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/*
 * This file is available under and governed by the GNU General Public
 * License version 2 only, as published by the Free Software Foundation.
 * However, the following notice accompanied the original version of this
 * file:
 *
 * Copyright (c) 2010-2012, Stephen Colebourne & Michael Nascimento Santos
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *  * Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 *
 *  * Redistributions in binary form must reproduce the above copyright notice,
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 *    and/or other materials provided with the distribution.
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 *  * Neither the name of JSR-310 nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
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 */
package tck.java.time.zone;

import static java.time.temporal.ChronoUnit.HOURS;
import static org.junit.Assert.assertEquals;

import java.time.Duration;
import java.time.LocalDateTime;
import java.time.Year;
import java.time.ZoneOffset;
import java.time.zone.ZoneOffsetTransition;

import org.junit.Test;
import tck.java.time.AbstractTCKTest;

/**
 * Test ZoneOffsetTransition.
 */
public class TCKZoneOffsetTransition extends AbstractTCKTest {

    private static final ZoneOffset OFFSET_0100 = ZoneOffset.ofHours(1);
    private static final ZoneOffset OFFSET_0200 = ZoneOffset.ofHours(2);
    private static final ZoneOffset OFFSET_0230 = ZoneOffset.ofHoursMinutes(2, 30);
    private static final ZoneOffset OFFSET_0300 = ZoneOffset.ofHours(3);
    private static final ZoneOffset OFFSET_0400 = ZoneOffset.ofHours(4);

    //-----------------------------------------------------------------------
    // factory
    //-----------------------------------------------------------------------
    @Test(expected=NullPointerException.class)
    public void test_factory_nullTransition() {
        ZoneOffsetTransition.of(null, OFFSET_0100, OFFSET_0200);
    }

    @Test(expected=NullPointerException.class)
    public void test_factory_nullOffsetBefore() {
        ZoneOffsetTransition.of(LocalDateTime.of(2010, 12, 3, 11, 30), null, OFFSET_0200);
    }

    @Test(expected=NullPointerException.class)
    public void test_factory_nullOffsetAfter() {
        ZoneOffsetTransition.of(LocalDateTime.of(2010, 12, 3, 11, 30), OFFSET_0200, null);
    }

    @Test(expected=IllegalArgumentException.class)
    public void test_factory_sameOffset() {
        ZoneOffsetTransition.of(LocalDateTime.of(2010, 12, 3, 11, 30), OFFSET_0200, OFFSET_0200);
    }

    @Test(expected=IllegalArgumentException.class)
    public void test_factory_noNanos() {
        ZoneOffsetTransition.of(LocalDateTime.of(2010, 12, 3, 11, 30, 0, 500), OFFSET_0200, OFFSET_0300);
    }

    //-----------------------------------------------------------------------
    // getters
    //-----------------------------------------------------------------------
    @Test
    public void test_getters_gap() throws Exception {
        LocalDateTime before = LocalDateTime.of(2010, 3, 31, 1, 0);
        LocalDateTime after = LocalDateTime.of(2010, 3, 31, 2, 0);
        ZoneOffsetTransition test = ZoneOffsetTransition.of(before, OFFSET_0200, OFFSET_0300);
        assertEquals(test.isGap(), true);
        assertEquals(test.isOverlap(), false);
        assertEquals(test.getDateTimeBefore(), before);
        assertEquals(test.getDateTimeAfter(), after);
        assertEquals(test.getInstant(), before.toInstant(OFFSET_0200));
        assertEquals(test.getOffsetBefore(), OFFSET_0200);
        assertEquals(test.getOffsetAfter(), OFFSET_0300);
        assertEquals(test.getDuration(), Duration.of(1, HOURS));
    }

    @Test
    public void test_getters_overlap() throws Exception {
        LocalDateTime before = LocalDateTime.of(2010, 10, 31, 1, 0);
        LocalDateTime after = LocalDateTime.of(2010, 10, 31, 0, 0);
        ZoneOffsetTransition test = ZoneOffsetTransition.of(before, OFFSET_0300, OFFSET_0200);
        assertEquals(test.isGap(), false);
        assertEquals(test.isOverlap(), true);
        assertEquals(test.getDateTimeBefore(), before);
        assertEquals(test.getDateTimeAfter(), after);
        assertEquals(test.getInstant(), before.toInstant(OFFSET_0300));
        assertEquals(test.getOffsetBefore(), OFFSET_0300);
        assertEquals(test.getOffsetAfter(), OFFSET_0200);
        assertEquals(test.getDuration(), Duration.of(-1, HOURS));
    }


    //-----------------------------------------------------------------------
    // isValidOffset()
    //-----------------------------------------------------------------------
    @Test
    public void test_isValidOffset_gap() {
        LocalDateTime ldt = LocalDateTime.of(2010, 3, 31, 1, 0);
        ZoneOffsetTransition test = ZoneOffsetTransition.of(ldt, OFFSET_0200, OFFSET_0300);
        assertEquals(test.isValidOffset(OFFSET_0100), false);
        assertEquals(test.isValidOffset(OFFSET_0200), false);
        assertEquals(test.isValidOffset(OFFSET_0230), false);
        assertEquals(test.isValidOffset(OFFSET_0300), false);
        assertEquals(test.isValidOffset(OFFSET_0400), false);
    }

    @Test
    public void test_isValidOffset_overlap() {
        LocalDateTime ldt = LocalDateTime.of(2010, 10, 31, 1, 0);
        ZoneOffsetTransition test = ZoneOffsetTransition.of(ldt, OFFSET_0300, OFFSET_0200);
        assertEquals(test.isValidOffset(OFFSET_0100), false);
        assertEquals(test.isValidOffset(OFFSET_0200), true);
        assertEquals(test.isValidOffset(OFFSET_0230), false);
        assertEquals(test.isValidOffset(OFFSET_0300), true);
        assertEquals(test.isValidOffset(OFFSET_0400), false);
    }

    //-----------------------------------------------------------------------
    // compareTo()
    //-----------------------------------------------------------------------
    @Test
    public void test_compareTo() {
        ZoneOffsetTransition a = ZoneOffsetTransition.of(
            LocalDateTime.ofEpochSecond(23875287L - 1, 0, OFFSET_0200), OFFSET_0200, OFFSET_0300);
        ZoneOffsetTransition b = ZoneOffsetTransition.of(
            LocalDateTime.ofEpochSecond(23875287L, 0, OFFSET_0300), OFFSET_0300, OFFSET_0200);
        ZoneOffsetTransition c = ZoneOffsetTransition.of(
            LocalDateTime.ofEpochSecond(23875287L + 1, 0, OFFSET_0100), OFFSET_0100,OFFSET_0400);

        assertEquals(a.compareTo(a) == 0, true);
        assertEquals(a.compareTo(b) < 0, true);
        assertEquals(a.compareTo(c) < 0, true);

        assertEquals(b.compareTo(a) > 0, true);
        assertEquals(b.compareTo(b) == 0, true);
        assertEquals(b.compareTo(c) < 0, true);

        assertEquals(c.compareTo(a) > 0, true);
        assertEquals(c.compareTo(b) > 0, true);
        assertEquals(c.compareTo(c) == 0, true);
    }

    @Test
    public void test_compareTo_sameInstant() {
        ZoneOffsetTransition a = ZoneOffsetTransition.of(
            LocalDateTime.ofEpochSecond(23875287L, 0, OFFSET_0200), OFFSET_0200, OFFSET_0300);
        ZoneOffsetTransition b = ZoneOffsetTransition.of(
            LocalDateTime.ofEpochSecond(23875287L, 0, OFFSET_0300), OFFSET_0300, OFFSET_0200);
        ZoneOffsetTransition c = ZoneOffsetTransition.of(
            LocalDateTime.ofEpochSecond(23875287L, 0, OFFSET_0100), OFFSET_0100, OFFSET_0400);

        assertEquals(a.compareTo(a) == 0, true);
        assertEquals(a.compareTo(b) == 0, true);
        assertEquals(a.compareTo(c) == 0, true);

        assertEquals(b.compareTo(a) == 0, true);
        assertEquals(b.compareTo(b) == 0, true);
        assertEquals(b.compareTo(c) == 0, true);

        assertEquals(c.compareTo(a) == 0, true);
        assertEquals(c.compareTo(b) == 0, true);
        assertEquals(c.compareTo(c) == 0, true);
    }

    //-----------------------------------------------------------------------
    // equals()
    //-----------------------------------------------------------------------
    @Test
    public void test_equals() {
        LocalDateTime ldtA = LocalDateTime.of(2010, 3, 31, 1, 0);
        ZoneOffsetTransition a1 = ZoneOffsetTransition.of(ldtA, OFFSET_0200, OFFSET_0300);
        ZoneOffsetTransition a2 = ZoneOffsetTransition.of(ldtA, OFFSET_0200, OFFSET_0300);
        LocalDateTime ldtB = LocalDateTime.of(2010, 10, 31, 1, 0);
        ZoneOffsetTransition b = ZoneOffsetTransition.of(ldtB, OFFSET_0300, OFFSET_0200);

        assertEquals(a1.equals(a1), true);
        assertEquals(a1.equals(a2), true);
        assertEquals(a1.equals(b), false);
        assertEquals(a2.equals(a1), true);
        assertEquals(a2.equals(a2), true);
        assertEquals(a2.equals(b), false);
        assertEquals(b.equals(a1), false);
        assertEquals(b.equals(a2), false);
        assertEquals(b.equals(b), true);

        assertEquals(a1.equals(""), false);
        assertEquals(a1.equals(null), false);
    }

    //-----------------------------------------------------------------------
    // hashCode()
    //-----------------------------------------------------------------------
    @Test
    public void test_hashCode_floatingWeek_gap_notEndOfDay() {
        LocalDateTime ldtA = LocalDateTime.of(2010, 3, 31, 1, 0);
        ZoneOffsetTransition a1 = ZoneOffsetTransition.of(ldtA, OFFSET_0200, OFFSET_0300);
        ZoneOffsetTransition a2 = ZoneOffsetTransition.of(ldtA, OFFSET_0200, OFFSET_0300);
        LocalDateTime ldtB = LocalDateTime.of(2010, 10, 31, 1, 0);
        ZoneOffsetTransition b = ZoneOffsetTransition.of(ldtB, OFFSET_0300, OFFSET_0200);

        assertEquals(a1.hashCode(), a1.hashCode());
        assertEquals(a1.hashCode(), a2.hashCode());
        assertEquals(b.hashCode(), b.hashCode());
    }

    //-----------------------------------------------------------------------
    // toString()
    //-----------------------------------------------------------------------
    @Test
    public void test_toString_gap() {
        LocalDateTime ldt = LocalDateTime.of(2010, 3, 31, 1, 0);
        ZoneOffsetTransition test = ZoneOffsetTransition.of(ldt, OFFSET_0200, OFFSET_0300);
        assertEquals(test.toString(), "Transition[Gap at 2010-03-31T01:00+02:00 to +03:00]");
    }

    @Test
    public void test_toString_overlap() {
        LocalDateTime ldt = LocalDateTime.of(2010, 10, 31, 1, 0);
        ZoneOffsetTransition test = ZoneOffsetTransition.of(ldt, OFFSET_0300, OFFSET_0200);
        assertEquals(test.toString(), "Transition[Overlap at 2010-10-31T01:00+03:00 to +02:00]");
    }

}
