/*
 * Copyright (C) 2017 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package androidx.transition;

import static org.hamcrest.MatcherAssert.assertThat;
import static org.hamcrest.Matchers.hasItem;
import static org.hamcrest.Matchers.hasSize;
import static org.hamcrest.Matchers.is;
import static org.hamcrest.Matchers.sameInstance;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertSame;

import android.animation.TimeInterpolator;
import android.graphics.Rect;
import android.support.test.filters.MediumTest;
import android.view.View;
import android.view.ViewGroup;
import android.view.animation.AccelerateDecelerateInterpolator;
import android.view.animation.DecelerateInterpolator;

import androidx.transition.test.R;

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

@MediumTest
public class TransitionSetTest extends BaseTest {

    private final TransitionSet mTransitionSet = new TransitionSet();
    private final Transition mTransition = new TransitionTest.EmptyTransition();

    @Before
    public void setUp() {
        // mTransitionSet has 1 item from the start
        mTransitionSet.addTransition(mTransition);
    }

    @Test
    public void testOrdering() {
        assertThat(mTransitionSet.getOrdering(), is(TransitionSet.ORDERING_TOGETHER));
        assertThat(mTransitionSet.setOrdering(TransitionSet.ORDERING_SEQUENTIAL),
                is(sameInstance(mTransitionSet)));
        assertThat(mTransitionSet.getOrdering(), is(TransitionSet.ORDERING_SEQUENTIAL));
    }

    @Test
    public void testAddAndRemoveTransition() {
        assertThat(mTransitionSet.getTransitionCount(), is(1));
        assertThat(mTransitionSet.getTransitionAt(0), is(sameInstance(mTransition)));
        Transition anotherTransition = new TransitionTest.EmptyTransition();
        assertThat(mTransitionSet.addTransition(anotherTransition),
                is(sameInstance(mTransitionSet)));
        assertThat(mTransitionSet.getTransitionCount(), is(2));
        assertThat(mTransitionSet.getTransitionAt(0), is(sameInstance(mTransition)));
        assertThat(mTransitionSet.getTransitionAt(1), is(sameInstance(anotherTransition)));
        assertThat(mTransitionSet.removeTransition(mTransition),
                is(sameInstance(mTransitionSet)));
        assertThat(mTransitionSet.getTransitionCount(), is(1));
    }

    @Test
    public void testSetDuration() {
        assertThat(mTransitionSet.setDuration(123), is(sameInstance(mTransitionSet)));
        assertThat(mTransitionSet.getDuration(), is(123L));
        assertThat(mTransition.getDuration(), is(123L));
    }

    @Test
    public void testTargetId() {
        assertThat(mTransitionSet.addTarget(R.id.view0), is(sameInstance(mTransitionSet)));
        assertThat(mTransitionSet.getTargetIds(), hasItem(R.id.view0));
        assertThat(mTransitionSet.getTargetIds(), hasSize(1));
        assertThat(mTransition.getTargetIds(), hasItem(R.id.view0));
        assertThat(mTransition.getTargetIds(), hasSize(1));
        assertThat(mTransitionSet.removeTarget(R.id.view0), is(sameInstance(mTransitionSet)));
        assertThat(mTransitionSet.getTargetIds(), hasSize(0));
        assertThat(mTransition.getTargetIds(), hasSize(0));
    }

    @Test
    public void testTargetView() {
        final View view = new View(rule.getActivity());
        assertThat(mTransitionSet.addTarget(view), is(sameInstance(mTransitionSet)));
        assertThat(mTransitionSet.getTargets(), hasItem(view));
        assertThat(mTransitionSet.getTargets(), hasSize(1));
        assertThat(mTransition.getTargets(), hasItem(view));
        assertThat(mTransition.getTargets(), hasSize(1));
        assertThat(mTransitionSet.removeTarget(view), is(sameInstance(mTransitionSet)));
        assertThat(mTransitionSet.getTargets(), hasSize(0));
        assertThat(mTransition.getTargets(), hasSize(0));
    }

    @Test
    public void testTargetName() {
        assertThat(mTransitionSet.addTarget("abc"), is(sameInstance(mTransitionSet)));
        assertThat(mTransitionSet.getTargetNames(), hasItem("abc"));
        assertThat(mTransitionSet.getTargetNames(), hasSize(1));
        assertThat(mTransition.getTargetNames(), hasItem("abc"));
        assertThat(mTransition.getTargetNames(), hasSize(1));
        assertThat(mTransitionSet.removeTarget("abc"), is(sameInstance(mTransitionSet)));
        assertThat(mTransitionSet.getTargetNames(), hasSize(0));
        assertThat(mTransition.getTargetNames(), hasSize(0));
    }

    @Test
    public void testTargetClass() {
        assertThat(mTransitionSet.addTarget(View.class), is(sameInstance(mTransitionSet)));
        assertThat(mTransitionSet.getTargetTypes(), hasItem(View.class));
        assertThat(mTransitionSet.getTargetTypes(), hasSize(1));
        assertThat(mTransition.getTargetTypes(), hasItem(View.class));
        assertThat(mTransition.getTargetTypes(), hasSize(1));
        assertThat(mTransitionSet.removeTarget(View.class), is(sameInstance(mTransitionSet)));
        assertThat(mTransitionSet.getTargetTypes(), hasSize(0));
        assertThat(mTransition.getTargetTypes(), hasSize(0));
    }

    @Test
    public void testSetPropagation() {
        final TransitionPropagation propagation = new SidePropagation();
        mTransitionSet.setPropagation(propagation);
        assertThat(mTransitionSet.getPropagation(), is(propagation));
        assertThat(mTransition.getPropagation(), is(propagation));
    }

    @Test
    public void testSetTransferValuesDuringAdd() throws Throwable {
        Fade fade = new Fade();
        fade.setDuration(500);
        fade.setPropagation(new TestPropagation());
        fade.setEpicenterCallback(new Transition.EpicenterCallback() {
            @Override
            public Rect onGetEpicenter(Transition transition) {
                return null;
            }
        });
        fade.setInterpolator(new AccelerateDecelerateInterpolator());
        fade.setPathMotion(new ArcMotion());

        TransitionSet transitionSet = new TransitionSet();
        int duration = 100;
        TestPropagation propagation = new TestPropagation();
        TimeInterpolator interpolator = new DecelerateInterpolator();
        PathMotion pathMotion = new ArcMotion();
        Transition.EpicenterCallback epicenterCallback = new Transition.EpicenterCallback() {
            @Override
            public Rect onGetEpicenter(Transition transition) {
                return null;
            }
        };
        transitionSet.setDuration(duration);
        transitionSet.setPropagation(propagation);
        transitionSet.setInterpolator(interpolator);
        transitionSet.setPathMotion(pathMotion);
        transitionSet.setEpicenterCallback(epicenterCallback);

        transitionSet.addTransition(fade);
        assertEquals(duration, fade.getDuration());
        assertSame(propagation, fade.getPropagation());
        assertSame(interpolator, fade.getInterpolator());
        assertSame(pathMotion, fade.getPathMotion());
        assertSame(epicenterCallback, fade.getEpicenterCallback());
    }

    @Test
    public void testSetTransferNullValuesDuringAdd() throws Throwable {
        Fade fade = new Fade();
        fade.setDuration(500);
        fade.setPropagation(new TestPropagation());
        fade.setEpicenterCallback(new Transition.EpicenterCallback() {
            @Override
            public Rect onGetEpicenter(Transition transition) {
                return null;
            }
        });
        fade.setInterpolator(new AccelerateDecelerateInterpolator());
        fade.setPathMotion(new ArcMotion());

        TransitionSet transitionSet = new TransitionSet();
        transitionSet.setDuration(0);
        transitionSet.setPropagation(null);
        transitionSet.setInterpolator(null);
        transitionSet.setPathMotion(null);
        transitionSet.setEpicenterCallback(null);

        transitionSet.addTransition(fade);
        assertEquals(0, fade.getDuration());
        assertNull(fade.getPropagation());
        assertNull(fade.getInterpolator());
        assertSame(transitionSet.getPathMotion(), fade.getPathMotion());
        assertNull(fade.getEpicenterCallback());
    }

    @Test
    public void testSetNoTransferValuesDuringAdd() throws Throwable {
        Fade fade = new Fade();
        int duration = 100;
        TestPropagation propagation = new TestPropagation();
        TimeInterpolator interpolator = new DecelerateInterpolator();
        PathMotion pathMotion = new ArcMotion();
        Transition.EpicenterCallback epicenterCallback = new Transition.EpicenterCallback() {
            @Override
            public Rect onGetEpicenter(Transition transition) {
                return null;
            }
        };
        fade.setDuration(duration);
        fade.setPropagation(propagation);
        fade.setInterpolator(interpolator);
        fade.setPathMotion(pathMotion);
        fade.setEpicenterCallback(epicenterCallback);

        TransitionSet transitionSet = new TransitionSet();

        transitionSet.addTransition(fade);
        assertEquals(duration, fade.getDuration());
        assertSame(propagation, fade.getPropagation());
        assertSame(interpolator, fade.getInterpolator());
        assertSame(pathMotion, fade.getPathMotion());
        assertSame(epicenterCallback, fade.getEpicenterCallback());
    }

    private static class TestPropagation extends TransitionPropagation {
        @Override
        public long getStartDelay(ViewGroup sceneRoot, Transition transition,
                TransitionValues startValues, TransitionValues endValues) {
            return 0;
        }

        @Override
        public void captureValues(TransitionValues transitionValues) {
        }

        @Override
        public String[] getPropagationProperties() {
            return new String[] { };
        }
    }
}