/*
 * Copyright (C) 2015 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.afwsamples.testdpc.profilepolicy.crossprofilewidgetprovider;

import android.app.admin.DevicePolicyManager;
import android.appwidget.AppWidgetManager;
import android.appwidget.AppWidgetProviderInfo;
import android.content.Context;
import com.afwsamples.testdpc.DeviceAdminReceiver;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;

/** Builds the cross-profile widget providers list. */
public class ManageCrossProfileWidgetProviderUtil {

  private static ManageCrossProfileWidgetProviderUtil sInstance;

  private Context mContext;

  private AppWidgetManager mAppWidgetManager;

  private DevicePolicyManager mDevicePolicyManager;

  private ManageCrossProfileWidgetProviderUtil(Context context) {
    mContext = context.getApplicationContext();
    mAppWidgetManager = AppWidgetManager.getInstance(mContext);
    mDevicePolicyManager =
        (DevicePolicyManager) mContext.getSystemService(Context.DEVICE_POLICY_SERVICE);
  }

  public static synchronized ManageCrossProfileWidgetProviderUtil getInstance(Context context) {
    if (sInstance == null) {
      sInstance = new ManageCrossProfileWidgetProviderUtil(context);
    }
    return sInstance;
  }

  /**
   * Gets a list of work profile apps that have disabled cross-profile widget providers.
   *
   * @return A list of package names which have disabled cross-profile widget providers.
   */
  public List<String> getDisabledCrossProfileWidgetProvidersList() {
    Set<String> enabledCrossProfileWidgetProvidersList =
        new HashSet<String>(
            mDevicePolicyManager.getCrossProfileWidgetProviders(
                DeviceAdminReceiver.getComponentName(mContext)));
    // Cross-profile widgets are enabled by their package name. Use set to avoid duplicates.
    Set<String> disabledCrossProfileWidgetProvidersPackageNameSet = new HashSet<String>();
    List<AppWidgetProviderInfo> appWidgetProviderInfoList =
        mAppWidgetManager.getInstalledProviders();
    for (AppWidgetProviderInfo appWidgetProviderInfo : appWidgetProviderInfoList) {
      String appWidgetProviderPackage = appWidgetProviderInfo.provider.getPackageName();
      if (!enabledCrossProfileWidgetProvidersList.contains(appWidgetProviderPackage)) {
        disabledCrossProfileWidgetProvidersPackageNameSet.add(appWidgetProviderPackage);
      }
    }
    return new ArrayList<String>(disabledCrossProfileWidgetProvidersPackageNameSet);
  }
}
