/*
 * 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.dialer.common.concurrent;

import android.app.FragmentManager;
import android.content.Context;
import com.android.dialer.common.concurrent.Annotations.BackgroundExecutor;
import com.android.dialer.common.concurrent.Annotations.LightweightExecutor;
import com.android.dialer.common.concurrent.Annotations.NonUiParallel;
import com.android.dialer.common.concurrent.Annotations.Ui;
import com.android.dialer.inject.HasRootComponent;
import com.google.common.util.concurrent.ListeningExecutorService;
import dagger.Subcomponent;
import java.util.concurrent.ExecutorService;

/** Dagger component which provides a {@link DialerExecutorFactory}. */
@Subcomponent
public abstract class DialerExecutorComponent {

  public abstract DialerExecutorFactory dialerExecutorFactory();

  @NonUiParallel
  public abstract ExecutorService lowPriorityThreadPool();

  @Ui
  public abstract ListeningExecutorService uiExecutor();

  @BackgroundExecutor
  public abstract ListeningExecutorService backgroundExecutor();

  @LightweightExecutor
  public abstract ListeningExecutorService lightweightExecutor();

  public <OutputT> UiListener<OutputT> createUiListener(
      FragmentManager fragmentManager, String taskId) {
    return UiListener.create(fragmentManager, taskId);
  }

  public static DialerExecutorComponent get(Context context) {
    return ((DialerExecutorComponent.HasComponent)
            ((HasRootComponent) context.getApplicationContext()).component())
        .dialerExecutorComponent();
  }

  /** Used to refer to the root application component. */
  public interface HasComponent {
    DialerExecutorComponent dialerExecutorComponent();
  }
}