package models

import (
	"errors"
	"eta/eta_index_lib/global"
	"eta/eta_index_lib/utils"
	"fmt"
	"github.com/shopspring/decimal"
	"gorm.io/gorm"
	"strconv"
	"strings"
	"time"
)

// AddCalculateRjz 日均值
func AddCalculateRjz(req *EdbInfoCalculateBatchSaveReq, fromEdbInfo *EdbInfo, edbCode, uniqueCode string, sysUserId int, sysUserRealName string) (edbInfo *EdbInfo, err error) {
	to := global.DEFAULT_DB.Begin()
	defer func() {
		if err != nil {
			to.Rollback()
		} else {
			to.Commit()
		}
	}()
	if req.EdbInfoId <= 0 {
		edbInfo = new(EdbInfo)
		edbInfo.Source = utils.DATA_SOURCE_CALCULATE_RJZ
		edbInfo.SourceName = "日均值"
		edbInfo.EdbCode = edbCode
		edbInfo.EdbName = req.EdbName
		edbInfo.EdbNameSource = req.EdbName
		edbInfo.Frequency = req.Frequency
		edbInfo.Unit = req.Unit
		edbInfo.ClassifyId = req.ClassifyId
		edbInfo.SysUserId = sysUserId
		edbInfo.SysUserRealName = sysUserRealName
		edbInfo.CreateTime = time.Now()
		edbInfo.ModifyTime = time.Now()
		edbInfo.UniqueCode = uniqueCode
		edbInfo.CalculateFormula = req.Formula
		edbInfo.EdbNameEn = req.EdbName
		edbInfo.UnitEn = req.Unit
		edbInfo.EdbType = 2
		edbInfo.Sort = GetAddEdbMaxSortByClassifyId(req.ClassifyId, utils.EDB_INFO_TYPE)
		tmpErr := to.Create(edbInfo).Error
		if tmpErr != nil {
			err = tmpErr
			return
		}

		//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
			calculateMappingItem.FromSubSource = fromEdbInfo.SubSource
			err = to.Create(calculateMappingItem).Error
			if err != nil {
				return
			}
		}

	} else {
		edbInfo, err = GetEdbInfoById(req.EdbInfoId)
		if err != nil {
			return
		}
		dataTableName := GetEdbDataTableName(utils.DATA_SOURCE_CALCULATE_RJZ, utils.DATA_SUB_SOURCE_EDB)
		deleteSql := ` DELETE FROM %s WHERE edb_info_id=? `
		deleteSql = fmt.Sprintf(deleteSql, dataTableName)
		err = to.Exec(deleteSql, req.EdbInfoId).Error
		if err != nil {
			return
		}
	}

	//计算数据
	err = refreshAllCalculateRjz(to, edbInfo.EdbInfoId, edbInfo.Source, fromEdbInfo, edbCode, "", "")

	return
}

// EditCalculateRjz 日均值
func EditCalculateRjz(edbInfo *EdbInfo, req *EdbInfoCalculateBatchEditReq, fromEdbInfo *EdbInfo) (err error) {
	to := global.DEFAULT_DB.Begin()
	defer func() {
		if err != nil {
			to.Rollback()
		} else {
			to.Commit()
		}
	}()

	//修改指标信息
	edbInfo.EdbName = req.EdbName
	edbInfo.EdbNameSource = req.EdbName
	edbInfo.Frequency = req.Frequency
	edbInfo.Unit = req.Unit
	edbInfo.ClassifyId = req.ClassifyId
	edbInfo.EdbNameEn = req.EdbNameEn
	edbInfo.UnitEn = req.UnitEn
	edbInfo.ModifyTime = time.Now()
	err = to.Model(edbInfo).Select([]string{"EdbName", "EdbNameSource", "Frequency", "Unit", "ClassifyId", "ModifyTime", "EdbNameEn", "UnitEn"}).Updates(edbInfo).Error
	if err != nil {
		return
	}

	//判断计算指标是否被更换
	var existCondition string
	var existPars []interface{}
	existCondition += " AND edb_info_id=? AND from_edb_info_id=? "
	existPars = append(existPars, edbInfo.EdbInfoId, req.FromEdbInfoId)

	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，无需重新计算
		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.Exec(sql, edbInfo.EdbInfoId).Error
	if err != nil {
		return
	}
	//清空原有数据
	sql = ` DELETE FROM edb_data_calculate_rjz WHERE edb_info_id = ? `
	err = to.Exec(sql, edbInfo.EdbInfoId).Error
	if err != nil {
		return
	}
	//关联关系
	{
		calculateMappingItem := &EdbInfoCalculateMapping{
			EdbInfoCalculateMappingId: 0,
			EdbInfoId:                 edbInfo.EdbInfoId,
			Source:                    utils.DATA_SOURCE_CALCULATE_RJZ,
			SourceName:                "日均值",
			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(),
			FromSubSource:             fromEdbInfo.SubSource,
		}
		err = to.Create(calculateMappingItem).Error
		if err != nil {
			return
		}
	}

	//计算数据
	err = refreshAllCalculateRjz(to, edbInfo.EdbInfoId, edbInfo.Source, fromEdbInfo, edbInfo.EdbCode, "", "")

	return
}

// RefreshAllCalculateRjz 刷新所有日均值数据
func RefreshAllCalculateRjz(edbInfoId, source int, fromEdbInfo *EdbInfo, edbCode, startDate, endDate string) (err error) {
	to := global.DEFAULT_DB.Begin()
	defer func() {
		if err != nil {
			to.Rollback()
		} else {
			to.Commit()
		}
	}()

	//计算数据
	err = refreshAllCalculateRjz(to, edbInfoId, source, fromEdbInfo, edbCode, startDate, endDate)
	return
}

// refreshAllCalculateRjz
func refreshAllCalculateRjz(to *gorm.DB, edbInfoId, source int, fromEdbInfo *EdbInfo, edbCode, startDate, endDate string) (err error) {
	edbInfoIdStr := strconv.Itoa(edbInfoId)
	//计算数据

	dataList, err := GetEdbDataListAll(fromEdbInfo.Source, fromEdbInfo.SubSource, FindEdbDataListAllCond{
		EdbInfoId:         fromEdbInfo.EdbInfoId,
		StartDataTime:     startDate,
		StartDataTimeCond: ">=",
	}, 0)
	if err != nil {
		return err
	}
	var dateArr []string
	dataMap := make(map[string]*EdbInfoSearchData)
	for _, v := range dataList {
		dateArr = append(dateArr, v.DataTime)
		dataMap[v.DataTime] = v
	}
	fmt.Println("source:", source)
	dataTableName := GetEdbDataTableName(source, utils.DATA_SUB_SOURCE_EDB)

	//获取指标所有数据
	existDataList, err := GetAllEdbDataListByTo(to, edbInfoId, source, 0)
	if err != nil {
		return err
	}
	existDataMap := make(map[string]string)
	removeDateMap := make(map[string]bool) //需要移除的日期
	for _, v := range existDataList {
		existDataMap[v.DataTime] = v.Value
		removeDateMap[v.DataTime] = true
	}
	fmt.Println("existDataMap:", existDataMap)
	addSql := ` INSERT INTO edb_data_calculate_rjz(edb_info_id,edb_code,data_time,value,create_time,modify_time,data_timestamp) values `
	addSql = utils.ReplaceDriverKeywords("", addSql)
	var isAdd bool
	existAddDataMap := make(map[string]string)
	for _, av := range dateArr {
		currentItem := dataMap[av]
		if currentItem != nil {
			//当前日期
			currentDate, err := time.ParseInLocation(utils.FormatDate, av, time.Local)
			if err != nil {
				return err
			}
			delete(removeDateMap, av)
			//根据频度计算需要均分的天数
			days := GetRjzFrequencyDays(currentDate, fromEdbInfo.Frequency)
			val := rjzDiv(currentItem.Value, days)

			timestamp := currentDate.UnixNano() / 1e6
			timestampStr := fmt.Sprintf("%d", timestamp)
			if existVal, ok := existDataMap[av]; !ok {
				if _, existOk := existAddDataMap[av]; !existOk {
					addSql += GetAddSql(edbInfoIdStr, edbCode, av, timestampStr, val)
					isAdd = true
				}
				existAddDataMap[av] = av
			} else {
				existValDecimal, err := decimal.NewFromString(existVal)
				existStr := existValDecimal.String()
				if existStr != val {
					sql := ` UPDATE %s SET value=?,modify_time=NOW() WHERE edb_info_id=? AND data_time=? `
					sql = fmt.Sprintf(sql, dataTableName)
					err = to.Exec(sql, val, edbInfoId, av).Error
					if err != nil {
						return err
					}
				}
			}
		}
	}

	if len(removeDateMap) > 0 {
		removeDateList := make([]string, 0) //需要移除的日期
		for k := range removeDateMap {
			removeDateList = append(removeDateList, k)
		}
		removeDateStr := strings.Join(removeDateList, `','`)
		removeDateStr = `'` + removeDateStr + `'`
		//如果拼接指标变更了，那么需要删除所有的指标数据
		tableName := GetEdbDataTableName(source, utils.DATA_SUB_SOURCE_EDB)
		sql := fmt.Sprintf(` DELETE FROM %s WHERE edb_info_id = ? and data_time in (%s) `, tableName, removeDateStr)

		err = to.Exec(sql, edbInfoId).Error
		if err != nil {
			err = fmt.Errorf("删除计算失败的计算指标数据失败,Err:" + err.Error())
			return
		}
	}

	if isAdd {
		addSql = strings.TrimRight(addSql, ",")
		err = to.Exec(addSql).Error
		if err != nil {
			return err
		}
	}
	return
}
func GetRjzFrequencyDays(currDate time.Time, frequency string) (days int) {
	switch frequency {
	case "周度", "周":
		days = 7
	case "旬度":
		if currDate.Day() <= 20 { // 1旬和2旬都是10天
			days = 10
		} else {
			// 下旬,多种可能,最大天数可能存在8天,9天,10天,11天,
			currT := time.Date(currDate.Year(), currDate.Month(), 20, 0, 0, 0, 0, time.Local)
			nextT := time.Date(currDate.Year(), currDate.Month()+1, 1, 0, 0, 0, 0, time.Local).AddDate(0, 0, -1)
			days = utils.GetTimeSubDay(currT, nextT)
		}
	case "月度":
		//统计当月的天数
		currMonthFd := time.Date(currDate.Year(), currDate.Month(), 1, 0, 0, 0, 0, time.Local)
		nextMonthFd := time.Date(currDate.Year(), currDate.Month()+1, 1, 0, 0, 0, 0, time.Local)
		days = utils.GetTimeSubDay(currMonthFd, nextMonthFd)
	case "季度":
		curr0T := time.Date(currDate.Year(), 1, 1, 0, 0, 0, 0, time.Local)
		curr1T := time.Date(currDate.Year(), 3, 31, 0, 0, 0, 0, time.Local)
		curr2T := time.Date(currDate.Year(), 6, 30, 0, 0, 0, 0, time.Local)
		curr3T := time.Date(currDate.Year(), 9, 30, 0, 0, 0, 0, time.Local)
		curr4T := time.Date(currDate.Year(), 12, 31, 0, 0, 0, 0, time.Local)

		if currDate.Month() < 4 { // 1季度
			days = utils.GetTimeSubDay(curr0T, curr1T)
		} else if currDate.Month() < 7 { // 2季度
			days = utils.GetTimeSubDay(curr1T, curr2T)
		} else if currDate.Month() < 10 { // 3季度
			days = utils.GetTimeSubDay(curr2T, curr3T)
		} else {
			// 4季度
			days = utils.GetTimeSubDay(curr3T, curr4T)
		}
	case "年度":
		//统计当前年份的天数，明年1月1日-今天年1月1日
		currentYearFd := time.Date(currDate.Year(), 1, 1, 0, 0, 0, 0, time.Local)
		nextYearFd := currentYearFd.AddDate(1, 0, 0)
		days = utils.GetTimeSubDay(currentYearFd, nextYearFd)
	case "半年度":
		curr0T := time.Date(currDate.Year(), 1, 1, 0, 0, 0, 0, time.Local)
		curr1T := time.Date(currDate.Year(), 6, 30, 0, 0, 0, 0, time.Local)
		curr2T := time.Date(currDate.Year(), 12, 31, 0, 0, 0, 0, time.Local)

		if currDate.Month() <= 6 { // 上半年
			days = utils.GetTimeSubDay(curr0T, curr1T)
		} else {
			// 下半年
			days = utils.GetTimeSubDay(curr1T, curr2T)
		}
	default:
		days = 1
		return
	}
	return
}

func rjzDiv(a float64, b int) string {
	var valStr string
	if b != 0 {
		af := decimal.NewFromFloat(a)
		bf := decimal.NewFromFloat(float64(b))
		val, _ := af.Div(bf).Float64()
		valStr = decimal.NewFromFloat(val).Round(4).String()
	} else {
		valStr = "0"
	}
	return valStr
}