package com.makersfactory.mfygps;

import java.util.Collection;
import java.util.Iterator;

import org.lwjgl.opengl.GL11;

import cpw.mods.fml.common.eventhandler.SubscribeEvent;
import cpw.mods.fml.relauncher.Side;
import cpw.mods.fml.relauncher.SideOnly;
import net.minecraft.client.Minecraft;
import net.minecraft.client.gui.Gui;
import net.minecraft.init.Items;
import net.minecraft.item.Item;
import net.minecraft.item.ItemStack;
import net.minecraft.potion.Potion;
import net.minecraft.potion.PotionEffect;
import net.minecraft.util.MathHelper;
import net.minecraft.util.ResourceLocation;
import net.minecraft.util.Vec3;
import net.minecraftforge.client.event.RenderGameOverlayEvent;
import net.minecraftforge.client.event.RenderGameOverlayEvent.ElementType;

public class GuiGPS extends Gui {

	private Minecraft mc;

	public GuiGPS(Minecraft mc) {
		super();
		this.mc = mc;
	}

	static final Item gpsItem = MFYGPS.handheldGPS;
	static final int LS = 10;
	static final int TOP = 10;
	static final int LEFT = 10;
	static final int WIDTH = 70;
	static final int HEIGHT = 44;

	@SubscribeEvent
	public void eventHandler(RenderGameOverlayEvent e) {
		ItemStack currItem = this.mc.thePlayer.getCurrentEquippedItem();
		if (currItem == null || currItem.getItem() != gpsItem) {
			return;
		}

		// Draw Background
		GL11.glColor4f(1.0F, 1.0F, 1.0F, 1.0F);
		GL11.glDisable(GL11.GL_LIGHTING);
		this.mc.renderEngine.bindTexture(new ResourceLocation("mfygps-assets:textures/gui/gps-background.png"));
		this.drawTexturedModalRect(LEFT-8, TOP-7, 0, 0, 148, 61);

		// Calculate coordinates and direction
		String l1 = "X: " + (int)this.mc.thePlayer.posX;
		String l2 = "Y: " + (int)this.mc.thePlayer.posY;
		String l3 = "Z: " + (int)this.mc.thePlayer.posZ;
		String l4 = "Heading: ";
		Vec3 look = this.mc.thePlayer.getLookVec();
		double f1 = MathHelper.cos(-mc.thePlayer.rotationYaw * 0.017453292F - (float)Math.PI);
		// +1 north, -1 south
		double f2 = MathHelper.sin(-mc.thePlayer.rotationYaw * 0.017453292F - (float)Math.PI);
		// +1 west, -1 east
		String direction = "";

		double f3 = Math.abs(f1);
		double f4 = Math.abs(f2);
		double per;

		if (f3 > f4) {
			per = (Math.floor(f3*100));
			if (f3 > 0.999) per = 100;
			direction = "";
			direction += f1 > 0 ? "North" : "South";
		}
		else {
			per = (Math.floor(f4*100));
			if (f4 > 0.999) per = 100;
			direction = "";
			direction += f2 > 0 ? "West" : "East";
		}

		direction = (per == 100 ? "Exactly " : (per > 95 ? "Mostly " : "Somewhat ")) + direction;

		// Draw coordinates and direction
		this.drawString(mc.fontRenderer, l1, LEFT, TOP, 0xff7070);
		this.drawString(mc.fontRenderer, l2, LEFT, TOP+LS, 0x3dff87);
		this.drawString(mc.fontRenderer, l3, LEFT, TOP+LS+LS, 0x758aff);
		this.drawString(mc.fontRenderer, "Direction: " + direction, LEFT, TOP+LS+LS+LS, 0xFFFFFF);
	}

}