/*
 * Copyright (C) 2016 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 android.uirendering.cts.testclasses;

import android.animation.Animator;
import android.animation.AnimatorListenerAdapter;
import android.animation.ValueAnimator;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Point;
import android.graphics.Rect;
import android.graphics.drawable.VectorDrawable;
import android.support.test.filters.MediumTest;
import android.support.test.runner.AndroidJUnit4;
import android.uirendering.cts.R;
import android.uirendering.cts.bitmapverifiers.RectVerifier;
import android.uirendering.cts.bitmapverifiers.SamplePointVerifier;
import android.uirendering.cts.testinfrastructure.ActivityTestBase;

import android.uirendering.cts.testinfrastructure.ViewInitializer;
import android.view.View;
import android.widget.FrameLayout;
import org.junit.Test;
import org.junit.runner.RunWith;
import java.util.concurrent.CountDownLatch;
import android.animation.Animator;

@MediumTest
@RunWith(AndroidJUnit4.class)
public class VectorDrawableTests extends ActivityTestBase {
    @Test
    public void testScaleDown() {
        VectorDrawable vd = (VectorDrawable) getActivity().getResources().getDrawable(
                R.drawable.rectangle, null);
        createTest()
                .addCanvasClient((canvas, width, height) -> {
                    canvas.scale(0.5f, 0.5f);
                    vd.setBounds(new Rect(0, 0, 50, 50));
                    vd.draw(canvas);
                })
                .runWithVerifier(
                        new RectVerifier(Color.WHITE, Color.RED, new Rect(0, 0, 25, 25)));
    }

    class VectorDrawableView extends View {
        private VectorDrawable mVd;
        private Rect mVdBounds;

        public VectorDrawableView(Context context) {
            super(context);
            mVd = (VectorDrawable) context.getResources().getDrawable(R.drawable.circle, null);
        }

        @Override
        protected void onDraw(Canvas canvas) {
            mVd.setBounds(mVdBounds);
            mVd.draw(canvas);
        }

        public void setVDSize(Rect vdBounds) {
            mVdBounds = vdBounds;
        }
    }

    /*
     * The following test verifies that VectorDrawable.setBounds invalidates the bitmap cache.
     */
    @Test
    public void testInvalidateCache() {
        CountDownLatch testFinishedFence = new CountDownLatch(1);

        ViewInitializer initializer = new ViewInitializer() {
            ValueAnimator mAnimator;

            @Override
            public void initializeView(View view) {
                FrameLayout root = (FrameLayout) view.findViewById(R.id.frame_layout);
                root.setBackgroundColor(Color.BLUE);

                final VectorDrawableView child = new VectorDrawableView(view.getContext());

                child.setLayoutParams(new FrameLayout.LayoutParams(ActivityTestBase.TEST_WIDTH,
                    ActivityTestBase.TEST_HEIGHT));
                // VectorDrawable is a red circle drawn on top of a blue background.
                // The first frame has VectorDrawable size set to 1x1 pixels, which deforms
                // the red circle into a 1x1 red-ish square.
                // An animation grows VectorDrawable bounds from 0x0 to 90x90. If VD cache is
                // refreshed, then we should see a red circle on top of a blue background.
                // If VD cache is stale, then VD will upscale the original 1x1 cached image to
                // 90x90 red-ish square.
                // At the end of the animation, we verify the color of top left pixel, which should
                // be a blue background pixel.
                child.setVDSize(new Rect(0, 0, 2, 2)); //first draw with VD size set to 1x1 pixels.
                root.addView(child);

                mAnimator = ValueAnimator.ofFloat(0, 1);
                mAnimator.setRepeatCount(0);
                mAnimator.setDuration(400);
                mAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
                    @Override
                    public void onAnimationUpdate(ValueAnimator animation) {
                        float progress = (float) mAnimator.getAnimatedValue();
                        child.setVDSize(new Rect(0, 0, (int)(progress*child.getWidth()),
                                (int)(progress*child.getHeight())));
                        child.invalidate();
                    }
                });
                mAnimator.addListener(
                    new AnimatorListenerAdapter() {
                        @Override
                        public void onAnimationEnd(Animator animation) {
                            super.onAnimationEnd(animation);
                            testFinishedFence.countDown();
                        }
                    });

                mAnimator.start();
            }

            @Override
            public void teardownView() {
              mAnimator.cancel();
            }
        };

        createTest()
            .addLayout(R.layout.frame_layout, initializer, true, testFinishedFence)
            .runWithVerifier(new SamplePointVerifier(
                new Point[] { new Point(0, 0) },
                new int[] { 0xff0000ff }
            ));
    }
}