/**
 * Copyright (C) 2013 - 2015 the enviroCar community
 *
 * This file is part of the enviroCar app.
 *
 * The enviroCar app is free software: you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as published
 * by the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * The enviroCar app 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 General
 * Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with the enviroCar app. If not, see http://www.gnu.org/licenses/.
 */
package org.envirocar.remote.serializer;

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.JsonSerializationContext;
import com.google.gson.JsonSerializer;

import org.envirocar.core.entity.Car;
import org.envirocar.core.entity.Fueling;
import org.envirocar.core.entity.FuelingImpl;
import org.envirocar.core.util.Util;

import java.lang.reflect.Type;
import java.text.ParseException;

/**
 * @author dewall
 */
public class FuelingSerializer implements JsonSerializer<Fueling>, JsonDeserializer<Fueling> {

    @Override
    public JsonElement serialize(Fueling src, Type typeOfSrc, JsonSerializationContext context) {
        JsonObject result = new JsonObject();
        result.addProperty(Fueling.KEY_CAR, src.getCar().getId());
        result.addProperty(Fueling.KEY_FUEL_TYPE, src.getCar().getFuelType().toString());
        result.addProperty(Fueling.KEY_TIME, Util.longToIsoDate(src.getTime()));
        result.addProperty(Fueling.KEY_COMMENT, src.getComment());

        result.add(Fueling.KEY_COST, createFuelingProperty(src.getCost(),
                src.getCostUnit().toString()));
        result.add(Fueling.KEY_MILEAGE, createFuelingProperty(src.getMilage(),
                src.getMilageUnit().toString()));
        result.add(Fueling.KEY_VOLUME, createFuelingProperty(src.getVolume(),
                src.getVolumeUnit().toString()));

        result.addProperty(Fueling.KEY_MISSED_FUEL_STOP, src.isMissedFuelStop());
        result.addProperty(Fueling.KEY_PARTIAL_FUELING, src.isPartialFueling());

        return result;
    }

    private JsonObject createFuelingProperty(double value, String unit){
        JsonObject result = new JsonObject();
        result.addProperty(Fueling.KEY_VALUE, value);
        result.addProperty(Fueling.KEY_UNIT, unit);
        return result;
    }

    @Override
    public Fueling deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context)
            throws JsonParseException {
        JsonObject jsonObject = (JsonObject) json;

        Fueling result = new FuelingImpl();
        result.setRemoteID(jsonObject.get(Fueling.KEY_REMOTE_ID).getAsString());

        try {
            result.setTime(Util.isoDateToLong(jsonObject.get(Fueling.KEY_TIME).getAsString()));
        } catch (ParseException e) {
            throw new JsonParseException(e);
        }

        result.setCar(context.deserialize(jsonObject.get(Fueling.KEY_CAR), Car.class));

        if(jsonObject.has(Fueling.KEY_MISSED_FUEL_STOP)){
            result.setMissedFuelStop(jsonObject.get(Fueling.KEY_MISSED_FUEL_STOP).getAsBoolean());
        } else {
            result.setMissedFuelStop(true);
        }

        if(jsonObject.has(Fueling.KEY_PARTIAL_FUELING)){
            result.setPartialFueling(jsonObject.get(Fueling.KEY_PARTIAL_FUELING).getAsBoolean());
        } else {
            result.setPartialFueling(false);
        }

        JsonObject milageObject = jsonObject.get(Fueling.KEY_MILEAGE).getAsJsonObject();
        result.setMilage(milageObject.get(Fueling.KEY_VALUE).getAsDouble(),
                Fueling.MilageUnit.fromString(milageObject.get(Fueling.KEY_UNIT).getAsString()));

        JsonObject volumeObject = jsonObject.get(Fueling.KEY_VOLUME).getAsJsonObject();
        result.setVolume(volumeObject.get(Fueling.KEY_VALUE).getAsDouble(),
                Fueling.VolumeUnit.fromString(volumeObject.get(Fueling.KEY_UNIT).getAsString()));

        JsonObject costObject = jsonObject.get(Fueling.KEY_COST).getAsJsonObject();
        result.setCost(costObject.get(Fueling.KEY_VALUE).getAsDouble(),
                Fueling.CostUnit.fromString(costObject.get(Fueling.KEY_UNIT).getAsString()));

        if(jsonObject.has(Fueling.KEY_COMMENT)) {
            result.setComment(jsonObject.get(Fueling.KEY_COMMENT).getAsString());
        }

        return result;
    }
}