/*
 * 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.notification.app;

import static android.app.NotificationChannel.DEFAULT_CHANNEL_ID;
import static android.app.NotificationManager.IMPORTANCE_HIGH;
import static android.app.NotificationManager.IMPORTANCE_LOW;
import static android.app.NotificationManager.IMPORTANCE_NONE;
import static android.app.NotificationManager.IMPORTANCE_UNSPECIFIED;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import static org.mockito.ArgumentMatchers.any;
import static org.mockito.ArgumentMatchers.anyBoolean;
import static org.mockito.ArgumentMatchers.anyInt;
import static org.mockito.ArgumentMatchers.anyString;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.spy;
import static org.mockito.Mockito.times;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;

import android.app.NotificationChannel;
import android.app.NotificationChannelGroup;
import android.app.NotificationManager;
import android.content.Context;
import android.os.UserManager;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.LinearLayout;

import androidx.preference.PreferenceViewHolder;

import com.android.settings.notification.NotificationBackend;
import com.android.settings.widget.SettingsMainSwitchPreference;
import com.android.settingslib.testutils.shadow.ShadowInteractionJankMonitor;

import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.Mock;
import org.mockito.MockitoAnnotations;
import org.robolectric.RobolectricTestRunner;
import org.robolectric.RuntimeEnvironment;
import org.robolectric.annotation.Config;
import org.robolectric.shadows.ShadowApplication;

import java.util.ArrayList;

@RunWith(RobolectricTestRunner.class)
@Config(shadows = {ShadowInteractionJankMonitor.class})
public class BlockPreferenceControllerTest {

    private Context mContext;
    @Mock
    private NotificationBackend mBackend;
    @Mock
    private NotificationManager mNm;
    @Mock
    private UserManager mUm;

    @Mock
    private NotificationSettings.DependentFieldListener mDependentFieldListener;

    private BlockPreferenceController mController;
    private SettingsMainSwitchPreference mPreference;

    @Before
    public void setUp() {
        MockitoAnnotations.initMocks(this);
        ShadowApplication shadowApplication = ShadowApplication.getInstance();
        shadowApplication.setSystemService(Context.NOTIFICATION_SERVICE, mNm);
        shadowApplication.setSystemService(Context.USER_SERVICE, mUm);
        mContext = RuntimeEnvironment.application;
        mController = spy(
                new BlockPreferenceController(mContext, mDependentFieldListener, mBackend));
        mPreference = new SettingsMainSwitchPreference(mContext);

        final LayoutInflater inflater = LayoutInflater.from(mContext);
        final View view = inflater.inflate(mPreference.getLayoutResource(),
                new LinearLayout(mContext), false);
        final PreferenceViewHolder holder = PreferenceViewHolder.createInstanceForTests(view);
        mPreference.onBindViewHolder(holder);
    }

    @Test
    public void testNoCrashIfNoOnResume() {
        mController.isAvailable();
        mController.onCheckedChanged(null, false);
    }

    @Test
    public void testIsAvailable_notIfNull() {
        mController.onResume(null, null, null, null, null, null, null);
        assertFalse(mController.isAvailable());
    }

    @Test
    public void testIsAvailable_channelNotBlockable() {
        NotificationBackend.AppRow appRow = new NotificationBackend.AppRow();
        appRow.systemApp = true;
        NotificationChannel channel = mock(NotificationChannel.class);
        when(channel.getImportance()).thenReturn(IMPORTANCE_HIGH);
        mController.onResume(appRow, channel, null, null, null, null, null);
        assertTrue(mController.isAvailable());
    }

    @Test
    public void testIsAvailable_channelNonDefault() {
        NotificationBackend.AppRow appRow = new NotificationBackend.AppRow();
        appRow.systemApp = true;
        NotificationChannel channel = mock(NotificationChannel.class);
        when(channel.getImportance()).thenReturn(IMPORTANCE_HIGH);
        mController.onResume(appRow, channel, null, null, null, null, null);
        assertTrue(mController.isAvailable());
    }

    @Test
    public void testIsAvailable_ifChannelDefault() {
        NotificationBackend.AppRow appRow = new NotificationBackend.AppRow();
        NotificationChannel channel = mock(NotificationChannel.class);
        when(channel.getImportance()).thenReturn(IMPORTANCE_HIGH);
        when(channel.getId()).thenReturn(DEFAULT_CHANNEL_ID);
        mController.onResume(appRow, channel, null, null, null, null, null);
        assertTrue(mController.isAvailable());
    }

    @Test
    public void testIsAvailable_GroupNotBlockable() {
        NotificationBackend.AppRow appRow = new NotificationBackend.AppRow();
        appRow.systemApp = true;
        mController.onResume(appRow, null, mock(NotificationChannelGroup.class), null, null, null,
                null);
        assertTrue(mController.isAvailable());
    }

    @Test
    public void testIsAvailable_AppNotBlockable() {
        NotificationBackend.AppRow appRow = new NotificationBackend.AppRow();
        appRow.systemApp = true;
        mController.onResume(appRow, null, null, null, null, null, null);
        assertTrue(mController.isAvailable());
    }

    @Test
    public void testIsAvailable_systemApp() {
        NotificationBackend.AppRow appRow = new NotificationBackend.AppRow();
        appRow.systemApp = true;
        NotificationChannel channel = mock(NotificationChannel.class);
        when(channel.getImportance()).thenReturn(IMPORTANCE_NONE);
        mController.onResume(appRow, channel, null, null, null, null, null);
        assertTrue(mController.isAvailable());
    }

    @Test
    public void testIsAvailable_nonSystemApp_noFilter() {
        NotificationBackend.AppRow appRow = new NotificationBackend.AppRow();
        appRow.systemApp = false;
        NotificationChannel channel = mock(NotificationChannel.class);
        when(channel.getImportance()).thenReturn(IMPORTANCE_HIGH);
        mController.onResume(appRow, channel, null, null, null, null, null);
        assertTrue(mController.isAvailable());
    }

    @Test
    public void testIsAvailable_filteredOut() {
        NotificationBackend.AppRow appRow = new NotificationBackend.AppRow();
        appRow.systemApp = false;
        NotificationChannel channel = mock(NotificationChannel.class);
        when(channel.getImportance()).thenReturn(IMPORTANCE_HIGH);
        ArrayList<String> filter = new ArrayList<>();
        filter.add("no");
        mController.onResume(appRow, channel, null, null, null, null, filter);
        assertFalse(mController.isAvailable());
    }

    @Test
    public void testIsAvailable_filteredIn() {
        NotificationBackend.AppRow appRow = new NotificationBackend.AppRow();
        appRow.systemApp = false;
        NotificationChannel channel = mock(NotificationChannel.class);
        when(channel.getImportance()).thenReturn(IMPORTANCE_HIGH);
        ArrayList<String> filter = new ArrayList<>();
        filter.add(NotificationChannel.EDIT_IMPORTANCE);
        mController.onResume(appRow, channel, null, null, null, null, filter);
        assertTrue(mController.isAvailable());
    }

    @Test
    public void testIsEnabled_cannotBlockAppOrGroupOrChannel() {
        mController.setOverrideCanBlock(false);
        NotificationBackend.AppRow appRow = new NotificationBackend.AppRow();
        mController.onResume(appRow, null, null, null, null, null, null);
        mController.updateState(mPreference);
        assertFalse(mPreference.getSwitchBar().isEnabled());
    }

    @Test
    public void testIsEnabled_importanceLocked_app() {
        mController.setOverrideCanConfigure(false);
        NotificationBackend.AppRow appRow = new NotificationBackend.AppRow();
        mController.onResume(appRow, null, null, null, null, null, null);
        mController.updateState(mPreference);
        assertFalse(mPreference.getSwitchBar().isEnabled());
    }

    @Test
    public void testIsEnabled_importanceLocked_group() {
        mController.setOverrideCanConfigure(false);
        NotificationBackend.AppRow appRow = new NotificationBackend.AppRow();
        mController.onResume(
                appRow, null, new NotificationChannelGroup("a", "a"), null, null, null, null);
        mController.updateState(mPreference);
        assertFalse(mPreference.getSwitchBar().isEnabled());
    }

    @Test
    public void testIsEnabled_importanceLocked_channel() {
        mController.setOverrideCanConfigure(false);
        NotificationBackend.AppRow appRow = new NotificationBackend.AppRow();
        mController.onResume(appRow, new NotificationChannel("a", "a", IMPORTANCE_LOW), null, null,
                null, null, null);
        mController.updateState(mPreference);
        assertFalse(mPreference.getSwitchBar().isEnabled());
    }

    @Test
    public void testIsEnabled_channel() {
        NotificationBackend.AppRow appRow = new NotificationBackend.AppRow();
        NotificationChannel channel = mock(NotificationChannel.class);
        when(channel.getImportance()).thenReturn(IMPORTANCE_HIGH);
        mController.onResume(appRow, channel, null, null, null, null, null);

        mController.updateState(mPreference);

        assertTrue(mPreference.getSwitchBar().isEnabled());
    }

    @Test
    public void testIsEnabled_app() {
        NotificationBackend.AppRow appRow = new NotificationBackend.AppRow();
        mController.onResume(appRow, null, null, null, null, null, null);

        mController.updateState(mPreference);

        assertTrue(mPreference.getSwitchBar().isEnabled());
    }

    @Test
    public void testUpdateState_app() {
        NotificationBackend.AppRow appRow = new NotificationBackend.AppRow();
        appRow.banned = true;
        mController.onResume(appRow, null, null, null, null, null, null);
        mController.updateState(mPreference);

        assertFalse(mPreference.isChecked());

        appRow.banned = false;
        mController.onResume(appRow, null, null, null, null, null, null);
        mController.updateState(mPreference);

        assertTrue(mPreference.isChecked());
    }

    @Test
    public void testUpdateState_group() {
        NotificationBackend.AppRow appRow = new NotificationBackend.AppRow();
        NotificationChannelGroup group = mock(NotificationChannelGroup.class);
        when(group.isBlocked()).thenReturn(true);
        mController.onResume(appRow, null, group, null, null, null, null);
        mController.updateState(mPreference);

        assertFalse(mPreference.isChecked());

        appRow.banned = true;
        mController.onResume(appRow, null, group, null, null, null, null);
        when(group.isBlocked()).thenReturn(true);
        mController.updateState(mPreference);

        assertFalse(mPreference.isChecked());

        appRow.banned = false;
        mController.onResume(appRow, null, group, null, null, null, null);
        when(group.isBlocked()).thenReturn(false);
        mController.updateState(mPreference);

        assertTrue(mPreference.isChecked());
    }

    @Test
    public void testUpdateState_channelBlocked() {
        NotificationBackend.AppRow appRow = new NotificationBackend.AppRow();
        NotificationChannel channel = new NotificationChannel("a", "a", IMPORTANCE_NONE);
        mController.onResume(appRow, channel, null, null, null, null, null);
        mController.updateState(mPreference);

        assertFalse(mPreference.isChecked());

        appRow.banned = true;
        channel = new NotificationChannel("a", "a", IMPORTANCE_HIGH);
        mController.onResume(appRow, channel, null, null, null, null, null);
        mController.updateState(mPreference);

        assertFalse(mPreference.isChecked());

        appRow.banned = false;
        channel = new NotificationChannel("a", "a", IMPORTANCE_HIGH);
        mController.onResume(appRow, channel, null, null, null, null, null);
        mController.updateState(mPreference);

        assertTrue(mPreference.isChecked());
    }

    @Test
    public void testUpdateState_noCrashIfCalledTwice() {
        NotificationBackend.AppRow appRow = new NotificationBackend.AppRow();
        NotificationChannel channel = new NotificationChannel("a", "a", IMPORTANCE_LOW);
        mController.onResume(appRow, channel, null, null, null, null, null);
        mController.updateState(mPreference);
        mController.updateState(mPreference);
    }

    @Test
    public void testUpdateState_doesNotResetImportance() {
        NotificationBackend.AppRow appRow = new NotificationBackend.AppRow();
        NotificationChannel channel = new NotificationChannel("a", "a", IMPORTANCE_LOW);
        mController.onResume(appRow, channel, null, null, null, null, null);
        mController.updateState(mPreference);

        assertEquals(IMPORTANCE_LOW, channel.getImportance());
    }

    @Test
    public void testOnSwitchChanged_channel_default() {
        NotificationBackend.AppRow appRow = new NotificationBackend.AppRow();
        appRow.pkg = "pkg";
        NotificationChannel channel =
                new NotificationChannel(DEFAULT_CHANNEL_ID, "a", IMPORTANCE_UNSPECIFIED);
        when(mBackend.onlyHasDefaultChannel(anyString(), anyInt())).thenReturn(true);
        mController.onResume(appRow, channel, null, null, null, null, null);
        mController.updateState(mPreference);

        mController.onCheckedChanged(null, false);
        assertEquals(IMPORTANCE_NONE, channel.getImportance());
        assertTrue(appRow.banned);

        mController.onCheckedChanged(null, true);
        assertEquals(IMPORTANCE_UNSPECIFIED, channel.getImportance());
        assertFalse(appRow.banned);

        verify(mBackend, times(2)).updateChannel(any(), anyInt(), any());

        verify(mBackend, times(2)).setNotificationsEnabledForPackage(
                anyString(), anyInt(), anyBoolean());
    }

    @Test
    public void testOnSwitchChanged_channel_nonDefault() {
        NotificationBackend.AppRow appRow = new NotificationBackend.AppRow();
        NotificationChannel channel = new NotificationChannel("a", "a", IMPORTANCE_HIGH);
        channel.setOriginalImportance(IMPORTANCE_HIGH);
        mController.onResume(appRow, channel, null, null, null, null, null);
        mController.updateState(mPreference);

        mController.onCheckedChanged(null, false);
        assertEquals(IMPORTANCE_NONE, channel.getImportance());

        mController.onCheckedChanged(null, true);
        assertEquals(IMPORTANCE_HIGH, channel.getImportance());

        verify(mBackend, times(2)).updateChannel(any(), anyInt(), any());
    }
}