/*
 * 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;


public class GTaskASyncTask extends AsyncTask<Void, String, Integer> {
    // 同步通知的ID，确保唯一性
    private static int GTASK_SYNC_NOTIFICATION_ID = 5234235;

    // 同步完成回调接口
    public interface OnCompleteListener {
        void onComplete(); // 同步完成时调用
    }

    private Context mContext; // 上下文对象
    private NotificationManager mNotifiManager; // 通知管理器
    private GTaskManager mTaskManager; // 任务管理器
    private OnCompleteListener mOnCompleteListener; // 完成监听器

    // 构造函数
    public GTaskASyncTask(Context context, OnCompleteListener listener) {
        mContext = context; // 保存上下文
        mOnCompleteListener = listener; // 保存完成监听器
        mNotifiManager = (NotificationManager) mContext
                .getSystemService(Context.NOTIFICATION_SERVICE); // 获取通知管理器服务
        mTaskManager = GTaskManager.getInstance(); // 获取任务管理器单例
    }

    // 取消同步操作
    public void cancelSync() {
        mTaskManager.cancelSync(); // 委托给任务管理器取消同步
    }

    // 发布同步进度
    public void publishProgess(String message) {
        publishProgress(new String[] {
            message // 发布单个进度消息
        });
    }

    // 显示通知
    private void showNotification(int tickerId, String content) {
        // 创建通知对象
        Notification notification = new Notification(R.drawable.notification, mContext
                .getString(tickerId), System.currentTimeMillis()); // 设置图标、文本和时间戳
        notification.defaults = Notification.DEFAULT_LIGHTS; // 设置默认灯光效果
        notification.flags = Notification.FLAG_AUTO_CANCEL; // 设置点击后自动取消
        
        PendingIntent pendingIntent;
        if (tickerId != R.string.ticker_success) {
            // 如果不是成功状态，点击通知跳转到设置页面
            pendingIntent = PendingIntent.getActivity(mContext, 0, new Intent(mContext,
                    NotesPreferenceActivity.class), 0);
        } else {
            // 如果是成功状态，点击通知跳转到笔记列表页面
            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); // 设置标题、内容和点击意图
        mNotifiManager.notify(GTASK_SYNC_NOTIFICATION_ID, notification); // 显示通知
    }

    // 后台执行同步任务
    @Override
    protected Integer doInBackground(Void... unused) {
        // 发布登录进度
        publishProgess(mContext.getString(R.string.sync_progress_login, NotesPreferenceActivity
                .getSyncAccountName(mContext))); // 显示正在登录指定账户的进度
        return mTaskManager.sync(mContext, this); // 执行同步操作并返回结果状态
    }

    // 更新同步进度
    @Override
    protected void onProgressUpdate(String... progress) {
        showNotification(R.string.ticker_syncing, progress[0]); // 显示同步中的通知
        if (mContext instanceof GTaskSyncService) {
            // 如果上下文是同步服务，发送广播通知进度
            ((GTaskSyncService) mContext).sendBroadcast(progress[0]);
        }
    }

    // 同步完成后处理结果
    @Override
    protected void onPostExecute(Integer result) {
        // 根据同步结果显示不同的通知
        if (result == GTaskManager.STATE_SUCCESS) {
            // 同步成功
            showNotification(R.string.ticker_success, mContext.getString(
                    R.string.success_sync_account, mTaskManager.getSyncAccount())); // 显示成功通知
            NotesPreferenceActivity.setLastSyncTime(mContext, System.currentTimeMillis()); // 更新最后同步时间
        } else if (result == GTaskManager.STATE_NETWORK_ERROR) {
            // 网络错误
            showNotification(R.string.ticker_fail, mContext.getString(R.string.error_sync_network)); // 显示网络错误通知
        } else if (result == GTaskManager.STATE_INTERNAL_ERROR) {
            // 内部错误
            showNotification(R.string.ticker_fail, mContext.getString(R.string.error_sync_internal)); // 显示内部错误通知
        } else if (result == GTaskManager.STATE_SYNC_CANCELLED) {
            // 同步被取消
            showNotification(R.string.ticker_cancel, mContext
                    .getString(R.string.error_sync_cancelled)); // 显示取消通知
        }
        
        // 通知监听器同步已完成
        if (mOnCompleteListener != null) {
            new Thread(new Runnable() {
                public void run() {
                    mOnCompleteListener.onComplete(); // 在新线程中调用完成回调
                }
            }).start();
        }
    }
}