package data

import (
	"eta/eta_chart_lib/models"
	"eta/eta_chart_lib/utils"
	"time"
)

// GetEdbDataTbzForSeason 获取指标的同比值数据
func GetEdbDataTbzForSeason(frequency string, tmpDataList []*models.EdbDataList, startDateTime time.Time) (dataList []*models.EdbDataList, minValue, maxValue float64, err error) {
	dataList = make([]*models.EdbDataList, 0)

	// 数据处理
	var dateArr []string
	dataMap := make(map[string]*models.EdbDataList)
	for _, v := range tmpDataList {
		dateArr = append(dateArr, v.DataTime)
		dataMap[v.DataTime] = v
	}
	for _, av := range dateArr {
		currentItem, ok := dataMap[av]
		// 如果找不到当前日期的数据,那么终止当前循环,进入下一循环
		if !ok {
			continue
		}
		tmpItem := *currentItem
		var isOk bool //是否计算出来结果

		//当前日期
		currentDate, tmpErr := time.ParseInLocation(utils.FormatDate, av, time.Local)
		if tmpErr != nil {
			err = tmpErr
			return
		}
		// 如果存在开始日期,同时,当前日期早于开始日期,那么终止当前循环,进入下一循环
		if !startDateTime.IsZero() && currentDate.Before(startDateTime) {
			continue
		}
		//上一年的日期
		preDate := currentDate.AddDate(-1, 0, 0)
		preDateStr := preDate.Format(utils.FormatDate)
		if findItem, ok := dataMap[preDateStr]; ok { //上一年同期找到
			tmpItem.Value = TbzDiv(currentItem.Value, findItem.Value)
			isOk = true
		} else {
			if frequency == "月度" { //向上和向下，各找一个月
				for i := 0; i <= 35; i++ {
					nextDateDay := preDate.AddDate(0, 0, i)
					nextDateDayStr := nextDateDay.Format(utils.FormatDate)
					if findItem, ok := dataMap[nextDateDayStr]; ok { //上一年同期->下一个月找到
						tmpItem.Value = TbzDiv(currentItem.Value, findItem.Value)
						isOk = true
						break
					} else {
						preDateDay := preDate.AddDate(0, 0, -i)
						preDateDayStr := preDateDay.Format(utils.FormatDate)
						if findItem, ok := dataMap[preDateDayStr]; ok { //上一年同期->上一个月找到
							tmpItem.Value = TbzDiv(currentItem.Value, findItem.Value)
							isOk = true
							break
						}
					}
				}
			} else if frequency == "季度" || frequency == "年度" {
				if findItem, ok := dataMap[preDateStr]; ok { //上一年同期->下一个月找到
					tmpItem.Value = TbzDiv(currentItem.Value, findItem.Value)
					isOk = true
					break
				}
			} else {
				nextDateDay := preDate.AddDate(0, 0, 1)
				nextDateDayStr := nextDateDay.Format(utils.FormatDate)

				preDateDay := preDate.AddDate(0, 0, -1)
				preDateDayStr := preDateDay.Format(utils.FormatDate)

				for i := 0; i < 35; i++ {
					if i >= 1 {
						nextDateDay = nextDateDay.AddDate(0, 0, i)
						nextDateDayStr = nextDateDay.Format(utils.FormatDate)
					}
					if findItem, ok := dataMap[nextDateDayStr]; ok { //上一年同期->下一个月找到
						tmpItem.Value = TbzDiv(currentItem.Value, findItem.Value)
						isOk = true
						break
					} else {
						if i >= 1 {
							preDateDay = preDate.AddDate(0, 0, -i)
							preDateDayStr = nextDateDay.Format(utils.FormatDate)
						}
						if findItem, ok := dataMap[preDateDayStr]; ok { //上一年同期->上一个月找到
							tmpItem.Value = TbzDiv(currentItem.Value, findItem.Value)
							isOk = true
							break
						}
					}
				}
			}
		}

		if isOk {
			if tmpItem.Value > maxValue {
				maxValue = tmpItem.Value
			}
			if tmpItem.Value < minValue {
				minValue = tmpItem.Value
			}
			dataList = append(dataList, &tmpItem)
		}
	}

	return
}