/*
 * Copyright (C) 2023 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.security;

import static com.android.settings.security.ContentProtectionTogglePreferenceController.KEY_CONTENT_PROTECTION_PREFERENCE;

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

import static org.mockito.ArgumentMatchers.any;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.never;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;

import android.content.Context;
import android.platform.test.flag.junit.SetFlagsRule;
import android.provider.Settings;

import androidx.preference.PreferenceScreen;
import androidx.test.core.app.ApplicationProvider;

import com.android.settings.testutils.shadow.ShadowUtils;
import com.android.settings.widget.SettingsMainSwitchPreference;
import com.android.settingslib.RestrictedLockUtils;

import org.junit.After;
import org.junit.Before;
import org.junit.Rule;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.Mock;
import org.mockito.MockitoAnnotations;
import org.mockito.junit.MockitoJUnit;
import org.mockito.junit.MockitoRule;
import org.robolectric.RobolectricTestRunner;
import org.robolectric.annotation.Config;

@RunWith(RobolectricTestRunner.class)
@Config(
        shadows = {
            ShadowUtils.class,
        })
public class ContentProtectionTogglePreferenceControllerTest {

    @Rule public final SetFlagsRule mSetFlagsRule = new SetFlagsRule();
    @Rule public final MockitoRule mMockitoRule = MockitoJUnit.rule();

    @Mock private PreferenceScreen mMockScreen;

    private RestrictedLockUtils.EnforcedAdmin mAdmin;
    private SettingsMainSwitchPreference mSwitchPreference;
    private final Context mContext = ApplicationProvider.getApplicationContext();
    private ContentProtectionTogglePreferenceController mController;
    private int mSettingBackupValue;

    @Before
    public void setUp() {
        MockitoAnnotations.initMocks(this);
        mController = new TestContentProtectionTogglePreferenceController();
        mSwitchPreference = new SettingsMainSwitchPreference(mContext);
        when(mMockScreen.findPreference(mController.getPreferenceKey()))
                .thenReturn(mSwitchPreference);
        mSettingBackupValue = getContentProtectionGlobalSetting();
        Settings.Global.putInt(mContext.getContentResolver(), KEY_CONTENT_PROTECTION_PREFERENCE, 0);
    }

    @After
    public void tearDown() {
        Settings.Global.putInt(
                mContext.getContentResolver(),
                KEY_CONTENT_PROTECTION_PREFERENCE,
                mSettingBackupValue);
        ShadowUtils.reset();
    }

    @Test
    public void isAvailable_alwaysAvailable() {
        assertThat(mController.isAvailable()).isTrue();
    }

    @Test
    public void displayPreference() {
        setUpFullyManagedMode();
        SettingsMainSwitchPreference mockSwitchPreference =
                mock(SettingsMainSwitchPreference.class);
        when(mMockScreen.findPreference(any())).thenReturn(mockSwitchPreference);
        when(mockSwitchPreference.getKey()).thenReturn(mController.getPreferenceKey());

        mController = new TestContentProtectionTogglePreferenceController();
        mController.displayPreference(mMockScreen);

        assertThat(mockSwitchPreference).isNotNull();
    }

    @Test
    public void updateState_notFullyManagedMode_enabled() {
        SettingsMainSwitchPreference mockSwitchPreference =
                mock(SettingsMainSwitchPreference.class);
        when(mMockScreen.findPreference(any())).thenReturn(mockSwitchPreference);
        when(mockSwitchPreference.getKey()).thenReturn(mController.getPreferenceKey());

        mController = new TestContentProtectionTogglePreferenceController();
        mController.displayPreference(mMockScreen);
        mController.updateState(mockSwitchPreference);

        verify(mockSwitchPreference, never()).setDisabledByAdmin(any());
    }

    @Test
    public void updateState_fullyManagedMode_disabled() {
        setUpFullyManagedMode();
        SettingsMainSwitchPreference mockSwitchPreference =
                mock(SettingsMainSwitchPreference.class);
        when(mMockScreen.findPreference(any())).thenReturn(mockSwitchPreference);
        when(mockSwitchPreference.getKey()).thenReturn(mController.getPreferenceKey());

        mController = new TestContentProtectionTogglePreferenceController();
        mController.displayPreference(mMockScreen);
        mController.updateState(mockSwitchPreference);

        verify(mockSwitchPreference).setDisabledByAdmin(mAdmin);
    }

    @Test
    public void isChecked_settingTurnOn() {
        Settings.Global.putInt(mContext.getContentResolver(), KEY_CONTENT_PROTECTION_PREFERENCE, 1);

        assertThat(mController.isChecked()).isTrue();
    }

    @Test
    public void isChecked_fullyManagedMode_settingTurnOff() {
        setUpFullyManagedMode();
        Settings.Global.putInt(mContext.getContentResolver(), KEY_CONTENT_PROTECTION_PREFERENCE, 1);
        SettingsMainSwitchPreference mockSwitchPreference =
                mock(SettingsMainSwitchPreference.class);
        when(mMockScreen.findPreference(any())).thenReturn(mockSwitchPreference);
        when(mockSwitchPreference.getKey()).thenReturn(mController.getPreferenceKey());

        mController = new TestContentProtectionTogglePreferenceController();
        mController.displayPreference(mMockScreen);
        mController.updateState(mockSwitchPreference);

        assertThat(mController.isChecked()).isFalse();
    }

    @Test
    public void isChecked_settingTurnOff() {
        Settings.Global.putInt(
                mContext.getContentResolver(), KEY_CONTENT_PROTECTION_PREFERENCE, -1);

        assertThat(mController.isChecked()).isFalse();
        assertThat(getContentProtectionGlobalSetting()).isEqualTo(-1);
    }

    @Test
    public void isChecked_settingDefaultOn() {
        assertThat(mController.isChecked()).isTrue();
        assertThat(getContentProtectionGlobalSetting()).isEqualTo(0);
    }

    @Test
    public void onSwitchChanged_switchChecked_manuallyEnabled() {
        mController.setChecked(false);

        mController.onCheckedChanged(/* switchView= */ null, /* isChecked= */ true);

        assertThat(getContentProtectionGlobalSetting()).isEqualTo(1);
    }

    @Test
    public void onSwitchChanged_switchUnchecked_manuallyDisabled() {
        mController.onCheckedChanged(/* switchView= */ null, /* isChecked= */ false);

        assertThat(getContentProtectionGlobalSetting()).isEqualTo(-1);
    }

    private int getContentProtectionGlobalSetting() {
        return Settings.Global.getInt(
                mContext.getContentResolver(), KEY_CONTENT_PROTECTION_PREFERENCE, 0);
    }

    private void setUpFullyManagedMode() {
        mAdmin = new RestrictedLockUtils.EnforcedAdmin();
    }

    private class TestContentProtectionTogglePreferenceController
            extends ContentProtectionTogglePreferenceController {

        TestContentProtectionTogglePreferenceController() {
            super(ContentProtectionTogglePreferenceControllerTest.this.mContext, "key");
        }

        @Override
        protected RestrictedLockUtils.EnforcedAdmin getEnforcedAdmin() {
            return mAdmin;
        }
    }
}