/*
 * Copyright (C) 2023 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.server.wm.insets;

import static android.view.WindowInsets.Type.navigationBars;
import static android.view.WindowInsets.Type.statusBars;
import static android.view.WindowInsets.Type.systemBars;
import static android.view.WindowManager.LayoutParams.LAYOUT_IN_DISPLAY_CUTOUT_MODE_ALWAYS;

import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertTrue;
import static org.junit.Assume.assumeFalse;

import android.app.Activity;
import android.content.pm.PackageManager;
import android.graphics.Insets;
import android.os.Bundle;
import android.view.View;
import android.view.Window;
import android.view.WindowInsets;

import androidx.annotation.Nullable;
import androidx.test.platform.app.InstrumentationRegistry;
import androidx.test.rule.ActivityTestRule;

import org.junit.Rule;

import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;

public class ForceRelayoutTestBase {

    @Rule
    public ActivityTestRule<TestActivity> mDecorActivity =
            new ActivityTestRule<>(TestActivity.class);

    void testRelayoutWhenInsetsChange(boolean expectRelayoutWhenInsetsChange, int softInputMode)
            throws Throwable {
        TestActivity activity = mDecorActivity.getActivity();
        assertNotNull("test setup failed", activity.mLastContentInsets);
        assumeFalse(
                Insets.NONE.equals(
                        activity.mLastContentInsets.getInsetsIgnoringVisibility(
                                statusBars() | navigationBars())));
        assumeFalse(isCar() && remoteInsetsControllerControlsSystemBars());

        InstrumentationRegistry.getInstrumentation()
                .runOnMainSync(
                        () -> {
                            activity.mLayoutHappened = false;
                            activity.mMeasureHappened = false;
                            activity.getWindow().setSoftInputMode(softInputMode);
                            activity.getWindow().getInsetsController().hide(systemBars());
                        });
        activity.mZeroInsets.await(180, TimeUnit.SECONDS);
        InstrumentationRegistry.getInstrumentation()
                .runOnMainSync(
                        () -> {
                            if (expectRelayoutWhenInsetsChange) {
                                assertTrue(activity.mLayoutHappened);
                                assertTrue(activity.mMeasureHappened);
                            } else {
                                assertFalse(activity.mLayoutHappened);
                                assertFalse(activity.mMeasureHappened);
                            }
                        });
    }

    public static class TestActivity extends Activity {
        WindowInsets mLastContentInsets;
        final CountDownLatch mZeroInsets = new CountDownLatch(1);

        volatile boolean mLayoutHappened;
        volatile boolean mMeasureHappened;

        @Override
        protected void onCreate(@Nullable Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            getWindow().requestFeature(Window.FEATURE_NO_TITLE);
            View view =
                    new View(this) {
                        @Override
                        protected void onLayout(
                                boolean changed, int left, int top, int right, int bottom) {
                            super.onLayout(changed, left, top, right, bottom);
                            mLayoutHappened = true;
                        }

                        @Override
                        protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
                            super.onMeasure(widthMeasureSpec, heightMeasureSpec);
                            mMeasureHappened = true;
                        }
                    };
            view.setOnApplyWindowInsetsListener(
                    (v, wi) -> {
                        mLastContentInsets = wi;
                        if (wi.getInsets(systemBars()).equals(Insets.NONE)) {

                            // Make sure full traversal happens before counting down.
                            v.post(mZeroInsets::countDown);
                        }
                        return WindowInsets.CONSUMED;
                    });
            setContentView(view);

            getWindow().setDecorFitsSystemWindows(false);
            getWindow().getAttributes().layoutInDisplayCutoutMode =
                    LAYOUT_IN_DISPLAY_CUTOUT_MODE_ALWAYS;
        }
    }

    private static boolean remoteInsetsControllerControlsSystemBars() {
        return InstrumentationRegistry.getInstrumentation()
                .getTargetContext()
                .getResources()
                .getBoolean(android.R.bool.config_remoteInsetsControllerControlsSystemBars);
    }

    private boolean isCar() {
        PackageManager pm =
                InstrumentationRegistry.getInstrumentation().getContext().getPackageManager();
        return pm.hasSystemFeature(PackageManager.FEATURE_AUTOMOTIVE);
    }
}