package com.megatim.fdxcommons.tools.database.queries.metadata;

import com.megatim.fdxcommons.tools.database.exceptions.LocalDateTimeValueParseError;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.time.YearMonth;
import java.time.format.DateTimeFormatter;
import java.time.format.DateTimeParseException;

/**
 *
 * @author Gabuntu
 */
public class CriteriaLocalDateTimeValue {

    private final String format;
    private final Object value;

    public CriteriaLocalDateTimeValue(String format, Object value) {
        this.format = format;
        this.value = value;
    }

    public LocalDateTime value() throws LocalDateTimeValueParseError {
        final String stringValue = value.toString();

        try {
            if ((format.length() == 8 || format.length() == 10) && format.contains("yyyy") && format.contains("MM") && format.contains("dd")) {

                LocalDate localDate = LocalDate.parse(stringValue, DateTimeFormatter.ofPattern("yyyy-MM-dd"));
                return localDate.atTime(LocalTime.MIN);

            } else if ((format.length() == 6 || format.length() == 8) && format.contains("yyyy") && format.contains("MM")) {
                YearMonth yearMonth = YearMonth.parse(stringValue, DateTimeFormatter.ofPattern("yyyy-MM"));
                return LocalDateTime.from(yearMonth.atDay(1));

            } else if (format.length() == 4 && format.equals("yyyy")) {
                return LocalDateTime.of(Integer.parseInt(stringValue), 1, 1, 0, 0, 0, 0);
            }

        } catch (DateTimeParseException e) {
            throw new LocalDateTimeValueParseError("Impossible de parser la valeur " + value + " au format " + format);
        }

        throw new LocalDateTimeValueParseError("Impossible de parser la valeur " + value + " au format " + format);
    }

}