package handler

import (
	"encoding/json"
	"fmt"
	"net/http"
	"sort"
	"strconv"
	"strings"
	"time"

	"soul-api/internal/config"
	"soul-api/internal/database"
	"soul-api/internal/model"
	"soul-api/internal/oss"

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

// sanitizeDisplayOneLine 展示用单行：去掉粘贴/HTML 带入的换行与多余空白（轨迹标题、订单名、昵称等）
func sanitizeDisplayOneLine(s string) string {
	s = strings.TrimSpace(s)
	if s == "" {
		return ""
	}
	s = strings.ReplaceAll(s, "\r\n", " ")
	s = strings.ReplaceAll(s, "\n", " ")
	s = strings.ReplaceAll(s, "\r", " ")
	return strings.Join(strings.Fields(s), " ")
}

// avatarToPath 从头像 URL 提取路径（不含域名），用于保存到 DB
func avatarToPath(s string) string {
	s = strings.TrimSpace(s)
	if s == "" {
		return s
	}
	if idx := strings.Index(s, "/uploads/"); idx >= 0 {
		return s[idx:]
	}
	if strings.HasPrefix(s, "/") {
		return s
	}
	return s
}

// resolveAvatarURL 将路径解析为完整可访问 URL（返回时使用）
func resolveAvatarURL(s string) string {
	s = strings.TrimSpace(s)
	if s == "" {
		return s
	}
	// 已是完整 URL，直接返回
	if strings.HasPrefix(s, "http://") || strings.HasPrefix(s, "https://") {
		return s
	}
	path := s
	if !strings.HasPrefix(path, "/") {
		path = "/" + path
	}
	// OSS 存储：用 OSS 公网 URL
	if oss.IsEnabled() {
		if u := oss.PublicURL(path); u != "" {
			return u
		}
	}
	// 本地存储：用 BaseURL 拼接
	if cfg := config.Get(); cfg != nil && cfg.BaseURL != "" {
		return cfg.BaseURLJoin(path)
	}
	return path
}

// UserAddressesGet GET /api/user/addresses?userId=
func UserAddressesGet(c *gin.Context) {
	userId := c.Query("userId")
	if userId == "" {
		c.JSON(http.StatusBadRequest, gin.H{"success": false, "message": "缺少 userId"})
		return
	}
	var list []model.UserAddress
	if err := database.DB().Where("user_id = ?", userId).Order("is_default DESC, updated_at DESC").Find(&list).Error; err != nil {
		c.JSON(http.StatusOK, gin.H{"success": false, "error": "查询地址失败: " + err.Error()})
		return
	}
	out := make([]gin.H, 0, len(list))
	for _, r := range list {
		full := r.Province + r.City + r.District + r.Detail
		out = append(out, gin.H{
			"id": r.ID, "userId": r.UserID, "name": r.Name, "phone": r.Phone,
			"province": r.Province, "city": r.City, "district": r.District, "detail": r.Detail,
			"isDefault": r.IsDefault, "fullAddress": full, "createdAt": r.CreatedAt, "updatedAt": r.UpdatedAt,
		})
	}
	c.JSON(http.StatusOK, gin.H{"success": true, "list": out})
}

// UserAddressesPost POST /api/user/addresses
func UserAddressesPost(c *gin.Context) {
	var body struct {
		UserID    string `json:"userId" binding:"required"`
		Name      string `json:"name" binding:"required"`
		Phone     string `json:"phone" binding:"required"`
		Province  string `json:"province"`
		City      string `json:"city"`
		District  string `json:"district"`
		Detail    string `json:"detail" binding:"required"`
		IsDefault bool   `json:"isDefault"`
	}
	if err := c.ShouldBindJSON(&body); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"success": false, "message": "缺少必填项：userId, name, phone, detail"})
		return
	}
	id := fmt.Sprintf("addr_%d", time.Now().UnixNano()%100000000000)
	db := database.DB()
	if body.IsDefault {
		db.Model(&model.UserAddress{}).Where("user_id = ?", body.UserID).Update("is_default", false)
	}
	addr := model.UserAddress{
		ID: id, UserID: body.UserID, Name: body.Name, Phone: body.Phone,
		Province: body.Province, City: body.City, District: body.District, Detail: body.Detail,
		IsDefault: body.IsDefault,
	}
	if err := db.Create(&addr).Error; err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"success": false, "message": "添加地址失败"})
		return
	}
	c.JSON(http.StatusOK, gin.H{"success": true, "id": id, "message": "添加成功"})
}

// UserAddressesByID GET/PUT/DELETE /api/user/addresses/:id
func UserAddressesByID(c *gin.Context) {
	id := c.Param("id")
	if id == "" {
		c.JSON(http.StatusBadRequest, gin.H{"success": false, "message": "缺少地址 id"})
		return
	}
	db := database.DB()
	switch c.Request.Method {
	case "GET":
		var r model.UserAddress
		if err := db.Where("id = ?", id).First(&r).Error; err != nil {
			c.JSON(http.StatusNotFound, gin.H{"success": false, "message": "地址不存在"})
			return
		}
		full := r.Province + r.City + r.District + r.Detail
		c.JSON(http.StatusOK, gin.H{"success": true, "data": gin.H{
			"id": r.ID, "userId": r.UserID, "name": r.Name, "phone": r.Phone,
			"province": r.Province, "city": r.City, "district": r.District, "detail": r.Detail,
			"isDefault": r.IsDefault, "fullAddress": full, "createdAt": r.CreatedAt, "updatedAt": r.UpdatedAt,
		}})
	case "PUT":
		var r model.UserAddress
		if err := db.Where("id = ?", id).First(&r).Error; err != nil {
			c.JSON(http.StatusNotFound, gin.H{"success": false, "message": "地址不存在"})
			return
		}
		var body struct {
			Name      *string `json:"name"`
			Phone     *string `json:"phone"`
			Province  *string `json:"province"`
			City      *string `json:"city"`
			District  *string `json:"district"`
			Detail    *string `json:"detail"`
			IsDefault *bool   `json:"isDefault"`
		}
		_ = c.ShouldBindJSON(&body)
		updates := make(map[string]interface{})
		if body.Name != nil {
			updates["name"] = *body.Name
		}
		if body.Phone != nil {
			updates["phone"] = *body.Phone
		}
		if body.Province != nil {
			updates["province"] = *body.Province
		}
		if body.City != nil {
			updates["city"] = *body.City
		}
		if body.District != nil {
			updates["district"] = *body.District
		}
		if body.Detail != nil {
			updates["detail"] = *body.Detail
		}
		if body.IsDefault != nil {
			updates["is_default"] = *body.IsDefault
			if *body.IsDefault {
				db.Model(&model.UserAddress{}).Where("user_id = ?", r.UserID).Update("is_default", false)
			}
		}
		if len(updates) > 0 {
			updates["updated_at"] = time.Now()
			db.Model(&r).Updates(updates)
		}
		db.Where("id = ?", id).First(&r)
		full := r.Province + r.City + r.District + r.Detail
		c.JSON(http.StatusOK, gin.H{"success": true, "item": gin.H{
			"id": r.ID, "userId": r.UserID, "name": r.Name, "phone": r.Phone,
			"province": r.Province, "city": r.City, "district": r.District, "detail": r.Detail,
			"isDefault": r.IsDefault, "fullAddress": full, "createdAt": r.CreatedAt, "updatedAt": r.UpdatedAt,
		}, "message": "更新成功"})
	case "DELETE":
		if err := db.Where("id = ?", id).Delete(&model.UserAddress{}).Error; err != nil {
			c.JSON(http.StatusInternalServerError, gin.H{"success": false, "message": "删除失败"})
			return
		}
		c.JSON(http.StatusOK, gin.H{"success": true, "message": "删除成功"})
	}
}

// UserCheckPurchased GET /api/user/check-purchased?userId=&type=section|fullbook&productId=
func UserCheckPurchased(c *gin.Context) {
	userId := c.Query("userId")
	type_ := c.Query("type")
	productId := c.Query("productId")
	if userId == "" {
		c.JSON(http.StatusBadRequest, gin.H{"success": false, "error": "缺少 userId 参数"})
		return
	}
	db := database.DB()
	var user model.User
	if err := db.Where("id = ?", userId).First(&user).Error; err != nil {
		c.JSON(http.StatusNotFound, gin.H{"success": false, "error": "用户不存在"})
		return
	}
	// 超级VIP（管理端开通）：is_vip=1 且 vip_expire_date>NOW 时，所有文章阅读免费，无需再查订单
	if user.IsVip != nil && *user.IsVip && user.VipExpireDate != nil && user.VipExpireDate.After(time.Now()) {
		c.JSON(http.StatusOK, gin.H{"success": true, "data": gin.H{"isPurchased": true, "reason": "has_vip"}})
		return
	}
	if type_ == "fullbook" {
		// 9.9 买断：永久权益，写入 users.has_full_book；兜底再查订单
		if user.HasFullBook != nil && *user.HasFullBook {
			c.JSON(http.StatusOK, gin.H{"success": true, "data": gin.H{"isPurchased": true, "reason": "has_full_book"}})
			return
		}
		var count int64
		db.Model(&model.Order{}).Where("user_id = ? AND product_type = ? AND status = ?", userId, "fullbook", "paid").Count(&count)
		c.JSON(http.StatusOK, gin.H{"success": true, "data": gin.H{"isPurchased": count > 0, "reason": map[bool]string{true: "fullbook_order_exists"}[count > 0]}})
		return
	}
	if type_ == "section" && productId != "" {
		// 章节：需要区分普通版/增值版
		var ch model.Chapter
		// 不加载 content，避免大字段
		_ = db.Select("id", "is_free", "price", "edition_standard", "edition_premium").Where("id = ?", productId).First(&ch).Error

		// 免费章节：直接可读
		if ch.ID != "" {
			if (ch.IsFree != nil && *ch.IsFree) || (ch.Price != nil && *ch.Price == 0) {
				c.JSON(http.StatusOK, gin.H{"success": true, "data": gin.H{"isPurchased": true, "reason": "free_section"}})
				return
			}
		}

		isPremium := ch.ID != "" && ch.EditionPremium != nil && *ch.EditionPremium
		// 默认普通版：未明确标记增值版时，按普通版处理
		isStandard := !isPremium

		// 普通版：买断可读；增值版：买断不包含
		if isStandard {
			if user.HasFullBook != nil && *user.HasFullBook {
				c.JSON(http.StatusOK, gin.H{"success": true, "data": gin.H{"isPurchased": true, "reason": "has_full_book"}})
				return
			}
		}

		var count int64
		db.Model(&model.Order{}).Where("user_id = ? AND product_type = ? AND product_id = ? AND status = ?", userId, "section", productId, "paid").Count(&count)
		c.JSON(http.StatusOK, gin.H{"success": true, "data": gin.H{"isPurchased": count > 0, "reason": map[bool]string{true: "section_order_exists"}[count > 0]}})
		return
	}
	c.JSON(http.StatusOK, gin.H{"success": true, "data": gin.H{"isPurchased": false, "reason": nil}})
}

// UserProfileGet GET /api/user/profile?userId= 或 openId=
func UserProfileGet(c *gin.Context) {
	userId := c.Query("userId")
	openId := c.Query("openId")
	if userId == "" && openId == "" {
		c.JSON(http.StatusBadRequest, gin.H{"success": false, "error": "请提供userId或openId"})
		return
	}
	db := database.DB()
	var user model.User
	q := db.Select("id", "open_id", "nickname", "avatar", "phone", "wechat_id", "referral_code",
		"has_full_book", "earnings", "pending_earnings", "referral_count", "created_at",
		"mbti", "region", "industry", "position", "business_scale", "skills",
		"story_best_month", "story_achievement", "story_turning", "help_offer", "help_need", "project_intro")
	if userId != "" {
		q = q.Where("id = ?", userId)
	} else {
		q = q.Where("open_id = ?", openId)
	}
	if err := q.First(&user).Error; err != nil {
		c.JSON(http.StatusNotFound, gin.H{"success": false, "error": "用户不存在"})
		return
	}
	profileComplete := (user.Phone != nil && *user.Phone != "") || (user.WechatID != nil && *user.WechatID != "")
	hasAvatar := user.Avatar != nil && *user.Avatar != "" && len(*user.Avatar) > 0
	str := func(p *string) interface{} {
		if p != nil {
			return *p
		}
		return ""
	}
	avatarVal := resolveAvatarURL(str(user.Avatar).(string))
	resp := gin.H{
		"id": user.ID, "openId": user.OpenID, "nickname": str(user.Nickname), "avatar": avatarVal,
		"phone": str(user.Phone), "wechatId": str(user.WechatID), "referralCode": user.ReferralCode,
		"hasFullBook": user.HasFullBook, "earnings": user.Earnings, "pendingEarnings": user.PendingEarnings,
		"referralCount": user.ReferralCount, "profileComplete": profileComplete, "hasAvatar": hasAvatar,
		"createdAt": user.CreatedAt,
		// P3 资料扩展：统一返回所有表单字段，空值用 "" 便于前端回显
		"mbti": str(user.Mbti), "region": str(user.Region), "industry": str(user.Industry),
		"position": str(user.Position), "businessScale": str(user.BusinessScale), "skills": str(user.Skills),
		"storyBestMonth": str(user.StoryBestMonth), "storyAchievement": str(user.StoryAchievement),
		"storyTurning": str(user.StoryTurning), "helpOffer": str(user.HelpOffer), "helpNeed": str(user.HelpNeed),
		"projectIntro": str(user.ProjectIntro),
	}
	c.JSON(http.StatusOK, gin.H{"success": true, "data": resp})
}

// UserProfilePost POST /api/user/profile 更新用户资料
func UserProfilePost(c *gin.Context) {
	var body struct {
		UserID           string  `json:"userId"`
		OpenID           string  `json:"openId"`
		Nickname         *string `json:"nickname"`
		Avatar           *string `json:"avatar"`
		Phone            *string `json:"phone"`
		WechatID         *string `json:"wechatId"`
		Mbti             *string `json:"mbti"`
		Region           *string `json:"region"`
		Industry         *string `json:"industry"`
		Position         *string `json:"position"`
		BusinessScale    *string `json:"businessScale"`
		Skills           *string `json:"skills"`
		StoryBestMonth   *string `json:"storyBestMonth"`
		StoryAchievement *string `json:"storyAchievement"`
		StoryTurning     *string `json:"storyTurning"`
		HelpOffer        *string `json:"helpOffer"`
		HelpNeed         *string `json:"helpNeed"`
		ProjectIntro     *string `json:"projectIntro"`
	}
	if err := c.ShouldBindJSON(&body); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"success": false, "error": "请提供userId或openId"})
		return
	}
	identifier := body.UserID
	byID := true
	if identifier == "" {
		identifier = body.OpenID
		byID = false
	}
	if identifier == "" {
		c.JSON(http.StatusBadRequest, gin.H{"success": false, "error": "请提供userId或openId"})
		return
	}
	db := database.DB()
	var user model.User
	if byID {
		db = db.Where("id = ?", identifier)
	} else {
		db = db.Where("open_id = ?", identifier)
	}
	if err := db.First(&user).Error; err != nil {
		c.JSON(http.StatusNotFound, gin.H{"success": false, "error": "用户不存在"})
		return
	}
	updates := make(map[string]interface{})
	if body.Nickname != nil {
		updates["nickname"] = *body.Nickname
	}
	if body.Avatar != nil {
		updates["avatar"] = avatarToPath(*body.Avatar)
	}
	if body.Phone != nil {
		updates["phone"] = *body.Phone
	}
	if body.WechatID != nil {
		updates["wechat_id"] = *body.WechatID
	}
	if body.Mbti != nil {
		updates["mbti"] = *body.Mbti
	}
	if body.Region != nil {
		updates["region"] = *body.Region
	}
	if body.Industry != nil {
		updates["industry"] = *body.Industry
	}
	if body.Position != nil {
		updates["position"] = *body.Position
	}
	if body.BusinessScale != nil {
		updates["business_scale"] = *body.BusinessScale
	}
	if body.Skills != nil {
		updates["skills"] = *body.Skills
	}
	if body.StoryBestMonth != nil {
		updates["story_best_month"] = *body.StoryBestMonth
	}
	if body.StoryAchievement != nil {
		updates["story_achievement"] = *body.StoryAchievement
	}
	if body.StoryTurning != nil {
		updates["story_turning"] = *body.StoryTurning
	}
	if body.HelpOffer != nil {
		updates["help_offer"] = *body.HelpOffer
	}
	if body.HelpNeed != nil {
		updates["help_need"] = *body.HelpNeed
	}
	if body.ProjectIntro != nil {
		updates["project_intro"] = *body.ProjectIntro
	}
	if len(updates) == 0 {
		c.JSON(http.StatusBadRequest, gin.H{"success": false, "error": "没有需要更新的字段"})
		return
	}
	updates["updated_at"] = time.Now()
	db.Model(&user).Updates(updates)
	// 重新查询并返回与 GET 一致的完整资料结构，空值统一为 ""
	profileCols := []string{"id", "open_id", "nickname", "avatar", "phone", "wechat_id", "referral_code", "created_at",
		"mbti", "region", "industry", "position", "business_scale", "skills",
		"story_best_month", "story_achievement", "story_turning", "help_offer", "help_need", "project_intro"}
	if err := database.DB().Select(profileCols).Where("id = ?", user.ID).First(&user).Error; err == nil {
		str := func(p *string) interface{} {
			if p != nil {
				return *p
			}
			return ""
		}
		avatarVal := resolveAvatarURL(str(user.Avatar).(string))
		resp := gin.H{
			"id": user.ID, "openId": user.OpenID, "nickname": str(user.Nickname), "avatar": avatarVal,
			"phone": str(user.Phone), "wechatId": str(user.WechatID), "referralCode": user.ReferralCode,
			"createdAt": user.CreatedAt,
			"mbti":      str(user.Mbti), "region": str(user.Region), "industry": str(user.Industry),
			"position": str(user.Position), "businessScale": str(user.BusinessScale), "skills": str(user.Skills),
			"storyBestMonth": str(user.StoryBestMonth), "storyAchievement": str(user.StoryAchievement),
			"storyTurning": str(user.StoryTurning), "helpOffer": str(user.HelpOffer), "helpNeed": str(user.HelpNeed),
			"projectIntro": str(user.ProjectIntro),
		}
		c.JSON(http.StatusOK, gin.H{"success": true, "message": "资料更新成功", "data": resp})
	} else {
		avatarVal := ""
		if body.Avatar != nil {
			avatarVal = resolveAvatarURL(avatarToPath(*body.Avatar))
		}
		c.JSON(http.StatusOK, gin.H{"success": true, "message": "资料更新成功", "data": gin.H{
			"id": user.ID, "nickname": body.Nickname, "avatar": avatarVal, "phone": body.Phone, "wechatId": body.WechatID, "referralCode": user.ReferralCode,
		}})
	}
}

// UserPurchaseStatus GET /api/user/purchase-status?userId=
func UserPurchaseStatus(c *gin.Context) {
	userId := c.Query("userId")
	if userId == "" {
		c.JSON(http.StatusBadRequest, gin.H{"success": false, "error": "缺少 userId 参数"})
		return
	}
	db := database.DB()
	var user model.User
	if err := db.Where("id = ?", userId).First(&user).Error; err != nil {
		c.JSON(http.StatusNotFound, gin.H{"success": false, "error": "用户不存在"})
		return
	}
	var orderRows []struct {
		ProductID string
		MID       int
	}
	db.Raw(`SELECT DISTINCT o.product_id, c.mid FROM orders o 
		LEFT JOIN chapters c ON c.id = o.product_id 
		WHERE o.user_id = ? AND o.status = ? AND o.product_type = ?`, userId, "paid", "section").Scan(&orderRows)
	purchasedSections := make([]string, 0, len(orderRows))
	sectionMidMap := make(map[string]int)
	for _, r := range orderRows {
		if r.ProductID != "" {
			purchasedSections = append(purchasedSections, r.ProductID)
			if r.MID > 0 {
				sectionMidMap[r.ProductID] = r.MID
			}
		}
	}
	// 是否有推荐人（被推荐绑定，可享好友优惠）
	var refCount int64
	db.Model(&model.ReferralBinding{}).Where("referee_id = ? AND status = ?", userId, "active").
		Where("expiry_date > ?", time.Now()).Count(&refCount)
	hasReferrer := refCount > 0

	// 匹配次数配额：纯计算（订单 + match_records）
	freeLimit := getFreeMatchLimit(db)
	matchQuota := GetMatchQuota(db, userId, freeLimit)
	earnings := 0.0
	if user.Earnings != nil {
		earnings = *user.Earnings
	}
	pendingEarnings := 0.0
	if user.PendingEarnings != nil {
		pendingEarnings = *user.PendingEarnings
	}
	// 9.9 买断：仅表示“普通版买断”，不等同 VIP（增值版仍需 VIP 或单章购买）
	hasFullBook := user.HasFullBook != nil && *user.HasFullBook
	c.JSON(http.StatusOK, gin.H{"success": true, "data": gin.H{
		"hasFullBook":       hasFullBook,
		"purchasedSections": purchasedSections,
		"sectionMidMap":     sectionMidMap,
		"purchasedCount":    len(purchasedSections),
		"hasReferrer":       hasReferrer,
		"matchCount":        matchQuota.PurchasedTotal,
		"matchQuota": gin.H{
			"purchasedTotal":   matchQuota.PurchasedTotal,
			"purchasedUsed":    matchQuota.PurchasedUsed,
			"matchesUsedToday": matchQuota.MatchesUsedToday,
			"freeRemainToday":  matchQuota.FreeRemainToday,
			"purchasedRemain":  matchQuota.PurchasedRemain,
			"remainToday":      matchQuota.RemainToday,
		},
		"earnings":        earnings,
		"pendingEarnings": pendingEarnings,
	}})
}

// UserReadingProgressGet GET /api/user/reading-progress?userId=
func UserReadingProgressGet(c *gin.Context) {
	userId := c.Query("userId")
	if userId == "" {
		c.JSON(http.StatusBadRequest, gin.H{"success": false, "error": "缺少 userId 参数"})
		return
	}
	var list []model.ReadingProgress
	if err := database.DB().Where("user_id = ?", userId).Order("last_open_at DESC").Find(&list).Error; err != nil {
		c.JSON(http.StatusOK, gin.H{"success": true, "data": []interface{}{}})
		return
	}
	out := make([]gin.H, 0, len(list))
	for _, r := range list {
		out = append(out, gin.H{
			"section_id": r.SectionID, "progress": r.Progress, "duration": r.Duration, "status": r.Status,
			"completed_at": r.CompletedAt, "first_open_at": r.FirstOpenAt, "last_open_at": r.LastOpenAt,
		})
	}
	c.JSON(http.StatusOK, gin.H{"success": true, "data": out})
}

// parseCompletedAtPtr 解析 completedAt：RFC3339 字符串、毫秒/秒时间戳（float64）
func parseCompletedAtPtr(v interface{}) *time.Time {
	if v == nil {
		return nil
	}
	switch x := v.(type) {
	case string:
		s := strings.TrimSpace(x)
		if s == "" {
			return nil
		}
		if t, err := time.Parse(time.RFC3339, s); err == nil {
			return &t
		}
		if t, err := time.Parse(time.RFC3339Nano, s); err == nil {
			return &t
		}
		return nil
	case float64:
		if x <= 0 {
			return nil
		}
		var t time.Time
		if x >= 1e12 {
			t = time.UnixMilli(int64(x))
		} else {
			t = time.Unix(int64(x), 0)
		}
		return &t
	case int64:
		if x <= 0 {
			return nil
		}
		t := time.UnixMilli(x)
		return &t
	default:
		return nil
	}
}

// parseDuration 从 JSON 解析 duration，兼容数字与字符串（防止客户端传字符串导致累加异常）
func parseDuration(v interface{}) int {
	if v == nil {
		return 0
	}
	switch x := v.(type) {
	case float64:
		return int(x)
	case int:
		return x
	case int64:
		return int(x)
	case string:
		n, _ := strconv.Atoi(x)
		return n
	default:
		return 0
	}
}

// UserReadingProgressPost POST /api/user/reading-progress
func UserReadingProgressPost(c *gin.Context) {
	var body struct {
		UserID      string      `json:"userId" binding:"required"`
		SectionID   string      `json:"sectionId" binding:"required"`
		Progress    int         `json:"progress"`
		Duration    interface{} `json:"duration"` // 兼容 int/float64/string，防止字符串导致累加异常
		Status      string      `json:"status"`
		CompletedAt interface{} `json:"completedAt"` // 兼容 ISO 字符串或历史客户端误传的时间戳数字
	}
	if err := c.ShouldBindJSON(&body); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"success": false, "error": "缺少必要参数"})
		return
	}
	duration := parseDuration(body.Duration)
	if duration < 0 {
		duration = 0
	}
	db := database.DB()
	now := time.Now()
	var existing model.ReadingProgress
	err := db.Where("user_id = ? AND section_id = ?", body.UserID, body.SectionID).First(&existing).Error
	if err == nil {
		newProgress := existing.Progress
		if body.Progress > newProgress {
			newProgress = body.Progress
		}
		newDuration := existing.Duration + duration
		newStatus := body.Status
		if newStatus == "" {
			newStatus = "reading"
		}
		completedAt := parseCompletedAtPtr(body.CompletedAt)
		if completedAt == nil && existing.CompletedAt != nil {
			completedAt = existing.CompletedAt
		}
		db.Model(&existing).Updates(map[string]interface{}{
			"progress": newProgress, "duration": newDuration, "status": newStatus,
			"completed_at": completedAt, "last_open_at": now, "updated_at": now,
		})
	} else {
		status := body.Status
		if status == "" {
			status = "reading"
		}
		completedAt := parseCompletedAtPtr(body.CompletedAt)
		db.Create(&model.ReadingProgress{
			UserID: body.UserID, SectionID: body.SectionID, Progress: body.Progress, Duration: duration,
			Status: status, CompletedAt: completedAt, FirstOpenAt: &now, LastOpenAt: &now,
		})
	}
	c.JSON(http.StatusOK, gin.H{"success": true, "message": "进度已保存"})
}

func userTrackActionLabelCN(action string) string {
	switch action {
	case "view_chapter":
		return "浏览章节"
	case "purchase":
		return "购买"
	case "match":
		return "派对匹配"
	case "login":
		return "登录"
	case "register":
		return "注册"
	case "share":
		return "分享"
	case "bind_phone":
		return "绑定手机"
	case "bind_wechat":
		return "绑定微信"
	case "fill_profile":
		return "完善资料"
	case "visit_page":
		return "访问页面"
	default:
		if action == "" {
			return "行为"
		}
		return action
	}
}

func humanTimeAgoCN(t time.Time) string {
	if t.IsZero() {
		return ""
	}
	d := time.Since(t)
	if d < time.Minute {
		return "刚刚"
	}
	if d < time.Hour {
		return fmt.Sprintf("%d分钟前", int(d.Minutes()))
	}
	if d < 24*time.Hour {
		return fmt.Sprintf("%d小时前", int(d.Hours()))
	}
	if d < 30*24*time.Hour {
		return fmt.Sprintf("%d天前", int(d.Hours()/24))
	}
	return t.Format("2006-01-02")
}

// resolveChapterTitlesForTracks 批量解析章节/小节标题（id 或 chapter_id 命中）
func resolveChapterTitlesForTracks(db *gorm.DB, tracks []model.UserTrack) map[string]string {
	keys := map[string]struct{}{}
	for _, t := range tracks {
		if t.ChapterID != nil && strings.TrimSpace(*t.ChapterID) != "" {
			keys[strings.TrimSpace(*t.ChapterID)] = struct{}{}
		}
		if t.Target != nil && strings.TrimSpace(*t.Target) != "" {
			keys[strings.TrimSpace(*t.Target)] = struct{}{}
		}
	}
	if len(keys) == 0 {
		return map[string]string{}
	}
	ids := make([]string, 0, len(keys))
	for k := range keys {
		ids = append(ids, k)
	}
	var chaps []model.Chapter
	if err := db.Where("id IN ? OR chapter_id IN ?", ids, ids).Find(&chaps).Error; err != nil {
		return map[string]string{}
	}
	out := make(map[string]string)
	for _, c := range chaps {
		title := sanitizeDisplayOneLine(c.SectionTitle)
		if title == "" {
			title = sanitizeDisplayOneLine(c.ChapterTitle)
		}
		if title == "" {
			title = c.ID
		}
		out[c.ID] = title
		if strings.TrimSpace(c.ChapterID) != "" {
			out[strings.TrimSpace(c.ChapterID)] = title
		}
	}
	return out
}

// UserTrackGet GET /api/user/track?userId=&limit= 从 user_tracks 表查（GORM）
func UserTrackGet(c *gin.Context) {
	userId := c.Query("userId")
	phone := c.Query("phone")
	limit, _ := strconv.Atoi(c.DefaultQuery("limit", "50"))
	if limit < 1 || limit > 100 {
		limit = 50
	}
	if userId == "" && phone == "" {
		c.JSON(http.StatusBadRequest, gin.H{"success": false, "error": "需要用户ID或手机号"})
		return
	}
	db := database.DB()
	if userId == "" && phone != "" {
		var u model.User
		if err := db.Where("phone = ?", phone).First(&u).Error; err != nil {
			c.JSON(http.StatusOK, gin.H{"success": false, "error": "用户不存在"})
			return
		}
		userId = u.ID
	}
	var tracks []model.UserTrack
	if err := db.Where("user_id = ?", userId).Order("created_at DESC").Limit(limit).Find(&tracks).Error; err != nil {
		c.JSON(http.StatusOK, gin.H{"success": true, "tracks": []interface{}{}, "stats": gin.H{}, "total": 0})
		return
	}
	titleMap := resolveChapterTitlesForTracks(db, tracks)
	stats := make(map[string]int)
	formatted := make([]gin.H, 0, len(tracks))
	for _, t := range tracks {
		stats[t.Action]++
		target := ""
		if t.Target != nil {
			target = *t.Target
		}
		if t.ChapterID != nil && target == "" {
			target = *t.ChapterID
		}
		chapterTitle := ""
		if t.ChapterID != nil {
			if v, ok := titleMap[strings.TrimSpace(*t.ChapterID)]; ok {
				chapterTitle = v
			}
		}
		if chapterTitle == "" && target != "" {
			if v, ok := titleMap[strings.TrimSpace(target)]; ok {
				chapterTitle = v
			}
		}
		var createdAt time.Time
		if t.CreatedAt != nil {
			createdAt = *t.CreatedAt
		}
		formatted = append(formatted, gin.H{
			"id":           t.ID,
			"action":       t.Action,
			"actionLabel":  userTrackActionLabelCN(t.Action),
			"target":       target,
			"chapterTitle": chapterTitle,
			"createdAt":    t.CreatedAt,
			"timeAgo":      humanTimeAgoCN(createdAt),
		})
	}
	c.JSON(http.StatusOK, gin.H{"success": true, "tracks": formatted, "stats": stats, "total": len(formatted)})
}

// DBUserTracksList GET /api/db/users/tracks?userId=xxx&limit=20 管理端查看某用户行为轨迹
func DBUserTracksList(c *gin.Context) {
	userId := c.Query("userId")
	if userId == "" {
		c.JSON(http.StatusBadRequest, gin.H{"success": false, "error": "需要 userId"})
		return
	}
	limit, _ := strconv.Atoi(c.DefaultQuery("limit", "20"))
	if limit < 1 || limit > 100 {
		limit = 20
	}
	db := database.DB()
	var tracks []model.UserTrack
	db.Where("user_id = ?", userId).Order("created_at DESC").Limit(limit).Find(&tracks)
	titleMap := resolveChapterTitlesForTracks(db, tracks)
	out := make([]gin.H, 0, len(tracks))
	for _, t := range tracks {
		target := ""
		if t.Target != nil {
			target = *t.Target
		}
		chTitle := ""
		if t.ChapterID != nil {
			chTitle = titleMap[strings.TrimSpace(*t.ChapterID)]
		}
		if chTitle == "" && target != "" {
			chTitle = titleMap[strings.TrimSpace(target)]
		}
		var extra map[string]interface{}
		if len(t.ExtraData) > 0 {
			_ = json.Unmarshal(t.ExtraData, &extra)
		}
		module := ""
		if extra != nil {
			if m, ok := extra["module"].(string); ok {
				module = m
			}
		}
		var createdAt time.Time
		if t.CreatedAt != nil {
			createdAt = *t.CreatedAt
		}
		out = append(out, gin.H{
			"id": t.ID, "action": t.Action, "actionLabel": userTrackActionLabelCN(t.Action),
			"target": target, "chapterTitle": chTitle, "module": module,
			"createdAt": t.CreatedAt, "timeAgo": humanTimeAgoCN(createdAt),
		})
	}
	c.JSON(http.StatusOK, gin.H{"success": true, "tracks": out, "total": len(out)})
}

// GetUserRecentTracks 内部复用：获取用户最近 N 条有效行为的可读文字（用于 webhook 等）
func GetUserRecentTracks(db *gorm.DB, userId string, limit int) []string {
	if userId == "" || limit < 1 {
		return nil
	}
	var tracks []model.UserTrack
	db.Where("user_id = ?", userId).Order("created_at DESC").Limit(limit).Find(&tracks)
	titleMap := resolveChapterTitlesForTracks(db, tracks)
	lines := make([]string, 0, len(tracks))
	for _, t := range tracks {
		label := userTrackActionLabelCN(t.Action)
		target := ""
		if t.ChapterID != nil {
			if v := titleMap[strings.TrimSpace(*t.ChapterID)]; v != "" {
				target = v
			}
		}
		if target == "" && t.Target != nil {
			target = *t.Target
			if v := titleMap[strings.TrimSpace(target)]; v != "" {
				target = v
			}
		}
		var extra map[string]interface{}
		if len(t.ExtraData) > 0 {
			_ = json.Unmarshal(t.ExtraData, &extra)
		}
		module := ""
		if extra != nil {
			if m, ok := extra["module"].(string); ok {
				module = m
			}
		}
		var line string
		if target != "" {
			line = fmt.Sprintf("%s: %s", label, sanitizeDisplayOneLine(target))
		} else if module != "" {
			line = fmt.Sprintf("%s (%s)", label, module)
		} else {
			line = label
		}
		if t.CreatedAt != nil {
			line += " · " + humanTimeAgoCN(*t.CreatedAt)
		}
		lines = append(lines, line)
	}
	return lines
}

// UserTrackPost POST /api/user/track 记录行为（GORM）
func UserTrackPost(c *gin.Context) {
	var body struct {
		UserID    string      `json:"userId"`
		Phone     string      `json:"phone"`
		Action    string      `json:"action"`
		Target    string      `json:"target"`
		ExtraData interface{} `json:"extraData"`
	}
	if err := c.ShouldBindJSON(&body); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"success": false, "error": "请求体无效"})
		return
	}
	if body.UserID == "" && body.Phone == "" {
		c.JSON(http.StatusBadRequest, gin.H{"success": false, "error": "需要用户ID或手机号"})
		return
	}
	if body.Action == "" {
		c.JSON(http.StatusBadRequest, gin.H{"success": false, "error": "行为类型不能为空"})
		return
	}
	db := database.DB()
	userId := body.UserID
	if userId == "" {
		var u model.User
		if err := db.Where("phone = ?", body.Phone).First(&u).Error; err != nil {
			c.JSON(http.StatusOK, gin.H{"success": false, "error": "用户不存在"})
			return
		}
		userId = u.ID
	}
	trackID := fmt.Sprintf("track_%d", time.Now().UnixNano()%100000000)
	chID := body.Target
	if body.Action == "view_chapter" {
		chID = body.Target
	}
	t := model.UserTrack{
		ID: trackID, UserID: userId, Action: body.Action, Target: &body.Target,
	}
	if body.Target != "" {
		t.ChapterID = &chID
	}
	if body.ExtraData != nil {
		if raw, err := json.Marshal(body.ExtraData); err == nil {
			t.ExtraData = raw
		}
	}
	if err := db.Create(&t).Error; err != nil {
		c.JSON(http.StatusOK, gin.H{"success": false, "error": err.Error()})
		return
	}
	c.JSON(http.StatusOK, gin.H{"success": true, "trackId": trackID, "message": "行为记录成功"})
}

// MiniprogramTrackPost POST /api/miniprogram/track 小程序埋点（userId 可选，支持匿名）
func MiniprogramTrackPost(c *gin.Context) {
	var body struct {
		UserID    string      `json:"userId"`
		Action    string      `json:"action"`
		Target    string      `json:"target"`
		ExtraData interface{} `json:"extraData"`
	}
	if err := c.ShouldBindJSON(&body); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"success": false, "error": "请求体无效"})
		return
	}
	if body.Action == "" {
		c.JSON(http.StatusBadRequest, gin.H{"success": false, "error": "行为类型不能为空"})
		return
	}
	userId := body.UserID
	if userId == "" {
		userId = "anonymous"
	}
	db := database.DB()
	trackID := fmt.Sprintf("track_%d", time.Now().UnixNano()%100000000)
	chID := body.Target
	if body.Action == "view_chapter" && body.Target != "" {
		chID = body.Target
	}
	t := model.UserTrack{
		ID: trackID, UserID: userId, Action: body.Action, Target: &body.Target,
	}
	if body.Target != "" {
		t.ChapterID = &chID
	}
	if body.ExtraData != nil {
		if b, err := json.Marshal(body.ExtraData); err == nil {
			t.ExtraData = b
		}
	}
	if err := db.Create(&t).Error; err != nil {
		c.JSON(http.StatusOK, gin.H{"success": false, "error": err.Error()})
		return
	}
	c.JSON(http.StatusOK, gin.H{"success": true, "trackId": trackID, "message": "记录成功"})
}

// UserUpdate POST /api/user/update 更新昵称、头像、手机、微信号等
func UserUpdate(c *gin.Context) {
	var body struct {
		UserID   string  `json:"userId" binding:"required"`
		Nickname *string `json:"nickname"`
		Avatar   *string `json:"avatar"`
		Phone    *string `json:"phone"`
		Wechat   *string `json:"wechat"`
	}
	if err := c.ShouldBindJSON(&body); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"success": false, "message": "缺少用户ID"})
		return
	}
	updates := make(map[string]interface{})
	if body.Nickname != nil {
		updates["nickname"] = *body.Nickname
	}
	if body.Avatar != nil {
		updates["avatar"] = avatarToPath(*body.Avatar)
	}
	if body.Phone != nil {
		updates["phone"] = *body.Phone
	}
	if body.Wechat != nil {
		updates["wechat_id"] = *body.Wechat
	}
	if len(updates) == 0 {
		c.JSON(http.StatusBadRequest, gin.H{"success": false, "message": "没有需要更新的字段"})
		return
	}
	updates["updated_at"] = time.Now()
	if err := database.DB().Model(&model.User{}).Where("id = ?", body.UserID).Updates(updates).Error; err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"success": false, "message": "更新失败"})
		return
	}
	c.JSON(http.StatusOK, gin.H{"success": true, "message": "更新成功"})
}

// UserDashboardStats GET /api/miniprogram/user/dashboard-stats?userId=
// 小程序「我的」页聚合统计：已读章节列表、最近阅读、总阅读时长、匹配历史数
func UserDashboardStats(c *gin.Context) {
	userID := c.Query("userId")
	if userID == "" {
		c.JSON(http.StatusBadRequest, gin.H{"success": false, "error": "缺少 userId 参数"})
		return
	}

	db := database.DB()

	// 1. 拉取该用户所有阅读进度记录，按最近打开时间倒序
	var progressList []model.ReadingProgress
	if err := db.Where("user_id = ?", userID).Order("last_open_at DESC").Find(&progressList).Error; err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"success": false, "error": "读取阅读统计失败"})
		return
	}

	// 2. 按章节去重：已读数 = 不重复 section_id 数量；列表按「最近一次打开」倒序
	type secAgg struct {
		lastOpen time.Time
	}
	secMap := make(map[string]*secAgg)
	totalReadSeconds := 0
	for _, item := range progressList {
		totalReadSeconds += item.Duration
		sid := strings.TrimSpace(item.SectionID)
		if sid == "" {
			continue
		}
		var t time.Time
		if item.LastOpenAt != nil {
			t = *item.LastOpenAt
		} else if !item.UpdatedAt.IsZero() {
			t = item.UpdatedAt
		} else {
			t = item.CreatedAt
		}
		if agg, ok := secMap[sid]; ok {
			if t.After(agg.lastOpen) {
				agg.lastOpen = t
			}
		} else {
			secMap[sid] = &secAgg{lastOpen: t}
		}
	}

	// 2b. 已购买的章节（orders 表）也计入已读；用 pay_time 作为 lastOpen
	var purchasedRows []struct {
		ProductID string
		PayTime   *time.Time
	}
	db.Model(&model.Order{}).
		Select("product_id, pay_time").
		Where("user_id = ? AND product_type = 'section' AND status IN ? AND product_id IS NOT NULL AND product_id != ''",
			userID, []string{"paid", "completed", "success"}).
		Scan(&purchasedRows)
	for _, row := range purchasedRows {
		sid := strings.TrimSpace(row.ProductID)
		if sid == "" {
			continue
		}
		var pt time.Time
		if row.PayTime != nil {
			pt = *row.PayTime
		}
		if agg, ok := secMap[sid]; ok {
			if !pt.IsZero() && pt.After(agg.lastOpen) {
				agg.lastOpen = pt
			}
		} else {
			secMap[sid] = &secAgg{lastOpen: pt}
		}
	}

	readCount := len(secMap)
	sortedSectionIDs := make([]string, 0, len(secMap))
	for sid := range secMap {
		sortedSectionIDs = append(sortedSectionIDs, sid)
	}
	sort.Slice(sortedSectionIDs, func(i, j int) bool {
		return secMap[sortedSectionIDs[i]].lastOpen.After(secMap[sortedSectionIDs[j]].lastOpen)
	})
	readSectionIDs := sortedSectionIDs
	recentIDs := sortedSectionIDs
	if len(recentIDs) > 5 {
		recentIDs = recentIDs[:5]
	}

	// 不足 60 秒但有阅读记录时，至少显示 1 分钟
	totalReadMinutes := totalReadSeconds / 60
	if totalReadSeconds > 0 && totalReadMinutes == 0 {
		totalReadMinutes = 1
	}
	// 异常数据保护：历史 bug 导致累加错误可能产生超大值， cap 到 99999 分钟（约 69 天）
	if totalReadMinutes > 99999 {
		totalReadMinutes = 99999
	}

	// 3. 批量查 chapters 获取真实标题与 mid
	chapterMap := make(map[string]model.Chapter)
	if len(recentIDs) > 0 {
		var chapters []model.Chapter
		if err := db.Select("id", "mid", "section_title").Where("id IN ?", recentIDs).Find(&chapters).Error; err == nil {
			for _, ch := range chapters {
				chapterMap[ch.ID] = ch
			}
		}
	}

	// 按最近阅读顺序组装，标题 fallback 为 section_id
	recentChapters := make([]gin.H, 0, len(recentIDs))
	for _, id := range recentIDs {
		ch, ok := chapterMap[id]
		title := id
		mid := 0
		if ok {
			if ch.SectionTitle != "" {
				title = ch.SectionTitle
			}
			mid = ch.MID
		}
		recentChapters = append(recentChapters, gin.H{
			"id":    id,
			"mid":   mid,
			"title": title,
		})
	}

	// 4. 匹配历史数（该用户发起的匹配次数）
	var matchHistory int64
	db.Model(&model.MatchRecord{}).Where("user_id = ?", userID).Count(&matchHistory)

	// 5. 订单数 + 代付数
	var orderCount int64
	db.Model(&model.Order{}).Where("user_id = ? AND status IN ?", userID, []string{"paid", "completed", "success"}).Count(&orderCount)
	var giftPayCount int64
	db.Model(&model.Order{}).Where("user_id = ? AND product_type IN ? AND status IN ?", userID, []string{"gift_pay", "gift_pay_batch"}, []string{"paid", "completed", "success"}).Count(&giftPayCount)

	c.JSON(http.StatusOK, gin.H{
		"success": true,
		"data": gin.H{
			"readCount":        readCount,
			"totalReadMinutes": totalReadMinutes,
			"recentChapters":   recentChapters,
			"matchHistory":     matchHistory,
			"readSectionIds":   readSectionIDs,
			"orderCount":       orderCount,
			"giftPayCount":     giftPayCount,
		},
	})
}