// 首页聚合数据接口
package app

import (
	"simple-memo/global"
	"simple-memo/models"
	"simple-memo/utils"
	"time"

	"gorm.io/gorm"

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

// -------------------------- 1. 定义 Handler 接口 --------------------------
type DashboardHandler interface {
	DailyDashboard(c *gin.Context) // 首页聚合数据
}

// -------------------------- 2. 实现结构体 --------------------------
type dashboardHandler struct {
	db *gorm.DB
}

func NewDashboardHandler() DashboardHandler {
	return &dashboardHandler{
		db: global.DB,
	}
}

// -------------------------- 3. 请求结构体 --------------------------
type DailyDashboardReq struct {
	Date string `json:"date"` // YYYY-MM-DD，不传默认今天
}

// -------------------------- 4. 接口实现 --------------------------

// DailyDashboard 首页聚合数据
func (h *dashboardHandler) DailyDashboard(c *gin.Context) {
	userID := c.GetUint("userID")
	var req DailyDashboardReq

	if err := c.ShouldBindJSON(&req); err != nil {
		utils.Fail(c, "参数解析失败")
		return
	}

	// 日期处理
	var targetDate string
	if req.Date == "" {
		targetDate = time.Now().Format("2006-01-02")
	} else {
		targetDate = req.Date
	}

	// ========== 1. 待办数据 ==========
	var todoTotal, todoDone, todoUndone int64
	h.db.Model(&models.Todo{}).
		Where("user_id = ? AND date = ?", userID, targetDate).
		Count(&todoTotal)
	h.db.Model(&models.Todo{}).
		Where("user_id = ? AND date = ? AND done = 1", userID, targetDate).
		Count(&todoDone)
	todoUndone = todoTotal - todoDone

	// 待办列表（最近3条）
	var todoList []models.Todo
	h.db.Model(&models.Todo{}).
		Where("user_id = ? AND date = ?", userID, targetDate).
		Order("priority ASC, id ASC").
		Limit(3).
		Find(&todoList)

	todoData := gin.H{
		"total":  todoTotal,
		"done":   todoDone,
		"undone": todoUndone,
		"list":   todoList,
	}

	// ========== 2. 账单数据 ==========
	var billExpend, billIncome float64
	h.db.Model(&models.Bill{}).
		Where("user_id = ? AND date = ? AND type = 1", userID, targetDate).
		Select("COALESCE(SUM(money), 0)").Scan(&billExpend)
	h.db.Model(&models.Bill{}).
		Where("user_id = ? AND date = ? AND type = 2", userID, targetDate).
		Select("COALESCE(SUM(money), 0)").Scan(&billIncome)

	// 账单列表（最近3条）
	var billList []models.Bill
	h.db.Model(&models.Bill{}).
		Where("user_id = ? AND date = ?", userID, targetDate).
		Order("id DESC").
		Limit(3).
		Find(&billList)

	billData := gin.H{
		"expend":  billExpend,
		"income":  billIncome,
		"balance": billIncome - billExpend,
		"list":    billList,
	}

	// ========== 3. 心情数据 ==========
	type MoodResult struct {
		ID              uint   `json:"id"`
		Date            string `json:"date"`
		Emoji           string `json:"emoji"`
		Content         string `json:"content"`
		AIStatus        int    `json:"ai_status"`
		AIText          string `json:"ai_text"`
		AIImageURL      string `json:"ai_image_url"`
		AIGenerateCount int    `json:"ai_generate_count"`
	}

	var moodResult MoodResult
	h.db.Model(&models.Mood{}).
		Select(`
			sm_mood.id,
			sm_mood.date,
			sm_mood.emoji,
			sm_mood.content,
			COALESCE(sm_mood_ai_generations.status, 0) as ai_status,
			COALESCE(sm_mood_ai_generations.ai_text, '') as ai_text,
			COALESCE(sm_mood_ai_generations.ai_image_url, '') as ai_image_url,
			COALESCE(sm_mood_ai_generations.generate_count, 0) as ai_generate_count
		`).
		Joins("LEFT JOIN sm_mood_ai_generations ON sm_mood.id = sm_mood_ai_generations.mood_id").
		Where("sm_mood.user_id = ? AND sm_mood.date = ?", userID, targetDate).
		Scan(&moodResult)

	moodData := gin.H{
		"recorded":     moodResult.ID > 0,
		"emoji":        moodResult.Emoji,
		"content":      moodResult.Content,
		"ai_generated": moodResult.AIStatus == 2,
		"ai_text":      moodResult.AIText,
	}
	if moodResult.ID == 0 {
		moodData = gin.H{
			"recorded":     false,
			"emoji":        "",
			"content":      "",
			"ai_generated": false,
			"ai_text":      "",
		}
	}

	// ========== 4. 复盘数据 ==========
	var review models.Review
	err := h.db.Where("user_id = ? AND date = ?", userID, targetDate).First(&review).Error
	reviewData := gin.H{
		"recorded": err == nil,
		"method":   "kpt",
	}
	if err == nil {
		reviewData["id"] = review.ID
		reviewData["keep"] = review.Keep
		reviewData["problem"] = review.Problem
		reviewData["try"] = review.Try
		// 生成简短摘要
		summary := ""
		if review.Keep != "" {
			s := review.Keep
			if len(s) > 30 {
				s = s[:30] + "..."
			}
			summary = s
		}
		reviewData["summary"] = summary
	}

	// ========== 5. 成长数据 ==========
	growthHandler := NewGrowthHandler()
	growthInfo := growthHandler.GetGrowthInfoInternal(userID)

	growthData := gin.H{
		"todayExp":    0, // 今日经验，需要从 ExpChangeLog 查询
		"maxDailyExp": 120,
		"streakDays":  growthInfo["streak_days"],
	}

	// 查询今日经验
	var todayExp int
	today := time.Now().Format("2006-01-02")
	if targetDate == today {
		h.db.Model(&models.ExpChangeLog{}).
			Where("user_id = ? AND DATE(created_at) = ?", userID, today).
			Select("COALESCE(SUM(exp), 0)").
			Scan(&todayExp)
		growthData["todayExp"] = todayExp
	}

	// ========== 组装结果 ==========
	result := gin.H{
		"date":   targetDate,
		"todo":   todoData,
		"bill":   billData,
		"mood":   moodData,
		"review": reviewData,
		"growth": growthData,
	}

	utils.Ok(c, result)
}