:      "section",
		ProductID:        &productID,
		Amount:           amount,
		Description:      &desc,
		Status:           &status,
		PaymentMethod:    &pm,
		GiftPayRequestID: &gprID,
		PayerUserID:      &gpr.InitiatorUserID,
	}
	if err := db.Transaction(func(tx *gorm.DB) error {
		if err := tx.Create(&order).Error; err != nil {
			return err
		}
		return tx.Model(&model.GiftPayRequest{}).Where("id = ?", gpr.ID).
			Update("redeemed_count", gorm.Expr("redeemed_count + 1")).Error
	}); err != nil {
		c.JSON(http.StatusOK, gin.H{"success": false, "error": "领取失败"})
		return
	}

	_ = amount
	productMid := 0
	if gpr.ProductType == "section" && gpr.ProductID != "" {
		var ch model.Chapter
		if err := db.Select("mid").Where("id = ?", gpr.ProductID).First(&ch).Error; err == nil {
			productMid = ch.MID
		}
	}
	c.JSON(http.StatusOK, gin.H{
		"success":    true,
		"sectionId":  gpr.ProductID,
		"sectionMid": productMid,
	})
}

// GiftPayCancel POST /api/miniprogram/gift-pay/cancel 发起人取消
func GiftPayCancel(c *gin.Context) {
	var req struct {
		RequestSn string `json:"requestSn" binding:"required"`
		UserID    string `json:"userId" binding:"required"`
	}
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusOK, gin.H{"success": false, "error": "缺少参数"})
		return
	}
	db := database.DB()

	var gpr model.GiftPayRequest
	if err := db.Where("request_sn = ?", req.RequestSn).First(&gpr).Error; err != nil {
		c.JSON(http.StatusOK, gin.H{"success": false, "error": "代付请求不存在"})
		return
	}
	if gpr.InitiatorUserID != req.UserID {
		c.JSON(http.StatusOK, gin.H{"success": false, "error": "无权取消"})
		return
	}
	if gpr.Status != "pending" && gpr.Status != "pending_pay" {
		c.JSON(http.StatusOK, gin.H{"success": false, "error": "该代付已处理"})
		return
	}

	db.Model(&gpr).Update("status", "cancelled")
	c.JSON(http.StatusOK, gin.H{"success": true, "message": "已取消"})
}

// GiftPayMyRequests GET /api/miniprogram/gift-pay/my-requests?userId= 我发起的（含领取记录）
func GiftPayMyRequests(c *gin.Context) {
	userID := c.Query("userId")
	if userID == "" {
		c.JSON(http.StatusOK, gin.H{"success": false, "error": "缺少userId"})
		return
	}
	db := database.DB()

	var list []model.GiftPayRequest
	db.Where("initiator_user_id = ? AND status != ?", userID, "cancelled").Order("created_at DESC").Limit(50).Find(&list)

	out := make([]gin.H, 0, len(list))
	for _, r := range list {
		// 领取记录：orders 表 gift_pay_request_id + product_type=section + payment_method=gift_pay
		var redeemList []gin.H
		var orders []model.Order
		db.Where("gift_pay_request_id = ? AND product_type = ? AND status = ?",
			r.ID, "section", "paid").Order("created_at ASC").Find(&orders) // 好友领取订单
		for _, o := range orders {
			if o.UserID == "" {
				continue
			}
			var u model.User
			nickname := "用户"
			avatar := ""
			if err := db.Where("id = ?", o.UserID).Select("nickname", "avatar").First(&u).Error; err == nil {
				if u.Nickname != nil && *u.Nickname != "" {
					nickname = *u.Nickname
				}
				if u.Avatar != nil && *u.Avatar != "" {
					avatar = resolveAvatarURL(*u.Avatar)
				}
			}
			redeemAt := o.CreatedAt.Format("2006-01-02 15:04")
			redeemList = append(redeemList, gin.H{"userId": o.UserID, "nickname": nickname, "avatar": avatar, "redeemAt": redeemAt})
		}
		out = append(out, gin.H{
			"requestSn":     r.RequestSN,
			"productType":   r.ProductType,
			"productId":     r.ProductID,
			"amount":        r.Amount,
			"quantity":      r.Quantity,
			"redeemedCount": r.RedeemedCount,
			"description":   r.Description,
			"status":        r.Status,
			"expireAt":      r.ExpireAt.Format(time.RFC3339),
			"createdAt":     r.CreatedAt.Format(time.RFC3339),
			"redeemList":    redeemList,
		})
	}
	c.JSON(http.StatusOK, gin.H{"success": true, "list": out})
}

// AdminGiftPayRequestsList GET /api/admin/gift-pay-requests 管理端-代付请求列表
func AdminGiftPayRequestsList(c *gin.Context) {
	page, _ := strconv.Atoi(c.DefaultQuery("page", "1"))
	pageSize, _ := strconv.Atoi(c.DefaultQuery("pageSize", "20"))
	status := strings.TrimSpace(c.Query("status"))
	if page < 1 {
		page = 1
	}
	if pageSize < 1 || pageSize > 100 {
		pageSize = 20
	}
	db := database.DB()
	q := db.Model(&model.GiftPayRequest{})
	if status != "" {
		q = q.Where("status = ?", status)
	}
	var total int64
	q.Count(&total)
	var list []model.GiftPayRequest
	q.Order("created_at DESC").Offset((page - 1) * pageSize).Limit(pageSize).Find(&list)
	userIDs := make(map[string]bool)
	for _, r := range list {
		userIDs[r.InitiatorUserID] = true
		if r.PayerUserID != nil && *r.PayerUserID != "" {
			userIDs[*r.PayerUserID] = true
		}
	}
	nicknames := make(map[string]string)
	if len(userIDs) > 0 {
		ids := make([]string, 0, len(userIDs))
		for id := range userIDs {
			ids = append(ids, id)
		}
		var users []model.User
		db.Select("id, nickname").Where("id IN ?", ids).Find(&users)
		for _, u := range users {
			if u.Nickname != nil {
				nicknames[u.ID] = *u.Nickname
			}
		}
	}
	out := make([]gin.H, 0, len(list))
	for _, r := range list {
		initiatorNick := nicknames[r.InitiatorUserID]
		payerNick := ""
		if r.PayerUserID != nil {
			payerNick = nicknames[*r.PayerUserID]
		}
		orderID := ""
		if r.OrderID != nil {
			orderID = *r.OrderID
		}
		out = append(out, gin.H{
			"id":              r.ID,
			"requestSn":       r.RequestSN,
			"initiatorUserId": r.InitiatorUserID,
			"initiatorNick":   initiatorNick,
			"productType":     r.ProductType,
			"productId":       r.ProductID,
			"amount":          r.Amount,
			"quantity":        r.Quantity,
			"redeemedCount":   r.RedeemedCount,
			"description":     r.Description,
			"status":          r.Status,
			"payerUserId":     r.PayerUserID,
			"payerNick":       payerNick,
			"orderId":         orderID,
			"expireAt":        r.ExpireAt,
			"createdAt":       r.CreatedAt,
			"updatedAt":       r.UpdatedAt,
		})
	}
	c.JSON(http.StatusOK, gin.H{"success": true, "data": out, "total": total})
}