package projectzombie.menu.gui;

import gl_engine.matrix.Matrix4;
import gl_engine.vec.Vec2d;
import projectzombie.Main;
import projectzombie.init.Models;
import projectzombie.input.InputMode;
import projectzombie.model.Model;
import projectzombie.text.Text;
import projectzombie.util.gl.GlHelpers;

public class Button implements GUIComponent, GUISelectable
{
	private Vec2d pos = new Vec2d(0, 0);
	private String text = "";
	private Alignment alignment = Alignment.CENTRE;
	
	private boolean selected = false;
	
	private GUISelectable[] SELECTABLE = {null, null, null, null};
	
	public static final Vec2d textSize = new Vec2d(0.5, 0.5);
	
	public void setPos(Vec2d pos) {
		this.pos = pos;
	}
	
	public void setText(String text) {
		this.text = text;
	}
	
	public void setAlign(Alignment alignment) {
		this.alignment = alignment;
	}

	@Override
	public void render(Vec2d mousePos)
	{
		double m = 3;
		double w = textSize.x * m * 8;
		double h = textSize.x * m / 2;
		
		double w1 = 0;
		double w2 = 0;
		double wt = 0;
		
		if(alignment == Alignment.LEFT) {
			w1 = 0;
			w2 = w;
			wt = w/2;
		}
		
		if(alignment == Alignment.CENTRE) {
			w1 = -w/2;
			w2 = w/2;
			wt = 0;
		}
		
		if(alignment == Alignment.RIGHT) {
			w1 = -w;
			w2 = 0;
			wt = -w/2;
		}
		
		Model model;
		boolean mouseHover = InputMode.Controller ? this.selected : this.checkMouseHover(mousePos);
		if(mouseHover) {
			model = Models.UI_BUTTON_HOVER;
		} else {
			model = Models.UI_BUTTON;
		}
		
		Matrix4 matrix = Matrix4.translate(pos.x, pos.y, 0);
		
		model.bind();
		model.render();
		
		if(mouseHover) {
			//GlHelpers.color3(0.8, 0.8, 0.8);
		} else {
			//GlHelpers.color3(0.68, 0.68, 0.68);
		}
		//Text.render(text, textSize);
	}

	@Override
	public boolean checkMouseHover(Vec2d pos) {
		
		double mx = pos.x / Main.window.getWidth() * 20 - 10;
		double my = pos.y / Main.window.getHeight() * 20 - 10;
		
		mx = mx * GlHelpers.getScale() / 10;
		my = my * GlHelpers.getScale() / 10;
		
		double m = 3;
		double w = textSize.x * m * 8 / GlHelpers.getAspectRatio();
		double h = textSize.x * m / 2;
		
		double w1 = 0;
		double w2 = 0;
		
		if(alignment == Alignment.LEFT) {
			w1 = 0;
			w2 = w;
		}
		
		if(alignment == Alignment.CENTRE) {
			w1 = -w/2;
			w2 = w/2;
		}
		
		if(alignment == Alignment.RIGHT) {
			w1 = -w;
			w2 = 0;
		}
		
		return (
				mx > w1 + this.pos.x &&
				mx < w2 + this.pos.x &&
				my > -h - this.pos.y &&
				my <  h - this.pos.y);
	}

	@Override
	public void onMouseClick(Vec2d pos) {
	}
	
	@Override
	public void onBack() {
	}

	@Override
	public void setSelected(boolean status) {
		this.selected = status;
	}

	@Override
	public boolean getSelected() {
		return this.selected;
	}

	@Override
	public GUISelectable getNeighbour(GUISelectableDirection direction) {
		if(direction == GUISelectableDirection.UP) {
			return SELECTABLE[0];
		}
		if(direction == GUISelectableDirection.LEFT) {
			return SELECTABLE[1];
		}
		if(direction == GUISelectableDirection.DOWN) {
			return SELECTABLE[2];
		}
		if(direction == GUISelectableDirection.RIGHT) {
			return SELECTABLE[3];
		}
		
		return null;
	}
	
	@Override
	public void setNeighbour(GUISelectable selectable, GUISelectableDirection direction) {
		if(direction == GUISelectableDirection.UP) {
			SELECTABLE[0] = selectable;
		}
		if(direction == GUISelectableDirection.LEFT) {
			SELECTABLE[1] = selectable;
		}
		if(direction == GUISelectableDirection.DOWN) {
			SELECTABLE[2] = selectable;
		}
		if(direction == GUISelectableDirection.RIGHT) {
			SELECTABLE[3] = selectable;
		}
	}
	
	@Override
	public void onActivate() {
		if(this.selected) {
			this.onMouseClick(new Vec2d(0, 0));
		}
	}
}