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/*******************************************************************************
 * 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.util;

import static com.badlogic.gdx.scenes.scene2d.actions.Actions.fadeOut;
import static com.badlogic.gdx.scenes.scene2d.actions.Actions.sequence;

import com.badlogic.gdx.math.Interpolation;
import com.badlogic.gdx.math.Vector2;
import com.badlogic.gdx.math.Vector3;
import com.badlogic.gdx.scenes.scene2d.Stage;
import com.badlogic.gdx.scenes.scene2d.actions.Actions;
import com.badlogic.gdx.scenes.scene2d.ui.Label;
import com.badlogic.gdx.scenes.scene2d.ui.Skin;
import com.badlogic.gdx.utils.Align;
import com.badlogic.gdx.utils.viewport.Viewport;
import com.bladecoder.engine.model.InteractiveActor;
import com.bladecoder.engine.model.Text;
import com.bladecoder.engine.model.TextManager;
import com.bladecoder.engine.model.Verb;
import com.bladecoder.engine.model.World;

public class UIUtils {
	private final static Vector3 unprojectTmp = new Vector3();
	private final static Vector2 unproject2Tmp = new Vector2();

	public static void showUIText(Stage stage, Skin skin, World w, Text t) {
		// Type UI texts will show at the same time that TextManagerUI texts.

		String style = t.style == null ? "ui-text" : t.style;
		Label msg = new Label(t.str, skin, style);

		msg.setWrap(true);
		msg.setAlignment(Align.center, Align.center);

		if (t.color != null)
			msg.setColor(t.color);

		msg.setSize(msg.getWidth() + DPIUtils.getMarginSize() * 2, msg.getHeight() + DPIUtils.getMarginSize() * 2);

		stage.addActor(msg);
		unprojectTmp.set(t.x, t.y, 0);
		w.getSceneCamera().scene2screen(stage.getViewport(), unprojectTmp);

		float posx, posy;

		if (t.x == TextManager.POS_CENTER) {
			posx = (stage.getViewport().getScreenWidth() - msg.getWidth()) / 2;
		} else if (t.x == TextManager.POS_SUBTITLE) {
			posx = DPIUtils.getMarginSize();
		} else {
			posx = unprojectTmp.x;
		}

		if (t.y == TextManager.POS_CENTER) {
			posy = (stage.getViewport().getScreenHeight() - msg.getHeight()) / 2;
		} else if (t.y == TextManager.POS_SUBTITLE) {
			posy = stage.getViewport().getScreenHeight() - msg.getHeight() - DPIUtils.getMarginSize() * 3;
		} else {
			posy = unprojectTmp.y;
		}

		msg.setPosition(posx, posy);
		msg.getColor().a = 0;
		msg.addAction(sequence(Actions.fadeIn(0.4f, Interpolation.fade),
				Actions.delay(t.time, sequence(fadeOut(0.4f, Interpolation.fade), Actions.removeActor()))));
	}

	/**
	 * Calcs the rotation based in the actor screen position
	 */
	public static float calcLeaveArrowRotation(Viewport viewport, InteractiveActor actor) {
		Verb verb = actor.getVerb(Verb.LEAVE_VERB);

		if (verb == null || verb.getIcon() == null) {

			actor.getBBox().getBoundingRectangle().getCenter(unproject2Tmp);

			if (unproject2Tmp.x < viewport.getWorldWidth() / 3f) {
				return 180; // LEFT
			}

			if (unproject2Tmp.x > viewport.getWorldWidth() / 3f * 2f) {
				return 0; // RIGHT
			}

			if (unproject2Tmp.y < viewport.getWorldHeight() / 5f) {
				return -90; // DOWN
			}

			return 90; // UP
		} else {
			String dir = verb.getIcon();

			if (dir.equals("left")) {
				return 180; // LEFT
			}

			if (dir.equals("right")) {
				return 0; // RIGHT
			}

			if (dir.equals("down")) {
				return -90; // DOWN
			}

			return 90; // UP
		}
	}

}