/*
 * Copyright (C) 2018 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 com.android.server.wm;

import static android.view.Display.DEFAULT_DISPLAY;

import static com.android.dx.mockito.inline.extended.ExtendedMockito.any;
import static com.android.dx.mockito.inline.extended.ExtendedMockito.anyInt;
import static com.android.dx.mockito.inline.extended.ExtendedMockito.doAnswer;
import static com.android.dx.mockito.inline.extended.ExtendedMockito.doReturn;
import static com.android.dx.mockito.inline.extended.ExtendedMockito.eq;
import static com.android.dx.mockito.inline.extended.ExtendedMockito.mock;
import static com.android.dx.mockito.inline.extended.ExtendedMockito.spyOn;
import static com.android.dx.mockito.inline.extended.ExtendedMockito.verify;
import static com.android.dx.mockito.inline.extended.ExtendedMockito.when;
import static com.android.server.wm.ActivityStack.ActivityState.INITIALIZING;
import static com.android.server.wm.ActivityStack.ActivityState.PAUSING;
import static com.android.server.wm.ActivityStack.ActivityState.RESUMED;
import static com.android.server.wm.ActivityStack.ActivityState.STOPPED;
import static com.android.server.wm.ActivityStack.REMOVE_TASK_MODE_MOVING;
import static com.android.server.wm.ActivityStack.STACK_VISIBILITY_INVISIBLE;
import static com.android.server.wm.ActivityStack.STACK_VISIBILITY_VISIBLE;
import static com.android.server.wm.ActivityStack.STACK_VISIBILITY_VISIBLE_BEHIND_TRANSLUCENT;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertTrue;

import android.app.ActivityOptions;
import android.app.servertransaction.ActivityConfigurationChangeItem;
import android.app.servertransaction.ClientTransaction;
import android.app.servertransaction.PauseActivityItem;
import android.content.pm.ActivityInfo;
import android.content.res.Configuration;
import android.graphics.Rect;
import android.platform.test.annotations.Presubmit;
import android.util.MergedConfiguration;
import android.util.MutableBoolean;

import androidx.test.filters.MediumTest;

import org.junit.Before;
import org.junit.Test;
import org.mockito.invocation.InvocationOnMock;

/**
 * Tests for the {@link ActivityRecord} class.
 *
 * Build/Install/Run:
 *  atest WmTests:ActivityRecordTests
 */
@MediumTest
@Presubmit
public class ActivityRecordTests extends ActivityTestsBase {
    private TestActivityStack mStack;
    private TaskRecord mTask;
    private ActivityRecord mActivity;

    @Before
    public void setUp() throws Exception {
        mStack = (TestActivityStack) new StackBuilder(mRootActivityContainer).build();
        mTask = mStack.getChildAt(0);
        mActivity = mTask.getTopActivity();

        doReturn(false).when(mService).isBooting();
        doReturn(true).when(mService).isBooted();
    }

    @Test
    public void testStackCleanupOnClearingTask() {
        mActivity.setTask(null);
        assertEquals(mStack.onActivityRemovedFromStackInvocationCount(), 1);
    }

    @Test
    public void testStackCleanupOnActivityRemoval() {
        mTask.removeActivity(mActivity);
        assertEquals(mStack.onActivityRemovedFromStackInvocationCount(),  1);
    }

    @Test
    public void testStackCleanupOnTaskRemoval() {
        mStack.removeTask(mTask, null /*reason*/, REMOVE_TASK_MODE_MOVING);
        // Stack should be gone on task removal.
        assertNull(mService.mRootActivityContainer.getStack(mStack.mStackId));
    }

    @Test
    public void testNoCleanupMovingActivityInSameStack() {
        final TaskRecord newTask = new TaskBuilder(mService.mStackSupervisor).setStack(mStack)
                .build();
        mActivity.reparent(newTask, 0, null /*reason*/);
        assertEquals(mStack.onActivityRemovedFromStackInvocationCount(), 0);
    }

    @Test
    public void testPausingWhenVisibleFromStopped() throws Exception {
        final MutableBoolean pauseFound = new MutableBoolean(false);
        doAnswer((InvocationOnMock invocationOnMock) -> {
            final ClientTransaction transaction = invocationOnMock.getArgument(0);
            if (transaction.getLifecycleStateRequest() instanceof PauseActivityItem) {
                pauseFound.value = true;
            }
            return null;
        }).when(mActivity.app.getThread()).scheduleTransaction(any());

        mActivity.setState(STOPPED, "testPausingWhenVisibleFromStopped");

        // The activity is in the focused stack so it should be resumed.
        mActivity.makeVisibleIfNeeded(null /* starting */, true /* reportToClient */);
        assertTrue(mActivity.isState(RESUMED));
        assertFalse(pauseFound.value);

        // Make the activity non focusable
        mActivity.setState(STOPPED, "testPausingWhenVisibleFromStopped");
        doReturn(false).when(mActivity).isFocusable();

        // If the activity is not focusable, it should move to paused.
        mActivity.makeVisibleIfNeeded(null /* starting */, true /* reportToClient */);
        assertTrue(mActivity.isState(PAUSING));
        assertTrue(pauseFound.value);

        // Make sure that the state does not change for current non-stopping states.
        mActivity.setState(INITIALIZING, "testPausingWhenVisibleFromStopped");
        doReturn(true).when(mActivity).isFocusable();

        mActivity.makeVisibleIfNeeded(null /* starting */, true /* reportToClient */);

        assertTrue(mActivity.isState(INITIALIZING));

        // Make sure the state does not change if we are not the current top activity.
        mActivity.setState(STOPPED, "testPausingWhenVisibleFromStopped behind");

        // Make sure that the state does not change when we have an activity becoming translucent
        final ActivityRecord topActivity = new ActivityBuilder(mService).setTask(mTask).build();
        mStack.mTranslucentActivityWaiting = topActivity;
        mActivity.makeVisibleIfNeeded(null /* starting */, true /* reportToClient */);

        assertTrue(mActivity.isState(STOPPED));
    }

    private void ensureActivityConfiguration() {
        mActivity.ensureActivityConfiguration(0 /* globalChanges */, false /* preserveWindow */);
    }

    @Test
    public void testCanBeLaunchedOnDisplay() {
        mService.mSupportsMultiWindow = true;
        final ActivityRecord activity = new ActivityBuilder(mService).build();

        // An activity can be launched on default display.
        assertTrue(activity.canBeLaunchedOnDisplay(DEFAULT_DISPLAY));
        // An activity cannot be launched on a non-existent display.
        assertFalse(activity.canBeLaunchedOnDisplay(DEFAULT_DISPLAY + 1));
    }

    @Test
    public void testsApplyOptionsLocked() {
        ActivityOptions activityOptions = ActivityOptions.makeBasic();

        // Set and apply options for ActivityRecord. Pending options should be cleared
        mActivity.updateOptionsLocked(activityOptions);
        mActivity.applyOptionsLocked();
        assertNull(mActivity.pendingOptions);

        // Set options for two ActivityRecords in same Task. Apply one ActivityRecord options.
        // Pending options should be cleared for both ActivityRecords
        ActivityRecord activity2 = new ActivityBuilder(mService).setTask(mTask).build();
        activity2.updateOptionsLocked(activityOptions);
        mActivity.updateOptionsLocked(activityOptions);
        mActivity.applyOptionsLocked();
        assertNull(mActivity.pendingOptions);
        assertNull(activity2.pendingOptions);

        // Set options for two ActivityRecords in separate Tasks. Apply one ActivityRecord options.
        // Pending options should be cleared for only ActivityRecord that was applied
        TaskRecord task2 = new TaskBuilder(mService.mStackSupervisor).setStack(mStack).build();
        activity2 = new ActivityBuilder(mService).setTask(task2).build();
        activity2.updateOptionsLocked(activityOptions);
        mActivity.updateOptionsLocked(activityOptions);
        mActivity.applyOptionsLocked();
        assertNull(mActivity.pendingOptions);
        assertNotNull(activity2.pendingOptions);
    }

    @Test
    public void testNewOverrideConfigurationIncrementsSeq() {
        final Configuration newConfig = new Configuration();

        final int prevSeq = mActivity.getMergedOverrideConfiguration().seq;
        mActivity.onRequestedOverrideConfigurationChanged(newConfig);
        assertEquals(prevSeq + 1, mActivity.getMergedOverrideConfiguration().seq);
    }

    @Test
    public void testNewParentConfigurationIncrementsSeq() {
        final Configuration newConfig = new Configuration(
                mTask.getRequestedOverrideConfiguration());
        newConfig.orientation = newConfig.orientation == Configuration.ORIENTATION_PORTRAIT
                ? Configuration.ORIENTATION_LANDSCAPE : Configuration.ORIENTATION_PORTRAIT;

        final int prevSeq = mActivity.getMergedOverrideConfiguration().seq;
        mTask.onRequestedOverrideConfigurationChanged(newConfig);
        assertEquals(prevSeq + 1, mActivity.getMergedOverrideConfiguration().seq);
    }

    @Test
    public void testNotifiesSeqIncrementToAppToken() {
        final Configuration appWindowTokenRequestedOrientation = mock(Configuration.class);
        mActivity.mAppWindowToken = mock(AppWindowToken.class);
        doReturn(appWindowTokenRequestedOrientation).when(mActivity.mAppWindowToken)
                .getRequestedOverrideConfiguration();

        final Configuration newConfig = new Configuration();
        newConfig.orientation = Configuration.ORIENTATION_PORTRAIT;

        final int prevSeq = mActivity.getMergedOverrideConfiguration().seq;
        mActivity.onRequestedOverrideConfigurationChanged(newConfig);
        assertEquals(prevSeq + 1, appWindowTokenRequestedOrientation.seq);
        verify(mActivity.mAppWindowToken).onMergedOverrideConfigurationChanged();
    }

    @Test
    public void testSetsRelaunchReason_NotDragResizing() {
        mActivity.setState(ActivityStack.ActivityState.RESUMED, "Testing");

        mTask.onRequestedOverrideConfigurationChanged(mTask.getConfiguration());
        mActivity.setLastReportedConfiguration(new MergedConfiguration(new Configuration(),
                mActivity.getConfiguration()));

        mActivity.info.configChanges &= ~ActivityInfo.CONFIG_ORIENTATION;
        final Configuration newConfig = new Configuration(mTask.getConfiguration());
        newConfig.orientation = newConfig.orientation == Configuration.ORIENTATION_PORTRAIT
                ? Configuration.ORIENTATION_LANDSCAPE : Configuration.ORIENTATION_PORTRAIT;
        mTask.onRequestedOverrideConfigurationChanged(newConfig);

        mActivity.mRelaunchReason = ActivityTaskManagerService.RELAUNCH_REASON_NONE;

        ensureActivityConfiguration();

        assertEquals(ActivityTaskManagerService.RELAUNCH_REASON_WINDOWING_MODE_RESIZE,
                mActivity.mRelaunchReason);
    }

    @Test
    public void testSetsRelaunchReason_DragResizing() {
        mActivity.setState(ActivityStack.ActivityState.RESUMED, "Testing");

        mTask.onRequestedOverrideConfigurationChanged(mTask.getConfiguration());
        mActivity.setLastReportedConfiguration(new MergedConfiguration(new Configuration(),
                mActivity.getConfiguration()));

        mActivity.info.configChanges &= ~ActivityInfo.CONFIG_ORIENTATION;
        final Configuration newConfig = new Configuration(mTask.getConfiguration());
        newConfig.orientation = newConfig.orientation == Configuration.ORIENTATION_PORTRAIT
                ? Configuration.ORIENTATION_LANDSCAPE : Configuration.ORIENTATION_PORTRAIT;
        mTask.onRequestedOverrideConfigurationChanged(newConfig);

        doReturn(true).when(mTask.getTask()).isDragResizing();

        mActivity.mRelaunchReason = ActivityTaskManagerService.RELAUNCH_REASON_NONE;

        ensureActivityConfiguration();

        assertEquals(ActivityTaskManagerService.RELAUNCH_REASON_FREE_RESIZE,
                mActivity.mRelaunchReason);
    }

    @Test
    public void testSetsRelaunchReason_NonResizeConfigChanges() {
        mActivity.setState(ActivityStack.ActivityState.RESUMED, "Testing");

        mTask.onRequestedOverrideConfigurationChanged(mTask.getConfiguration());
        mActivity.setLastReportedConfiguration(new MergedConfiguration(new Configuration(),
                mActivity.getConfiguration()));

        mActivity.info.configChanges &= ~ActivityInfo.CONFIG_FONT_SCALE;
        final Configuration newConfig = new Configuration(mTask.getConfiguration());
        newConfig.fontScale = 5;
        mTask.onRequestedOverrideConfigurationChanged(newConfig);

        mActivity.mRelaunchReason =
                ActivityTaskManagerService.RELAUNCH_REASON_WINDOWING_MODE_RESIZE;

        ensureActivityConfiguration();

        assertEquals(ActivityTaskManagerService.RELAUNCH_REASON_NONE,
                mActivity.mRelaunchReason);
    }

    @Test
    public void testSetRequestedOrientationUpdatesConfiguration() throws Exception {
        mActivity.setState(ActivityStack.ActivityState.RESUMED, "Testing");

        mTask.onRequestedOverrideConfigurationChanged(mTask.getConfiguration());
        mActivity.setLastReportedConfiguration(new MergedConfiguration(new Configuration(),
                mActivity.getConfiguration()));

        mActivity.info.configChanges |= ActivityInfo.CONFIG_ORIENTATION;
        final Configuration newConfig = new Configuration(mActivity.getConfiguration());
        newConfig.orientation = newConfig.orientation == Configuration.ORIENTATION_PORTRAIT
                ? Configuration.ORIENTATION_LANDSCAPE
                : Configuration.ORIENTATION_PORTRAIT;

        // Mimic the behavior that display doesn't handle app's requested orientation.
        doAnswer(invocation -> {
            mTask.onConfigurationChanged(newConfig);
            return null;
        }).when(mActivity.mAppWindowToken).setOrientation(anyInt(), any(), any());

        final int requestedOrientation;
        switch (newConfig.orientation) {
            case Configuration.ORIENTATION_LANDSCAPE:
                requestedOrientation = ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE;
                break;
            case Configuration.ORIENTATION_PORTRAIT:
                requestedOrientation = ActivityInfo.SCREEN_ORIENTATION_PORTRAIT;
                break;
            default:
                throw new IllegalStateException("Orientation in new config should be either"
                        + "landscape or portrait.");
        }
        mActivity.setRequestedOrientation(requestedOrientation);

        final ActivityConfigurationChangeItem expected =
                ActivityConfigurationChangeItem.obtain(newConfig);
        verify(mService.getLifecycleManager()).scheduleTransaction(eq(mActivity.app.getThread()),
                eq(mActivity.appToken), eq(expected));
    }

    @Test
    public void testShouldMakeActive_deferredResume() {
        mActivity.setState(ActivityStack.ActivityState.STOPPED, "Testing");

        mSupervisor.beginDeferResume();
        assertEquals(false, mActivity.shouldMakeActive(null /* activeActivity */));

        mSupervisor.endDeferResume();
        assertEquals(true, mActivity.shouldMakeActive(null /* activeActivity */));
    }

    @Test
    public void testShouldResume_stackVisibility() {
        mActivity.setState(ActivityStack.ActivityState.STOPPED, "Testing");
        spyOn(mStack);

        doReturn(STACK_VISIBILITY_VISIBLE).when(mStack).getVisibility(null);
        assertEquals(true, mActivity.shouldResumeActivity(null /* activeActivity */));

        doReturn(STACK_VISIBILITY_VISIBLE_BEHIND_TRANSLUCENT).when(mStack).getVisibility(null);
        assertEquals(false, mActivity.shouldResumeActivity(null /* activeActivity */));

        doReturn(STACK_VISIBILITY_INVISIBLE).when(mStack).getVisibility(null);
        assertEquals(false, mActivity.shouldResumeActivity(null /* activeActivity */));
    }

    @Test
    public void testPushConfigurationWhenLaunchTaskBehind() throws Exception {
        mActivity.setState(ActivityStack.ActivityState.STOPPED, "Testing");

        final TestActivityStack stack = (TestActivityStack) new StackBuilder(mRootActivityContainer)
                .build();
        try {
            stack.setIsTranslucent(false);
            assertFalse(mStack.shouldBeVisible(null /* starting */));

            mTask.onRequestedOverrideConfigurationChanged(mTask.getConfiguration());
            mActivity.setLastReportedConfiguration(new MergedConfiguration(new Configuration(),
                    mActivity.getConfiguration()));

            mActivity.mLaunchTaskBehind = true;
            mActivity.info.configChanges |= ActivityInfo.CONFIG_ORIENTATION;
            final Configuration newConfig = new Configuration(mActivity.getConfiguration());
            newConfig.orientation = newConfig.orientation == Configuration.ORIENTATION_PORTRAIT
                    ? Configuration.ORIENTATION_LANDSCAPE
                    : Configuration.ORIENTATION_PORTRAIT;

            mTask.onConfigurationChanged(newConfig);

            mActivity.ensureActivityConfiguration(0 /* globalChanges */,
                    false /* preserveWindow */, true /* ignoreStopState */);

            final ActivityConfigurationChangeItem expected =
                    ActivityConfigurationChangeItem.obtain(newConfig);
            verify(mService.getLifecycleManager()).scheduleTransaction(
                    eq(mActivity.app.getThread()), eq(mActivity.appToken), eq(expected));
        } finally {
            stack.getDisplay().removeChild(stack);
        }
    }

    @Test
    public void testFixedScreenConfigurationWhenMovingToDisplay() {
        // Initialize different bounds on a new display.
        final ActivityDisplay newDisplay = addNewActivityDisplayAt(ActivityDisplay.POSITION_TOP);
        newDisplay.setBounds(0, 0, 1000, 2000);
        newDisplay.getConfiguration().densityDpi = 300;

        mTask.getWindowConfiguration().setAppBounds(mStack.getDisplay().getBounds());
        mTask.getConfiguration().densityDpi = 200;
        when(mActivity.mAppWindowToken.getOrientationIgnoreVisibility()).thenReturn(
                ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED);
        mActivity.info.resizeMode = ActivityInfo.RESIZE_MODE_UNRESIZEABLE;
        mActivity.info.maxAspectRatio = 1.5f;
        ensureActivityConfiguration();
        final Rect originalBounds = new Rect(mActivity.getBounds());
        final int originalDpi = mActivity.getConfiguration().densityDpi;

        // Move the non-resizable activity to the new display.
        mStack.reparent(newDisplay, true /* onTop */, false /* displayRemoved */);
        ensureActivityConfiguration();

        assertEquals(originalBounds, mActivity.getBounds());
        assertEquals(originalDpi, mActivity.getConfiguration().densityDpi);
    }

    @Test
    public void testFixedScreenBoundsWhenDisplaySizeChanged() {
        when(mActivity.mAppWindowToken.getOrientationIgnoreVisibility()).thenReturn(
                ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
        mTask.getWindowConfiguration().setAppBounds(mStack.getDisplay().getBounds());
        mActivity.info.screenOrientation = ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE;
        mActivity.info.resizeMode = ActivityInfo.RESIZE_MODE_UNRESIZEABLE;
        ensureActivityConfiguration();
        final Rect originalBounds = new Rect(mActivity.getBounds());

        // Change the size of current display.
        mStack.getDisplay().setBounds(0, 0, 1000, 2000);
        ensureActivityConfiguration();

        assertEquals(originalBounds, mActivity.getBounds());
    }
}