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/*

 * @test

 * @bug 4958050

 * @summary Make sure that add() and roll() handle time zone offset changes (both raw and DST) correctly.

 */

import java.util.Locale;

import java.util.TimeZone;

import static java.util.Calendar.*;

public class Bug4958050 {

    static int errorCount = 0;

    public static void main(String[] args) {

        // All the test cases depend on historical GMT offset changes

        // of Asia/Novosibirsk.

        Koyomi cal = new Koyomi(TimeZone.getTimeZone("Asia/Novosibirsk"), Locale.US);

        System.out.println("Time zone = " + cal.getTimeZone().getID());

        // Test the week fields

        int[] weekFields = {WEEK_OF_YEAR, WEEK_OF_MONTH, DAY_OF_WEEK_IN_MONTH};

        for (int i = 0; i < weekFields.length; i++) {

            int field = weekFields[i];

            // add()

            cal.clear();

            cal.set(1919, DECEMBER, 14 - 7, 23, 50, 00);

            cal.add(weekFields[i], +1);

            if (!cal.checkDate(1919, DECEMBER, 14)) {

                error("1919/12/07: add(" + Koyomi.getFieldName(weekFields[i]) + ", +1)\n"

                        + cal.getMessage() + " " + cal.toDateTimeString());

            }

            cal.clear();

            cal.set(1930, JUNE, 21 - 7);

            cal.add(weekFields[i], +1);

            if (!cal.checkDateTime(1930, JUNE, 21, 01, 00, 00, 000)) {

                error("1930/6/14: add(" + Koyomi.getFieldName(weekFields[i]) + ", +1)\n"

                        + cal.getMessage() + " " + cal.toDateTimeString());

            }

            // roll()

            cal.clear();

            cal.set(1919, DECEMBER, 14 - 7, 23, 50, 00);

            cal.roll(weekFields[i], +1);

            if (!cal.checkDate(1919, DECEMBER, 14)) {

                error("1919/12/07: roll(" + Koyomi.getFieldName(weekFields[i]) + ", +1)\n"

                        + cal.getMessage() + " " + cal.toDateTimeString());

            }

            cal.clear();

            cal.set(1930, JUNE, 21 - 7);

            cal.roll(weekFields[i], +1);

            if (!cal.checkDateTime(1930, JUNE, 21, 01, 00, 00, 000)) {

                error("1930/6/14: roll(" + Koyomi.getFieldName(weekFields[i]) + ", +1)\n"

                        + cal.getMessage() + " " + cal.toDateTimeString());

            }

        }

        // Test the day fields

        int[] dayFields = {DAY_OF_MONTH, DAY_OF_YEAR, DAY_OF_WEEK};

        for (int i = 0; i < dayFields.length; i++) {

            int field = dayFields[i];

            // add()

            cal.clear();

            cal.set(1919, DECEMBER, 14 - 1, 23, 50, 00);

            cal.add(field, +1);

            if (!cal.checkDate(1919, DECEMBER, 14)) {

                error("1919/12/13: add(" + Koyomi.getFieldName(field) + ", +1)\n"

                        + cal.getMessage() + " " + cal.toDateTimeString());

            }

            cal.clear();

            cal.set(1919, DECEMBER, 14, 00, 00, 00);

            cal.add(field, -1);

            if (!cal.checkDate(1919, DECEMBER, 13)) {

                error("1919/12/14: add(" + Koyomi.getFieldName(field) + ", -1)\n"

                        + cal.getMessage() + " " + cal.toDateTimeString());

            }

            cal.clear();

            cal.set(1930, JUNE, 21 - 1);

            cal.add(field, +1);

            if (!cal.checkDateTime(1930, JUNE, 21, 01, 00, 00, 000)) {

                error("1930/6/20: add(" + Koyomi.getFieldName(field) + ", +1)\n"

                        + cal.getMessage() + cal.toDateTimeString());

            }

            cal.clear();

            cal.set(1930, JUNE, 21, 01, 00, 00);

            cal.add(field, -1);

            if (!cal.checkDateTime(1930, JUNE, 20, 01, 00, 00, 000)) {

                error("1930/6/21: add(" + Koyomi.getFieldName(field) + ", -1)\n"

                        + cal.getMessage() + " " + cal.toDateTimeString());

            }

            // roll()

            cal.clear();

            cal.set(1930, JUNE, 21 - 1);

            int amount = +1;

            if (field == DAY_OF_WEEK) {

                amount += 700;

            }

            cal.roll(field, amount);

            if (!cal.checkDateTime(1930, JUNE, 21, 01, 00, 00, 000)) {

                error("1930/6/20: roll(" + Koyomi.getFieldName(field) + ", +" + amount + ")\n"

                        + cal.getMessage() + " " + cal.toDateTimeString());

            }

            cal.clear();

            cal.set(1930, JUNE, 21, 01, 00, 00);

            amount = -1;

            if (field == DAY_OF_WEEK) {

                amount -= 700;

            }

            cal.roll(field, amount);

            if (!cal.checkDateTime(1930, JUNE, 20, 01, 00, 00, 000)) {

                error("1930/6/21: roll(" + Koyomi.getFieldName(field) + ", " + amount + ")\n"

                        + cal.getMessage() + " " + cal.toDateTimeString());

            }

        }

        // Test the AM_PM field

        // add()

        cal.clear();

        cal.set(1919, DECEMBER, 14 - 1, 23, 50, 00);

        cal.add(AM_PM, +1);

        if (!cal.checkDate(1919, DECEMBER, 14)

                || !cal.checkFieldValue(AM_PM, AM)) {

            error("1919/12/13: add(AM_PM, +1)\n"

                    + cal.getMessage() + " " + cal.toDateTimeString());

        }

        cal.clear();

        cal.set(1930, JUNE, 21 - 1, 12, 00, 00);

        cal.add(AM_PM, +1);

        if (!cal.checkDate(1930, JUNE, 21)

                || !cal.checkFieldValue(AM_PM, AM)) {

            error("1930/6/20: add(AM_PM, +1)\n"

                    + cal.getMessage() + " " + cal.toDateTimeString());

        }

        cal.clear();

        cal.set(1930, JUNE, 21 - 2, 12, 00, 00);

        cal.add(AM_PM, +3);

        if (!cal.checkDate(1930, JUNE, 21)

                || !cal.checkFieldValue(AM_PM, AM)) {

            error("1930/6/10: add(AM_PM, +3)\n"

                    + cal.getMessage() + " " + cal.toDateTimeString());

        }

        cal.clear();

        cal.set(1919, DECEMBER, 14, 11, 50, 00);

        cal.add(AM_PM, -1);

        if (!cal.checkDateTime(1919, DECEMBER, 14 - 1, 23, 50, 00, 000)

                || !cal.checkFieldValue(AM_PM, PM)) {

            error("1919/12/14 11:50:00: add(AM_PM, -1)\n"

                    + cal.getMessage() + " " + cal.toDateTimeString());

        }

        cal.clear();

        cal.set(1930, JUNE, 21, 01, 00, 00);

        cal.add(AM_PM, -1);

        if (!cal.checkDateTime(1930, JUNE, 21 - 1, 01 + 12, 00, 00, 000)

                || !cal.checkFieldValue(AM_PM, PM)) {

            error("1930/6/20: add(AM_PM, -1)\n"

                    + cal.getMessage() + " " + cal.toDateTimeString());

        }

        cal.clear();

        cal.set(1930, JUNE, 21, 01, 00, 00);

        cal.add(AM_PM, -3);

        if (!cal.checkDateTime(1930, JUNE, 21 - 2, 01 + 12, 00, 00, 000)

                || !cal.checkFieldValue(AM_PM, PM)) {

            error("1930/6/10: add(AM_PM, -3)\n"

                    + cal.getMessage() + " " + cal.toDateTimeString());

        }

        // roll() (should NOT change the date)

        cal.clear();

        cal.set(1919, DECEMBER, 14 - 1, 23, 50, 00);

        cal.roll(AM_PM, +1);

        if (!cal.checkDateTime(1919, DECEMBER, 14 - 1, 23 - 12, 50, 00, 000)

                || !cal.checkFieldValue(AM_PM, AM)) {

            error("1919/12/13: roll(AM_PM, +1)\n"

                    + cal.getMessage() + " " + cal.toDateTimeString());

        }

        cal.clear();

        cal.set(1930, JUNE, 21 - 1, 12, 00, 00);

        cal.roll(AM_PM, +1);

        if (!cal.checkDateTime(1930, JUNE, 21 - 1, 12 - 12, 00, 00, 000)

                || !cal.checkFieldValue(AM_PM, AM)) {

            error("1930/6/20: roll(AM_PM, +1)\n"

                    + cal.getMessage() + " " + cal.toDateTimeString());

        }

        cal.clear();

        cal.set(1930, JUNE, 21 - 2, 12, 00, 00);

        cal.roll(AM_PM, +3);

        if (!cal.checkDateTime(1930, JUNE, 21 - 2, 12 - 12, 00, 00, 000)

                || !cal.checkFieldValue(AM_PM, AM)) {

            error("1930/6/10: roll(AM_PM, +3)\n"

                    + cal.getMessage() + " " + cal.toDateTimeString());

        }

        // Test the HOUR_OF_DAY field

        // add()

        cal.clear();

        cal.set(1930, JUNE, 20, 23, 00, 00);

        cal.add(HOUR_OF_DAY, +1);

        if (!cal.checkDateTime(1930, JUNE, 21, 01, 00, 00, 000)) {

            error("1930/6/20 23:00:00: add(HOUR_OF_DAY, +1)\n"

                    + cal.getMessage() + " " + cal.toDateTimeString());

        }

        // roll() (should NOT change the date)

        cal.clear();

        cal.set(1930, JUNE, 20, 23, 00, 00);

        cal.roll(HOUR_OF_DAY, +1);

        if (!cal.checkDateTime(1930, JUNE, 20, 00, 00, 00, 000)) {

            error("1930/6/20 23:00:00: roll(HOUR_OF_DAY, +1)\n"

                    + cal.getMessage() + " " + cal.toDateTimeString());

        }

        checkErrors();

    }

    static void error(String s) {

        System.out.println(s);

        errorCount++;

    }

    static void checkErrors() {

        if (errorCount > 0) {

            throw new RuntimeException("Failed: " + errorCount + " error(s)");

        }

    }

}