/*
 * 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.data;

import android.database.Cursor;
import android.util.Log;

import net.micode.notes.tool.GTaskStringUtils;

import org.json.JSONException;
import org.json.JSONObject;

/**
 * Google Tasks元数据类 - 用于存储Google Tasks相关元信息
 * 继承Task基类，实现Google Tasks与本地笔记的关联逻辑
 */
public class MetaData extends Task {
    private final static String TAG = MetaData.class.getSimpleName();

    private String mRelatedGid = null;

    public void setMeta(String gid, JSONObject metaInfo) {
        try {
            metaInfo.put(GTaskStringUtils.META_HEAD_GTASK_ID, gid);
        } catch (JSONException e) {
            Log.e(TAG, "failed to put related gid");
        }
        setNotes(metaInfo.toString());
        setName(GTaskStringUtils.META_NOTE_NAME);
    }

    public String getRelatedGid() {
        return mRelatedGid;
    }
    /**
     * 判断元数据是否值得保存
     * 只要存在笔记内容即认为值得保存
     * @return 布尔值，true表示值得保存
     */
    @Override
    public boolean isWorthSaving() {
        return getNotes() != null;
    }
    /**
     * 从远程JSON数据设置内容
     * 解析远程JSON中的元数据，提取关联的Google Tasks ID
     * @param js 包含远程数据的JSON对象
     */
    @Override
    public void setContentByRemoteJSON(JSONObject js) {
        super.setContentByRemoteJSON(js);
        if (getNotes() != null) {
            try {
                JSONObject metaInfo = new JSONObject(getNotes().trim());
                mRelatedGid = metaInfo.getString(GTaskStringUtils.META_HEAD_GTASK_ID);
            } catch (JSONException e) {
                Log.w(TAG, "failed to get related gid");
                mRelatedGid = null;
            }
        }
    }
    /**
     * 从本地JSON数据设置内容（禁止调用）
     * 该方法在元数据类中无实际用途，调用会抛出异常
     */
    @Override
    public void setContentByLocalJSON(JSONObject js) {
        // this function should not be called
        throw new IllegalAccessError("MetaData:setContentByLocalJSON should not be called");
    }
    /**
     * 从内容生成本地JSON（禁止调用）
     * 该方法在元数据类中无实际用途，调用会抛出异常
     */
    @Override
    public JSONObject getLocalJSONFromContent() {
        throw new IllegalAccessError("MetaData:getLocalJSONFromContent should not be called");
    }
    /**
     * 获取同步操作类型（禁止调用）
     * 该方法在元数据类中无实际用途，调用会抛出异常
     */
    @Override
    public int getSyncAction(Cursor c) {
        throw new IllegalAccessError("MetaData:getSyncAction should not be called");
    }

}