/*
 * Catroid: An on-device visual programming system for Android devices
 * Copyright (C) 2010-2016 The Catrobat Team
 * (<http://developer.catrobat.org/credits>)
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * An additional term exception under section 7 of the GNU Affero
 * General Public License, version 3, is available at
 * http://developer.catrobat.org/license_additional_term
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package org.catrobat.catroid.io;

import android.util.Log;

import com.google.gson.JsonDeserializationContext;
import com.google.gson.JsonDeserializer;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import com.google.gson.JsonParseException;
import com.google.gson.JsonPrimitive;
import com.google.gson.JsonSerializationContext;
import com.google.gson.JsonSerializer;

import org.catrobat.catroid.content.Script;

import java.lang.reflect.Type;

public class BackpackScriptSerializerAndDeserializer implements JsonSerializer<Script>, JsonDeserializer<Script> {

	private static final String TAG = BackpackScriptSerializerAndDeserializer.class.getSimpleName();
	private static final String PACKAGE_NAME = "org.catrobat.catroid.content.";
	private static final String PACKAGE_NAME_PHYSICS = "org.catrobat.catroid.physics.content.bricks.";

	private static final String TYPE = "scripttype";
	private static final String PROPERTY = "properties";

	@Override
	public JsonElement serialize(Script script, Type typeOfSrc, JsonSerializationContext context) {
		JsonObject jsonObject = new JsonObject();
		jsonObject.add(TYPE, new JsonPrimitive(script.getClass().getSimpleName()));
		jsonObject.add(PROPERTY, context.serialize(script, script.getClass()));
		return jsonObject;
	}

	@Override
	public Script deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException {

		JsonObject jsonObject = json.getAsJsonObject();
		String type = jsonObject.get(TYPE).getAsString();
		JsonElement element = jsonObject.get(PROPERTY);

		try {
			return context.deserialize(element, Class.forName(PACKAGE_NAME + type));
		} catch (ClassNotFoundException e) {
			try {
				return context.deserialize(element, Class.forName(PACKAGE_NAME_PHYSICS + type));
			} catch (ClassNotFoundException e2) {
				Log.e(TAG, "Could not deserialize backpacked script element!");
				throw new JsonParseException("Unknown element type: " + type, e2);
			}
		}
	}
}