/*
 * 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;

/**
 * <p>Google任务异步同步任务类。</p>
 * <p>设计意图：使用AsyncTask实现Google任务的异步同步操作，避免阻塞主线程，并提供用户友好的通知反馈。</p>
 * <p>核心职责：</p>
 * <ul>
 * <li>在后台线程执行Google任务的同步操作</li>
 * <li>显示同步进度和结果的通知</li>
 * <li>处理同步完成后的回调</li>
 * <li>支持取消同步操作</li>
 * </ul>
 * <p>关键关联：</p>
 * <ul>
 * <li>继承自{@link AsyncTask}，实现异步任务框架</li>
 * <li>使用{@link GTaskManager}执行实际的同步逻辑</li>
 * <li>与{@link GTaskSyncService}配合，支持服务环境下的广播通知</li>
 * <li>通过{@link OnCompleteListener}提供同步完成回调</li>
 * </ul>
 */
public class GTaskASyncTask extends AsyncTask<Void, String, Integer> {

    /**
     * Google任务同步通知的唯一ID
     */
    private static int GTASK_SYNC_NOTIFICATION_ID = 5234235;

    /**
     * <p>同步完成监听器接口。</p>
     * <p>设计意图：提供Google任务同步完成后的回调机制。</p>
     */
    public interface OnCompleteListener {
        /**
         * 同步完成时调用的方法
         */
        void onComplete();
    }

    /**
     * 上下文对象，用于访问系统服务和资源
     */
    private Context mContext;

    /**
     * 通知管理器，用于显示同步进度和结果通知
     */
    private NotificationManager mNotifiManager;

    /**
     * Google任务管理器，用于执行实际的同步逻辑
     */
    private GTaskManager mTaskManager;

    /**
     * 同步完成监听器，用于处理同步完成后的回调
     */
    private OnCompleteListener mOnCompleteListener;

    /**
     * 构造方法，初始化Google任务异步同步任务。
     * 
     * @param context 上下文对象，用于访问系统服务和资源
     * @param listener 同步完成监听器，用于处理同步完成后的回调
     */
    public GTaskASyncTask(Context context, OnCompleteListener listener) {
        mContext = context;
        mOnCompleteListener = listener;
        mNotifiManager = (NotificationManager) mContext
                .getSystemService(Context.NOTIFICATION_SERVICE);
        mTaskManager = GTaskManager.getInstance();
    }

    /**
     * 取消正在进行的同步操作。
     */
    public void cancelSync() {
        mTaskManager.cancelSync();
    }

    /**
     * 发布同步进度信息。
     * 
     * @param message 进度信息消息
     */
    public void publishProgess(String message) {
        publishProgress(new String[] {
            message
        });
    }

//    private void showNotification(int tickerId, String content) {
//        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;
//        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);
//        }
//        notification.setLatestEventInfo(mContext, mContext.getString(R.string.app_name), content,
//                pendingIntent);
//        mNotifiManager.notify(GTASK_SYNC_NOTIFICATION_ID, notification);
//    }
    /**
     * <p>显示同步通知。</p>
     * <p>业务逻辑：根据同步状态创建并显示相应的通知，支持成功、失败、取消等不同状态。</p>
     * <p>通知点击行为：
     * <ul>
     * <li>成功状态：点击打开笔记列表页面</li>
     * <li>其他状态：点击打开笔记设置页面</li>
     * </ul>
     * </p>
     * 
     * @param tickerId 通知标题资源ID
     * @param content 通知内容字符串
     */
private void showNotification(int tickerId, String content) {
    PendingIntent pendingIntent;
    if (tickerId != R.string.ticker_success) {
        pendingIntent = PendingIntent.getActivity(mContext, 0, new Intent(mContext,
                NotesPreferenceActivity.class), PendingIntent.FLAG_IMMUTABLE);
    } else {
        pendingIntent = PendingIntent.getActivity(mContext, 0, new Intent(mContext,
                NotesListActivity.class), PendingIntent.FLAG_IMMUTABLE);
    }
    Notification.Builder builder = new Notification.Builder(mContext)
            .setAutoCancel(true)
            .setContentTitle(mContext.getString(R.string.app_name))
            .setContentText(content)
            .setContentIntent(pendingIntent)
            .setWhen(System.currentTimeMillis())
            .setOngoing(true);
    Notification notification=builder.getNotification();
    mNotifiManager.notify(GTASK_SYNC_NOTIFICATION_ID, notification);
}
    /**
     * <p>在后台线程执行同步操作。</p>
     * <p>业务逻辑：初始化同步进度通知，调用GTaskManager执行实际的同步逻辑。</p>
     * 
     * @param unused 未使用的参数
     * @return 同步结果状态码，对应GTaskManager中的STATE_*常量
     */
    @Override
    protected Integer doInBackground(Void... unused) {
        publishProgess(mContext.getString(R.string.sync_progress_login, NotesPreferenceActivity
                .getSyncAccountName(mContext)));
        return mTaskManager.sync(mContext, this);
    }

    /**
     * <p>更新同步进度。</p>
     * <p>业务逻辑：显示当前同步进度通知，如果在服务环境下，还会发送广播通知。</p>
     * 
     * @param progress 进度信息数组，其中第一个元素为进度消息
     */
    @Override
    protected void onProgressUpdate(String... progress) {
        showNotification(R.string.ticker_syncing, progress[0]);
        if (mContext instanceof GTaskSyncService) {
            ((GTaskSyncService) mContext).sendBroadcast(progress[0]);
        }
    }

    /**
     * <p>处理同步结果。</p>
     * <p>业务逻辑：根据同步结果显示相应的通知，更新最后同步时间，并调用完成监听器。</p>
     * <p>同步结果处理：
     * <ul>
     * <li>STATE_SUCCESS：显示成功通知，更新最后同步时间</li>
     * <li>STATE_NETWORK_ERROR：显示网络错误通知</li>
     * <li>STATE_INTERNAL_ERROR：显示内部错误通知</li>
     * <li>STATE_SYNC_CANCELLED：显示同步取消通知</li>
     * </ul>
     * </p>
     * 
     * @param result 同步结果状态码，对应GTaskManager中的STATE_*常量
     */
    @Override
    protected void onPostExecute(Integer result) {
        if (result == GTaskManager.STATE_SUCCESS) {
            showNotification(R.string.ticker_success, mContext.getString(
                    R.string.success_sync_account, mTaskManager.getSyncAccount()));
            NotesPreferenceActivity.setLastSyncTime(mContext, System.currentTimeMillis());
        } else if (result == GTaskManager.STATE_NETWORK_ERROR) {
            showNotification(R.string.ticker_fail, mContext.getString(R.string.error_sync_network));
        } else if (result == GTaskManager.STATE_INTERNAL_ERROR) {
            showNotification(R.string.ticker_fail, mContext.getString(R.string.error_sync_internal));
        } else if (result == GTaskManager.STATE_SYNC_CANCELLED) {
            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();
        }
    }
}