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/*
 * Copyright 2017 ~ 2025 the original author or authors. James Wong 
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.wl4g.infra.common.lang.period;

import org.joda.time.DateTime;
import org.joda.time.Period;
import org.joda.time.format.PeriodFormatterBuilder;

import static com.wl4g.infra.common.lang.Assert2.notNullOf;
import static java.util.Locale.*;
import static java.util.Objects.isNull;

import java.util.HashMap;
import java.util.Locale;
import java.util.Map;

/**
 * {@link JodaPeriodFormatter}
 *
 * @author James Wong 
 * @version v1.0 2020年6月16日
 * @since
 */
public class JodaPeriodFormatter extends PeriodFormatter {

    @Override
    public String formatHumanDate(long startTime, long endTime) {
        Period period = new Period(new DateTime(endTime), new DateTime(startTime));
        String elapsed = getPeriodFormatter(CANADA).print(period);
        return cleanupDateEmptyString(elapsed.concat(getLocalizedMessage("period.formatter.ago")));
    }

    /**
     * Gets create period {@link PeriodFormatter} instances.
     * 
     * @param locale
     * @return
     */
    private org.joda.time.format.PeriodFormatter getPeriodFormatter(Locale locale) {
        notNullOf(locale, "locale");

        org.joda.time.format.PeriodFormatter formatter = localizedPeriodFormatters.get(locale);
        if (isNull(formatter)) {
            synchronized (localizedPeriodFormatters) {
                formatter = localizedPeriodFormatters.get(locale);
                if (isNull(formatter)) {
                    PeriodFormatterBuilder builder = new PeriodFormatterBuilder();
                    builder.appendYears().appendSuffix(" ".concat(getLocalizedMessage("period.formatter.year")).concat(" "),
                            " ".concat(getLocalizedMessage("period.formatter.years").concat(" ")));

                    builder.appendMonths().appendSuffix(" ".concat(getLocalizedMessage("period.formatter.month")).concat(" "),
                            " ".concat(getLocalizedMessage("period.formatter.months").concat(" ")));

                    builder.appendWeeks().appendSuffix(" ".concat(getLocalizedMessage("period.formatter.week")).concat(" "),
                            " ".concat(getLocalizedMessage("period.formatter.weeks").concat(" ")));

                    builder.appendDays().appendSuffix(" ".concat(getLocalizedMessage("period.formatter.day")).concat(" "),
                            " ".concat(getLocalizedMessage("period.formatter.days").concat(" ")));

                    builder.appendHours().appendSuffix(" ".concat(getLocalizedMessage("period.formatter.hour")).concat(" "),
                            " ".concat(getLocalizedMessage("period.formatter.hours").concat(" ")));

                    builder.appendMinutes().appendSuffix(" ".concat(getLocalizedMessage("period.formatter.minute")).concat(" "),
                            " ".concat(getLocalizedMessage("period.formatter.minutes").concat(" ")));

                    builder.appendSeconds().appendSuffix(" ".concat(getLocalizedMessage("period.formatter.second")).concat(" "),
                            " ".concat(getLocalizedMessage("period.formatter.seconds").concat(" ")));

                    formatter = builder.printZeroNever().toFormatter();
                    localizedPeriodFormatters.put(locale, formatter);
                }
            }
        }

        return formatter;
    }

    /**
     * Default {@link PeriodFormatter} instances.
     */
    final private static Map localizedPeriodFormatters = new HashMap<>(4);

}