/*
 * Copyright 2026, Stefan Uebe
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated
 * documentation files (the "Software"), to deal in the Software without restriction, including without limitation the
 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all copies or substantial portions
 * of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
 * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
package org.vaadin.stefan.fullcalendar;

import java.io.Serializable;
import java.time.LocalDate;

/**
 * A range of dates, for example the value of {@link Option#VALID_RANGE}. Either bound may be {@code null} for an
 * open-ended range. The end is exclusive, as in FullCalendar.
 * <pre>{@code
 * // nothing before March 2025
 * calendar.setOption(Option.VALID_RANGE, new DateRange(LocalDate.of(2025, 3, 1), null));
 * }</pre>
 *
 * @param start first date of the range, or {@code null} for an open start
 * @param end   date after the range, or {@code null} for an open end
 */
public record DateRange(LocalDate start, LocalDate end) implements Serializable {

    /**
     * Creates a new range.
     *
     * @throws IllegalArgumentException if both bounds are set and {@code start} is not before {@code end}
     */
    public DateRange {
        if (start != null && end != null && !start.isBefore(end)) {
            throw new IllegalArgumentException("Start must be before end");
        }
    }
}