/* ======================================================
 * JFreeChart : a chart library for the Java(tm) platform
 * ======================================================
 *
 * (C) Copyright 2000-present, by David Gilbert and Contributors.
 *
 * Project Info:  https://www.jfree.org/jfreechart/index.html
 *
 * This library is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation; either version 2.1 of the License, or
 * (at your option) any later version.
 *
 * This library 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 Lesser General Public
 * License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
 * USA.
 *
 * [Oracle and Java are registered trademarks of Oracle and/or its affiliates. 
 * Other names may be trademarks of their respective owners.]
 *
 * ----------------
 * QuarterTest.java
 * ----------------
 * (C) Copyright 2001-present, by David Gilbert.
 *
 * Original Author:  David Gilbert;
 * Contributor(s):   -;
 *
 */

package org.jfree.data.time;

import static org.junit.jupiter.api.Assertions.assertTrue;
import static org.junit.jupiter.api.Assertions.assertFalse;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertNull;

import java.time.ZoneOffset;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.Locale;
import java.util.TimeZone;
import java.util.function.Consumer;

import org.jfree.chart.TestUtils;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;

/**
 * Tests for the {link Quarter} class.
 */
public class QuarterTest {

    /** A quarter. */
    private Quarter q1Y1900;

    /** A quarter. */
    private Quarter q2Y1900;

    /** A quarter. */
    private Quarter q3Y9999;

    /** A quarter. */
    private Quarter q4Y9999;

    /**
     * Common test setup.
     */
    @BeforeEach
    public void setUp() {
        this.q1Y1900 = new Quarter(1, 1900);
        this.q2Y1900 = new Quarter(2, 1900);
        this.q3Y9999 = new Quarter(3, 9999);
        this.q4Y9999 = new Quarter(4, 9999);
    }

    /**
     * Check that a Quarter instance is equal to itself.
     *
     * SourceForge Bug ID: 558850.
     */
    @Test
    public void testEqualsSelf() {
        Quarter quarter = new Quarter();
        assertEquals(quarter, quarter);
    }

    /**
     * Tests the equals method.
     */
    @Test
    public void testEquals() {
        Quarter q1 = new Quarter(2, 2002);
        Quarter q2 = new Quarter(2, 2002);
        assertEquals(q1, q2);
    }

    /**
     * In GMT, the end of Q1 2002 is java.util.Date(1017619199999L).  Use this
     * to check the quarter constructor.
     */
    @Test
    public void testDateConstructor1() {

        TimeZone zone = TimeZone.getTimeZone("GMT");
        Calendar cal = Calendar.getInstance(zone);
        Quarter q1 = new Quarter(new Date(1017619199999L), zone, Locale.getDefault());
        Quarter q2 = new Quarter(new Date(1017619200000L), zone, Locale.getDefault());

        assertEquals(1, q1.getQuarter());
        assertEquals(1017619199999L, q1.getLastMillisecond(cal));

        assertEquals(2, q2.getQuarter());
        assertEquals(1017619200000L, q2.getFirstMillisecond(cal));

    }

    /**
     * In Istanbul, the end of Q1 2002 is java.util.Date(1017608399999L).  Use
     * this to check the quarter constructor.
     */
    @Test
    public void testDateConstructor2() {

        TimeZone zone = TimeZone.getTimeZone("Europe/Istanbul");
        Calendar cal = Calendar.getInstance(zone);
        Quarter q1 = new Quarter(new Date(1017608399999L), zone, Locale.getDefault());
        Quarter q2 = new Quarter(new Date(1017608400000L), zone, Locale.getDefault());

        assertEquals(1, q1.getQuarter());
        assertEquals(1017608399999L, q1.getLastMillisecond(cal));

        assertEquals(2, q2.getQuarter());
        assertEquals(1017608400000L, q2.getFirstMillisecond(cal));

    }

    /**
     * If a thread-local calendar was set, the Date constructor should use it.
     */
    @Test
    public void testDateConstructorWithThreadLocalCalendar() {
        Consumer<Integer> calendarSetup = hours -> RegularTimePeriod.setThreadLocalCalendarInstance(
                Calendar.getInstance(TimeZone.getTimeZone(ZoneOffset.ofHours(hours)))
        );
        testDateConstructorWithCustomCalendar(3, calendarSetup);
        testDateConstructorWithCustomCalendar(4, calendarSetup);
    }

    /**
     * If a calendar prototype was set, the Date constructor should use it.
     */
    @Test
    public void testDateConstructorWithCalendarPrototype() {
        Consumer<Integer> calendarSetup = hours -> RegularTimePeriod.setCalendarInstancePrototype(
                Calendar.getInstance(TimeZone.getTimeZone(ZoneOffset.ofHours(hours)))
        );
        testDateConstructorWithCustomCalendar(3, calendarSetup);
        testDateConstructorWithCustomCalendar(4, calendarSetup);
    }

    private void testDateConstructorWithCustomCalendar(int hoursOffset, Consumer<Integer> calendarSetup) {
        try {
            calendarSetup.accept(hoursOffset);
            long ms = -3_600_000L * hoursOffset;
            Quarter q = new Quarter(new Date(ms));
            assertEquals(1970, q.getYear().getYear());
            assertEquals(1, q.getQuarter());
            assertEquals(ms, q.getFirstMillisecond());
        } finally {
            // reset everything, to avoid affecting other tests
            RegularTimePeriod.setThreadLocalCalendarInstance(null);
            RegularTimePeriod.setCalendarInstancePrototype(null);
        }
    }

    /**
     * If a thread-local calendar was set, the (int, int) quarter-year constructor should use it.
     */
    @Test
    public void testQuarterIntYearConstructorWithThreadLocalCalendar() {
        Consumer<Integer> calendarSetup = hours -> RegularTimePeriod.setThreadLocalCalendarInstance(
                Calendar.getInstance(TimeZone.getTimeZone(ZoneOffset.ofHours(hours)))
        );
        testQuarterIntYearConstructorWithCustomCalendar(3, calendarSetup);
        testQuarterIntYearConstructorWithCustomCalendar(4, calendarSetup);
    }

    /**
     * If a calendar prototype was set, the the (int, int) quarter-year constructor should use it.
     */
    @Test
    public void testQuarterIntYearConstructorWithCalendarPrototype() {
        Consumer<Integer> calendarSetup = hours -> RegularTimePeriod.setCalendarInstancePrototype(
                Calendar.getInstance(TimeZone.getTimeZone(ZoneOffset.ofHours(hours)))
        );
        testQuarterIntYearConstructorWithCustomCalendar(3, calendarSetup);
        testQuarterIntYearConstructorWithCustomCalendar(4, calendarSetup);
    }

    private void testQuarterIntYearConstructorWithCustomCalendar(int hoursOffset, Consumer<Integer> calendarSetup) {
        try {
            calendarSetup.accept(hoursOffset);
            Quarter q = new Quarter(1, 1970);
            assertEquals(1970, q.getYear().getYear());
            assertEquals(1, q.getQuarter());
            assertEquals(-3_600_000L * hoursOffset, q.getFirstMillisecond());
        } finally {
            // reset everything, to avoid affecting other tests
            RegularTimePeriod.setThreadLocalCalendarInstance(null);
            RegularTimePeriod.setCalendarInstancePrototype(null);
        }
    }

    /**
     * If a thread-local calendar was set, the (int, Year) quarter-year constructor should use it.
     */
    @Test
    public void testQuarterYearConstructorWithThreadLocalCalendar() {
        Consumer<Integer> calendarSetup = hours -> RegularTimePeriod.setThreadLocalCalendarInstance(
                Calendar.getInstance(TimeZone.getTimeZone(ZoneOffset.ofHours(hours)))
        );
        testQuarterYearConstructorWithCustomCalendar(3, calendarSetup);
        testQuarterYearConstructorWithCustomCalendar(4, calendarSetup);
    }

    /**
     * If a calendar prototype was set, the the (int, Year) quarter-year constructor should use it.
     */
    @Test
    public void testQuarterYearConstructorWithCalendarPrototype() {
        Consumer<Integer> calendarSetup = hours -> RegularTimePeriod.setCalendarInstancePrototype(
                Calendar.getInstance(TimeZone.getTimeZone(ZoneOffset.ofHours(hours)))
        );
        testQuarterYearConstructorWithCustomCalendar(3, calendarSetup);
        testQuarterYearConstructorWithCustomCalendar(4, calendarSetup);
    }

    private void testQuarterYearConstructorWithCustomCalendar(int hoursOffset, Consumer<Integer> calendarSetup) {
        try {
            calendarSetup.accept(hoursOffset);
            Quarter q = new Quarter(1, new Year(1970));
            assertEquals(1970, q.getYear().getYear());
            assertEquals(1, q.getQuarter());
            assertEquals(-3_600_000L * hoursOffset, q.getFirstMillisecond());
        } finally {
            // reset everything, to avoid affecting other tests
            RegularTimePeriod.setThreadLocalCalendarInstance(null);
            RegularTimePeriod.setCalendarInstancePrototype(null);
        }
    }

    /**
     * Set up a quarter equal to Q1 1900.  Request the previous quarter, it
     * should be null.
     */
    @Test
    public void testQ1Y1900Previous() {
        Quarter previous = (Quarter) this.q1Y1900.previous();
        assertNull(previous);
    }

    /**
     * Set up a quarter equal to Q1 1900.  Request the next quarter, it should
     * be Q2 1900.
     */
    @Test
    public void testQ1Y1900Next() {
        Quarter next = (Quarter) this.q1Y1900.next();
        assertEquals(this.q2Y1900, next);
    }

    /**
     * Set up a quarter equal to Q4 9999.  Request the previous quarter, it
     * should be Q3 9999.
     */
    @Test
    public void testQ4Y9999Previous() {
        Quarter previous = (Quarter) this.q4Y9999.previous();
        assertEquals(this.q3Y9999, previous);
    }

    /**
     * Set up a quarter equal to Q4 9999.  Request the next quarter, it should
     * be null.
     */
    @Test
    public void testQ4Y9999Next() {
        Quarter next = (Quarter) this.q4Y9999.next();
        assertNull(next);
    }

    /**
     * Test the string parsing code...
     */
    @Test
    public void testParseQuarter() {

        Quarter quarter = null;

        // test 1...
        try {
            quarter = Quarter.parseQuarter("Q1-2000");
        }
        catch (TimePeriodFormatException e) {
            quarter = new Quarter(1, 1900);
        }
        assertEquals(1, quarter.getQuarter());
        assertEquals(2000, quarter.getYear().getYear());

        // test 2...
        try {
            quarter = Quarter.parseQuarter("2001-Q2");
        }
        catch (TimePeriodFormatException e) {
            quarter = new Quarter(1, 1900);
        }
        assertEquals(2, quarter.getQuarter());
        assertEquals(2001, quarter.getYear().getYear());

        // test 3...
        try {
            quarter = Quarter.parseQuarter("Q3, 2002");
        }
        catch (TimePeriodFormatException e) {
            quarter = new Quarter(1, 1900);
        }
        assertEquals(3, quarter.getQuarter());
        assertEquals(2002, quarter.getYear().getYear());

    }

    /**
     * Serialize an instance, restore it, and check for equality.
     */
    @Test
    public void testSerialization() {
        Quarter q1 = new Quarter(4, 1999);
        Quarter q2 = TestUtils.serialised(q1);
        assertEquals(q1, q2);
    }

    /**
     * Two objects that are equal are required to return the same hashCode.
     */
    @Test
    public void testHashcode() {
        Quarter q1 = new Quarter(2, 2003);
        Quarter q2 = new Quarter(2, 2003);
        assertEquals(q1, q2);
        int h1 = q1.hashCode();
        int h2 = q2.hashCode();
        assertEquals(h1, h2);
    }

    /**
     * The {@link Quarter} class is immutable, so should not be
     * {@link Cloneable}.
     */
    @Test
    public void testNotCloneable() {
        Quarter q = new Quarter(2, 2003);
        assertFalse(q instanceof Cloneable);
    }

    /**
     * Some tests for the constructor with (int, int) arguments.  Covers bug
     * report 1377239.
     */
    @Test
    public void testConstructor() {
        boolean pass = false;
        try {
            /*Quarter q =*/ new Quarter(0, 2005);
        }
        catch (IllegalArgumentException e) {
            pass = true;
        }
        assertTrue(pass);

        pass = false;
        try {
            /*Quarter q =*/ new Quarter(5, 2005);
        }
        catch (IllegalArgumentException e) {
            pass = true;
        }
        assertTrue(pass);
    }

    /**
     * Some checks for the getFirstMillisecond() method.
     */
    @Test
    public void testGetFirstMillisecond() {
        Locale saved = Locale.getDefault();
        Locale.setDefault(Locale.UK);
        TimeZone savedZone = TimeZone.getDefault();
        TimeZone.setDefault(TimeZone.getTimeZone("Europe/London"));
        Quarter q = new Quarter(3, 1970);
        assertEquals(15634800000L, q.getFirstMillisecond());
        Locale.setDefault(saved);
        TimeZone.setDefault(savedZone);
    }

    /**
     * Some checks for the getFirstMillisecond(TimeZone) method.
     */
    @Test
    public void testGetFirstMillisecondWithTimeZone() {
        Quarter q = new Quarter(2, 1950);
        TimeZone zone = TimeZone.getTimeZone("America/Los_Angeles");
        Calendar cal = Calendar.getInstance(zone);
        assertEquals(-623347200000L, q.getFirstMillisecond(cal));

        // try null calendar
        boolean pass = false;
        try {
            q.getFirstMillisecond((Calendar) null);
        }
        catch (NullPointerException e) {
            pass = true;
        }
        assertTrue(pass);
    }

    /**
     * Some checks for the getFirstMillisecond(TimeZone) method.
     */
    @Test
    public void testGetFirstMillisecondWithCalendar() {
        Quarter q = new Quarter(1, 2001);
        GregorianCalendar calendar = new GregorianCalendar(Locale.GERMANY);
        calendar.setTimeZone(TimeZone.getTimeZone("Europe/Frankfurt"));
        assertEquals(978307200000L, q.getFirstMillisecond(calendar));

        // try null calendar
        boolean pass = false;
        try {
            q.getFirstMillisecond((Calendar) null);
        }
        catch (NullPointerException e) {
            pass = true;
        }
        assertTrue(pass);
    }

    /**
     * Some checks for the getLastMillisecond() method.
     */
    @Test
    public void testGetLastMillisecond() {
        Locale saved = Locale.getDefault();
        Locale.setDefault(Locale.UK);
        TimeZone savedZone = TimeZone.getDefault();
        TimeZone.setDefault(TimeZone.getTimeZone("Europe/London"));
        Quarter q = new Quarter(3, 1970);
        assertEquals(23583599999L, q.getLastMillisecond());
        Locale.setDefault(saved);
        TimeZone.setDefault(savedZone);
    }

    /**
     * Some checks for the getLastMillisecond(TimeZone) method.
     */
    @Test
    public void testGetLastMillisecondWithTimeZone() {
        Quarter q = new Quarter(2, 1950);
        TimeZone zone = TimeZone.getTimeZone("America/Los_Angeles");
        Calendar cal = Calendar.getInstance(zone);
        assertEquals(-615488400001L, q.getLastMillisecond(cal));

        // try null calendar
        boolean pass = false;
        try {
            q.getLastMillisecond((Calendar) null);
        }
        catch (NullPointerException e) {
            pass = true;
        }
        assertTrue(pass);
    }

    /**
     * Some checks for the getLastMillisecond(TimeZone) method.
     */
    @Test
    public void testGetLastMillisecondWithCalendar() {
        Quarter q = new Quarter(3, 2001);
        GregorianCalendar calendar = new GregorianCalendar(Locale.GERMANY);
        calendar.setTimeZone(TimeZone.getTimeZone("Europe/Frankfurt"));
        assertEquals(1001894399999L, q.getLastMillisecond(calendar));

        // try null calendar
        boolean pass = false;
        try {
            q.getLastMillisecond((Calendar) null);
        }
        catch (NullPointerException e) {
            pass = true;
        }
        assertTrue(pass);
    }

    /**
     * Some checks for the getSerialIndex() method.
     */
    @Test
    public void testGetSerialIndex() {
        Quarter q = new Quarter(1, 2000);
        assertEquals(8001L, q.getSerialIndex());
        q = new Quarter(1, 1900);
        assertEquals(7601L, q.getSerialIndex());
    }

    @Test
    public void testNextPrevious() {
        Quarter q = new Quarter(1, 2000);
        q = (Quarter) q.next();
        assertEquals(new Year(2000), q.getYear());
        assertEquals(2, q.getQuarter());
        q = (Quarter) q.previous();
        assertEquals(new Year(2000), q.getYear());
        assertEquals(1, q.getQuarter());
        q = new Quarter(4, 9999);
        assertNull(q.next());
    }

    /**
     * If a thread-local calendar was set, next() and previous() should use its time zone.
     */
    @Test
    public void testNextPreviousWithThreadLocalCalendar() {
        Consumer<Integer> calendarSetup = hours -> RegularTimePeriod.setThreadLocalCalendarInstance(
                Calendar.getInstance(TimeZone.getTimeZone(ZoneOffset.ofHours(hours)))
        );
        testNextPreviousWithCustomCalendar(3, calendarSetup);
        testNextPreviousWithCustomCalendar(4, calendarSetup);
    }

    /**
     * If a calendar prototype was set, next() should use its time zone.
     */
    @Test
    public void testNextPreviousWithCalendarPrototype() {
        Consumer<Integer> calendarSetup = hours -> RegularTimePeriod.setCalendarInstancePrototype(
                Calendar.getInstance(TimeZone.getTimeZone(ZoneOffset.ofHours(hours)))
        );
        testNextPreviousWithCustomCalendar(3, calendarSetup);
        testNextPreviousWithCustomCalendar(4, calendarSetup);
    }

    private void testNextPreviousWithCustomCalendar(int hoursOffset, Consumer<Integer> calendarSetup) {
        try {
            calendarSetup.accept(hoursOffset);
            long ms = -hoursOffset * 3_600_000L;
            Quarter q = new Quarter(new Date(ms));
            q = (Quarter) q.next();
            assertEquals(1970, q.getYear().getYear());
            assertEquals(2, q.getQuarter());
            assertEquals(ms + 86_400_000L * (31 + 28 + 31), q.getFirstMillisecond());
            q = (Quarter) q.previous();
            assertEquals(1970, q.getYear().getYear());
            assertEquals(1, q.getQuarter());
            assertEquals(ms, q.getFirstMillisecond());
        } finally {
            // reset everything, to avoid affecting other tests
            RegularTimePeriod.setThreadLocalCalendarInstance(null);
            RegularTimePeriod.setCalendarInstancePrototype(null);
        }
    }

    /**
     * Some checks for the getStart() method.
     */
    @Test
    public void testGetStart() {
        Locale saved = Locale.getDefault();
        Locale.setDefault(Locale.ITALY);
        Calendar cal = Calendar.getInstance(Locale.ITALY);
        cal.set(2006, Calendar.JULY, 1, 0, 0, 0);
        cal.set(Calendar.MILLISECOND, 0);
        Quarter q = new Quarter(3, 2006);
        assertEquals(cal.getTime(), q.getStart());
        Locale.setDefault(saved);
    }

    /**
     * Some checks for the getEnd() method.
     */
    @Test
    public void testGetEnd() {
        Locale saved = Locale.getDefault();
        Locale.setDefault(Locale.ITALY);
        Calendar cal = Calendar.getInstance(Locale.ITALY);
        cal.set(2006, Calendar.MARCH, 31, 23, 59, 59);
        cal.set(Calendar.MILLISECOND, 999);
        Quarter q = new Quarter(1, 2006);
        assertEquals(cal.getTime(), q.getEnd());
        Locale.setDefault(saved);
    }
}