package handler

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

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

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

// GetPublicDBConfig GET /api/miniprogram/config 公开接口，供小程序获取完整配置（与 next-project 对齐）
// 从 system_config 读取 free_chapters、mp_config、feature_config、chapter_config，合并后返回
func GetPublicDBConfig(c *gin.Context) {
	defaultFree := []string{"preface", "epilogue", "1.1", "appendix-1", "appendix-2", "appendix-3"}
	defaultPrices := gin.H{"section": float64(1), "fullbook": 9.9}
	defaultFeatures := gin.H{"matchEnabled": true, "referralEnabled": true, "searchEnabled": true, "aboutEnabled": true}
	defaultMp := gin.H{
		"appId": "wxb8bbb2b10dec74aa",
		"apiDomain": "https://soulapi.quwanzhi.com", // 保留以兼容线上旧版小程序（仍从 config 读取）
		"buyerDiscount": 5,
		"referralBindDays": 30,
		"minWithdraw": 10,
		"withdrawSubscribeTmplId": "u3MbZGPRkrZIk-I7QdpwzFxnO_CeQPaCWF2FkiIablE",
		"mchId": "1318592501",
	}

	out := gin.H{
		"success":      true,
		"freeChapters": defaultFree,
		"prices":       defaultPrices,
		"features":     defaultFeatures,
		"mpConfig":     defaultMp,
		"configs":      gin.H{}, // 兼容 miniprogram 备用格式 res.configs.feature_config
	}
	db := database.DB()

	keys := []string{"chapter_config", "free_chapters", "feature_config", "mp_config"}
	for _, k := range keys {
		var row model.SystemConfig
		if err := db.Where("config_key = ?", k).First(&row).Error; err != nil {
			continue
		}
		var val interface{}
		if err := json.Unmarshal(row.ConfigValue, &val); err != nil {
			continue
		}
		switch k {
		case "chapter_config":
			if m, ok := val.(map[string]interface{}); ok {
				if v, ok := m["freeChapters"].([]interface{}); ok && len(v) > 0 {
					arr := make([]string, 0, len(v))
					for _, x := range v {
						if s, ok := x.(string); ok {
							arr = append(arr, s)
						}
					}
					if len(arr) > 0 {
						out["freeChapters"] = arr
					}
				}
				if v, ok := m["prices"].(map[string]interface{}); ok {
					out["prices"] = v
				}
				if v, ok := m["features"].(map[string]interface{}); ok {
					out["features"] = v
				}
				out["configs"].(gin.H)["chapter_config"] = m
			}
		case "free_chapters":
			if arr, ok := val.([]interface{}); ok && len(arr) > 0 {
				ss := make([]string, 0, len(arr))
				for _, x := range arr {
					if s, ok := x.(string); ok {
						ss = append(ss, s)
					}
				}
				if len(ss) > 0 {
					out["freeChapters"] = ss
				}
				out["configs"].(gin.H)["free_chapters"] = arr
			}
		case "feature_config":
			if m, ok := val.(map[string]interface{}); ok {
				// 合并到 features，不整体覆盖以保留 chapter_config 里的
				cur := out["features"].(gin.H)
				for kk, vv := range m {
					cur[kk] = vv
				}
				out["configs"].(gin.H)["feature_config"] = m
			}
		case "mp_config":
			if m, ok := val.(map[string]interface{}); ok {
				// 合并默认值，DB 有则覆盖
				merged := make(gin.H)
				for k, v := range defaultMp {
					merged[k] = v
				}
				for k, v := range m {
					merged[k] = v
				}
				out["mpConfig"] = merged
				out["configs"].(gin.H)["mp_config"] = merged
			}
		}
	}
	// 好友优惠（用于 read 页展示优惠价）
	var refRow model.SystemConfig
	if err := db.Where("config_key = ?", "referral_config").First(&refRow).Error; err == nil {
		var refVal map[string]interface{}
		if err := json.Unmarshal(refRow.ConfigValue, &refVal); err == nil {
			if v, ok := refVal["userDiscount"].(float64); ok {
				out["userDiscount"] = v
			}
		}
	}
	if _, has := out["userDiscount"]; !has {
		out["userDiscount"] = float64(5)
	}
	c.JSON(http.StatusOK, out)
}

// DBConfigGet GET /api/db/config（管理端鉴权后同路径由 db 组处理时用）
func DBConfigGet(c *gin.Context) {
	key := c.Query("key")
	db := database.DB()
	var list []model.SystemConfig
	q := db.Table("system_config")
	if key != "" {
		q = q.Where("config_key = ?", key)
	}
	if err := q.Find(&list).Error; err != nil {
		c.JSON(http.StatusOK, gin.H{"success": false, "error": err.Error()})
		return
	}
	if key != "" && len(list) == 1 {
		var val interface{}
		_ = json.Unmarshal(list[0].ConfigValue, &val)
		c.JSON(http.StatusOK, gin.H{"success": true, "data": val})
		return
	}
	data := make([]gin.H, 0, len(list))
	for _, row := range list {
		var val interface{}
		_ = json.Unmarshal(row.ConfigValue, &val)
		data = append(data, gin.H{"configKey": row.ConfigKey, "configValue": val})
	}
	c.JSON(http.StatusOK, gin.H{"success": true, "data": data})
}

// AdminSettingsGet GET /api/admin/settings 系统设置页专用：仅返回免费章节、功能开关、站点/作者与价格、小程序配置
func AdminSettingsGet(c *gin.Context) {
	db := database.DB()
	defaultMp := gin.H{
		"appId": "wxb8bbb2b10dec74aa",
		"apiDomain": "https://soulapi.quwanzhi.com", // 保留以兼容线上旧版小程序
		"withdrawSubscribeTmplId": "u3MbZGPRkrZIk-I7QdpwzFxnO_CeQPaCWF2FkiIablE",
		"mchId": "1318592501",
		"minWithdraw": float64(10),
	}
	out := gin.H{
		"success":       true,
		"freeChapters":  []string{"preface", "epilogue", "1.1", "appendix-1", "appendix-2", "appendix-3"},
		"featureConfig": gin.H{"matchEnabled": true, "referralEnabled": true, "searchEnabled": true, "aboutEnabled": true},
		"siteSettings":  gin.H{"sectionPrice": float64(1), "baseBookPrice": 9.9, "distributorShare": float64(90), "authorInfo": gin.H{}},
		"mpConfig":      defaultMp,
	}
	keys := []string{"free_chapters", "feature_config", "site_settings", "mp_config"}
	for _, k := range keys {
		var row model.SystemConfig
		if err := db.Where("config_key = ?", k).First(&row).Error; err != nil {
			continue
		}
		var val interface{}
		if err := json.Unmarshal(row.ConfigValue, &val); err != nil {
			continue
		}
		switch k {
		case "free_chapters":
			if arr, ok := val.([]interface{}); ok && len(arr) > 0 {
				ss := make([]string, 0, len(arr))
				for _, x := range arr {
					if s, ok := x.(string); ok {
						ss = append(ss, s)
					}
				}
				if len(ss) > 0 {
					out["freeChapters"] = ss
				}
			}
		case "feature_config":
			if m, ok := val.(map[string]interface{}); ok && len(m) > 0 {
				out["featureConfig"] = m
			}
		case "site_settings":
			if m, ok := val.(map[string]interface{}); ok && len(m) > 0 {
				out["siteSettings"] = m
			}
		case "mp_config":
			if m, ok := val.(map[string]interface{}); ok {
				merged := make(gin.H)
				for k, v := range defaultMp {
					merged[k] = v
				}
				for k, v := range m {
					merged[k] = v
				}
				out["mpConfig"] = merged
			}
		}
	}
	c.JSON(http.StatusOK, out)
}

// AdminSettingsPost POST /api/admin/settings 系统设置页专用：一次性保存免费章节、功能开关、站点/作者与价格、小程序配置
func AdminSettingsPost(c *gin.Context) {
	var body struct {
		FreeChapters  []string               `json:"freeChapters"`
		FeatureConfig map[string]interface{} `json:"featureConfig"`
		SiteSettings  map[string]interface{} `json:"siteSettings"`
		MpConfig      map[string]interface{} `json:"mpConfig"`
	}
	if err := c.ShouldBindJSON(&body); err != nil {
		c.JSON(http.StatusOK, gin.H{"success": false, "error": "请求体无效"})
		return
	}
	db := database.DB()
	saveKey := func(key, desc string, value interface{}) error {
		valBytes, err := json.Marshal(value)
		if err != nil {
			return err
		}
		var row model.SystemConfig
		err = db.Where("config_key = ?", key).First(&row).Error
		if err != nil {
			row = model.SystemConfig{ConfigKey: key, ConfigValue: valBytes, Description: &desc}
			return db.Create(&row).Error
		}
		row.ConfigValue = valBytes
		if desc != "" {
			row.Description = &desc
		}
		return db.Save(&row).Error
	}
	if body.FreeChapters != nil {
		if err := saveKey("free_chapters", "免费章节ID列表", body.FreeChapters); err != nil {
			c.JSON(http.StatusOK, gin.H{"success": false, "error": "保存免费章节失败: " + err.Error()})
			return
		}
	}
	if body.FeatureConfig != nil {
		if err := saveKey("feature_config", "功能开关配置", body.FeatureConfig); err != nil {
			c.JSON(http.StatusOK, gin.H{"success": false, "error": "保存功能开关失败: " + err.Error()})
			return
		}
	}
	if body.SiteSettings != nil {
		if err := saveKey("site_settings", "站点与作者配置", body.SiteSettings); err != nil {
			c.JSON(http.StatusOK, gin.H{"success": false, "error": "保存站点设置失败: " + err.Error()})
			return
		}
	}
	if body.MpConfig != nil {
		if err := saveKey("mp_config", "小程序专用配置", body.MpConfig); err != nil {
			c.JSON(http.StatusOK, gin.H{"success": false, "error": "保存小程序配置失败: " + err.Error()})
			return
		}
	}
	c.JSON(http.StatusOK, gin.H{"success": true, "message": "设置已保存"})
}

// AdminReferralSettingsGet GET /api/admin/referral-settings 推广设置页专用：仅返回 referral_config
func AdminReferralSettingsGet(c *gin.Context) {
	db := database.DB()
	defaultConfig := gin.H{
		"distributorShare":   float64(90),
		"minWithdrawAmount":  float64(10),
		"bindingDays":        float64(30),
		"userDiscount":       float64(5),
		"withdrawFee":        float64(5),
		"enableAutoWithdraw": false,
	}
	var row model.SystemConfig
	if err := db.Where("config_key = ?", "referral_config").First(&row).Error; err != nil {
		c.JSON(http.StatusOK, gin.H{"success": true, "data": defaultConfig})
		return
	}
	var val map[string]interface{}
	if err := json.Unmarshal(row.ConfigValue, &val); err != nil || len(val) == 0 {
		c.JSON(http.StatusOK, gin.H{"success": true, "data": defaultConfig})
		return
	}
	c.JSON(http.StatusOK, gin.H{"success": true, "data": val})
}

// AdminReferralSettingsPost POST /api/admin/referral-settings 推广设置页专用：仅保存 referral_config（请求体为完整配置对象）
func AdminReferralSettingsPost(c *gin.Context) {
	var body struct {
		DistributorShare   float64 `json:"distributorShare"`
		MinWithdrawAmount  float64 `json:"minWithdrawAmount"`
		BindingDays        float64 `json:"bindingDays"`
		UserDiscount       float64 `json:"userDiscount"`
		WithdrawFee        float64 `json:"withdrawFee"`
		EnableAutoWithdraw bool    `json:"enableAutoWithdraw"`
	}
	if err := c.ShouldBindJSON(&body); err != nil {
		c.JSON(http.StatusOK, gin.H{"success": false, "error": "请求体无效"})
		return
	}
	val := gin.H{
		"distributorShare":   body.DistributorShare,
		"minWithdrawAmount":  body.MinWithdrawAmount,
		"bindingDays":       body.BindingDays,
		"userDiscount":      body.UserDiscount,
		"withdrawFee":       body.WithdrawFee,
		"enableAutoWithdraw": body.EnableAutoWithdraw,
	}
	valBytes, err := json.Marshal(val)
	if err != nil {
		c.JSON(http.StatusOK, gin.H{"success": false, "error": err.Error()})
		return
	}
	db := database.DB()
	desc := "分销 / 推广规则配置"
	var row model.SystemConfig
	if err := db.Where("config_key = ?", "referral_config").First(&row).Error; err != nil {
		row = model.SystemConfig{ConfigKey: "referral_config", ConfigValue: valBytes, Description: &desc}
		err = db.Create(&row).Error
	} else {
		row.ConfigValue = valBytes
		row.Description = &desc
		err = db.Save(&row).Error
	}
	if err != nil {
		c.JSON(http.StatusOK, gin.H{"success": false, "error": err.Error()})
		return
	}
	c.JSON(http.StatusOK, gin.H{"success": true, "message": "推广设置已保存"})
}

// DBConfigPost POST /api/db/config
func DBConfigPost(c *gin.Context) {
	var body struct {
		Key         string      `json:"key"`
		Value       interface{} `json:"value"`
		Description string      `json:"description"`
	}
	if err := c.ShouldBindJSON(&body); err != nil || body.Key == "" {
		c.JSON(http.StatusOK, gin.H{"success": false, "error": "配置键不能为空"})
		return
	}
	valBytes, err := json.Marshal(body.Value)
	if err != nil {
		c.JSON(http.StatusOK, gin.H{"success": false, "error": err.Error()})
		return
	}
	db := database.DB()
	desc := body.Description
	var row model.SystemConfig
	err = db.Where("config_key = ?", body.Key).First(&row).Error
	if err != nil {
		row = model.SystemConfig{ConfigKey: body.Key, ConfigValue: valBytes, Description: &desc}
		err = db.Create(&row).Error
	} else {
		row.ConfigValue = valBytes
		if body.Description != "" {
			row.Description = &desc
		}
		err = db.Save(&row).Error
	}
	if err != nil {
		c.JSON(http.StatusOK, gin.H{"success": false, "error": err.Error()})
		return
	}
	c.JSON(http.StatusOK, gin.H{"success": true, "message": "配置保存成功"})
}

// DBUsersList GET /api/db/users（支持分页 page、pageSize，可选搜索 search；购买状态、分销收益、绑定人数从订单/绑定表实时计算）
func DBUsersList(c *gin.Context) {
	db := database.DB()
	page, _ := strconv.Atoi(c.DefaultQuery("page", "1"))
	pageSize, _ := strconv.Atoi(c.DefaultQuery("pageSize", "10"))
	search := strings.TrimSpace(c.DefaultQuery("search", ""))
	vipFilter := c.Query("vip") // "true" 时仅返回 VIP（hasFullBook）
	if page < 1 {
		page = 1
	}
	if pageSize < 1 || pageSize > 100 {
		pageSize = 10
	}

	q := db.Model(&model.User{})
	if search != "" {
		pattern := "%" + search + "%"
		q = q.Where("COALESCE(nickname,'') LIKE ? OR COALESCE(phone,'') LIKE ? OR id LIKE ?", pattern, pattern, pattern)
	}
	if vipFilter == "true" || vipFilter == "1" {
		q = q.Where("id IN (SELECT user_id FROM orders WHERE product_type IN ? AND status = ?)",
			[]string{"fullbook", "vip"}, "paid")
	}
	var total int64
	q.Count(&total)

	var users []model.User
	query := db.Model(&model.User{})
	if search != "" {
		pattern := "%" + search + "%"
		query = query.Where("COALESCE(nickname,'') LIKE ? OR COALESCE(phone,'') LIKE ? OR id LIKE ?", pattern, pattern, pattern)
	}
	if vipFilter == "true" || vipFilter == "1" {
		query = query.Where("id IN (SELECT user_id FROM orders WHERE product_type IN ? AND status = ?)",
			[]string{"fullbook", "vip"}, "paid")
	}
	if err := query.Order("created_at DESC").
		Offset((page - 1) * pageSize).
		Limit(pageSize).
		Find(&users).Error; err != nil {
		c.JSON(http.StatusOK, gin.H{"success": false, "error": err.Error(), "users": []interface{}{}})
		return
	}
	totalPages := int(total) / pageSize
	if int(total)%pageSize > 0 {
		totalPages++
	}

	if len(users) == 0 {
		c.JSON(http.StatusOK, gin.H{
			"success": true, "users": users,
			"total": total, "page": page, "pageSize": pageSize, "totalPages": totalPages,
		})
		return
	}

	// 读取推广配置中的分销比例
	distributorShare := 0.9
	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); config["distributorShare"] != nil {
			if share, ok := config["distributorShare"].(float64); ok {
				distributorShare = share / 100
			}
		}
	}

	userIDs := make([]string, 0, len(users))
	for _, u := range users {
		userIDs = append(userIDs, u.ID)
	}

	// 1. 购买状态：全书已购、已付费章节数（从 orders 计算）
	hasFullBookMap := make(map[string]bool)
	sectionCountMap := make(map[string]int)
	var fullbookRows []struct {
		UserID string
	}
	db.Model(&model.Order{}).Select("user_id").Where("product_type IN ? AND status = ?", []string{"fullbook", "vip"}, "paid").Find(&fullbookRows)
	for _, r := range fullbookRows {
		hasFullBookMap[r.UserID] = true
	}
	var sectionRows []struct {
		UserID string
		Count  int64
	}
	db.Model(&model.Order{}).Select("user_id, COUNT(*) as count").
		Where("product_type = ? AND status = ?", "section", "paid").
		Group("user_id").Find(&sectionRows)
	for _, r := range sectionRows {
		sectionCountMap[r.UserID] = int(r.Count)
	}

	// 2. 分销收益：从 referrer 订单计算佣金；可提现 = 累计佣金 - 已提现 - 待处理提现
	referrerEarningsMap := make(map[string]float64)
	var referrerRows []struct {
		ReferrerID string
		Total      float64
	}
	db.Model(&model.Order{}).Select("referrer_id, COALESCE(SUM(amount), 0) as total").
		Where("referrer_id IS NOT NULL AND referrer_id != '' AND status = ?", "paid").
		Group("referrer_id").Find(&referrerRows)
	for _, r := range referrerRows {
		referrerEarningsMap[r.ReferrerID] = r.Total * distributorShare
	}
	withdrawnMap := make(map[string]float64)
	var withdrawnRows []struct {
		UserID string
		Total  float64
	}
	db.Model(&model.Withdrawal{}).Select("user_id, COALESCE(SUM(amount), 0) as total").
		Where("status = ?", "success").
		Group("user_id").Find(&withdrawnRows)
	for _, r := range withdrawnRows {
		withdrawnMap[r.UserID] = r.Total
	}
	pendingWithdrawMap := make(map[string]float64)
	var pendingRows []struct {
		UserID string
		Total  float64
	}
	db.Model(&model.Withdrawal{}).Select("user_id, COALESCE(SUM(amount), 0) as total").
		Where("status IN ?", []string{"pending", "processing", "pending_confirm"}).
		Group("user_id").Find(&pendingRows)
	for _, r := range pendingRows {
		pendingWithdrawMap[r.UserID] = r.Total
	}

	// 3. 绑定人数：从 referral_bindings 计算
	referralCountMap := make(map[string]int)
	var refCountRows []struct {
		ReferrerID string
		Count      int64
	}
	db.Model(&model.ReferralBinding{}).Select("referrer_id, COUNT(*) as count").
		Group("referrer_id").Find(&refCountRows)
	for _, r := range refCountRows {
		referralCountMap[r.ReferrerID] = int(r.Count)
	}

	// 填充每个用户的实时计算字段
	for i := range users {
		uid := users[i].ID
		// 购买状态
		users[i].HasFullBook = ptrBool(hasFullBookMap[uid])
		users[i].PurchasedSectionCount = sectionCountMap[uid]
		// 分销收益
		totalE := referrerEarningsMap[uid]
		withdrawn := withdrawnMap[uid]
		pendingWd := pendingWithdrawMap[uid]
		available := totalE - withdrawn - pendingWd
		if available < 0 {
			available = 0
		}
		users[i].Earnings = ptrFloat64(totalE)
		users[i].PendingEarnings = ptrFloat64(available)
		users[i].ReferralCount = ptrInt(referralCountMap[uid])
	}

	c.JSON(http.StatusOK, gin.H{
		"success": true, "users": users,
		"total": total, "page": page, "pageSize": pageSize, "totalPages": totalPages,
	})
}

func ptrBool(b bool) *bool       { return &b }
func ptrFloat64(f float64) *float64 { v := f; return &v }
func ptrInt(n int) *int       { return &n }

// DBUsersAction POST /api/db/users（创建）、PUT /api/db/users（更新）
func DBUsersAction(c *gin.Context) {
	db := database.DB()
	if c.Request.Method == http.MethodPost {
		var body struct {
			OpenID    *string `json:"openId"`
			Phone     *string `json:"phone"`
			Nickname  *string `json:"nickname"`
			WechatID  *string `json:"wechatId"`
			Avatar    *string `json:"avatar"`
			IsAdmin   *bool   `json:"isAdmin"`
		}
		if err := c.ShouldBindJSON(&body); err != nil {
			c.JSON(http.StatusOK, gin.H{"success": false, "error": "请求体无效"})
			return
		}
		userID := "user_" + randomSuffix()
		code := "SOUL" + randomSuffix()[:4]
		nick := "用户"
		if body.Nickname != nil && *body.Nickname != "" {
			nick = *body.Nickname
		} else {
			nick = nick + userID[len(userID)-4:]
		}
		u := model.User{
			ID: userID, Nickname: &nick, ReferralCode: &code,
			OpenID: body.OpenID, Phone: body.Phone, WechatID: body.WechatID, Avatar: body.Avatar,
		}
		if body.IsAdmin != nil {
			u.IsAdmin = body.IsAdmin
		}
		if err := db.Create(&u).Error; err != nil {
			c.JSON(http.StatusOK, gin.H{"success": false, "error": err.Error()})
			return
		}
		c.JSON(http.StatusOK, gin.H{"success": true, "user": u, "isNew": true, "message": "用户创建成功"})
		return
	}
	// PUT 更新
	var body struct {
		ID               string    `json:"id"`
		Nickname         *string   `json:"nickname"`
		Phone            *string   `json:"phone"`
		WechatID         *string   `json:"wechatId"`
		Avatar           *string   `json:"avatar"`
		HasFullBook      *bool     `json:"hasFullBook"`
		IsAdmin          *bool     `json:"isAdmin"`
		Earnings         *float64  `json:"earnings"`
		PendingEarnings  *float64  `json:"pendingEarnings"`
	}
	if err := c.ShouldBindJSON(&body); err != nil || body.ID == "" {
		c.JSON(http.StatusOK, gin.H{"success": false, "error": "用户ID不能为空"})
		return
	}
	updates := map[string]interface{}{}
	if body.Nickname != nil {
		updates["nickname"] = *body.Nickname
	}
	if body.Phone != nil {
		updates["phone"] = *body.Phone
	}
	if body.WechatID != nil {
		updates["wechat_id"] = *body.WechatID
	}
	if body.Avatar != nil {
		updates["avatar"] = *body.Avatar
	}
	if body.HasFullBook != nil {
		updates["has_full_book"] = *body.HasFullBook
	}
	if body.IsAdmin != nil {
		updates["is_admin"] = *body.IsAdmin
	}
	if body.Earnings != nil {
		updates["earnings"] = *body.Earnings
	}
	if body.PendingEarnings != nil {
		updates["pending_earnings"] = *body.PendingEarnings
	}
	if len(updates) == 0 {
		c.JSON(http.StatusOK, gin.H{"success": true, "message": "没有需要更新的字段"})
		return
	}
	if err := db.Model(&model.User{}).Where("id = ?", body.ID).Updates(updates).Error; err != nil {
		c.JSON(http.StatusOK, gin.H{"success": false, "error": err.Error()})
		return
	}
	c.JSON(http.StatusOK, gin.H{"success": true, "message": "用户更新成功"})
}

func randomSuffix() string {
	return fmt.Sprintf("%d%x", time.Now().UnixNano()%100000, time.Now().UnixNano()&0xfff)
}

// DBUsersDelete DELETE /api/db/users
func DBUsersDelete(c *gin.Context) {
	id := c.Query("id")
	if id == "" {
		c.JSON(http.StatusOK, gin.H{"success": false, "error": "用户ID不能为空"})
		return
	}
	if err := database.DB().Where("id = ?", id).Delete(&model.User{}).Error; err != nil {
		c.JSON(http.StatusOK, gin.H{"success": false, "error": err.Error()})
		return
	}
	c.JSON(http.StatusOK, gin.H{"success": true, "message": "用户删除成功"})
}

// DBUsersReferrals GET /api/db/users/referrals（绑定关系详情弹窗；收益与「已付费」与小程序口径一致：订单+提现表实时计算）
func DBUsersReferrals(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()

	// 分销比例（与小程序 /api/miniprogram/earnings、支付回调一致）
	distributorShare := 0.9
	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); config["distributorShare"] != nil {
			if share, ok := config["distributorShare"].(float64); ok {
				distributorShare = share / 100
			}
		}
	}

	var bindings []model.ReferralBinding
	if err := db.Where("referrer_id = ?", userId).Order("binding_date DESC").Find(&bindings).Error; err != nil {
		c.JSON(http.StatusOK, gin.H{"success": true, "referrals": []interface{}{}, "stats": gin.H{"total": 0, "purchased": 0, "free": 0, "earnings": 0, "pendingEarnings": 0, "withdrawnEarnings": 0}})
		return
	}
	refereeIds := make([]string, 0, len(bindings))
	for _, b := range bindings {
		refereeIds = append(refereeIds, b.RefereeID)
	}
	var users []model.User
	if len(refereeIds) > 0 {
		db.Where("id IN ?", refereeIds).Find(&users)
	}
	userMap := make(map[string]*model.User)
	for i := range users {
		userMap[users[i].ID] = &users[i]
	}
	referrals := make([]gin.H, 0, len(bindings))
	for _, b := range bindings {
		u := userMap[b.RefereeID]
		nick := "微信用户"
		var avatar *string
		var phone *string
		hasFullBook := false
		if u != nil {
			if u.Nickname != nil {
				nick = *u.Nickname
			}
			avatar, phone = u.Avatar, u.Phone
			if u.HasFullBook != nil {
				hasFullBook = *u.HasFullBook
			}
		}
		status := "active"
		if b.Status != nil {
			status = *b.Status
		}
		daysRemaining := 0
		if b.ExpiryDate.After(time.Now()) {
			daysRemaining = int(b.ExpiryDate.Sub(time.Now()).Hours() / 24)
		}
		// 已付费：与小程序一致，以绑定记录的 purchase_count > 0 为准（支付回调会更新该字段）
		hasPaid := b.PurchaseCount != nil && *b.PurchaseCount > 0
		displayStatus := bindingStatusDisplay(hasPaid, hasFullBook) // vip | paid | free，供前端徽章展示
		referrals = append(referrals, gin.H{
			"id": b.RefereeID, "nickname": nick, "avatar": avatar, "phone": phone,
			"hasFullBook": hasFullBook || status == "converted",
			"purchasedSections": getBindingPurchaseCount(b),
			"createdAt": b.BindingDate, "bindingStatus": status, "daysRemaining": daysRemaining, "commission": b.TotalCommission,
			"status": displayStatus,
		})
	}

	// 累计收益、待提现：与小程序 MyEarnings 一致，从订单+提现表实时计算
	var orderSum struct{ Total float64 }
	db.Model(&model.Order{}).Select("COALESCE(SUM(amount), 0) as total").
		Where("referrer_id = ? AND status = ?", userId, "paid").
		Scan(&orderSum)
	earningsE := orderSum.Total * distributorShare

	var withdrawnSum struct{ Total float64 }
	db.Model(&model.Withdrawal{}).Select("COALESCE(SUM(amount), 0) as total").
		Where("user_id = ? AND status = ?", userId, "success").
		Scan(&withdrawnSum)
	withdrawnE := withdrawnSum.Total

	var pendingWdSum struct{ Total float64 }
	db.Model(&model.Withdrawal{}).Select("COALESCE(SUM(amount), 0) as total").
		Where("user_id = ? AND status IN ?", userId, []string{"pending", "processing", "pending_confirm"}).
		Scan(&pendingWdSum)
	availableE := earningsE - withdrawnE - pendingWdSum.Total
	if availableE < 0 {
		availableE = 0
	}

	// 已付费人数：与小程序一致，绑定中 purchase_count > 0 的条数
	purchased := 0
	for _, b := range bindings {
		if b.PurchaseCount != nil && *b.PurchaseCount > 0 {
			purchased++
		}
	}

	c.JSON(http.StatusOK, gin.H{
		"success": true, "referrals": referrals,
		"stats": gin.H{
			"total": len(bindings), "purchased": purchased, "free": len(bindings) - purchased,
			"earnings": roundFloat(earningsE, 2), "pendingEarnings": roundFloat(availableE, 2), "withdrawnEarnings": roundFloat(withdrawnE, 2),
		},
	})
}

func getBindingPurchaseCount(b model.ReferralBinding) int {
	if b.PurchaseCount == nil {
		return 0
	}
	return *b.PurchaseCount
}

func bindingStatusDisplay(hasPaid bool, hasFullBook bool) string {
	if hasFullBook {
		return "vip"
	}
	if hasPaid {
		return "paid"
	}
	return "free"
}

func roundFloat(v float64, prec int) float64 {
	ratio := 1.0
	for i := 0; i < prec; i++ {
		ratio *= 10
	}
	return float64(int(v*ratio+0.5)) / ratio
}

// DBInit POST /api/db/init
func DBInit(c *gin.Context) {
	c.JSON(http.StatusOK, gin.H{"success": true, "data": gin.H{"message": "初始化接口已就绪（表结构由迁移维护）"}})
}

// DBDistribution GET /api/db/distribution（支持分页 page、pageSize，筛选 status、search）
func DBDistribution(c *gin.Context) {
	userId := c.Query("userId")
	page, _ := strconv.Atoi(c.DefaultQuery("page", "1"))
	pageSize, _ := strconv.Atoi(c.DefaultQuery("pageSize", "10"))
	statusFilter := c.Query("status")
	if page < 1 {
		page = 1
	}
	if pageSize < 1 || pageSize > 100 {
		pageSize = 10
	}

	db := database.DB()
	q := db.Model(&model.ReferralBinding{})
	if userId != "" {
		q = q.Where("referrer_id = ?", userId)
	}
	if statusFilter != "" && statusFilter != "all" {
		q = q.Where("status = ?", statusFilter)
	}
	var total int64
	q.Count(&total)

	var bindings []model.ReferralBinding
	query := db.Model(&model.ReferralBinding{}).Order("binding_date DESC")
	if userId != "" {
		query = query.Where("referrer_id = ?", userId)
	}
	if statusFilter != "" && statusFilter != "all" {
		query = query.Where("status = ?", statusFilter)
	}
	if err := query.Offset((page-1)*pageSize).Limit(pageSize).Find(&bindings).Error; err != nil {
		c.JSON(http.StatusOK, gin.H{"success": true, "bindings": []interface{}{}, "total": 0, "page": page, "pageSize": pageSize, "totalPages": 0})
		return
	}
	referrerIds := make(map[string]bool)
	refereeIds := make(map[string]bool)
	for _, b := range bindings {
		referrerIds[b.ReferrerID] = true
		refereeIds[b.RefereeID] = true
	}
	allIds := make([]string, 0, len(referrerIds)+len(refereeIds))
	for id := range referrerIds {
		allIds = append(allIds, id)
	}
	for id := range refereeIds {
		if !referrerIds[id] {
			allIds = append(allIds, id)
		}
	}
	var users []model.User
	if len(allIds) > 0 {
		db.Where("id IN ?", allIds).Find(&users)
	}
	userMap := make(map[string]*model.User)
	for i := range users {
		userMap[users[i].ID] = &users[i]
	}
	getStr := func(s *string) string {
		if s == nil || *s == "" {
			return ""
		}
		return *s
	}
	out := make([]gin.H, 0, len(bindings))
	for _, b := range bindings {
		refNick := "微信用户"
		var refereePhone, refereeAvatar *string
		if u := userMap[b.RefereeID]; u != nil {
			if u.Nickname != nil && *u.Nickname != "" {
				refNick = *u.Nickname
			} else {
				refNick = "微信用户"
			}
			refereePhone = u.Phone
			refereeAvatar = u.Avatar
		}
		var referrerName, referrerAvatar *string
		if u := userMap[b.ReferrerID]; u != nil {
			referrerName = u.Nickname
			referrerAvatar = u.Avatar
		}
		days := 0
		if b.ExpiryDate.After(time.Now()) {
			days = int(b.ExpiryDate.Sub(time.Now()).Hours() / 24)
		}
		// 佣金展示用累计佣金 total_commission（支付回调累加），无则用 commission_amount
		commissionVal := b.TotalCommission
		if commissionVal == nil {
			commissionVal = b.CommissionAmount
		}
		statusVal := ""
		if b.Status != nil {
			statusVal = *b.Status
		}
		out = append(out, gin.H{
			"id": b.ID, "referrerId": b.ReferrerID, "referrerName": getStr(referrerName), "referrerCode": b.ReferralCode, "referrerAvatar": getStr(referrerAvatar),
			"refereeId": b.RefereeID, "refereeNickname": refNick, "refereePhone": getStr(refereePhone), "refereeAvatar": getStr(refereeAvatar),
			"boundAt": b.BindingDate, "expiresAt": b.ExpiryDate, "status": statusVal,
			"daysRemaining": days, "commission": commissionVal, "totalCommission": commissionVal, "source": "miniprogram",
		})
	}
	totalPages := int(total) / pageSize
	if int(total)%pageSize > 0 {
		totalPages++
	}
	c.JSON(http.StatusOK, gin.H{
		"success": true, "bindings": out,
		"total": total, "page": page, "pageSize": pageSize, "totalPages": totalPages,
	})
}

// DBChapters GET/POST /api/db/chapters
func DBChapters(c *gin.Context) {
	var list []model.Chapter
	if err := database.DB().Order("sort_order ASC, id ASC").Find(&list).Error; err != nil {
		c.JSON(http.StatusOK, gin.H{"success": false, "error": err.Error(), "data": []interface{}{}})
		return
	}
	c.JSON(http.StatusOK, gin.H{"success": true, "data": list})
}

// DBConfigDelete DELETE /api/db/config
func DBConfigDelete(c *gin.Context) {
	key := c.Query("key")
	if key == "" {
		c.JSON(http.StatusOK, gin.H{"success": false, "error": "配置键不能为空"})
		return
	}
	if err := database.DB().Where("config_key = ?", key).Delete(&model.SystemConfig{}).Error; err != nil {
		c.JSON(http.StatusOK, gin.H{"success": false, "error": err.Error()})
		return
	}
	c.JSON(http.StatusOK, gin.H{"success": true})
}

// DBInitGet GET /api/db/init
func DBInitGet(c *gin.Context) {
	c.JSON(http.StatusOK, gin.H{"success": true, "data": gin.H{"message": "ok"}})
}

// DBMigrateGet GET /api/db/migrate
func DBMigrateGet(c *gin.Context) {
	c.JSON(http.StatusOK, gin.H{"success": true, "message": "迁移状态查询（由 Prisma/外部维护）"})
}

// DBMigratePost POST /api/db/migrate
func DBMigratePost(c *gin.Context) {
	c.JSON(http.StatusOK, gin.H{"success": true, "message": "迁移由 Prisma/外部执行"})
}