package etl

import (
	"gullion/currency_convert_ssheets/extractionCleansing"
	"gullion/currency_convert_ssheets/models"
	"gullion/currency_convert_ssheets/timeSeriesDB"
	"sort"
)

func ExtractForexDataFromFile(fileFormatReader extractionCleansing.FileFormatReader) {

	rawData := fileFormatReader.ReadFromFile()

	_, tag, _ := fileFormatReader.GetFileMetaData()
	exchangeRecords := extractionCleansing.ParseToExchangeRecordStruct(rawData, tag)
	sort.SliceStable(exchangeRecords.ExchangeRecords, func(i, j int) bool {
		return exchangeRecords.ExchangeRecords[i].Date.After(exchangeRecords.ExchangeRecords[j].Date)
	})

	latestForexRecord := timeSeriesDB.GetLatestExchangeRecordByTimeStamp(tag)
	deltaForexRecords := models.ExchangeRecords{}

	if len(latestForexRecord.Tag) > 0 {
		for i, newRecord := range exchangeRecords.ExchangeRecords {
			if newRecord.Date.Sub(latestForexRecord.Date) == 0 {
				deltaForexRecords.ExchangeRecords = exchangeRecords.ExchangeRecords[:i]
				break
			}
		}
	} else {
		deltaForexRecords.ExchangeRecords = exchangeRecords.ExchangeRecords
	}

	timeSeriesDB.WriteExchangeRecords(deltaForexRecords)

}