/*******************************************************************************
 * 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.tests;

import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.graphics.GL20;
import com.badlogic.gdx.graphics.Texture;
import com.badlogic.gdx.graphics.g2d.Animation;
import com.badlogic.gdx.graphics.g2d.SpriteBatch;
import com.badlogic.gdx.graphics.g2d.TextureRegion;
import com.badlogic.gdx.math.Vector2;
import com.badlogic.gdx.tests.utils.GdxTest;

public class SimpleAnimationTest extends GdxTest {
	private Animation<TextureRegion> currentWalk;
	private float currentFrameTime;
	private Vector2 position;

	private Texture texture;

	private Animation<TextureRegion> downWalk;
	private Animation<TextureRegion> leftWalk;
	private Animation<TextureRegion> rightWalk;
	private Animation<TextureRegion> upWalk;

	private SpriteBatch spriteBatch;

	private static final float ANIMATION_SPEED = 0.2f;

	@Override
	public void create () {
		Gdx.input.setInputProcessor(this);
		texture = new Texture(Gdx.files.internal("data/animation.png"));
		TextureRegion[][] regions = TextureRegion.split(texture, 32, 48);
		TextureRegion[] downWalkReg = regions[0];
		TextureRegion[] leftWalkReg = regions[1];
		TextureRegion[] rightWalkReg = regions[2];
		TextureRegion[] upWalkReg = regions[3];
		downWalk = new Animation<TextureRegion>(ANIMATION_SPEED, downWalkReg);
		leftWalk = new Animation<TextureRegion>(ANIMATION_SPEED, leftWalkReg);
		rightWalk = new Animation<TextureRegion>(ANIMATION_SPEED, rightWalkReg);
		upWalk = new Animation<TextureRegion>(ANIMATION_SPEED, upWalkReg);

		currentWalk = leftWalk;
		currentFrameTime = 0.0f;

		spriteBatch = new SpriteBatch();
		position = new Vector2();
	}

	@Override
	public void render () {
		Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
		currentFrameTime += Gdx.graphics.getDeltaTime();

		spriteBatch.begin();
		TextureRegion frame = currentWalk.getKeyFrame(currentFrameTime, true);
		spriteBatch.draw(frame, position.x, position.y);
		spriteBatch.end();
	}

	@Override
	public boolean touchDown (int x, int y, int pointer, int button) {
		position.x = x;
		position.y = Gdx.graphics.getHeight() - y;
		return true;
	}

	@Override
	public void dispose () {
		spriteBatch.dispose();
		texture.dispose();
	}
}