package handler

import (
	"encoding/json"
	"net/http"
	"time"

	"soul-api/internal/database"

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

// AdminTrackStats GET /api/admin/track/stats 管理端-按钮/标签点击统计（按模块+action聚合）
// 查询参数：period=today|week|month|all（默认 today）
func AdminTrackStats(c *gin.Context) {
	period := c.DefaultQuery("period", "today")
	db := database.DB()

	now := time.Now()
	var since time.Time
	switch period {
	case "today":
		since = time.Date(now.Year(), now.Month(), now.Day(), 0, 0, 0, 0, now.Location())
	case "week":
		since = now.AddDate(0, 0, -7)
	case "month":
		since = now.AddDate(0, -1, 0)
	default:
		since = time.Time{}
	}

	type trackRow struct {
		Action    string `gorm:"column:action"`
		Target    string `gorm:"column:target"`
		ExtraData []byte `gorm:"column:extra_data"`
		Count     int64  `gorm:"column:count"`
	}

	query := db.Table("user_tracks").
		Select("action, COALESCE(target, '') as target, extra_data, COUNT(*) as count").
		Group("action, COALESCE(target, ''), extra_data").
		Order("count DESC")

	if !since.IsZero() {
		query = query.Where("created_at >= ?", since)
	}

	var rows []trackRow
	query.Find(&rows)

	type statItem struct {
		Action string `json:"action"`
		Target string `json:"target"`
		Module string `json:"module"`
		Page   string `json:"page"`
		Count  int64  `json:"count"`
	}

	byModule := make(map[string][]statItem)
	total := int64(0)

	for _, r := range rows {
		module := "other"
		page := ""
		if len(r.ExtraData) > 0 {
			var extra map[string]interface{}
			if json.Unmarshal(r.ExtraData, &extra) == nil {
				if m, ok := extra["module"].(string); ok && m != "" {
					module = m
				}
				if p, ok := extra["page"].(string); ok && p != "" {
					page = p
				}
			}
		}
		item := statItem{
			Action: r.Action,
			Target: r.Target,
			Module: module,
			Page:   page,
			Count:  r.Count,
		}
		byModule[module] = append(byModule[module], item)
		total += r.Count
	}

	c.JSON(http.StatusOK, gin.H{
		"success":  true,
		"period":   period,
		"total":    total,
		"byModule": byModule,
	})
}