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 * Copyright (c) 2014, 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.
 *
 * 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
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 * questions.
 */

import java.text.SimpleDateFormat;
import java.time.chrono.JapaneseDate;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
import static java.util.GregorianCalendar.*;
import java.util.Locale;
import java.util.TimeZone;

/*
 * Usage:
 *   java SupplementalJapaneseEraTest <flag>
 *    <flag>
 *      -s   prints start time for a test era
 *      -e   prints the English name of the last predefined era
 *
 *   java -Djdk.calendar.japanese.supplemental.era=... SupplementalJapaneseEraTest <flag>
 *      -t   executes tests with a valid property value
 *      -b <eraname>
 *           executes tests with an invalid property value
 *           <eraname> must be the output with -e
 */

public class SupplementalJapaneseEraTest {
    private static final Locale WAREKI_LOCALE = Locale.forLanguageTag("ja-JP-u-ca-japanese");
    private static final String NEW_ERA_NAME = "NewEra";
    private static final String NEW_ERA_ABBR = "N.E.";
    private static int errors = 0;

    public static void main(String[] args) {
        // args[0] is a flag.
        switch (args[0]) {
        case "-s":
            // print the start time of the new era for testing
            Calendar cal = new Calendar.Builder()
                .setCalendarType("japanese")
                .setTimeZone(TimeZone.getTimeZone("GMT"))
                .setDate(200, FEBRUARY, 11)
                .build();
            System.out.println(cal.getTimeInMillis());
            break;

        case "-e":
            // print the current era name in English
            Calendar jcal = new Calendar.Builder()
                .setCalendarType("japanese")
                .setFields(YEAR, 1, DAY_OF_YEAR, 1)
                .build();
            System.out.println(jcal.getDisplayName(ERA, LONG, Locale.US));
            break;

        case "-t":
            // test with a valid property value
            testProperty();
            break;

        case "-b":
            // test with an invalid property value
            // args[1] is the current era name given by -e.
            testValidation(args[1].replace("\r", "")); // remove any CR for Cygwin
            break;
        }
        if (errors != 0) {
            throw new RuntimeException("test failed");
        }
    }

    private static void testProperty() {
        Calendar jcal = new Calendar.Builder()
            .setCalendarType("japanese")
            .setFields(YEAR, 1, DAY_OF_YEAR, 1)
            .build();
        Date firstDayOfEra = jcal.getTime();

        jcal.set(ERA, jcal.get(ERA) - 1); // previous era
        jcal.set(YEAR, 1);
        jcal.set(DAY_OF_YEAR, 1);
        Calendar cal = new GregorianCalendar();
        cal.setTimeInMillis(jcal.getTimeInMillis());
        cal.add(YEAR, 199);
        int year = cal.get(YEAR);

        SimpleDateFormat sdf;
        String expected, got;

        // test long era name
        sdf = new SimpleDateFormat("GGGG y-MM-dd", WAREKI_LOCALE);
        got = sdf.format(firstDayOfEra);
        expected = NEW_ERA_NAME + " 1-02-11";
        if (!expected.equals(got)) {
            System.err.printf("GGGG y-MM-dd: got=\"%s\", expected=\"%s\"%n", got, expected);
            errors++;
        }

        // test era abbreviation
        sdf = new SimpleDateFormat("G y-MM-dd", WAREKI_LOCALE);
        got = sdf.format(firstDayOfEra);
        expected = NEW_ERA_ABBR+" 1-02-11";
        if (!expected.equals(got)) {
            System.err.printf("GGGG y-MM-dd: got=\"%s\", expected=\"%s\"%n", got, expected);
            errors++;
        }

        // confirm the gregorian year
        sdf = new SimpleDateFormat("y", Locale.US);
        int y = Integer.parseInt(sdf.format(firstDayOfEra));
        if (y != year) {
            System.err.printf("Gregorian year: got=%d, expected=%d%n", y, year);
            errors++;
        }

        // test java.time.chrono.JapaneseEra
        JapaneseDate jdate = JapaneseDate.of(year, 2, 11);
        got = jdate.toString();
        expected = "Japanese " + NEW_ERA_NAME + " 1-02-11";
        if (!expected.equals(got)) {
            System.err.printf("JapaneseDate: got=\"%s\", expected=\"%s\"%n", got, expected);
            errors++;
        }
    }

    private static void testValidation(String eraName) {
        Calendar jcal = new Calendar.Builder()
            .setCalendarType("japanese")
            .setFields(YEAR, 1, DAY_OF_YEAR, 1)
            .build();
        if (!jcal.getDisplayName(ERA, LONG, Locale.US).equals(eraName)) {
            errors++;
            String prop = System.getProperty("jdk.calendar.japanese.supplemental.era");
            System.err.println("Era changed with invalid property: " + prop);
        }
    }
}