/*
 * Copyright 2024 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.development;

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

import static org.mockito.Mockito.any;
import static org.mockito.Mockito.doReturn;
import static org.mockito.Mockito.doThrow;
import static org.mockito.Mockito.eq;
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 androidx.preference.PreferenceScreen;
import androidx.preference.SwitchPreference;

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;

@RunWith(RobolectricTestRunner.class)
public class LinuxTerminalPreferenceControllerTest {

    @Mock
    private Context mContext;
    @Mock
    private SwitchPreference mPreference;
    @Mock
    private PreferenceScreen mPreferenceScreen;
    @Mock
    private PackageManager mPackageManager;
    @Mock
    private ApplicationInfo mApplicationInfo;

    private String mTerminalPackageName = "com.android.virtualization.terminal";
    private LinuxTerminalPreferenceController mController;

    @Before
    public void setup() throws Exception {
        MockitoAnnotations.initMocks(this);
        doReturn(mPackageManager).when(mContext).getPackageManager();
        doReturn(mApplicationInfo).when(mPackageManager).getApplicationInfo(
                eq(mTerminalPackageName), any());

        mController = spy(new LinuxTerminalPreferenceController(mContext));
        doReturn(true).when(mController).isAvailable();
        doReturn(mTerminalPackageName).when(mController).getTerminalPackageName();
        when(mPreferenceScreen.findPreference(mController.getPreferenceKey()))
                .thenReturn(mPreference);
        mController.displayPreference(mPreferenceScreen);
    }

    @Test
    public void isAvailable_whenPackageNameIsNull_returnsFalse() throws Exception {
        mController = spy(new LinuxTerminalPreferenceController(mContext));
        doReturn(null).when(mController).getTerminalPackageName();

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

    @Test
    public void isAvailable_whenAppDoesNotExist_returnsFalse() throws Exception {
        doThrow(new NameNotFoundException()).when(mPackageManager).getApplicationInfo(
                eq(mTerminalPackageName), any());

        mController = spy(new LinuxTerminalPreferenceController(mContext));

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

    @Test
    public void onPreferenceChanged_turnOnTerminal() {
        mController.onPreferenceChange(null, true);

        verify(mPackageManager).setApplicationEnabledSetting(
                mTerminalPackageName,
                PackageManager.COMPONENT_ENABLED_STATE_ENABLED,
                /* flags= */ 0);
    }

    @Test
    public void onPreferenceChanged_turnOffTerminal() {
        mController.onPreferenceChange(null, false);

        verify(mPackageManager).setApplicationEnabledSetting(
                mTerminalPackageName,
                PackageManager.COMPONENT_ENABLED_STATE_DEFAULT,
                /* flags= */ 0);
    }

    @Test
    public void updateState_preferenceShouldBeChecked() {
        when(mPackageManager.getApplicationEnabledSetting(mTerminalPackageName))
                .thenReturn(PackageManager.COMPONENT_ENABLED_STATE_ENABLED);
        mController.updateState(mPreference);

        verify(mPreference).setChecked(true);
    }

    @Test
    public void updateState_preferenceShouldNotBeChecked() {
        when(mPackageManager.getApplicationEnabledSetting(mTerminalPackageName))
                .thenReturn(PackageManager.COMPONENT_ENABLED_STATE_DEFAULT);
        mController.updateState(mPreference);

        verify(mPreference).setChecked(false);
    }
}