/*
 * 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;

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

import static org.mockito.Matchers.anyInt;
import static org.mockito.Matchers.anyString;
import static org.mockito.Mockito.doReturn;
import static org.mockito.Mockito.spy;
import static org.mockito.Mockito.when;

import android.content.Context;
import android.content.SharedPreferences;
import android.content.pm.ActivityInfo;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.support.annotation.NonNull;

import com.android.settings.fuelgauge.batterytip.AnomalyConfigJobService;
import com.android.settings.testutils.SettingsRobolectricTestRunner;

import org.json.JSONException;
import org.json.JSONObject;
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 java.io.OutputStream;
import java.io.PrintWriter;

@RunWith(SettingsRobolectricTestRunner.class)
public class SettingsDumpServiceTest {

    private static final String PACKAGE_BROWSER = "com.android.test.browser";
    private static final String PACKAGE_NULL = "android";
    private static final int ANOMALY_VERSION = 2;

    @Mock
    private PackageManager mPackageManager;
    @Mock
    private ResolveInfo mResolveInfo;
    private TestService mTestService;

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

        when(mPackageManager.resolveActivity(TestService.BROWSER_INTENT,
                PackageManager.MATCH_DEFAULT_ONLY)).thenReturn(mResolveInfo);
        mTestService = spy(new TestService());
        mTestService.setPackageManager(mPackageManager);
    }

    @Test
    public void testDumpDefaultBrowser_DefaultBrowser_ReturnBrowserName() {
        mResolveInfo.activityInfo = new ActivityInfo();
        mResolveInfo.activityInfo.packageName = PACKAGE_BROWSER;

        assertThat(mTestService.dumpDefaultBrowser()).isEqualTo(PACKAGE_BROWSER);
    }

    @Test
    public void testDumpDefaultBrowser_NoDefault_ReturnNull() {
        mResolveInfo.activityInfo = new ActivityInfo();
        mResolveInfo.activityInfo.packageName = PACKAGE_NULL;

        assertThat(mTestService.dumpDefaultBrowser()).isEqualTo(null);
    }

    @Test
    public void testDumpAnomalyDetection_returnAnomalyInfo() throws JSONException {
        final SharedPreferences sharedPreferences =
                RuntimeEnvironment.application.getSharedPreferences(AnomalyConfigJobService.PREF_DB,
                        Context.MODE_PRIVATE);
        SharedPreferences.Editor editor = sharedPreferences.edit();
        editor.putInt(AnomalyConfigJobService.KEY_ANOMALY_CONFIG_VERSION, ANOMALY_VERSION);
        editor.commit();
        doReturn(sharedPreferences).when(mTestService).getSharedPreferences(anyString(), anyInt());

        final JSONObject jsonObject = mTestService.dumpAnomalyDetection();

        assertThat(jsonObject.getInt(AnomalyConfigJobService.KEY_ANOMALY_CONFIG_VERSION)).isEqualTo(
                ANOMALY_VERSION);
    }

    @Test
    public void testDump_ReturnJsonObject() throws JSONException {
        mResolveInfo.activityInfo = new ActivityInfo();
        mResolveInfo.activityInfo.packageName = PACKAGE_BROWSER;
        TestPrintWriter printWriter = new TestPrintWriter(System.out);

        mTestService.dump(null, printWriter, null);
        JSONObject object = (JSONObject) printWriter.getPrintObject();

        assertThat(object.get(TestService.KEY_SERVICE)).isNotNull();
    }

    /**
     * Test service used to pass in the mock {@link PackageManager}
     */
    private class TestService extends SettingsDumpService {
        private PackageManager mPm;

        public void setPackageManager(PackageManager pm) {
            mPm = pm;
        }

        @Override
        public PackageManager getPackageManager() {
            return mPm;
        }
    }

    /**
     * Test printWriter to store the object to be printed
     */
    private class TestPrintWriter extends PrintWriter {
        private Object mPrintObject;

        private TestPrintWriter(@NonNull OutputStream out) {
            super(out);
        }

        @Override
        public void println(Object object) {
            mPrintObject = object;
        }

        private Object getPrintObject() {
            return mPrintObject;
        }
    }
}