package models

import (
	"errors"
	"eta/eta_index_lib/utils"
	"fmt"
	"github.com/beego/beego/v2/client/orm"
	"github.com/shopspring/decimal"
	"reflect"
	"strconv"
	"strings"
	"time"
)

// PredictLjz 预测累计值
type PredictLjz struct {
}

// Add 添加
func (obj PredictLjz) Add(params BatchSaveCalculateBatchParams) (edbInfo *EdbInfo, latestDateStr string, latestValue float64, err error, errMsg string) {
	req := params.Req
	fromEdbInfo := params.FromEdbInfo
	edbCode := params.EdbCode

	frequencyInt := utils.CheckFrequency(fromEdbInfo.Frequency, req.Frequency)
	if frequencyInt < 0 {
		errMsg = "频度异常，不允许低频转为高频"
		err = errors.New(errMsg)
		return
	}
	if frequencyInt == 0 {
		errMsg = "频度异常，不允许同频计算预测累计值"
		err = errors.New(errMsg)
		return
	}
	o := orm.NewOrm()
	to, err := o.Begin()
	if err != nil {
		return
	}
	defer func() {
		if err != nil {
			_ = to.Rollback()
			fmt.Println(reflect.TypeOf(obj).Name(), "；Add,Err:"+err.Error())
		} else {
			_ = to.Commit()
		}
	}()

	edbInfo = &EdbInfo{
		//EdbInfoId:        0,
		SourceName:       obj.GetSourceName(),
		Source:           obj.GetSource(),
		EdbCode:          edbCode,
		EdbName:          req.EdbName,
		EdbNameSource:    req.EdbName,
		Frequency:        req.Frequency,
		Unit:             req.Unit,
		StartDate:        "",
		EndDate:          "",
		ClassifyId:       req.ClassifyId,
		SysUserId:        params.SysUserId,
		SysUserRealName:  params.SysUserRealName,
		UniqueCode:       params.UniqueCode,
		CreateTime:       time.Now(),
		ModifyTime:       time.Now(),
		MinValue:         0,
		MaxValue:         0,
		CalculateFormula: req.Formula,
		EdbType:          2,
		Sort:             GetAddEdbMaxSortByClassifyId(req.ClassifyId, utils.PREDICT_EDB_INFO_TYPE),
		MoveType:         0,
		MoveFrequency:    "",
		NoUpdate:         0,
		ServerUrl:        "",
		EdbInfoType:      1,
		EdbNameEn:        req.EdbName,
		UnitEn:           req.Unit,
		LatestDate:       "",
		LatestValue:      0,
		ChartImage:       "",
		Calendar:         "",
	}

	newEdbInfoId, tmpErr := to.Insert(edbInfo)
	if tmpErr != nil {
		err = tmpErr
		return
	}
	edbInfo.EdbInfoId = int(newEdbInfoId)

	//关联关系
	{
		calculateMappingItem := new(EdbInfoCalculateMapping)
		calculateMappingItem.CreateTime = time.Now()
		calculateMappingItem.ModifyTime = time.Now()
		calculateMappingItem.Sort = 1
		calculateMappingItem.EdbCode = edbCode
		calculateMappingItem.EdbInfoId = edbInfo.EdbInfoId
		calculateMappingItem.FromEdbInfoId = fromEdbInfo.EdbInfoId
		calculateMappingItem.FromEdbCode = fromEdbInfo.EdbCode
		calculateMappingItem.FromEdbName = fromEdbInfo.EdbName
		calculateMappingItem.FromSource = fromEdbInfo.Source
		calculateMappingItem.FromSourceName = fromEdbInfo.SourceName
		calculateMappingItem.FromTag = ""
		calculateMappingItem.Source = edbInfo.Source
		calculateMappingItem.SourceName = edbInfo.SourceName
		_, err = to.Insert(calculateMappingItem)
		if err != nil {
			return
		}
	}

	//计算数据
	latestDateStr, latestValue, err = obj.refresh(to, edbInfo.EdbInfoId, edbInfo.Source, edbInfo.SubSource, edbInfo, fromEdbInfo, edbInfo.EdbCode, "")

	return
}

// Edit 编辑
func (obj PredictLjz) Edit(params BatchSaveCalculateBatchParams) (latestDateStr string, latestValue float64, err error, errMsg string) {
	req := params.Req
	edbInfo := params.EdbInfo
	fromEdbInfo := params.FromEdbInfo
	latestDateStr = edbInfo.LatestDate
	latestValue = edbInfo.LatestValue

	frequencyInt := utils.CheckFrequency(fromEdbInfo.Frequency, req.Frequency)
	if frequencyInt < 0 {
		errMsg = "频度异常，不允许低频转为高频"
		err = errors.New(errMsg)
		return
	}
	if frequencyInt == 0 {
		errMsg = "频度异常，不允许同频计算预测累计值"
		err = errors.New(errMsg)
		return
	}
	latestDateStr = edbInfo.LatestDate
	latestValue = edbInfo.LatestValue

	o := orm.NewOrm()
	to, err := o.Begin()
	if err != nil {
		return
	}
	defer func() {
		if err != nil {
			_ = to.Rollback()
			fmt.Println(reflect.TypeOf(obj).Name(), "；Edit,Err:"+err.Error())
		} else {
			_ = to.Commit()
		}
	}()
	tableName := GetEdbDataTableName(edbInfo.Source, edbInfo.SubSource)

	var isRecalculate bool
	if edbInfo.Frequency != req.Frequency {
		isRecalculate = true
	}
	//修改指标信息
	switch params.Lang {
	case utils.EnLangVersion:
		edbInfo.EdbNameEn = req.EdbName
		edbInfo.UnitEn = req.Unit
	default:
		edbInfo.EdbName = req.EdbName
		edbInfo.Unit = req.Unit
		edbInfo.EdbNameSource = req.EdbName
	}
	edbInfo.Frequency = req.Frequency
	edbInfo.ClassifyId = req.ClassifyId
	edbInfo.ModifyTime = time.Now()
	_, err = to.Update(edbInfo, "EdbName", "EdbNameSource", "Frequency", "Unit", "ClassifyId", "ModifyTime", "EdbNameEn", "UnitEn")
	if err != nil {
		return
	}

	var existCondition string
	var existPars []interface{}
	existCondition += " AND edb_info_id=? AND from_edb_info_id=? "
	existPars = append(existPars, edbInfo.EdbInfoId, req.FromEdbInfoId)

	//判断计算指标是否被更换
	count, err := GetEdbInfoCalculateCountByCondition(existCondition, existPars)
	if err != nil {
		err = errors.New("判断指标是否改变失败,Err:" + err.Error())
		return
	}
	if count > 0 { // 指标未被替换，无需删除关联数据

		// 频度被换了，需要重新计算
		if isRecalculate {
			latestDateStr, latestValue, err = obj.refresh(to, edbInfo.EdbInfoId, edbInfo.Source, edbInfo.SubSource, edbInfo, fromEdbInfo, edbInfo.EdbCode, "")
		}

		return
	}

	//删除，计算指标关联的，基础指标的关联关系
	sql := ` DELETE FROM edb_info_calculate_mapping WHERE edb_info_id = ? `
	_, err = to.Raw(sql, edbInfo.EdbInfoId).Exec()
	if err != nil {
		return
	}

	//清空原有数据
	sql = ` DELETE FROM ` + tableName + ` WHERE edb_info_id = ? `
	_, err = to.Raw(sql, edbInfo.EdbInfoId).Exec()
	if err != nil {
		return
	}

	//关联关系
	{
		calculateMappingItem := &EdbInfoCalculateMapping{
			EdbInfoCalculateMappingId: 0,
			EdbInfoId:                 edbInfo.EdbInfoId,
			Source:                    obj.GetSource(),
			SourceName:                obj.GetSourceName(),
			EdbCode:                   edbInfo.EdbCode,
			FromEdbInfoId:             fromEdbInfo.EdbInfoId,
			FromEdbCode:               fromEdbInfo.EdbCode,
			FromEdbName:               fromEdbInfo.EdbName,
			FromSource:                fromEdbInfo.Source,
			FromSourceName:            fromEdbInfo.SourceName,
			FromTag:                   "",
			Sort:                      1,
			CreateTime:                time.Now(),
			ModifyTime:                time.Now(),
		}
		_, err = to.Insert(calculateMappingItem)
		if err != nil {
			return
		}
	}

	//计算数据
	latestDateStr, latestValue, err = obj.refresh(to, edbInfo.EdbInfoId, edbInfo.Source, edbInfo.SubSource, edbInfo, fromEdbInfo, edbInfo.EdbCode, "")

	return
}

// Refresh 刷新
func (obj PredictLjz) Refresh(params RefreshParams) (latestDateStr string, latestValue float64, err error, errMsg string) {
	calculateMapping, err := GetEdbInfoCalculateMappingDetail(params.EdbInfo.EdbInfoId)
	if err != nil {
		errMsg = "GetEdbInfoCalculatePredictLjzDetail Err:" + err.Error()
		return
	}
	fromEdbInfo, err := GetEdbInfoById(calculateMapping.FromEdbInfoId)
	if err != nil {
		errMsg = "GetEdbInfoById Err:" + err.Error()
		return
	}

	o := orm.NewOrm()
	to, err := o.Begin()
	if err != nil {
		return
	}
	defer func() {
		if err != nil {
			_ = to.Rollback()
			fmt.Println(reflect.TypeOf(obj).Name(), "；Refresh,Err:"+err.Error())
		} else {
			_ = to.Commit()
		}
	}()

	// 计算数据
	latestDateStr, latestValue, err = obj.refresh(to, params.EdbInfo.EdbInfoId, params.EdbInfo.Source, params.EdbInfo.SubSource, params.EdbInfo, fromEdbInfo, params.EdbInfo.EdbCode, params.StartDate)

	return
}

// GetSource 获取来源编码id
func (obj PredictLjz) GetSource() int {
	return utils.DATA_SOURCE_PREDICT_CALCULATE_LJZ
}

// GetSourceName 获取来源名称
func (obj PredictLjz) GetSourceName() string {
	return utils.DATA_SOURCE_NAME_PREDICT_CALCULATE_LJZ
}

func (obj PredictLjz) refresh(to orm.TxOrmer, edbInfoId, source, subSource int, edbInfo, fromEdbInfo *EdbInfo, edbCode, startDate string) (latestDateStr string, latestValue float64, err error) {
	dataTableName := GetEdbDataTableName(source, subSource)
	edbInfoIdStr := strconv.Itoa(edbInfoId)

	var isWeekData bool // 是否周度数据，如果是周度数据的话，是需要变频的，最后结果还需要除以7
	// 周度数据需要先变成日度的
	if fromEdbInfo.Frequency == `周度` {
		isWeekData = true
	}

	// 获取来源指标的数据
	dataList, err := GetPredictEdbDataListAll(fromEdbInfo, 1)
	if err != nil {
		return
	}

	fromEdbDataMap := make(map[string]float64)
	if isWeekData {
		dataList, err = HandleDataByLinearRegression(dataList, fromEdbDataMap)
		if err != nil {
			return
		}
	}

	//日度转周度:日期选周五，计算上周六到本周五的日度值的加总，最新日期为最新值对应的周五。
	//日度转月度:日期选每个月最后一天，计算当月所有日度值的加总，最新日期为最新值对应当月最后一天。
	//日度转季度、年度:方法类似转月度。
	//周度转月度/季度/年度:将周度值转成日度，空值用插值法插值，计算当月/当季/当年所有值的加总，然后除以7。
	//月度转季度/年度: 当季/当年月度值相加。

	dateList := make([]time.Time, 0)
	valueMap := make(map[time.Time]float64)
	switch edbInfo.Frequency {
	case "年度":
		yearMap := make(map[int]float64)
		yearList := make([]int, 0)
		for _, item := range dataList {
			itemDate, tmpErr := time.ParseInLocation(utils.FormatDate, item.DataTime, time.Local)
			if tmpErr != nil {
				err = tmpErr
				return
			}
			year := itemDate.Year()
			yearVal, ok := yearMap[year]
			if ok {
				yearMap[year] = item.Value + yearVal
			} else {
				yearList = append(yearList, year)
				yearMap[year] = item.Value
			}
		}
		for _, v := range yearList {
			currTime := time.Date(v, 12, 31, 0, 0, 0, 0, time.Local)
			dateList = append(dateList, currTime)
			valueMap[currTime] = yearMap[v]
		}
	case "半年度":
		yearMonthMap := make(map[string]float64)
		yearMonthList := make([]string, 0)
		for _, item := range dataList {
			itemDate, tmpErr := time.ParseInLocation(utils.FormatDate, item.DataTime, time.Local)
			if tmpErr != nil {
				err = tmpErr
				return
			}
			year := itemDate.Year()
			var tmpK string
			if itemDate.Month() <= 6 {
				tmpK = fmt.Sprint(year, "06")
			} else {
				tmpK = fmt.Sprint(year, "12")
			}

			yearVal, ok := yearMonthMap[tmpK]
			if ok {
				yearMonthMap[tmpK] = item.Value + yearVal
			} else {
				yearMonthList = append(yearMonthList, tmpK)
				yearMonthMap[tmpK] = item.Value
			}
		}
		for _, v := range yearMonthList {
			currTime, tmpErr := time.ParseInLocation(utils.FormatYearMonthUnSpace, v, time.Local)
			if tmpErr != nil {
				err = tmpErr
				return
			}
			currTime = currTime.AddDate(0, 1, -1)
			dateList = append(dateList, currTime)
			valueMap[currTime] = yearMonthMap[v]
		}
	case "季度":
		yearMonthMap := make(map[string]float64)
		yearMonthList := make([]string, 0)
		for _, item := range dataList {
			itemDate, tmpErr := time.ParseInLocation(utils.FormatDate, item.DataTime, time.Local)
			if tmpErr != nil {
				err = tmpErr
				return
			}
			year := itemDate.Year()
			var tmpK string
			if itemDate.Month() <= 3 {
				tmpK = fmt.Sprint(year, "03")
			} else if itemDate.Month() <= 6 {
				tmpK = fmt.Sprint(year, "06")
			} else if itemDate.Month() <= 9 {
				tmpK = fmt.Sprint(year, "09")
			} else {
				tmpK = fmt.Sprint(year, "12")
			}

			yearVal, ok := yearMonthMap[tmpK]
			if ok {
				yearMonthMap[tmpK] = item.Value + yearVal
			} else {
				yearMonthList = append(yearMonthList, tmpK)
				yearMonthMap[tmpK] = item.Value
			}
		}
		for _, v := range yearMonthList {
			currTime, tmpErr := time.ParseInLocation(utils.FormatYearMonthUnSpace, v, time.Local)
			if tmpErr != nil {
				err = tmpErr
				return
			}
			currTime = currTime.AddDate(0, 1, -1)
			dateList = append(dateList, currTime)
			valueMap[currTime] = yearMonthMap[v]
		}
	case "月度":
		yearMonthMap := make(map[string]float64)
		yearMonthList := make([]string, 0)
		for _, item := range dataList {
			itemDate, tmpErr := time.ParseInLocation(utils.FormatDate, item.DataTime, time.Local)
			if tmpErr != nil {
				err = tmpErr
				return
			}
			year := itemDate.Year()
			var tmpK string
			tmpK = fmt.Sprint(year*100 + int(itemDate.Month()))

			yearVal, ok := yearMonthMap[tmpK]
			if ok {
				yearMonthMap[tmpK] = item.Value + yearVal
			} else {
				yearMonthList = append(yearMonthList, tmpK)
				yearMonthMap[tmpK] = item.Value
			}
		}
		for _, v := range yearMonthList {
			currTime, tmpErr := time.ParseInLocation(utils.FormatYearMonthUnSpace, v, time.Local)
			if tmpErr != nil {
				err = tmpErr
				return
			}
			currTime = currTime.AddDate(0, 1, -1)
			dateList = append(dateList, currTime)
			valueMap[currTime] = yearMonthMap[v]
		}
	case "旬度":
		tmpDateDataMap := make(map[time.Time]float64)
		tmpDateList := make([]time.Time, 0)
		for _, item := range dataList {
			itemDate, tmpErr := time.ParseInLocation(utils.FormatDate, item.DataTime, time.Local)
			if tmpErr != nil {
				err = tmpErr
				return
			}
			dayInt := itemDate.Year()*100 + int(itemDate.Month())
			var currTime time.Time
			if itemDate.Month() <= 10 {
				tmpK := fmt.Sprint(dayInt*100, "10")
				currTime, err = time.ParseInLocation(utils.FormatDateUnSpace, tmpK, time.Local)
				if err != nil {
					return
				}

			} else if itemDate.Month() <= 20 {
				tmpK := fmt.Sprint(dayInt*100, "20")
				currTime, err = time.ParseInLocation(utils.FormatDateUnSpace, tmpK, time.Local)
				if err != nil {
					return
				}
			} else {
				currTime, err = time.ParseInLocation(utils.FormatYearMonthUnSpace, fmt.Sprint(dayInt), time.Local)
				if err != nil {
					return
				}
				currTime = currTime.AddDate(0, 1, -1)
			}

			yearVal, ok := tmpDateDataMap[currTime]
			if ok {
				tmpDateDataMap[currTime] = item.Value + yearVal
			} else {
				tmpDateList = append(tmpDateList, currTime)
				tmpDateDataMap[currTime] = item.Value
			}
		}
		for _, currTime := range tmpDateList {
			dateList = append(dateList, currTime)
			valueMap[currTime] = tmpDateDataMap[currTime]
		}
	case "周度":
		tmpDateDataMap := make(map[time.Time]float64)
		tmpDateList := make([]time.Time, 0)
		for _, item := range dataList {
			itemDate, tmpErr := time.ParseInLocation(utils.FormatDate, item.DataTime, time.Local)
			if tmpErr != nil {
				err = tmpErr
				return
			}
			var currTime time.Time
			// 周六周日，这是下一个周五的数据
			if itemDate.Weekday() == 0 {
				currTime = itemDate.AddDate(0, 0, 5)
			} else if itemDate.Weekday() == 6 {
				currTime = itemDate.AddDate(0, 0, 6)
			} else {
				currTime = itemDate.AddDate(0, 0, 5-int(itemDate.Weekday()))
			}

			yearVal, ok := tmpDateDataMap[currTime]
			if ok {
				tmpDateDataMap[currTime] = item.Value + yearVal
			} else {
				tmpDateList = append(tmpDateList, currTime)
				tmpDateDataMap[currTime] = item.Value
			}
		}
		for _, currTime := range tmpDateList {
			dateList = append(dateList, currTime)
			valueMap[currTime] = tmpDateDataMap[currTime]
		}

	}

	//获取指标所有数据
	existDataList := make([]*EdbData, 0)
	sql := `SELECT * FROM %s WHERE edb_info_id=? `
	sql = fmt.Sprintf(sql, dataTableName)
	_, err = to.Raw(sql, edbInfoId).QueryRows(&existDataList)
	if err != nil {
		return
	}
	existDataMap := make(map[string]string)
	removeDataTimeMap := make(map[string]int) //需要移除的日期数据
	for _, v := range existDataList {
		existDataMap[v.DataTime] = v.Value
		removeDataTimeMap[v.DataTime] = 1
	}
	needAddDateMap := make(map[time.Time]int)

	addSql := ` INSERT INTO ` + dataTableName + `(edb_info_id,edb_code,data_time,value,create_time,modify_time,data_timestamp) values `
	var isAdd bool
	for _, currTime := range dateList {
		currDateStr := currTime.Format(utils.FormatDate)
		existVal, ok := existDataMap[currDateStr]

		tmpVal, ok2 := valueMap[currTime]
		if !ok2 {
			err = errors.New("数据异常,date:" + currDateStr)
			return
		}
		var saveValue string
		if isWeekData { //周度指标转的话，最后结果要除以7
			saveValue = decimal.NewFromFloat(tmpVal).Div(decimal.NewFromInt(7)).Round(4).String()
		} else {
			saveValue = decimal.NewFromFloat(tmpVal).Round(4).String()
		}

		// 如果库中已经存在该数据的话，那么就进行值的变更操作
		if ok {
			//校验待删除日期数据里面是否存在该元素，如果存在的话，那么移除该日期
			delete(removeDataTimeMap, currDateStr)

			if existVal != saveValue {
				sql := ` UPDATE %s SET value=?,modify_time=NOW() WHERE edb_info_id=? AND data_time=? `
				sql = fmt.Sprintf(sql, dataTableName)
				_, err = to.Raw(sql, saveValue, edbInfoId, currDateStr).Exec()
				if err != nil {
					return
				}
			}

			continue
		}

		// 库中不存在该日期的数据
		timestamp := currTime.UnixNano() / 1e6
		timeStr := fmt.Sprintf("%d", timestamp)
		if _, existOk := needAddDateMap[currTime]; !existOk {
			addSql += GetAddSql(edbInfoIdStr, edbCode, currDateStr, timeStr, saveValue)
			isAdd = true
		}
		needAddDateMap[currTime] = 1
	}

	//删除已经不存在的指标数据（由于该指标当日的数据删除了）
	{
		removeDateList := make([]string, 0)
		for dateTime := range removeDataTimeMap {
			removeDateList = append(removeDateList, dateTime)
		}
		removeNum := len(removeDateList)
		if removeNum > 0 {
			sql := fmt.Sprintf(` DELETE FROM %s WHERE edb_info_id = ? and data_time in (`+utils.GetOrmInReplace(removeNum)+`) `, dataTableName)
			_, err = to.Raw(sql, edbInfo.EdbInfoId, removeDateList).Exec()
			if err != nil {
				fmt.Println(reflect.TypeOf(obj).Name(), " add data ;delete Err", err.Error())
				err = fmt.Errorf("删除不存在的指标数据失败,Err:" + err.Error())
				return
			}
		}
	}

	if isAdd {
		addSql = strings.TrimRight(addSql, ",")
		_, err = to.Raw(addSql).Exec()
		if err != nil {
			fmt.Println(reflect.TypeOf(obj).Name(), " add data Err", err.Error())
			return
		}
	}
	// 确定实际数据的最终值
	{
		var finalLast EdbInfoSearchData
		sql = fmt.Sprintf(` SELECT data_time , value FROM %s WHERE edb_info_id=? and data_time<=? ORDER BY data_time DESC `, dataTableName)
		err = to.Raw(sql, edbInfoId, fromEdbInfo.LatestDate).QueryRow(&finalLast)
		if err != nil && err.Error() != utils.ErrNoRow() {
			return
		} else {
			latestDateStr = finalLast.DataTime
			latestValue = finalLast.Value
		}
		if err != nil {
			err = nil
		} else {
			latestDateStr = finalLast.DataTime
			latestValue = finalLast.Value
		}
	}

	return
}