package com.gnarly.engine.components;

import com.gnarly.engine.utils.Library;

public class Animation {

	int curFrame, numFrames;
	float pastTime, curTime, mspf;
	boolean play, loop;
	Texture[] frames;
	
	public Animation(String name, String type, int numFrames, int fps, boolean loop) {
		this.numFrames = numFrames;
		this.loop = loop;
		play = true;
		mspf = 1000.0f / (float) fps;
		pastTime = System.nanoTime() / 1000000.0f;
		frames = new Texture[numFrames];
		for (int i = 0; i < frames.length; i++)
			frames[i] = Library.getTexture(name + " " + (i + 1) + "." + type);
	}
	
	public Animation(String name) {
		frames = new Texture[1];
		frames[0] = Library.getTexture(name);
	}
	
	public void update() {
		if(frames.length > 1) {
			curTime = System.nanoTime() / 1000000.0f;
			while(play && curTime - pastTime > mspf) {
				if(curFrame != frames.length - 1)
					++curFrame;
				else if(loop)
					curFrame = 0;
				else
					pause();
				pastTime += mspf;
			}
		}
	}
	
	public int getWidth() {
		return frames[curFrame].getWidth();
	}
	
	public int getHeight() {
		return frames[curFrame].getHeight();
	}
	
	public void pause() {
		play = false;
	}
	
	public void play() {
		if(!play) {
			pastTime = System.nanoTime() / 1000000.0f;
			play = true;
		}
	}
	
	public void reset() {
		curFrame = 0;
		pastTime = System.nanoTime() / 1000000.0f;
	}
	
	public void bind() {
		frames[curFrame].bind();
	}
	
	public void unbind() {
		frames[curFrame].unbind();
	}
}