/*
 * 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 com.android.systemui.keyguard;

import static org.mockito.Mockito.doReturn;
import static org.mockito.Mockito.eq;
import static org.mockito.Mockito.never;
import static org.mockito.Mockito.verify;
import static org.mockito.Matchers.any;
import static org.mockito.Matchers.anyInt;
import static org.mockito.Matchers.argThat;

import android.app.Activity;
import android.app.ActivityManager;
import android.app.ActivityOptions;
import android.app.IActivityTaskManager;
import android.app.IApplicationThread;
import android.app.ProfilerInfo;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.os.IBinder;
import android.os.UserHandle;
import android.support.test.filters.SmallTest;
import android.support.test.runner.AndroidJUnit4;

import com.android.systemui.SysuiTestCase;
import com.android.systemui.shared.system.ActivityManagerWrapper;

import com.android.systemui.shared.system.TaskStackChangeListener;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.ArgumentCaptor;
import org.mockito.ArgumentMatcher;
import org.mockito.Mock;
import org.mockito.MockitoAnnotations;

/**
 * runtest systemui -c com.android.systemui.keyguard.WorkLockActivityControllerTest
 */
@SmallTest
@RunWith(AndroidJUnit4.class)
public class WorkLockActivityControllerTest extends SysuiTestCase {
    private static final int USER_ID = 333;
    private static final int TASK_ID = 444;

    private @Mock Context mContext;
    private @Mock ActivityManagerWrapper mActivityManager;
    private @Mock IActivityTaskManager mIActivityTaskManager;

    private WorkLockActivityController mController;
    private TaskStackChangeListener mTaskStackListener;

    @Before
    public void setUp() throws Exception {
        MockitoAnnotations.initMocks(this);

        // Set a package name to use for checking ComponentName well-formedness in tests.
        doReturn("com.example.test").when(mContext).getPackageName();

        // Construct controller. Save the TaskStackListener for injecting events.
        final ArgumentCaptor<TaskStackChangeListener> listenerCaptor =
                ArgumentCaptor.forClass(TaskStackChangeListener.class);
        mController = new WorkLockActivityController(mContext, mActivityManager,
                mIActivityTaskManager);

        verify(mActivityManager).registerTaskStackListener(listenerCaptor.capture());
        mTaskStackListener = listenerCaptor.getValue();
    }

    @Test
    public void testOverlayStartedWhenLocked() throws Exception {
        // When starting an activity succeeds,
        setActivityStartCode(TASK_ID, true /*taskOverlay*/, ActivityManager.START_SUCCESS);

        // And the controller receives a message saying the profile is locked,
        mTaskStackListener.onTaskProfileLocked(TASK_ID, USER_ID);

        // The overlay should start and the task the activity started in should not be removed.
        verifyStartActivity(TASK_ID, true /*taskOverlay*/);
        verify(mIActivityTaskManager, never()).removeTask(anyInt() /*taskId*/);
    }

    @Test
    public void testRemoveTaskOnFailureToStartOverlay() throws Exception {
        // When starting an activity fails,
        setActivityStartCode(TASK_ID, true /*taskOverlay*/, ActivityManager.START_CLASS_NOT_FOUND);

        // And the controller receives a message saying the profile is locked,
        mTaskStackListener.onTaskProfileLocked(TASK_ID, USER_ID);

        // The task the activity started in should be removed to prevent the locked task from
        // being shown.
        verifyStartActivity(TASK_ID, true /*taskOverlay*/);
        verify(mIActivityTaskManager).removeTask(TASK_ID);
    }

    // End of tests, start of helpers
    // ------------------------------

    private void setActivityStartCode(int taskId, boolean taskOverlay, int code) throws Exception {
        doReturn(code).when(mIActivityTaskManager).startActivityAsUser(
                eq((IApplicationThread) null),
                eq((String) null),
                any(Intent.class),
                eq((String) null),
                eq((IBinder) null),
                eq((String) null),
                anyInt(),
                anyInt(),
                eq((ProfilerInfo) null),
                argThat(hasOptions(taskId, taskOverlay)),
                eq(UserHandle.USER_CURRENT));
    }

    private void verifyStartActivity(int taskId, boolean taskOverlay) throws Exception {
        verify(mIActivityTaskManager).startActivityAsUser(
                eq((IApplicationThread) null),
                eq((String) null),
                any(Intent.class),
                eq((String) null),
                eq((IBinder) null),
                eq((String) null),
                anyInt(),
                anyInt(),
                eq((ProfilerInfo) null),
                argThat(hasOptions(taskId, taskOverlay)),
                eq(UserHandle.USER_CURRENT));
    }

    private static ArgumentMatcher<Intent> hasComponent(final Context context,
            final Class<? extends Activity> activityClass) {
        return new ArgumentMatcher<Intent>() {
            @Override
            public boolean matches(Intent intent) {
                return new ComponentName(context, activityClass).equals(intent.getComponent());
            }
        };
    }

    private static ArgumentMatcher<Bundle> hasOptions(final int taskId, final boolean overlay) {
        return new ArgumentMatcher<Bundle>() {
            @Override
            public boolean matches(Bundle item) {
                final ActivityOptions options = ActivityOptions.fromBundle(item);
                return (options.getLaunchTaskId() == taskId)
                        && (options.getTaskOverlay() == overlay);
            }
        };
    }
}