package com.egysoft.gdx.assets.loaders;

import com.apollo.BehaviorTemplate;
import com.badlogic.gdx.assets.AssetDescriptor;
import com.badlogic.gdx.assets.AssetLoaderParameters;
import com.badlogic.gdx.assets.AssetManager;
import com.badlogic.gdx.assets.loaders.FileHandleResolver;
import com.badlogic.gdx.assets.loaders.SynchronousAssetLoader;
import com.badlogic.gdx.files.FileHandle;
import com.badlogic.gdx.utils.Array;
import com.badlogic.gdx.utils.Json;
import com.badlogic.gdx.utils.SerializationException;
import com.badlogic.gdx.utils.Json.Serializer;
import com.badlogic.gdx.utils.reflect.ClassReflection;
import com.badlogic.gdx.utils.reflect.ReflectionException;
import com.badlogic.gdx.utils.JsonValue;
import com.egysoft.gdx.assets.EntityBuilder;

/**
 * @author egyware
 *
 */
public class EntityBuilderLoader extends SynchronousAssetLoader<EntityBuilder, EntityBuilderLoader.EntityBuilderParameter>
{
    public static Json json = new Json();
    static
    {
        json.setSerializer(EntityBuilder.class, new EntityBuilderSerializer());
    }
    public EntityBuilderLoader(FileHandleResolver resolver)
    {
        super(resolver);
    }

    @Override
    @SuppressWarnings("rawtypes")
    public Array<AssetDescriptor> getDependencies(String fileName, FileHandle file, EntityBuilderParameter parameter)
    {
        return null;
    }

    @Override
    public EntityBuilder load(AssetManager assetManager, String fileName, FileHandle file, EntityBuilderParameter parameter)
    {
        return json.fromJson(EntityBuilder.class, file);
    }

    public static class EntityBuilderParameter extends AssetLoaderParameters<EntityBuilder>
    {
        //TODO nada todavía por diseñar :D
    }


    @SuppressWarnings("rawtypes")
    private static class EntityBuilderSerializer implements Serializer<EntityBuilder>
    {
        @Override
        public void write(Json json, EntityBuilder object,  Class knownType)
        {
        }

        @Override
        public EntityBuilder read(Json json, JsonValue jsonData, Class type)
        {
            EntityBuilder entityBuilder = new EntityBuilder();
            json.readField(entityBuilder, "defaultValue", jsonData);
            json.readField(entityBuilder, "name", jsonData);

            JsonValue behaviorsData = jsonData.get("behaviors");
            BehaviorTemplate behaviors[] = new BehaviorTemplate[behaviorsData.size];
            int index = 0;
            for(JsonValue behavior:behaviorsData)
            {
                try
                {
                    String className = String.format("com.apollo.behaviors.%sBehavior$Template", behavior.name);
                    Class<?> classType = ClassReflection.forName(className);
                    behaviors[index++] = (BehaviorTemplate) json.readValue(classType, behavior);
                }
                catch (ReflectionException ex)
                {
                    throw new SerializationException(ex);
                }
            }
            entityBuilder.behaviors = behaviors;

            return entityBuilder;
        }
    }

}