/**
 * Copyright (C) 2016 Marc Gonzalez Diez Open Source Project
 * <p>
 * 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
 * <p>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p>
 * 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.mgdiez.tweetstat;

import android.os.Handler;
import android.os.Looper;

import com.mgdiez.domain.executor.PostExecutionThread;

import javax.inject.Inject;
import javax.inject.Singleton;

import rx.Scheduler;
import rx.android.schedulers.AndroidSchedulers;

@Singleton
public class UIThread implements PostExecutionThread {

    private static class LazyHolder {
        private static final UIThread INSTANCE = new UIThread();
    }

    public static UIThread getInstance() {
        return LazyHolder.INSTANCE;
    }

    private final Handler handler;

    @Inject
    public UIThread() {
        this.handler = new Handler(Looper.getMainLooper());
    }

    /**
     * Causes the Runnable r to be added to the message queue.
     * The runnable will be run on the main thread.
     *
     * @param runnable {@link Runnable} to be executed.
     */

    @Override
    public void post(Runnable runnable) {
        handler.post(runnable);
    }

    @Override
    public Scheduler getScheduler() {
        return AndroidSchedulers.mainThread();
    }
}
