/*

 * 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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 */

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);

        }

    }

}