package handler

import (
	"net/http"
	"strconv"

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

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

// DBMatchRecordsList GET /api/db/match-records 管理端-匹配记录列表（分页、按类型筛选）
// 当 ?stats=true 时返回汇总统计（总匹配数、今日匹配、按类型分布、独立用户数）
func DBMatchRecordsList(c *gin.Context) {
	db := database.DB()

	if c.Query("stats") == "true" {
		var totalMatches int64
		db.Model(&model.MatchRecord{}).Count(&totalMatches)
		var todayMatches int64
		db.Model(&model.MatchRecord{}).Where("created_at >= CURDATE()").Count(&todayMatches)
		type TypeCount struct {
			MatchType string `json:"matchType"`
			Count     int64  `json:"count"`
		}
		var byType []TypeCount
		db.Model(&model.MatchRecord{}).Select("match_type as match_type, count(*) as count").Group("match_type").Scan(&byType)
		var uniqueUsers int64
		db.Model(&model.MatchRecord{}).Distinct("user_id").Count(&uniqueUsers)
		c.JSON(http.StatusOK, gin.H{
			"success": true,
			"data": gin.H{
				"totalMatches": totalMatches,
				"todayMatches": todayMatches,
				"byType":       byType,
				"uniqueUsers":  uniqueUsers,
			},
		})
		return
	}

	page, _ := strconv.Atoi(c.DefaultQuery("page", "1"))
	pageSize, _ := strconv.Atoi(c.DefaultQuery("pageSize", "10"))
	matchType := c.Query("matchType")
	if page < 1 {
		page = 1
	}
	if pageSize < 1 || pageSize > 100 {
		pageSize = 10
	}

	q := db.Model(&model.MatchRecord{})
	if matchType != "" {
		q = q.Where("match_type = ?", matchType)
	}
	var total int64
	q.Count(&total)

	var records []model.MatchRecord
	if err := q.Order("created_at DESC").Offset((page - 1) * pageSize).Limit(pageSize).Find(&records).Error; err != nil {
		c.JSON(http.StatusOK, gin.H{"success": false, "error": err.Error(), "records": []interface{}{}})
		return
	}

	userIDs := make(map[string]bool)
	for _, r := range records {
		userIDs[r.UserID] = true
		userIDs[r.MatchedUserID] = true
	}
	ids := make([]string, 0, len(userIDs))
	for id := range userIDs {
		ids = append(ids, id)
	}
	var users []model.User
	if len(ids) > 0 {
		database.DB().Where("id IN ?", ids).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 {
			return ""
		}
		return *s
	}

	out := make([]gin.H, 0, len(records))
	for _, r := range records {
		u := userMap[r.UserID]
		mu := userMap[r.MatchedUserID]
		userAvatar := ""
		matchedUserAvatar := ""
		if u != nil && u.Avatar != nil {
			userAvatar = *u.Avatar
		}
		if mu != nil && mu.Avatar != nil {
			matchedUserAvatar = *mu.Avatar
		}
		out = append(out, gin.H{
			"id": r.ID, "userId": r.UserID, "matchedUserId": r.MatchedUserID,
			"matchType": r.MatchType, "phone": getStr(r.Phone), "wechatId": getStr(r.WechatID),
			"userNickname":     getStr(u.Nickname),
			"matchedNickname":  getStr(mu.Nickname),
			"userAvatar":       userAvatar,
			"matchedUserAvatar": matchedUserAvatar,
			"matchScore":       r.MatchScore,
			"createdAt":        r.CreatedAt,
		})
	}

	totalPages := int(total) / pageSize
	if int(total)%pageSize > 0 {
		totalPages++
	}
	c.JSON(http.StatusOK, gin.H{
		"success": true, "records": out,
		"total": total, "page": page, "pageSize": pageSize, "totalPages": totalPages,
	})
}