package eu.dnetlib.ariadneplus.reader.utils;

import java.time.LocalDate;
import java.time.format.DateTimeFormatter;
import java.time.format.DateTimeFormatterBuilder;
import java.time.temporal.ChronoField;

public class ESUtils {
    private static DateTimeFormatter originalRecordDateFormatter = DateTimeFormatter.ofPattern("dd MMM yyyy");
    private static DateTimeFormatter elasticSearchDateFormatter = DateTimeFormatter.ofPattern("yyyy-MM-dd");
    private static DateTimeFormatter yearOnlyDateFormatter = new DateTimeFormatterBuilder()
            .appendPattern("yyyy")
            .parseDefaulting(ChronoField.MONTH_OF_YEAR, 1)
            .parseDefaulting(ChronoField.DAY_OF_MONTH, 1)
            .toFormatter();

    public static String getESFormatDate(String originalDate) {
        try {
            LocalDate parsedDate = LocalDate.parse(originalDate, originalRecordDateFormatter);
            return parsedDate.format(elasticSearchDateFormatter);
        } catch (Exception e) {
            LocalDate parsedDate = LocalDate.parse(originalDate, yearOnlyDateFormatter);
            return parsedDate.format(yearOnlyDateFormatter);
        }
    }
}