/*
 * 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.settings.datausage;

import static com.google.common.truth.Truth.assertThat;

import static org.junit.Assert.assertTrue;
import static org.mockito.Mockito.RETURNS_DEEP_STUBS;
import static org.mockito.Mockito.any;
import static org.mockito.Mockito.anyBoolean;
import static org.mockito.Mockito.anyInt;
import static org.mockito.Mockito.anyString;
import static org.mockito.Mockito.doNothing;
import static org.mockito.Mockito.doReturn;
import static org.mockito.Mockito.eq;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.spy;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;

import android.content.Context;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageManager;
import android.content.pm.PackageManager.NameNotFoundException;
import android.net.NetworkPolicyManager;
import android.net.NetworkTemplate;
import android.os.Bundle;
import android.os.Process;
import android.telephony.SubscriptionManager;
import android.util.ArraySet;

import androidx.fragment.app.FragmentActivity;
import androidx.preference.PreferenceManager;
import androidx.preference.PreferenceScreen;
import androidx.recyclerview.widget.RecyclerView;

import com.android.settings.applications.AppInfoBase;
import com.android.settings.testutils.FakeFeatureFactory;
import com.android.settings.testutils.shadow.ShadowDataUsageUtils;
import com.android.settings.testutils.shadow.ShadowEntityHeaderController;
import com.android.settings.testutils.shadow.ShadowFragment;
import com.android.settings.testutils.shadow.ShadowRestrictedLockUtilsInternal;
import com.android.settings.widget.EntityHeaderController;
import com.android.settingslib.AppItem;
import com.android.settingslib.RestrictedLockUtils.EnforcedAdmin;
import com.android.settingslib.RestrictedSwitchPreference;
import com.android.settingslib.core.AbstractPreferenceController;
import com.android.settingslib.net.UidDetail;
import com.android.settingslib.net.UidDetailProvider;

import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.Answers;
import org.mockito.Mock;
import org.mockito.MockitoAnnotations;
import org.robolectric.Robolectric;
import org.robolectric.RobolectricTestRunner;
import org.robolectric.RuntimeEnvironment;
import org.robolectric.annotation.Config;
import org.robolectric.shadows.ShadowSubscriptionManager;
import org.robolectric.util.ReflectionHelpers;

import java.util.List;

@RunWith(RobolectricTestRunner.class)
@Config(shadows = {ShadowEntityHeaderController.class, ShadowRestrictedLockUtilsInternal.class})
public class AppDataUsageTest {

    @Mock(answer = Answers.RETURNS_DEEP_STUBS)
    private EntityHeaderController mHeaderController;
    @Mock
    private PackageManager mPackageManager;

    private AppDataUsage mFragment;

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

        ShadowEntityHeaderController.setUseMock(mHeaderController);
        when(mHeaderController.setUid(anyInt())).thenReturn(mHeaderController);
    }

    @After
    public void tearDown() {
        ShadowEntityHeaderController.reset();
    }

    @Test
    @Config(shadows = ShadowFragment.class)
    public void onCreate_appUid_shouldGetAppLabelFromAppInfo() throws NameNotFoundException {
        mFragment = spy(new TestFragment());
        final FragmentActivity activity = spy(Robolectric.setupActivity(FragmentActivity.class));
        doReturn(mPackageManager).when(activity).getPackageManager();
        doReturn(activity).when(mFragment).getActivity();
        doReturn(RuntimeEnvironment.application).when(mFragment).getContext();
        ReflectionHelpers.setField(mFragment, "mDashboardFeatureProvider",
                FakeFeatureFactory.setupForTest().dashboardFeatureProvider);
        final String packageName = "testPackage";
        final int uid = (Process.FIRST_APPLICATION_UID + Process.LAST_APPLICATION_UID) / 2;
        doReturn(new String[]{packageName}).when(mPackageManager).getPackagesForUid(uid);
        final String label = "testLabel";
        final AppItem appItem = new AppItem(uid);
        appItem.uids.put(uid, true);
        final ApplicationInfo info = spy(new ApplicationInfo());
        doReturn(label).when(info).loadLabel(mPackageManager);
        when(mPackageManager.getApplicationInfoAsUser(
                eq(packageName), anyInt() /* flags */, anyInt() /* userId */)).thenReturn(info);
        final Bundle args = new Bundle();
        args.putParcelable(AppDataUsage.ARG_APP_ITEM, appItem);
        args.putInt(AppInfoBase.ARG_PACKAGE_UID, uid);
        mFragment.setArguments(args);

        mFragment.onCreate(Bundle.EMPTY);

        assertThat(mFragment.mLabel).isEqualTo(label);
    }

    @Test
    @Config(shadows = ShadowFragment.class)
    public void onCreate_notAppUid_shouldGetAppLabelFromUidDetailProvider() {
        mFragment = spy(new TestFragment());
        ReflectionHelpers.setField(mFragment, "mDashboardFeatureProvider",
                FakeFeatureFactory.setupForTest().dashboardFeatureProvider);
        doReturn(Robolectric.setupActivity(FragmentActivity.class)).when(mFragment).getActivity();
        doReturn(RuntimeEnvironment.application).when(mFragment).getContext();
        final UidDetailProvider uidDetailProvider = mock(UidDetailProvider.class);
        doReturn(uidDetailProvider).when(mFragment).getUidDetailProvider();
        final String label = "testLabel";
        final int uid = Process.SYSTEM_UID;
        final UidDetail uidDetail = new UidDetail();
        uidDetail.label = label;
        when(uidDetailProvider.getUidDetail(eq(uid), anyBoolean() /* blocking */)).
                thenReturn(uidDetail);
        final AppItem appItem = new AppItem(uid);
        appItem.uids.put(uid, true);
        final Bundle args = new Bundle();
        args.putParcelable(AppDataUsage.ARG_APP_ITEM, appItem);
        args.putInt(AppInfoBase.ARG_PACKAGE_UID, uid);
        mFragment.setArguments(args);

        mFragment.onCreate(Bundle.EMPTY);

        assertThat(mFragment.mLabel).isEqualTo(label);
    }

    @Test
    public void bindAppHeader_allWorkApps_shouldNotShowAppInfoLink() {
        mFragment = spy(new TestFragment());

        when(mFragment.getPreferenceManager())
                .thenReturn(mock(PreferenceManager.class, RETURNS_DEEP_STUBS));
        doReturn(mock(PreferenceScreen.class)).when(mFragment).getPreferenceScreen();
        ReflectionHelpers.setField(mFragment, "mAppItem", mock(AppItem.class));

        mFragment.addEntityHeader();

        verify(mHeaderController).setHasAppInfoLink(false);
    }

    @Test
    public void bindAppHeader_workApp_shouldSetWorkAppUid()
            throws PackageManager.NameNotFoundException {
        final int fakeUserId = 100;

        mFragment = spy(new TestFragment());
        final ArraySet<String> packages = new ArraySet<>();
        packages.add("pkg");
        final AppItem appItem = new AppItem(123456789);

        ReflectionHelpers.setField(mFragment, "mPackageManager", mPackageManager);
        ReflectionHelpers.setField(mFragment, "mAppItem", appItem);
        ReflectionHelpers.setField(mFragment, "mPackages", packages);

        when(mPackageManager.getPackageUidAsUser(anyString(), anyInt()))
                .thenReturn(fakeUserId);

        when(mHeaderController.setHasAppInfoLink(anyBoolean())).thenReturn(mHeaderController);

        when(mFragment.getPreferenceManager())
                .thenReturn(mock(PreferenceManager.class, RETURNS_DEEP_STUBS));
        doReturn(mock(PreferenceScreen.class)).when(mFragment).getPreferenceScreen();

        mFragment.addEntityHeader();

        verify(mHeaderController).setHasAppInfoLink(true);
        verify(mHeaderController).setUid(fakeUserId);
    }

    @Test
    public void changePreference_backgroundData_shouldUpdateUI() {
        mFragment = spy(new TestFragment());
        final AppItem appItem = new AppItem(123456789);
        final RestrictedSwitchPreference pref = mock(RestrictedSwitchPreference.class);
        final DataSaverBackend dataSaverBackend = mock(DataSaverBackend.class);
        ReflectionHelpers.setField(mFragment, "mAppItem", appItem);
        ReflectionHelpers.setField(mFragment, "mRestrictBackground", pref);
        ReflectionHelpers.setField(mFragment, "mDataSaverBackend", dataSaverBackend);

        doNothing().when(mFragment).updatePrefs();

        mFragment.onPreferenceChange(pref, true /* value */);

        verify(mFragment).updatePrefs();
    }

    @Test
    public void updatePrefs_restrictedByAdmin_shouldDisablePreference() {
        mFragment = spy(new TestFragment());
        final int testUid = 123123;
        final AppItem appItem = new AppItem(testUid);
        final RestrictedSwitchPreference restrictBackgroundPref
                = mock(RestrictedSwitchPreference.class);
        final RestrictedSwitchPreference unrestrictedDataPref
                = mock(RestrictedSwitchPreference.class);
        final DataSaverBackend dataSaverBackend = mock(DataSaverBackend.class);
        final NetworkPolicyManager networkPolicyManager = mock(NetworkPolicyManager.class);
        ReflectionHelpers.setField(mFragment, "mAppItem", appItem);
        ReflectionHelpers.setField(mFragment, "mRestrictBackground", restrictBackgroundPref);
        ReflectionHelpers.setField(mFragment, "mUnrestrictedData", unrestrictedDataPref);
        ReflectionHelpers.setField(mFragment, "mDataSaverBackend", dataSaverBackend);
        ReflectionHelpers.setField(mFragment.services, "mPolicyManager", networkPolicyManager);
        ReflectionHelpers.setField(mFragment, "mContext", RuntimeEnvironment.application);
        when(mFragment.getListView()).thenReturn(mock(RecyclerView.class));

        ShadowRestrictedLockUtilsInternal.setRestricted(true);
        doReturn(NetworkPolicyManager.POLICY_NONE).when(networkPolicyManager)
                .getUidPolicy(testUid);

        mFragment.updatePrefs();

        verify(restrictBackgroundPref).setDisabledByAdmin(any(EnforcedAdmin.class));
        verify(unrestrictedDataPref).setDisabledByAdmin(any(EnforcedAdmin.class));
    }

    @Test
    @Config(shadows = {ShadowDataUsageUtils.class, ShadowSubscriptionManager.class,
            ShadowFragment.class})
    public void onCreate_noNetworkTemplateAndInvalidDataSubscription_shouldUseWifiTemplate() {
        ShadowDataUsageUtils.IS_MOBILE_DATA_SUPPORTED = true;
        ShadowDataUsageUtils.IS_WIFI_SUPPORTED = true;
        ShadowSubscriptionManager.setDefaultDataSubscriptionId(
                SubscriptionManager.INVALID_SUBSCRIPTION_ID);
        mFragment = spy(new TestFragment());
        doReturn(Robolectric.setupActivity(FragmentActivity.class)).when(mFragment).getActivity();
        doReturn(RuntimeEnvironment.application).when(mFragment).getContext();
        final UidDetailProvider uidDetailProvider = mock(UidDetailProvider.class);
        doReturn(uidDetailProvider).when(mFragment).getUidDetailProvider();
        doReturn(new UidDetail()).when(uidDetailProvider).getUidDetail(anyInt(), anyBoolean());

        ReflectionHelpers.setField(mFragment, "mDashboardFeatureProvider",
                FakeFeatureFactory.setupForTest().dashboardFeatureProvider);
        final Bundle args = new Bundle();
        args.putInt(AppInfoBase.ARG_PACKAGE_UID, 123123);
        mFragment.setArguments(args);

        mFragment.onCreate(Bundle.EMPTY);

        assertThat(mFragment.mTemplate.getMatchRule())
                .isEqualTo(NetworkTemplate.MATCH_WIFI);
        assertTrue(mFragment.mTemplate.getSubscriberIds().isEmpty());
        assertTrue(mFragment.mTemplate.getWifiNetworkKeys().isEmpty());
    }

    private static class TestFragment extends AppDataUsage {
        @Override
        protected <T extends AbstractPreferenceController> T use(Class<T> clazz) {
            return mock(clazz);
        }

        @Override
        void initCycle(List<Integer> uidList) {
        }

        @Override
        public boolean isSimHardwareVisible(Context context) {
            return true;
        }
    }
}