/*
 * Copyright (c) 2011, 2015, 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.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * 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
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

package test.javafx.beans.property;

import javafx.beans.property.IntegerProperty;
import javafx.beans.property.IntegerPropertyBase;
import javafx.beans.property.SimpleIntegerProperty;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;

import test.javafx.beans.InvalidationListenerMock;
import test.javafx.beans.value.ChangeListenerMock;
import javafx.beans.value.ObservableIntegerValueStub;
import javafx.beans.value.ObservableValueStub;

import org.junit.Before;
import org.junit.Test;

public class IntegerPropertyBaseTest {

    private static final Object NO_BEAN = null;
    private static final String NO_NAME_1 = null;
    private static final String NO_NAME_2 = "";
    private static final Integer UNDEFINED = Integer.MAX_VALUE;
    private static final int VALUE_1 = 42;
    private static final int VALUE_2 = 12345;

    private IntegerPropertyMock property;
    private InvalidationListenerMock invalidationListener;
    private ChangeListenerMock<Number> changeListener;

    @Before
    public void setUp() throws Exception {
        property = new IntegerPropertyMock();
        invalidationListener = new InvalidationListenerMock();
        changeListener = new ChangeListenerMock<Number>(UNDEFINED);
    }

    private void attachInvalidationListener() {
        property.addListener(invalidationListener);
        property.get();
        invalidationListener.reset();
    }

    private void attachChangeListener() {
        property.addListener(changeListener);
        property.get();
        changeListener.reset();
    }

    @Test
    public void testConstructor() {
        final IntegerProperty p1 = new SimpleIntegerProperty();
        assertEquals(0, p1.get());
        assertEquals(Integer.valueOf(0), p1.getValue());
        assertFalse(property.isBound());

        final IntegerProperty p2 = new SimpleIntegerProperty(-VALUE_1);
        assertEquals(-VALUE_1, p2.get());
        assertEquals(Integer.valueOf(-VALUE_1), p2.getValue());
        assertFalse(property.isBound());
    }

    @Test
    public void testInvalidationListener() {
        attachInvalidationListener();
        property.set(VALUE_2);
        invalidationListener.check(property, 1);
        property.removeListener(invalidationListener);
        invalidationListener.reset();
        property.set(VALUE_1);
        invalidationListener.check(null, 0);
    }

    @Test
    public void testChangeListener() {
        attachChangeListener();
        property.set(VALUE_2);
        changeListener.check(property, 0, VALUE_2, 1);
        property.removeListener(changeListener);
        changeListener.reset();
        property.set(VALUE_1);
        changeListener.check(null, UNDEFINED, UNDEFINED, 0);
    }

    @Test
    public void testLazySet() {
        attachInvalidationListener();

        // set value once
        property.set(VALUE_2);
        assertEquals(VALUE_2, property.get());
        property.check(1);
        invalidationListener.check(property, 1);

        // set same value again
        property.set(VALUE_2);
        assertEquals(VALUE_2, property.get());
        property.check(0);
        invalidationListener.check(null, 0);

        // set value twice without reading
        property.set(VALUE_1);
        property.set(-VALUE_1);
        assertEquals(-VALUE_1, property.get());
        property.check(1);
        invalidationListener.check(property, 1);
    }

    @Test
    public void testEagerSet() {
        attachChangeListener();

        // set value once
        property.set(VALUE_2);
        assertEquals(VALUE_2, property.get());
        property.check(1);
        changeListener.check(property, 0, VALUE_2, 1);

        // set same value again
        property.set(VALUE_2);
        assertEquals(VALUE_2, property.get());
        property.check(0);
        changeListener.check(null, UNDEFINED, UNDEFINED, 0);

        // set value twice without reading
        property.set(VALUE_1);
        property.set(-VALUE_1);
        assertEquals(-VALUE_1, property.get());
        property.check(2);
        changeListener.check(property, VALUE_1, -VALUE_1, 2);
    }

    @Test
    public void testLazySetValue() {
        attachInvalidationListener();

        // set value once
        property.setValue(VALUE_2);
        assertEquals(VALUE_2, property.get());
        property.check(1);
        invalidationListener.check(property, 1);

        // set same value again
        property.setValue(VALUE_2);
        assertEquals(VALUE_2, property.get());
        property.check(0);
        invalidationListener.check(null, 0);

        // set value twice without reading
        property.setValue(VALUE_1);
        property.setValue(-VALUE_1);
        assertEquals(-VALUE_1, property.get());
        property.check(1);
        invalidationListener.check(property, 1);
    }

    @Test
    public void testEagerSetValue() {
        attachChangeListener();

        // set value once
        property.setValue(VALUE_2);
        assertEquals(VALUE_2, property.get());
        property.check(1);
        changeListener.check(property, 0, VALUE_2, 1);

        // set same value again
        property.setValue(VALUE_2);
        assertEquals(VALUE_2, property.get());
        property.check(0);
        changeListener.check(null, UNDEFINED, UNDEFINED, 0);

        // set value twice without reading
        property.setValue(VALUE_1);
        property.setValue(-VALUE_1);
        assertEquals(-VALUE_1, property.get());
        property.check(2);
        changeListener.check(property, VALUE_1, -VALUE_1, 2);
    }

    @Test(expected=RuntimeException.class)
    public void testSetBoundValue() {
        final IntegerProperty v = new SimpleIntegerProperty(VALUE_1);
        property.bind(v);
        property.set(VALUE_1);
    }

    @Test
    public void testLazyBind() {
        attachInvalidationListener();
        final ObservableIntegerValueStub v = new ObservableIntegerValueStub(VALUE_1);

        property.bind(v);
        assertEquals(VALUE_1, property.get());
        assertTrue(property.isBound());
        property.check(1);
        invalidationListener.check(property, 1);

        // change binding once
        v.set(VALUE_2);
        assertEquals(VALUE_2, property.get());
        property.check(1);
        invalidationListener.check(property, 1);

        // change binding twice without reading
        v.set(VALUE_1);
        v.set(-VALUE_1);
        assertEquals(-VALUE_1, property.get());
        property.check(1);
        invalidationListener.check(property, 1);

        // change binding twice to same value
        v.set(VALUE_1);
        v.set(VALUE_1);
        assertEquals(VALUE_1, property.get());
        property.check(1);
        invalidationListener.check(property, 1);
    }

    @Test
    public void testEagerBind() {
        attachChangeListener();
        final ObservableIntegerValueStub v = new ObservableIntegerValueStub(VALUE_1);

        property.bind(v);
        assertEquals(VALUE_1, property.get());
        assertTrue(property.isBound());
        property.check(1);
        changeListener.check(property, 0, VALUE_1, 1);

        // change binding once
        v.set(VALUE_2);
        assertEquals(VALUE_2, property.get());
        property.check(1);
        changeListener.check(property, VALUE_1, VALUE_2, 1);

        // change binding twice without reading
        v.set(VALUE_1);
        v.set(-VALUE_1);
        assertEquals(-VALUE_1, property.get());
        property.check(2);
        changeListener.check(property, VALUE_1, -VALUE_1, 2);

        // change binding twice to same value
        v.set(VALUE_1);
        v.set(VALUE_1);
        assertEquals(VALUE_1, property.get());
        property.check(2);
        changeListener.check(property, -VALUE_1, VALUE_1, 1);
    }

    @Test
    public void testLazyBindObservableValue() {
        final int value1 = 42;
        final int value2 = -7;
        attachInvalidationListener();
        final ObservableValueStub<Number> v = new ObservableValueStub<Number>(value1);

        property.bind(v);
        assertEquals(value1, property.get());
        assertTrue(property.isBound());
        property.check(1);
        invalidationListener.check(property, 1);

        // change binding once
        v.set(value2);
        assertEquals(value2, property.get());
        property.check(1);
        invalidationListener.check(property, 1);

        // change binding twice without reading
        v.set(value1);
        v.set(value2);
        assertEquals(value2, property.get());
        property.check(1);
        invalidationListener.check(property, 1);

        // change binding twice to same value
        v.set(value1);
        v.set(value1);
        assertEquals(value1, property.get());
        property.check(1);
        invalidationListener.check(property, 1);

        // set binding to null
        v.set(null);
        assertEquals(0, property.get());
        property.check(1);
        invalidationListener.check(property, 1);
    }

    @Test
    public void testEagerBindObservableValue() {
        final int value1 = 42;
        final int value2 = -7;
        attachChangeListener();
        final ObservableValueStub<Number> v = new ObservableValueStub<Number>(value1);

        property.bind(v);
        assertEquals(value1, property.get());
        assertTrue(property.isBound());
        property.check(1);
        changeListener.check(property, 0, value1, 1);

        // change binding once
        v.set(value2);
        assertEquals(value2, property.get());
        property.check(1);
        changeListener.check(property, value1, value2, 1);

        // change binding twice without reading
        v.set(value1);
        v.set(value2);
        assertEquals(value2, property.get());
        property.check(2);
        changeListener.check(property, value1, value2, 2);

        // change binding twice to same value
        v.set(value1);
        v.set(value1);
        assertEquals(value1, property.get());
        property.check(2);
        changeListener.check(property, value2, value1, 1);
    }

    @Test(expected=NullPointerException.class)
    public void testBindToNull() {
        property.bind(null);
    }

    @Test
    public void testRebind() {
        attachInvalidationListener();
        final IntegerProperty v1 = new SimpleIntegerProperty(VALUE_1);
        final IntegerProperty v2 = new SimpleIntegerProperty(VALUE_2);
        property.bind(v1);
        property.get();
        property.reset();
        invalidationListener.reset();

        // rebind causes invalidation event
        property.bind(v2);
        assertEquals(VALUE_2, property.get());
        assertTrue(property.isBound());
        assertEquals(1, property.counter);
        invalidationListener.check(property, 1);
        property.reset();

        // change old binding
        v1.set(-VALUE_1);
        assertEquals(VALUE_2, property.get());
        assertEquals(0, property.counter);
        invalidationListener.check(null, 0);
        property.reset();

        // change new binding
        v2.set(-VALUE_2);
        assertEquals(-VALUE_2, property.get());
        assertEquals(1, property.counter);
        invalidationListener.check(property, 1);
        property.reset();

        // rebind to same observable should have no effect
        property.bind(v2);
        assertEquals(-VALUE_2, property.get());
        assertTrue(property.isBound());
        assertEquals(0, property.counter);
        invalidationListener.check(null, 0);
    }

    @Test
    public void testUnbind() {
        attachInvalidationListener();
        final IntegerProperty v = new SimpleIntegerProperty(VALUE_1);
        property.bind(v);
        property.unbind();
        assertEquals(VALUE_1, property.get());
        assertFalse(property.isBound());
        property.reset();
        invalidationListener.reset();

        // change binding
        v.set(VALUE_2);
        assertEquals(VALUE_1, property.get());
        assertEquals(0, property.counter);
        invalidationListener.check(null, 0);
        property.reset();

        // set value
        property.set(-VALUE_1);
        assertEquals(-VALUE_1, property.get());
        assertEquals(1, property.counter);
        invalidationListener.check(property, 1);
    }

    @Test
    public void testUnbindObservableValue() {
        final int value1 = 13;
        final int value2 = -42;

        attachInvalidationListener();
        final ObservableValueStub<Number> v = new ObservableValueStub<Number>(value1);
        property.bind(v);
        property.unbind();
        assertEquals(value1, property.get());
        assertFalse(property.isBound());
        property.reset();
        invalidationListener.reset();

        // change binding
        v.set(value2);
        assertEquals(value1, property.get());
        assertEquals(0, property.counter);
        invalidationListener.check(null, 0);
        property.reset();

        // set value
        property.set(value2);
        assertEquals(value2, property.get());
        assertEquals(1, property.counter);
        invalidationListener.check(property, 1);
    }

    @Test
    public void testAddingListenerWillAlwaysReceiveInvalidationEvent() {
        final IntegerProperty v = new SimpleIntegerProperty(VALUE_1);
        final InvalidationListenerMock listener2 = new InvalidationListenerMock();
        final InvalidationListenerMock listener3 = new InvalidationListenerMock();

        // setting the property
        property.set(VALUE_1);
        property.addListener(listener2);
        listener2.reset();
        property.set(-VALUE_1);
        listener2.check(property, 1);

        // binding the property
        property.bind(v);
        v.set(VALUE_2);
        property.addListener(listener3);
        v.get();
        listener3.reset();
        v.set(-VALUE_2);
        listener3.check(property, 1);
    }

    @Test
    public void testToString() {
        final int value1 = 1234567890;
        final int value2 = -987654321;
        final IntegerProperty v = new SimpleIntegerProperty(value2);

        property.set(value1);
        assertEquals("IntegerProperty [value: " + value1 + "]", property.toString());

        property.bind(v);
        assertEquals("IntegerProperty [bound, invalid]", property.toString());
        property.get();
        assertEquals("IntegerProperty [bound, value: " + value2 + "]", property.toString());
        v.set(value1);
        assertEquals("IntegerProperty [bound, invalid]", property.toString());
        property.get();
        assertEquals("IntegerProperty [bound, value: " + value1 + "]", property.toString());

        final Object bean = new Object();
        final String name = "My name";
        final IntegerProperty v1 = new IntegerPropertyMock(bean, name);
        assertEquals("IntegerProperty [bean: " + bean.toString() + ", name: My name, value: " + 0 + "]", v1.toString());
        v1.set(value1);
        assertEquals("IntegerProperty [bean: " + bean.toString() + ", name: My name, value: " + value1 + "]", v1.toString());

        final IntegerProperty v2 = new IntegerPropertyMock(bean, NO_NAME_1);
        assertEquals("IntegerProperty [bean: " + bean.toString() + ", value: " + 0 + "]", v2.toString());
        v2.set(value1);
        assertEquals("IntegerProperty [bean: " + bean.toString() + ", value: " + value1 + "]", v2.toString());

        final IntegerProperty v3 = new IntegerPropertyMock(bean, NO_NAME_2);
        assertEquals("IntegerProperty [bean: " + bean.toString() + ", value: " + 0 + "]", v3.toString());
        v3.set(value1);
        assertEquals("IntegerProperty [bean: " + bean.toString() + ", value: " + value1 + "]", v3.toString());

        final IntegerProperty v4 = new IntegerPropertyMock(NO_BEAN, name);
        assertEquals("IntegerProperty [name: My name, value: " + 0 + "]", v4.toString());
        v4.set(value1);
        assertEquals("IntegerProperty [name: My name, value: " + value1 + "]", v4.toString());
    }

    private static class IntegerPropertyMock extends IntegerPropertyBase {

        private final Object bean;
        private final String name;
        private int counter;

        private IntegerPropertyMock() {
            this.bean = NO_BEAN;
            this.name = NO_NAME_1;
        }

        private IntegerPropertyMock(Object bean, String name) {
            this.bean = bean;
            this.name = name;
        }

        @Override
        protected void invalidated() {
            counter++;
        }

        private void check(int expected) {
            assertEquals(expected, counter);
            reset();
        }

        private void reset() {
            counter = 0;
        }

        @Override public Object getBean() { return bean; }

        @Override public String getName() { return name; }
    }

}
