/*
 * 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 com.android.settings.applications;

import android.app.Activity;
import android.content.Context;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageManager;
import android.os.Handler;
import android.os.Looper;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

import com.android.settings.R;
import com.android.settings.Settings;
import com.android.settings.TestConfig;
import com.android.settings.testutils.SettingsRobolectricTestRunner;
import com.android.settings.testutils.shadow.SettingsShadowResources;
import com.android.settings.testutils.shadow.SettingsShadowResources.SettingsShadowTheme;
import com.android.settings.testutils.shadow.ShadowDynamicIndexableContentMonitor;
import com.android.settings.testutils.shadow.ShadowEventLogWriter;
import com.android.settingslib.applications.ApplicationsState;
import com.android.settingslib.applications.ApplicationsState.Callbacks;
import com.android.settingslib.core.lifecycle.Lifecycle;

import java.util.ArrayList;

import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.Mock;
import org.mockito.MockitoAnnotations;
import org.robolectric.RuntimeEnvironment;
import org.robolectric.annotation.Config;
import org.robolectric.fakes.RoboMenuItem;
import org.robolectric.util.ReflectionHelpers;

import static com.google.common.truth.Truth.assertThat;
import static org.mockito.Matchers.any;
import static org.mockito.Matchers.anyInt;
import static org.mockito.Matchers.anyLong;
import static org.mockito.Matchers.eq;
import static org.mockito.Mockito.doNothing;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.never;
import static org.mockito.Mockito.spy;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;

/**
 * Tests for {@link ManageApplications}.
 */
@RunWith(SettingsRobolectricTestRunner.class)
// TODO: Consider making the shadow class set global using a robolectric.properties file.
@Config(manifest = TestConfig.MANIFEST_PATH,
        sdk = TestConfig.SDK_VERSION,
        shadows = {
                SettingsShadowResources.class,
                SettingsShadowTheme.class,
                ShadowDynamicIndexableContentMonitor.class,
                ShadowEventLogWriter.class
        })
public class ManageApplicationsTest {

    @Mock
    private ApplicationsState mState;
    @Mock
    private ApplicationsState.Session mSession;
    @Mock
    private Menu mMenu;
    private MenuItem mAppReset;
    private Looper mBgLooper;
    private ManageApplications mFragment;

    @Before
    public void setUp() {
        MockitoAnnotations.initMocks(this);
        mAppReset = new RoboMenuItem(R.id.reset_app_preferences);
        ReflectionHelpers.setStaticField(ApplicationsState.class, "sInstance", mState);
        when(mState.newSession(any())).thenReturn(mSession);
        mBgLooper = Looper.myLooper();
        when(mState.getBackgroundLooper()).thenReturn(mBgLooper);

        mFragment = new ManageApplications();
        ReflectionHelpers.setField(mFragment, "mLifecycle", new Lifecycle());
    }

    @Test
    public void launchFragment() {
        SettingsRobolectricTestRunner.startSettingsFragment(
                mFragment, Settings.ManageApplicationsActivity.class);
    }

    @Test
    public void updateDisableView_appDisabledUntilUsed_shouldSetDisabled() {
        final TextView view = mock(TextView.class);
        final ApplicationInfo info = new ApplicationInfo();
        info.flags = ApplicationInfo.FLAG_INSTALLED;
        info.enabled = true;
        info.enabledSetting = PackageManager.COMPONENT_ENABLED_STATE_DISABLED_UNTIL_USED;
        ManageApplications fragment = mock(ManageApplications.class);
        when(fragment.getActivity()).thenReturn(mock(Activity.class));
        final ManageApplications.ApplicationsAdapter adapter =
                new ManageApplications.ApplicationsAdapter(mState, fragment, 0);

        adapter.updateDisableView(view, info);

        verify(view).setText(R.string.disabled);
    }

    @Test
    public void updateMenu_mainListType_showAppReset() {
        setUpOptionMenus();
        ReflectionHelpers.setField(mFragment, "mListType", ManageApplications.LIST_TYPE_MAIN);
        ReflectionHelpers.setField(mFragment, "mOptionsMenu", mMenu);

        mFragment.updateOptionsMenu();
        assertThat(mMenu.findItem(R.id.reset_app_preferences).isVisible()).isTrue();
    }

    @Test
    public void updateMenu_batteryListType_hideAppReset() {
        setUpOptionMenus();
        ReflectionHelpers.setField(mFragment, "mListType", ManageApplications.LIST_TYPE_HIGH_POWER);
        ReflectionHelpers.setField(mFragment, "mOptionsMenu", mMenu);

        mFragment.updateOptionsMenu();
        assertThat(mMenu.findItem(R.id.reset_app_preferences).isVisible()).isFalse();
    }

    @Test
    public void onCreateView_shouldNotShowLoadingContainer() {
        final ManageApplications fragment = spy(new ManageApplications());
        ReflectionHelpers.setField(fragment, "mResetAppsHelper",
                mock(ResetAppsHelper.class));
        doNothing().when(fragment).createHeader();

        final LayoutInflater layoutInflater = mock(LayoutInflater.class);
        final View view = mock(View.class);
        final View loadingContainer = mock(View.class);
        when(layoutInflater.inflate(anyInt(), eq(null))).thenReturn(view);
        when(view.findViewById(R.id.loading_container)).thenReturn(loadingContainer);

        fragment.onCreateView(layoutInflater, mock(ViewGroup.class), null);

        verify(loadingContainer, never()).setVisibility(View.VISIBLE);
    }

    @Test
    public void updateLoading_appLoaded_shouldNotDelayCallToHandleLoadingContainer() {
        final ManageApplications fragment = mock(ManageApplications.class);
        ReflectionHelpers.setField(fragment, "mLoadingContainer", mock(View.class));
        ReflectionHelpers.setField(fragment, "mListContainer", mock(View.class));
        when(fragment.getActivity()).thenReturn(mock(Activity.class));
        final Runnable showLoadingContainerRunnable = mock(Runnable.class);
        final Handler handler = mock(Handler.class);
        final ManageApplications.ApplicationsAdapter adapter =
            spy(new ManageApplications.ApplicationsAdapter(mState, fragment, 0));
        ReflectionHelpers.setField(adapter, "mShowLoadingContainerRunnable",
            showLoadingContainerRunnable);
        ReflectionHelpers.setField(adapter, "mFgHandler", handler);

        // app loading completed
        ReflectionHelpers.setField(adapter, "mHasReceivedLoadEntries", true);
        final ArrayList<ApplicationsState.AppEntry> appList = new ArrayList<>();
        appList.add(mock(ApplicationsState.AppEntry.class));
        when(mSession.getAllApps()).thenReturn(appList);

        adapter.updateLoading();

        verify(handler, never()).postDelayed(eq(showLoadingContainerRunnable), anyLong());
    }

    @Test
    public void updateLoading_appNotLoaded_shouldDelayCallToHandleLoadingContainer() {
        final ManageApplications fragment = mock(ManageApplications.class);
        ReflectionHelpers.setField(fragment, "mLoadingContainer", mock(View.class));
        ReflectionHelpers.setField(fragment, "mListContainer", mock(View.class));
        when(fragment.getActivity()).thenReturn(mock(Activity.class));
        final Runnable showLoadingContainerRunnable = mock(Runnable.class);
        final Handler handler = mock(Handler.class);
        final ManageApplications.ApplicationsAdapter adapter =
            spy(new ManageApplications.ApplicationsAdapter(mState, fragment, 0));
        ReflectionHelpers.setField(adapter, "mShowLoadingContainerRunnable",
            showLoadingContainerRunnable);
        ReflectionHelpers.setField(adapter, "mFgHandler", handler);

        // app loading not yet completed
        ReflectionHelpers.setField(adapter, "mHasReceivedLoadEntries", false);

        adapter.updateLoading();

        verify(handler).postDelayed(eq(showLoadingContainerRunnable), anyLong());
    }

    @Test
    public void onRebuildComplete_shouldCancelDelayedRunnable() {
        final Context context = RuntimeEnvironment.application;
        final ManageApplications fragment = mock(ManageApplications.class);
        final View loadingContainer = mock(View.class);
        when(loadingContainer.getContext()).thenReturn(context);
        final View listContainer = mock(View.class);
        when(listContainer.getVisibility()).thenReturn(View.INVISIBLE);
        when(listContainer.getContext()).thenReturn(context);
        ReflectionHelpers.setField(fragment, "mLoadingContainer", loadingContainer);
        ReflectionHelpers.setField(fragment, "mListContainer", listContainer);
        when(fragment.getActivity()).thenReturn(mock(Activity.class));
        final Runnable showLoadingContainerRunnable = mock(Runnable.class);
        final Handler handler = mock(Handler.class);
        final ManageApplications.ApplicationsAdapter adapter =
            spy(new ManageApplications.ApplicationsAdapter(mState, fragment, 0));
        ReflectionHelpers.setField(adapter, "mShowLoadingContainerRunnable",
            showLoadingContainerRunnable);
        ReflectionHelpers.setField(adapter, "mFgHandler", handler);
        ReflectionHelpers.setField(adapter, "mFilterMode", -1);

        // app loading not yet completed
        ReflectionHelpers.setField(adapter, "mHasReceivedLoadEntries", false);
        adapter.updateLoading();

        // app loading completed
        ReflectionHelpers.setField(adapter, "mHasReceivedLoadEntries", true);
        final ArrayList<ApplicationsState.AppEntry> appList = new ArrayList<>();
        appList.add(mock(ApplicationsState.AppEntry.class));
        when(mSession.getAllApps()).thenReturn(appList);

        adapter.onRebuildComplete(null);

        verify(handler).removeCallbacks(showLoadingContainerRunnable);
    }

    private void setUpOptionMenus() {
        when(mMenu.findItem(anyInt())).thenAnswer(invocation -> {
            final Object[] args = invocation.getArguments();
            final int id = (int) args[0];
            if (id == mAppReset.getItemId()) {
                return mAppReset;
            }
            return new RoboMenuItem(id);
        });
    }
}