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/*******************************************************************************
 * Copyright 2011 See AUTHORS file.
 * 
 * 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 com.badlogic.gdx.assets.loaders;

import org.omg.Dynamic.Parameter;

import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.assets.AssetDescriptor;
import com.badlogic.gdx.assets.AssetLoaderParameters;
import com.badlogic.gdx.assets.AssetManager;
import com.badlogic.gdx.assets.loaders.TextureLoader.TextureParameter;
import com.badlogic.gdx.graphics.Texture;
import com.badlogic.gdx.graphics.Texture.TextureFilter;
import com.badlogic.gdx.graphics.g2d.BitmapFont;
import com.badlogic.gdx.scenes.scene2d.ui.Skin;
import com.badlogic.gdx.utils.Array;

/** 
 * {@link AssetLoader} for {@link Skin} instances. All {@link Texture} and {@link BitmapFont} instances
 * will be loaded as dependencies. Passing a {@link SkinParameter} allows one to specify the exact
 * name of the texture associated with the skin. Otherwise the skin texture is looked up just as 
 * with a call to {@link Skin#Skin(com.badlogic.gdx.files.FileHandle)}.
 * @author Nathan Sweet */
public class SkinLoader extends AsynchronousAssetLoader {
	public SkinLoader (FileHandleResolver resolver) {
		super(resolver);
	}

	@Override
	public Array getDependencies (String fileName, SkinParameter parameter) {
		Array deps = new Array();
		TextureParameter textureParam = new TextureParameter();
		textureParam.minFilter = TextureFilter.Linear;
		textureParam.magFilter = TextureFilter.Linear;
		if (parameter == null)
			deps.add(new AssetDescriptor(resolve(fileName).pathWithoutExtension() + ".png", Texture.class, textureParam));
		else
			deps.add(new AssetDescriptor(parameter.texturePath, Texture.class, textureParam));
		return deps;
	}

	@Override
	public void loadAsync (AssetManager manager, String fileName, SkinParameter parameter) {
	}

	@Override
	public Skin loadSync (AssetManager manager, String fileName, SkinParameter parameter) {
		String texturePath;
		if (parameter == null)
			texturePath = resolve(fileName).pathWithoutExtension() + ".png";
		else
			texturePath = parameter.texturePath;
		Texture texture = manager.get(texturePath, Texture.class);
		return new Skin(resolve(fileName), texture);
	}

	static public class SkinParameter extends AssetLoaderParameters {
		public final String texturePath;

		public SkinParameter (String texturePath) {
			this.texturePath = texturePath;
		}
	}
}