/*
 * Copyright (c) 2010 - 2011, The MiCode Open Source Community (www.micode.net)
 *
 * 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 net.micode.notes.gtask.remote;

import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.os.AsyncTask;
import net.micode.notes.R;
import net.micode.notes.ui.NotesListActivity;
import net.micode.notes.ui.NotesPreferenceActivity;

// GTaskASyncTask类继承自AsyncTask，用于在后台异步执行与Google Tasks同步相关的任务
public class GTaskASyncTask extends AsyncTask<Void, String, Integer> {
    // 同步通知的ID
    private static int GTASK_SYNC_NOTIFICATION_ID = 5234235;

    // 定义一个接口，用于在任务完成时回调
    public interface OnCompleteListener {
        void onComplete();
    }

    // 应用程序上下文
    private Context mContext;
    // 通知管理器，用于显示通知
    private NotificationManager mNotifiManager;
    // GTaskManager实例，用于执行同步操作
    private GTaskManager mTaskManager;
    // 任务完成监听器
    private OnCompleteListener mOnCompleteListener;

    // 构造函数，初始化相关属性
    public GTaskASyncTask(Context context, OnCompleteListener listener) {
        mContext = context;
        mOnCompleteListener = listener;
        // 获取系统通知服务
        mNotifiManager = (NotificationManager) mContext.getSystemService(Context.NOTIFICATION_SERVICE);
        // 获取GTaskManager实例
        mTaskManager = GTaskManager.getInstance();
    }

    // 取消同步任务
    public void cancelSync() {
        mTaskManager.cancelSync();
    }

    // 发布同步进度信息
    public void publishProgess(String message) {
        publishProgress(new String[]{message});
    }

    // 显示通知
    private void showNotification(int tickerId, String content) {
        // 创建一个通知
        Notification notification = new Notification(R.drawable.notification, mContext.getString(tickerId), System.currentTimeMillis());
        notification.defaults = Notification.DEFAULT_LIGHTS;
        notification.flags = Notification.FLAG_AUTO_CANCEL;
        PendingIntent pendingIntent;
        // 根据通知类型设置点击通知后的意图
        if (tickerId!= R.string.ticker_success) {
            pendingIntent = PendingIntent.getActivity(mContext, 0, new Intent(mContext, NotesPreferenceActivity.class), 0);
        } else {
            pendingIntent = PendingIntent.getActivity(mContext, 0, new Intent(mContext, NotesListActivity.class), 0);
        }
        // 设置通知的详细信息
        notification.setLatestEventInfo(mContext, mContext.getString(R.string.app_name), content, pendingIntent);
        // 显示通知
        mNotifiManager.notify(GTASK_SYNC_NOTIFICATION_ID, notification);
    }

    // 在后台线程执行同步任务
    @Override
    protected Integer doInBackground(Void... unused) {
        // 发布登录进度信息
        publishProgess(mContext.getString(R.string.sync_progress_login, NotesPreferenceActivity.getSyncAccountName(mContext)));
        // 执行同步操作并返回结果
        return mTaskManager.sync(mContext, this);
    }

    // 在主线程更新同步进度通知
    @Override
    protected void onProgressUpdate(String... progress) {
        showNotification(R.string.ticker_syncing, progress[0]);
        if (mContext instanceof GTaskSyncService) {
            ((GTaskSyncService) mContext).sendBroadcast(progress[0]);
        }
    }

    // 在主线程处理同步任务完成后的结果
    @Override
    protected void onPostExecute(Integer result) {
        if (result == GTaskManager.STATE_SUCCESS) {
            // 同步成功，显示成功通知
            showNotification(R.string.ticker_success, mContext.getString(R.string.success_sync_account, mTaskManager.getSyncAccount()));
            // 设置最后同步时间
            NotesPreferenceActivity.setLastSyncTime(mContext, System.currentTimeMillis());
        } else if (result == GTaskManager.STATE_NETWORK_ERROR) {
            // 网络错误，显示失败通知
            showNotification(R.string.ticker_fail, mContext.getString(R.string.error_sync_network));
        } else if (result == GTaskManager.STATE_INTERNAL_ERROR) {
            // 内部错误，显示失败通知
            showNotification(R.string.ticker_fail, mContext.getString(R.string.error_sync_internal));
        } else if (result == GTaskManager.STATE_SYNC_CANCELLED) {
            // 同步取消，显示取消通知
            showNotification(R.string.ticker_cancel, mContext.getString(R.string.error_sync_cancelled));
        }
        if (mOnCompleteListener!= null) {
            new Thread(new Runnable() {
                public void run() {
                    mOnCompleteListener.onComplete();
                }
            }).start();
        }
    }
}