package com.pahimar.ee3.client.handler;

import com.pahimar.ee3.client.util.RenderUtils;
import com.pahimar.ee3.util.IOverlayItem;
import cpw.mods.fml.client.FMLClientHandler;
import cpw.mods.fml.common.eventhandler.SubscribeEvent;
import cpw.mods.fml.common.gameevent.TickEvent;
import cpw.mods.fml.relauncher.Side;
import cpw.mods.fml.relauncher.SideOnly;
import net.minecraft.client.Minecraft;
import net.minecraft.client.gui.ScaledResolution;
import net.minecraft.client.renderer.RenderHelper;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.item.ItemStack;
import org.lwjgl.opengl.GL11;
import org.lwjgl.opengl.GL12;

@SideOnly(Side.CLIENT)
public class HUDTickHandler {
    @SubscribeEvent
    public void renderTick(TickEvent.RenderTickEvent event) {
        if (event.phase == TickEvent.Phase.END) {
            Minecraft minecraft = FMLClientHandler.instance().getClient();
            EntityPlayer entityPlayer = minecraft.thePlayer;

            if (entityPlayer != null) {
                ItemStack currentItemStack = entityPlayer.inventory.getCurrentItem();
                if (Minecraft.isGuiEnabled() && minecraft.inGameHasFocus) {
                    if (currentItemStack != null
                        && currentItemStack.getItem() instanceof IOverlayItem) {
                        renderHUDOverlayItem(minecraft, entityPlayer, currentItemStack);
                    }
                }
            }
        }
    }

    private static void renderHUDOverlayItem(
        Minecraft minecraft, EntityPlayer entityPlayer, ItemStack itemStack
    ) {
        float overlayScale = 2f;
        float overlayOpacity = 1f;
        GL11.glPushMatrix();
        ScaledResolution sr = new ScaledResolution(
            minecraft, minecraft.displayWidth, minecraft.displayHeight
        );
        GL11.glClear(GL11.GL_DEPTH_BUFFER_BIT);
        GL11.glMatrixMode(GL11.GL_PROJECTION);
        GL11.glLoadIdentity();
        GL11.glOrtho(
            0.0D,
            sr.getScaledWidth_double(),
            sr.getScaledHeight_double(),
            0.0D,
            1000.0D,
            3000.0D
        );
        GL11.glMatrixMode(GL11.GL_MODELVIEW);
        GL11.glLoadIdentity();
        GL11.glTranslatef(0.0F, 0.0F, -2000.0F);
        GL11.glPushMatrix();
        RenderHelper.enableGUIStandardItemLighting();
        GL11.glDisable(GL11.GL_LIGHTING);
        GL11.glEnable(GL12.GL_RESCALE_NORMAL);
        GL11.glEnable(GL11.GL_COLOR_MATERIAL);
        GL11.glEnable(GL11.GL_LIGHTING);
        int hudOverlayX = 0;
        int hudOverlayY = 0;

        hudOverlayX = (int) (sr.getScaledWidth() - 16 * overlayScale);
        hudOverlayY = (int) (sr.getScaledHeight() - 16 * overlayScale);

        RenderUtils.renderItemIntoGUI(
            minecraft.fontRenderer,
            itemStack,
            hudOverlayX,
            hudOverlayY,
            overlayOpacity,
            overlayScale,
            -90
        );

        GL11.glDisable(GL11.GL_LIGHTING);
        GL11.glPopMatrix();
        GL11.glPopMatrix();
    }
}