// api/app/calendar.go
// 日历数据聚合接口
package app

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

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

type CalendarHandler struct {
	db *gorm.DB
}

func NewCalendarHandler() *CalendarHandler {
	return &CalendarHandler{db: global.DB}
}

// CalendarDayData 单日数据
type CalendarDayData struct {
	Todo       bool `json:"todo"`        // 有待办
	TodoDone   bool `json:"todo_done"`   // 待办全部完成
	TodoUndone bool `json:"todo_undone"` // 有待办未完成
	Mood       bool `json:"mood"`        // 有心情
	Bill       bool `json:"bill"`        // 有账单
}

// GetCalendarData 获取日历数据（按日期聚合）
func (h *CalendarHandler) GetCalendarData(c *gin.Context) {
	year := time.Now().Year()
	month := int(time.Now().Month())

	// 尝试从请求体获取年月
	var req struct {
		Year  int `json:"year"`
		Month int `json:"month"`
	}
	c.ShouldBindJSON(&req)
	if req.Year > 0 {
		year = req.Year
	}
	if req.Month > 0 && req.Month <= 12 {
		month = req.Month
	}

	userID := c.GetUint("userID")

	// 计算月份范围
	startDate := fmt.Sprintf("%d-%02d-01", year, month)
	_, lastDay := utils.GetMonthLastDay(year, month)
	endDate := fmt.Sprintf("%d-%02d-%02d", year, month, lastDay)

	// 初始化结果
	calendarData := make(map[string]*CalendarDayData)

	// 1. 查询待办数据（按日期分组，检查是否有未完成）
	var todos []models.Todo
	h.db.Where("user_id = ? AND date BETWEEN ? AND ?", userID, startDate, endDate).
		Find(&todos)

	// 按日期聚合待办状态
	todoByDate := make(map[string]struct {
		HasTodo   bool
		AllDone   bool
		HasUndone bool
	})

	for _, todo := range todos {
		date := todo.Date
		status := todoByDate[date]
		status.HasTodo = true
		if todo.Done == 1 {
			if !status.HasUndone {
				status.AllDone = true
			}
		} else {
			status.HasUndone = true
			status.AllDone = false
		}
		todoByDate[date] = status
	}

	for date, status := range todoByDate {
		if calendarData[date] == nil {
			calendarData[date] = &CalendarDayData{}
		}
		calendarData[date].Todo = status.HasTodo
		calendarData[date].TodoDone = status.AllDone
		calendarData[date].TodoUndone = status.HasUndone
	}

	// 2. 查询心情数据
	var moodDates []string
	h.db.Model(&models.Mood{}).
		Where("user_id = ? AND date BETWEEN ? AND ?", userID, startDate, endDate).
		Pluck("DISTINCT date", &moodDates).Find(&moodDates)
	for _, date := range moodDates {
		if calendarData[date] == nil {
			calendarData[date] = &CalendarDayData{}
		}
		calendarData[date].Mood = true
	}

	// 3. 查询账单数据
	var billDates []string
	h.db.Model(&models.Bill{}).
		Where("user_id = ? AND date BETWEEN ? AND ?", userID, startDate, endDate).
		Pluck("DISTINCT date", &moodDates).Find(&billDates)
	for _, date := range billDates {
		if calendarData[date] == nil {
			calendarData[date] = &CalendarDayData{}
		}
		calendarData[date].Bill = true
	}

	utils.Ok(c, calendarData)
}