package item

import (
	"errors"
	"fmt"
	"go.uber.org/zap"
	"gorm.io/gorm"
	"math"
	"server/dao"
	"server/global"
	"server/model"
	"server/model/item/request"
	"time"
)

type BluetoothService struct {
}

func HandleTempScanDeviceData(bv model.BeaconValue) {
	// 查询网关
	var gw dao.Gateway
	global.GVA_DB.Where("device_name = ?", bv.DeviceName).First(&gw)
	// 组装临时记录
	temp := dao.TempScanDevice{
		GatewayID:   gw.ID,
		GatewaySN:   bv.DeviceName,
		AreaNo:      bv.Area,
		ClusterNo:   bv.Cluster,
		Number:      bv.Number,
		UUID:        bv.UUID,
		FirmwareVer: bv.Version,
		DeviceType:  "lamp",
		IsSelected:  0,
		ScanTime:    time.Now(),
	}
	// 同网关+UUID自动覆盖旧扫描记录
	global.GVA_DB.Where("gateway_id = ? AND uuid = ?", gw.ID, temp.UUID).Assign(temp).FirstOrCreate(&temp)
}

func HandleHeartBeat(deviceName, uuid string) {
	now := time.Now()
	updateGatewayData := map[string]interface{}{
		"online":      1,
		"online_time": now,
	}
	// 网关deviceName匹配，更新网关在线时间
	err := global.GVA_DB.Model(&dao.Gateway{}).Where("device_name = ?", deviceName).
		Updates(updateGatewayData).Error
	if err != nil {
		// 网关不存在/更新失败仅打日志，不阻断灯具更新逻辑
		global.GVA_LOG.Error("心跳：", zap.Any("err", err))
		return
	}
	// 以UUID为唯一主键匹配灯具
	updateData := map[string]interface{}{
		"online":      1,
		"online_time": now,
	}
	// 仅更新，不存在则不操作
	global.GVA_DB.Model(&dao.Bluetooth{}).
		Where("uuid = ?", uuid).
		Updates(updateData)
}

func (bs *BluetoothService) QueryAllTempScanDevices() ([]dao.TempScanDevice, error) {
	return dao.QueryAllTempScanDevices()
}

func (bs *BluetoothService) DeviceSendCmd(info request.DeviceSendCmdData) error {
	gateway, err := dao.QueryGatewayByDeviceName(info.DeviceName)
	if err != nil {
		return err
	}
	return DeviceSendCmd(gateway.ProductKey, gateway.DeviceName, gateway.NetPwd, "00 00", "00 00", info.Action, info.Params)
}

func (bs *BluetoothService) GetDeviceData(info request.GetDeviceOrderData) error {
	gateway, err := dao.QueryGatewayByDeviceName(info.DeviceName)
	if err != nil {
		return err
	}
	return GetSetting(gateway.ProductKey, gateway.DeviceName, gateway.NetPwd, "00 00", "00 00")
}

func GetDeviceConsumption() error {
	gateways, err := dao.QueryAllGateways()
	if err != nil {
		return err
	}
	for _, gateway := range gateways {
		go DeviceSendCmd(gateway.ProductKey, gateway.DeviceName, gateway.NetPwd, "00 00", "00 00", "getConsumption", "")
	}
	return nil
}

func (bs *BluetoothService) ScanAllDevice(info request.GetDeviceOrderData) error {
	gateway, err := dao.QueryGatewayByDeviceName(info.DeviceName)
	if err != nil {
		return err
	}
	return ScanAll(gateway.ProductKey, gateway.DeviceName, gateway.NetPwd, "00 00")
}

func (bs *BluetoothService) CreateBluetooth(info request.CreateBluetoothData) error {
	// 1、插入正式灯具表
	blu := dao.Bluetooth{
		GatewayID:  uint(info.GatewayId),
		UUID:       info.Device.UUID,
		AreaNo:     info.Device.AreaNo,
		ClusterNo:  info.Device.ClusterNo,
		Number:     info.Device.Number,
		DeviceType: info.Device.DeviceType,
		Online:     0,
	}
	err := blu.CreateBluetooth()
	if err != nil {
		return err
	}

	// 2、更新对应临时设备 IsSelected=1（已入库）
	tempModel := dao.TempScanDevice{}
	err = global.GVA_DB.Model(&tempModel).
		Where("gateway_id = ? AND uuid = ?", info.Device.GatewayID, info.Device.UUID).
		Update("is_selected", 1).Error
	return err
}

func HandleSceneData(sv model.SceneValue) {
	now := time.Now()
	// 更新字段映射
	updateMap := map[string]interface{}{
		"scene_no":         sv.SceneNo,
		"high_bright":      sv.HighBright,
		"standby_bright":   sv.StandbyBright,
		"cct_bright":       sv.CctBright,
		"delay_time":       sv.DelayTime,
		"delay_time2":      sv.DelayTime2,
		"light_mode":       sv.LightMode,
		"delay_mode":       sv.DelayMode,
		"als_control_mode": sv.AlsControlMode,
		"scene_validity":   sv.SceneValidity,
		"online":           1,
		"online_time":      now,
	}

	// 根据唯一UUID更新灯具记录
	err := global.GVA_DB.Model(&dao.Bluetooth{}).
		Where("uuid = ?", sv.UUID).
		Updates(updateMap).Error
	if err != nil {
		global.GVA_LOG.Error("处理情景参数上报失败",
			zap.String("uuid", sv.UUID),
			zap.Error(err))
		return
	}

	// 顺带刷新网关在线时间（DeviceName为网关SN）
	err = global.GVA_DB.Model(&dao.Gateway{}).
		Where("device_name = ?", sv.DeviceName).
		Updates(map[string]interface{}{
			"online_time": now,
			"online":      1,
		}).Error
	if err != nil {
		global.GVA_LOG.Error("情景上报刷新网关在线失败",
			zap.String("gatewaySn", sv.DeviceName),
			zap.Error(err))
	}
}

func (bs *BluetoothService) QueryBluetoothsByGatewayID(gatewayId int) ([]dao.Bluetooth, error) {
	return dao.QueryBluetoothsByGatewayID(gatewayId)
}

func CreateDeviceConsumption(val model.ConsumptionValue) error {
	// 1. 获取网关信息
	gateway, err := dao.QueryGatewayByDeviceName(val.DeviceName)
	if err != nil {
		return err
	}

	// 2. 查询该灯具（UUID）上一次上报的记录
	var lastRecord dao.DeviceConsumption
	// 根据 UUID 倒序查询最新的一条
	err = global.GVA_DB.Where("uuid = ?", val.UUID).
		Order("acquisition_ts DESC").
		First(&lastRecord).Error

	// 3. 初始化本次存储的“增量”数据（默认等于硬件上报值，以防第一次上报）
	deltaTimeDur := val.TimeDur
	deltaEnergyDur := val.EnergyDur

	// 4. 如果历史记录存在，计算出差值
	if err == nil { // 说明查到了上次记录
		// 防御性编程：防止硬件重启导致 TimeDur 数值变小变成负数
		if val.TimeDur > lastRecord.TimeDur {
			deltaTimeDur = val.TimeDur - lastRecord.TimeDur
		}
		if val.EnergyDur > lastRecord.EnergyDur {
			deltaEnergyDur = val.EnergyDur - lastRecord.EnergyDur
		}
	}

	// 5. 根据差值，重新计算本次的实际和理论能耗 (度)
	deltaActualKwh := float64(deltaEnergyDur) * val.Power / 3600 / 1000
	deltaTheoryKwh := float64(deltaTimeDur) * val.Power / 3600 / 1000

	// 6. 构建要落库的结构体，此时存入的都是 【差值】
	dc := dao.DeviceConsumption{
		GatewayID:     gateway.ID,
		UUID:          val.UUID,
		AreaNo:        val.Area,
		Number:        val.Number,
		DeviceName:    val.DeviceName,
		AcquisitionTs: val.AcquisitionTime,
		TimeDur:       deltaTimeDur,   // 【关键修改】存差值，而不是源值
		SensorDur:     val.SensorDur,  // 如果 sensor_dur 也是总累积，也需要按此逻辑做减法
		EnergyDur:     deltaEnergyDur, // 【关键修改】存差值
		Power:         val.Power,
		ActualKwh:     deltaActualKwh, // 【关键修改】存差值对应的实际耗电
		TheoryKwh:     deltaTheoryKwh, // 【关键修改】存差值对应的理论耗电
	}

	// 7. 调用你原有的 dao 方法，直接落库
	return dc.CreateDeviceConsumption()
}

// SummaryWeekConsumption 按网关维度聚合每周总能耗
func SummaryWeekConsumption() error {
	db := global.GVA_DB.Begin()
	defer func() {
		if err := recover(); err != nil {
			global.GVA_LOG.Error("能耗汇总panic", zap.Any("err", err))
			db.Rollback()
		}
	}()

	now := time.Now()
	curYear, curWeek := now.ISOWeek()

	// ========== 第一步：先统计【每一盏灯具】每周能耗 ==========
	// 先删除本周已存在的灯具维度汇总数据，避免重复累加
	err := db.Where("year = ? AND week = ? AND uuid <> ''", curYear, curWeek).
		Delete(&dao.WeekConsumptionSummary{}).Error
	if err != nil {
		db.Rollback()
		global.GVA_LOG.Error("删除本周灯具历史汇总失败", zap.Error(err))
		return err
	}

	type LampSummary struct {
		GatewayID   uint
		UUID        string
		Year        int
		Week        int
		ActualTotal float64
		TheoryTotal float64
	}
	var lampSummaryList []LampSummary

	// 按网关、灯具UUID、年、周分组求和
	err = db.Model(&dao.DeviceConsumption{}).
		Select(`gateway_id, uuid,
			YEAR(FROM_UNIXTIME(acquisition_ts)) AS year,
			WEEK(FROM_UNIXTIME(acquisition_ts), 1) AS week,
			SUM(actual_kwh) AS actual_total,
			SUM(theory_kwh) AS theory_total`).
		Group("gateway_id, uuid, year, week").
		Scan(&lampSummaryList).Error
	if err != nil {
		db.Rollback()
		global.GVA_LOG.Error("灯具周能耗聚合失败", zap.Error(err))
		return err
	}

	// 批量插入灯具维度周汇总
	var lampInsertList []dao.WeekConsumptionSummary
	for _, item := range lampSummaryList {
		lampInsertList = append(lampInsertList, dao.WeekConsumptionSummary{
			GatewayID:   item.GatewayID,
			UUID:        item.UUID,
			Year:        item.Year,
			Week:        item.Week,
			ActualTotal: item.ActualTotal,
			TheoryTotal: item.TheoryTotal,
		})
	}
	if len(lampInsertList) > 0 {
		if err = db.CreateInBatches(lampInsertList, 500).Error; err != nil {
			db.Rollback()
			return err
		}
	}

	// ========== 第二步：统计【单个网关下所有灯具】每周总能耗（前端图表用） ==========
	// UUID为空代表网关全局汇总
	err = db.Where("year = ? AND week = ? AND uuid = ''", curYear, curWeek).
		Delete(&dao.WeekConsumptionSummary{}).Error
	if err != nil {
		db.Rollback()
		return err
	}

	type GatewaySummary struct {
		GatewayID   uint
		Year        int
		Week        int
		ActualTotal float64
		TheoryTotal float64
	}
	var gatewaySummaryList []GatewaySummary

	// 只按网关、年、周分组，自动累加该网关下所有灯具能耗
	err = db.Model(&dao.DeviceConsumption{}).
		Select(`gateway_id,
			YEAR(FROM_UNIXTIME(acquisition_ts)) AS year,
			WEEK(FROM_UNIXTIME(acquisition_ts), 1) AS week,
			SUM(actual_kwh) AS actual_total,
			SUM(theory_kwh) AS theory_total`).
		Group("gateway_id, year, week").
		Scan(&gatewaySummaryList).Error
	if err != nil {
		db.Rollback()
		return err
	}

	// 网关总汇总：UUID赋值为空字符串
	var gatewayInsertList []dao.WeekConsumptionSummary
	for _, item := range gatewaySummaryList {
		gatewayInsertList = append(gatewayInsertList, dao.WeekConsumptionSummary{
			GatewayID:   item.GatewayID,
			UUID:        "", // 空标识网关全局汇总
			Year:        item.Year,
			Week:        item.Week,
			ActualTotal: item.ActualTotal,
			TheoryTotal: item.TheoryTotal,
		})
	}
	if len(gatewayInsertList) > 0 {
		if err = db.CreateInBatches(gatewayInsertList, 500).Error; err != nil {
			db.Rollback()
			return err
		}
	}

	db.Commit()
	global.GVA_LOG.Info("本周网关&灯具能耗汇总统计完成")
	return nil
}

// QueryDataDashboardParameter 获取数据大屏综合参数
func (bs *BluetoothService) QueryDataDashboardParameter(req model.DashboardRequest) model.DashboardResponse {
	db := global.GVA_DB

	// 1. 获取所有网关列表 (下拉框数据)
	var gateways []dao.Gateway
	if err := db.Find(&gateways).Error; err != nil {
		global.GVA_LOG.Error("获取网关列表失败", zap.Error(err))
	}

	// 2. 获取可供选择的历史周列表 (下拉框数据)
	// 注意：如果选了网关，只展示该网关下的历史周
	var rawWeeks []struct {
		Year int
		Week int
	}
	weekQuery := db.Model(&dao.WeekConsumptionSummary{}).Select("DISTINCT year, week").Where("uuid = ''")
	if req.GatewayID != 0 {
		weekQuery = weekQuery.Where("gateway_id = ?", req.GatewayID)
	}
	weekQuery.Order("year DESC, week DESC").Scan(&rawWeeks)

	var availableWeeks []model.AvailableWeek
	for _, r := range rawWeeks {
		availableWeeks = append(availableWeeks, model.AvailableWeek{
			Year:  r.Year,
			Week:  r.Week,
			Label: fmt.Sprintf("%d 第 %d 周", r.Year, r.Week),
		})
	}

	// 3. 默认时间处理：若前端没传年份/周数，则使用表中最新的周
	if req.Year == 0 || req.Week == 0 {
		if len(rawWeeks) > 0 {
			req.Year, req.Week = rawWeeks[0].Year, rawWeeks[0].Week
		} else {
			// 如果没有任何记录，则使用当前系统周（兜底）
			now := time.Now()
			req.Year, req.Week = now.ISOWeek()
		}
	}

	// ================= 核心数据聚合 =================

	// 4. 获取指定网关、指定周的汇总能耗数据 (实际耗电、理论耗电)
	var actualEnergy, theoryEnergy float64
	var weekSummary dao.WeekConsumptionSummary
	querySummary := db.Where("uuid = ''")
	if req.GatewayID != 0 {
		querySummary = querySummary.Where("gateway_id = ?", req.GatewayID)
	}
	err := querySummary.Where("year = ? AND week = ?", req.Year, req.Week).
		First(&weekSummary).Error
	if err == nil {
		actualEnergy = weekSummary.ActualTotal
		theoryEnergy = weekSummary.TheoryTotal
	} else if !errors.Is(err, gorm.ErrRecordNotFound) {
		global.GVA_LOG.Error("查询周汇总能耗失败", zap.Error(err))
	}

	// 5. 计算碳排放和占比
	carbonReduction := math.Max(0, theoryEnergy-actualEnergy)
	carbonReductionRatio := 0.0
	if theoryEnergy > 0 {
		carbonReductionRatio = (carbonReduction / theoryEnergy) * 100
	}

	// ================= 统计灯具与预警数 =================
	var totalLuminaires int64
	lampsQuery := db.Model(&dao.Bluetooth{})
	if req.GatewayID != 0 {
		lampsQuery = lampsQuery.Where("gateway_id = ?", req.GatewayID)
	}
	lampsQuery.Count(&totalLuminaires)

	var warningCount int64
	alarmQuery := db.Model(&dao.Bluetooth{}).Where("online = 0")
	if req.GatewayID != 0 {
		alarmQuery = alarmQuery.Where("gateway_id = ?", req.GatewayID)
	}
	alarmQuery.Count(&warningCount)

	// ================= 获取回路设备(智能控制)列表 =================
	var devices []dao.Device

	if err := db.Group("device.id").Find(&devices).Error; err != nil {
		global.GVA_LOG.Error("查询回路设备失败", zap.Error(err))
	}
	loopDeviceCount := len(devices)

	// ================= 趋势图数据计算 =================
	var trends []model.TrendData
	var yearOnYearTrends []model.TrendData

	// 只有当传了确切的周数才处理趋势图，否则无法计算时间范围
	if req.Year != 0 && req.Week != 0 {
		// 6. 获取本周每日能耗趋势
		startTs, endTs := getWeekRange(req.Year, req.Week) // 修正后的ISO周计算

		var dailyData []dailyTrendDB
		trendQuery := db.Model(&dao.DeviceConsumption{})
		if req.GatewayID != 0 {
			trendQuery = trendQuery.Where("gateway_id = ?", req.GatewayID)
		}
		err = trendQuery.
			Select("DATE_FORMAT(CONVERT_TZ(FROM_UNIXTIME(acquisition_ts), '+00:00', '+08:00'), '%Y-%m-%d') as date_str, "+
				"SUM(actual_kwh) as actual_total, SUM(theory_kwh) as theory_total").
			Where("acquisition_ts >= ? AND acquisition_ts <= ?", startTs, endTs).
			Group("date_str").
			Order("date_str ASC").
			Scan(&dailyData).Error
		if err != nil {
			global.GVA_LOG.Error("获取本周每日趋势失败", zap.Error(err))
		}

		// 序列化为 7天的标准 TrendData (补齐缺失的日期为0)
		trendMap := make(map[string]model.TrendData)
		for _, d := range dailyData {
			trendMap[d.DateStr] = model.TrendData{Date: d.DateStr, Actual: d.Actual, Theory: d.Theory}
		}
		for i := 0; i < 7; i++ {
			dayUnix := startTs + int64(i*24*3600)
			dayStr := time.Unix(dayUnix, 0).Format("2006-01-02")
			if val, ok := trendMap[dayStr]; ok {
				trends = append(trends, val)
			} else {
				trends = append(trends, model.TrendData{Date: dayStr, Actual: 0, Theory: 0})
			}
		}

		// 7. 获取去年同周同比数据 (按星期几分组)
		lastYear, lastWeek := getPrevYearWeek(req.Year, req.Week)
		lastStartTs, lastEndTs := getWeekRange(lastYear, lastWeek)

		var lastYearData []weeklyTrendDB
		yearTrendQuery := db.Model(&dao.DeviceConsumption{})
		if req.GatewayID != 0 {
			yearTrendQuery = yearTrendQuery.Where("gateway_id = ?", req.GatewayID)
		}
		err = yearTrendQuery.
			Select("WEEKDAY(CONVERT_TZ(FROM_UNIXTIME(acquisition_ts), '+00:00', '+08:00')) as weekday, "+
				"SUM(actual_kwh) as actual_total, SUM(theory_kwh) as theory_total").
			Where("acquisition_ts >= ? AND acquisition_ts <= ?", lastStartTs, lastEndTs).
			Group("weekday").
			Order("weekday ASC").
			Scan(&lastYearData).Error
		if err != nil {
			global.GVA_LOG.Error("获取去年同比趋势失败", zap.Error(err))
		}

		// 星期名称映射
		weekNameMap := map[int]string{0: "星期一", 1: "星期二", 2: "星期三", 3: "星期四", 4: "星期五", 5: "星期六", 6: "星期日"}
		yearOnYearTrends = make([]model.TrendData, 7)
		for i := 0; i < 7; i++ {
			yearOnYearTrends[i] = model.TrendData{Date: weekNameMap[i], Actual: 0, Theory: 0}
		}
		for _, d := range lastYearData {
			if d.Weekday >= 0 && d.Weekday <= 6 {
				yearOnYearTrends[d.Weekday] = model.TrendData{
					Date:   weekNameMap[d.Weekday],
					Actual: d.Actual,
					Theory: d.Theory,
				}
			}
		}
	}

	// ================= 组装返回结构 =================
	return model.DashboardResponse{
		Gateways:               gateways,
		AvailableWeeks:         availableWeeks,
		CurrentGatewayID:       req.GatewayID,
		TotalLuminaires:        int(totalLuminaires),
		ElectricityConsumption: actualEnergy,
		CarbonReduction:        carbonReduction,
		CarbonReductionRatio:   carbonReductionRatio,
		WarningCount:           int(warningCount),
		LoopDeviceCount:        loopDeviceCount,
		Devices:                devices,
		GatewayCount:           len(gateways),
		Trends:                 trends,
		YearOnYearTrends:       yearOnYearTrends,
	}
}

// ================= 内部辅助函数 (ISO周严格计算，修正了偏移问题) =================

// getWeekRange 根据年、周数计算该周周一 00:00:00 和周日 23:59:59
func getWeekRange(year, week int) (startTs, endTs int64) {
	// ISO 8601标准：第一周包含第一个星期四
	jan1 := time.Date(year, time.January, 1, 0, 0, 0, 0, time.Local)
	offsetToThursday := int(time.Thursday - jan1.Weekday())
	if offsetToThursday < 0 {
		offsetToThursday += 7
	}
	firstThursday := jan1.AddDate(0, 0, offsetToThursday)
	// 第一个星期一 = 第一个星期四 - 3天
	firstMonday := firstThursday.AddDate(0, 0, -3)
	// 目标周的周一
	targetMonday := firstMonday.AddDate(0, 0, (week-1)*7)

	start := time.Date(targetMonday.Year(), targetMonday.Month(), targetMonday.Day(), 0, 0, 0, 0, time.Local)
	end := start.AddDate(0, 0, 7).Add(-time.Second)

	return start.Unix(), end.Unix()
}

// getPrevYearWeek 获取去年的同一周
func getPrevYearWeek(curYear, curWeek int) (prevYear, prevWeek int) {
	// 基于相同算法稳健减去365天
	jan1 := time.Date(curYear, time.January, 1, 0, 0, 0, 0, time.Local)
	offsetToThursday := int(time.Thursday - jan1.Weekday())
	if offsetToThursday < 0 {
		offsetToThursday += 7
	}
	firstThursday := jan1.AddDate(0, 0, offsetToThursday)
	firstMonday := firstThursday.AddDate(0, 0, -3)
	targetMonday := firstMonday.AddDate(0, 0, (curWeek-1)*7)
	lastYearMonday := targetMonday.AddDate(0, 0, -364)
	return lastYearMonday.ISOWeek()
}

// 结构体本地引用 (若全局有定义可移除)
type dailyTrendDB struct {
	DateStr string  `gorm:"column:date_str"`
	Actual  float64 `gorm:"column:actual_total"`
	Theory  float64 `gorm:"column:theory_total"`
}
type weeklyTrendDB struct {
	Weekday int     `gorm:"column:weekday"`
	Actual  float64 `gorm:"column:actual_total"`
	Theory  float64 `gorm:"column:theory_total"`
}

// 定时删除 2 年前的记录
func CleanupOldDeviceConsumption() {
	// 计算 2 年的时间戳
	twoYearsAgo := time.Now().AddDate(-2, 0, 0).Unix()

	// 循环分批删除，直到没有数据可删
	for {
		result := global.GVA_DB.Where("acquisition_ts < ?", twoYearsAgo).
			Limit(5000).
			Delete(&dao.DeviceConsumption{})

		if result.Error != nil {
			global.GVA_LOG.Error("清理历史明细失败", zap.Error(result.Error))
			break // 遇到错误终止循环
		}

		// 如果这一批删了 0 条，说明历史数据已经全部清完，退出循环
		if result.RowsAffected == 0 {
			global.GVA_LOG.Info("历史数据清理完毕")
			break
		}

		// 稍微停顿 200 毫秒，给主库一点喘息的时间，避免 DELETE 压力过大导致主从同步延迟
		time.Sleep(200 * time.Millisecond)
	}
}

func (bs *BluetoothService) QueryBluetoothList(info request.SearchBluetoothList) ([]dao.Bluetooth, int64, error) {
	limit := info.PageSize
	offset := info.PageSize * (info.Page - 1)

	return dao.QueryBluetoothList(info.GatewayId, limit, offset)
}