/*******************************************************************************
 * Copyright 2014 Rafael Garcia Moreno.
 * 
 * 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.bladecoder.engine.ui;

import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.Input.Peripheral;
import com.badlogic.gdx.graphics.Color;
import com.badlogic.gdx.graphics.g2d.Batch;
import com.badlogic.gdx.graphics.g2d.TextureRegion;
import com.badlogic.gdx.math.Vector2;
import com.badlogic.gdx.scenes.scene2d.Actor;
import com.badlogic.gdx.scenes.scene2d.Touchable;
import com.badlogic.gdx.scenes.scene2d.ui.Skin;
import com.badlogic.gdx.utils.viewport.Viewport;
import com.bladecoder.engine.util.DPIUtils;

public class Pointer extends Actor {
	private static final String POINTER_ICON = "pointer";
	
	private TextureRegion pointerIcon;

	private final Vector2 mousepos = new Vector2();
	
	private float pointerScale;

	public Pointer(Skin skin) {
		pointerIcon = skin.getAtlas().findRegion(POINTER_ICON);
		setTouchable(Touchable.disabled);
		
		resize();
		show();
	}

	
	private void getInputUnproject(Viewport v, Vector2 out) {
		out.set(Gdx.input.getX(), Gdx.input.getY());

		v.unproject(out);
	}
	
	@Override
	public void act (float delta) {
		super.act(delta);
		
		if(getStage().getActors().get(getStage().getActors().size - 1) != this)
			toFront();
	}
	
	@Override
	public void draw(Batch batch, float alpha) {
		
		getInputUnproject(getStage().getViewport(), mousepos);
		
		setPosition(mousepos.x - getWidth() / 2, mousepos.y - getHeight() / 2);
		
		batch.setColor(Color.WHITE);
		
		batch.draw(pointerIcon, getX(), getY(), getWidth(), getHeight());
	}
	
	public void resize() {
		pointerScale = DPIUtils.getTouchMinSize() / pointerIcon.getRegionHeight() * .8f;
		setSize(pointerIcon.getRegionWidth() * pointerScale, pointerIcon.getRegionHeight() * pointerScale);
	}
	
	public void show() {	
		if(!Gdx.input.isPeripheralAvailable(Peripheral.MultitouchScreen)) {
			setVisible(true);
		} else {
			setVisible(false);
		}
	}
	
	public void hide() {
		setVisible(false);
	}
}