package models

import (
	"errors"
	"eta_gn/eta_index_lib/global"
	"eta_gn/eta_index_lib/utils"
	"fmt"
	"gorm.io/gorm"

	"github.com/shopspring/decimal"
	"strconv"
	"strings"
	"time"
)

// SavePredictCalculateHcz 新增环差值指标
func SavePredictCalculateHcz(req *EdbInfoCalculateBatchSaveReq, fromEdbInfo *EdbInfo, edbCode, uniqueCode string, sysUserId int, sysUserRealName string, formulaInt int, lang string) (edbInfo *EdbInfo, latestDateStr string, latestValue float64, err error) {
	to := global.DEFAULT_DmSQL.Begin()
	defer func() {
		if err != nil {
			to.Rollback()
		} else {
			to.Commit()
		}
	}()
	if req.EdbInfoId <= 0 {
		edbInfo = new(EdbInfo)
		edbInfo.EdbInfoType = 1
		edbInfo.Source = utils.DATA_SOURCE_PREDICT_CALCULATE_HCZ
		edbInfo.SourceName = "预测环差值"
		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.PREDICT_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
			err = to.Create(calculateMappingItem).Error
			if err != nil {
				return
			}
		}
	} else {
		edbInfo, err = GetEdbInfoById(req.EdbInfoId)
		if err != nil {
			return
		}
		latestDateStr = edbInfo.LatestDate
		latestValue = edbInfo.LatestValue
		oldCalculateFormula := edbInfo.CalculateFormula
		//修改指标信息
		switch 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.CalculateFormula = req.Formula
		edbInfo.ModifyTime = time.Now()
		err = to.Model(edbInfo).Select([]string{"EdbName", "EdbNameSource", "Frequency", "Unit", "ClassifyId", "CalculateFormula", "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)

		var count int
		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 && strconv.Itoa(formulaInt) == oldCalculateFormula { // 指标未被替换，同时N值未修改，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
		if count <= 0 {
			sql := ` DELETE FROM edb_info_calculate_mapping 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_PREDICT_CALCULATE_HCZ,
					SourceName:                "预测环差值",
					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(),
				}
				err = to.Create(calculateMappingItem).Error
				if err != nil {
					return
				}
			}
		}
		//清空原有数据
		sql := ` DELETE FROM edb_data_predict_calculate_hcz WHERE edb_info_id = ? `
		err = to.Exec(sql, edbInfo.EdbInfoId).Error
		if err != nil {
			return
		}
	}

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

	return
}

// RefreshAllPredictCalculateHcz 刷新所有环差值数据
func RefreshAllPredictCalculateHcz(edbInfoId, source, subSource int, fromEdbInfo *EdbInfo, edbCode, startDate, endDate string, formulaInt int) (latestDateStr string, latestValue float64, err error) {
	to := global.DEFAULT_DmSQL.Begin()
	defer func() {
		if err != nil {
			to.Rollback()
		} else {
			to.Commit()
		}
	}()

	//计算数据
	latestDateStr, latestValue, err = refreshAllPredictCalculateHcz(to, edbInfoId, source, subSource, fromEdbInfo, edbCode, startDate, endDate, formulaInt)
	return
}

// refreshAllPredictCalculateHcz 刷新所有环差值数据
func refreshAllPredictCalculateHcz(to *gorm.DB, edbInfoId, source, subSource int, fromEdbInfo *EdbInfo, edbCode, startDate, endDate string, formulaInt int) (latestDateStr string, latestValue float64, err error) {
	edbInfoIdStr := strconv.Itoa(edbInfoId)
	// 获取关联指标数据
	dataList, err := GetPredictEdbDataListAllByStartDate(fromEdbInfo, 0, "")
	if err != nil {
		return
	}
	latestDateStr = fromEdbInfo.LatestDate
	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, subSource)

	//获取指标所有数据
	existDataList, err := GetAllEdbDataListByTo(to, edbInfoId, source, subSource)
	if err != nil {
		return
	}
	existDataMap := make(map[string]string)
	removeDateMap := make(map[string]string) //需要移除的日期
	for _, v := range existDataList {
		existDataMap[v.DataTime] = v.Value
		removeDateMap[v.DataTime] = v.DataTime
	}
	//fmt.Println("existDataMap:", existDataMap)
	addSql := ` INSERT INTO edb_data_predict_calculate_hcz(edb_info_id,edb_code,data_time,value,create_time,modify_time,data_timestamp) values `
	var isAdd bool
	existMap := make(map[string]string)
	dataLen := len(dataList)
	fmt.Println("dataLen:", dataLen)
	for i := 0; i < dataLen; i++ {
		j := i + formulaInt
		if j < dataLen {
			//当期
			currentItem := dataList[i]
			preItem := dataList[j]
			if currentItem != nil && preItem != nil {
				existKey := edbCode + currentItem.DataTime
				if _, ok := existMap[existKey]; !ok {

					currentDate, _ := time.ParseInLocation(utils.FormatDate, currentItem.DataTime, time.Local)
					//fmt.Println(currentDate)
					timestamp := currentDate.UnixNano() / 1e6
					timestampStr := fmt.Sprintf("%d", timestamp)
					val := HczDiv(currentItem.Value, preItem.Value)
					if val != "" {
						if fromEdbInfo.LatestDate == currentItem.DataTime {
							latestValueDecimal, tmpErr := decimal.NewFromString(val)
							if tmpErr != nil {
								err = tmpErr
								return
							}
							latestValue, _ = latestValueDecimal.Truncate(4).Float64() //保留4位小数
						}
						// 有计算出来值，那么就从待删除指标中移除
						delete(removeDateMap, currentItem.DataTime)

						if existVal, findOk := existDataMap[currentItem.DataTime]; !findOk {
							addSql += GetAddSql(edbInfoIdStr, edbCode, currentItem.DataTime, timestampStr, val)
							isAdd = true
						} else {
							var existValDecimal decimal.Decimal
							existValDecimal, err = decimal.NewFromString(existVal)
							if err != nil {
								return
							}
							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, currentItem.DataTime).Error
								if err != nil {
									return
								}
							}
						}
					}
				}
				existMap[existKey] = currentItem.DataTime
			}
		}
	}
	if isAdd {
		addSql = strings.TrimRight(addSql, ",")
		err = to.Exec(addSql).Error
		if err != nil {
			return
		}
	}

	//fmt.Println(removeDateMap)
	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, subSource)
		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
		}
	}
	return
}