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/*
 * Copyright (c) 2014, 2024, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

package javafx.css.converter;

import javafx.css.Size;
import javafx.css.ParsedValue;
import javafx.css.StyleConverter;
import javafx.scene.text.Font;
import javafx.util.Duration;

/**
 * Converter to Convert a {@code Size} to {@code Duration}.
 *
 * @since 9
 */
public final class DurationConverter extends StyleConverter, Duration> {

    // lazy, thread-safe instatiation
    private static class Holder {
        static final DurationConverter INSTANCE = new DurationConverter();
        static final SequenceConverter SEQUENCE_INSTANCE = new SequenceConverter();
    }

    /**
     * Gets the {@code DurationConverter} instance.
     * @return the {@code DurationConverter} instance
     */
    public static StyleConverter, Duration> getInstance() {
        return Holder.INSTANCE;
    }

    private DurationConverter() {
        super();
    }

    @Override
    public Duration convert(ParsedValue, Duration> value, Font font) {
        ParsedValue parsedValue = value.getValue();
        Size size = parsedValue.convert(font);
        double time = size.getValue();
        Duration duration = null;
        if (time < Double.POSITIVE_INFINITY) {
            switch (size.getUnits()) {
                case S:  duration = Duration.seconds(time); break;
                case MS: duration = Duration.millis(time);  break;
                default: duration = Duration.UNKNOWN;
            }
        } else {
            duration = Duration.INDEFINITE;
        }
        return duration;
    }

    @Override
    public String toString() {
        return "DurationConverter";
    }

    /**
     * Converts a sequence of parsed values to an array of {@link Duration} instances.
     *
     * @since 23
     */
    public static final class SequenceConverter extends StyleConverter, Duration>[], Duration[]> {
        /**
         * Gets the {@code SequenceConverter} instance.
         * @return the {@code SequenceConverter} instance
         */
        public static SequenceConverter getInstance() {
            return Holder.SEQUENCE_INSTANCE;
        }

        private SequenceConverter() {}

        @Override
        public Duration[] convert(
                ParsedValue, Duration>[], Duration[]> value, Font font) {
            ParsedValue[] values = value.getValue();
            Duration[] durations = new Duration[values.length];
            for (int p = 0; p < values.length; p++) {
                durations[p] = values[p].convert(font);
            }

            return durations;
        }

        @Override
        public String toString() {
            return "Duration.SequenceConverter";
        }
    }

}