/*
 * 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.ui;

import android.app.AlarmManager;
import android.app.PendingIntent;
import android.content.BroadcastReceiver;
import android.content.ContentUris;
import android.content.Context;
import android.content.Intent;
import android.database.Cursor;

import net.micode.notes.data.Notes;
import net.micode.notes.data.Notes.NoteColumns;


public class AlarmInitReceiver extends BroadcastReceiver {

    // 查询的字段
    private static final String[] PROJECTION = new String[]{
            NoteColumns.ID,                     // 笔记ID列索引
            NoteColumns.ALERTED_DATE            // 提醒日期列索引
    };

    private static final int COLUMN_ID = 0;                     // 笔记ID在查询结果中的列索引
    private static final int COLUMN_ALERTED_DATE = 1;           // 提醒日期在查询结果中的列索引

    @Override
    public void onReceive(Context context, Intent intent) {
        long currentDate = System.currentTimeMillis();          // 当前时间

        // 查询需要提醒的笔记
        Cursor c = context.getContentResolver().query(Notes.CONTENT_NOTE_URI,
                PROJECTION,
                NoteColumns.ALERTED_DATE + ">? AND " + NoteColumns.TYPE + "=" + Notes.TYPE_NOTE,
                new String[]{String.valueOf(currentDate)},
                null);

        if (c != null) {
            if (c.moveToFirst()) {
                do {
                    long alertDate = c.getLong(COLUMN_ALERTED_DATE);                // 获取提醒日期

                    Intent sender = new Intent(context, AlarmReceiver.class);      // 创建一个意图，用于启动AlarmReceiver类
                    sender.setData(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, c.getLong(COLUMN_ID)));  // 将笔记的URI添加到意图中

                    PendingIntent pendingIntent = PendingIntent.getBroadcast(context, 0, sender, PendingIntent.FLAG_IMMUTABLE);  // 创建一个PendingIntent对象

                    AlarmManager alarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);  // 获取AlarmManager实例
                    alarmManager.set(AlarmManager.RTC_WAKEUP, alertDate, pendingIntent);   // 设置闹钟，使用RTC_WAKEUP模式

                } while (c.moveToNext());   // 遍历查询结果，直到遍历完所有需要提醒的笔记
            }
            c.close();
        }
    }
}