package org.vaadin.miki.shared.dates;

/**
 * Container class with some common {@link DatePattern}s.
 * @author miki
 * @since 2020-04-24
 */
public final class DatePatterns {

    /**
     * Default pattern. Uses full year, zero-prefixed month and day, separated by {@code -}.
     */
    public static final DatePattern YYYY_MM_DD = new DatePattern("yyyy-MM-dd");

    /**
     * Uses zero-prefixed day and month, full year, separated by {@code .}.
     */
    public static final DatePattern DD_MM_YYYY_DOTTED = new DatePattern("dd.MM.yyyy")
            .withDisplayOrder(DatePattern.Order.DAY_MONTH_YEAR)
            .withSeparator('.');

    /**
     * Uses zero-prefixed day and month, optionally full year, separated by {@code .}.
     * For short years the century boundary year is 40 (years less than 40 are from 21st century).
     */
    public static final DatePattern DD_MM_YY_OR_YYYY_DOTTED = new DatePattern("dd.MM.(yy)yy")
            .withDisplayOrder(DatePattern.Order.DAY_MONTH_YEAR)
            .withShortYearAlwaysAccepted(true)
            .withBaseCentury(21).withCenturyBoundaryYear(40).withPreviousCenturyBelowBoundary(false)
            .withSeparator('.');

    /**
     * Uses day, month and short year with century boundary year 40 (years less than 40 are from 21st century), separated by {@code .}.
     */
    public static final DatePattern D_M_YY_DOTTED = new DatePattern("d.M.yy")
            .withDisplayOrder(DatePattern.Order.DAY_MONTH_YEAR)
            .withShortYear(true)
            .withSeparator('.').withZeroPrefixedDay(false).withMonthDisplayMode(DatePattern.MonthDisplayMode.NUMBER)
            .withBaseCentury(21).withCenturyBoundaryYear(40).withPreviousCenturyBelowBoundary(false);

    /**
     * Uses month, day and full year, separated by {@code /}.
     */
    public static final DatePattern M_D_YYYY_SLASH = new DatePattern("M/d/yyyy")
            .withDisplayOrder(DatePattern.Order.MONTH_DAY_YEAR)
            .withSeparator('/').withZeroPrefixedDay(false).withMonthDisplayMode(DatePattern.MonthDisplayMode.NUMBER);

    /**
     * Uses full year, zero-prefixed month and day, and no separator.
     */
    public static final DatePattern YYYYMMDD = new DatePattern("yyyyMMdd")
            .withDisplayOrder(DatePattern.Order.YEAR_MONTH_DAY)
            .withSeparator(DatePattern.NO_SEPARATOR);

    /**
     * Uses zero-prefixed day and month with short year (century boundary year 40, years less than 40 in 21st century), and no separator.
     */
    public static final DatePattern DDMMYY = new DatePattern("ddMMyy")
            .withDisplayOrder(DatePattern.Order.DAY_MONTH_YEAR)
            .withSeparator(DatePattern.NO_SEPARATOR)
            .withShortYear(true)
            .withBaseCentury(21).withCenturyBoundaryYear(40).withPreviousCenturyBelowBoundary(false);

    /**
     * Uses day, four digit year and month name (obtained from locale).
     */
    public static final DatePattern D_MMMM_YYYY = new DatePattern("d MMMM yyyy")
            .withDisplayOrder(DatePattern.Order.DAY_MONTH_YEAR)
            .withSeparator(' ').withZeroPrefixedDay(false)
            .withMonthDisplayMode(DatePattern.MonthDisplayMode.NAME);

    private DatePatterns() {} // instances not needed
}