package electroblob.wizardry.client.renderer;

import org.lwjgl.opengl.GL11;

import electroblob.wizardry.entity.projectile.EntityMagicProjectile;
import net.minecraft.client.Minecraft;
import net.minecraft.client.renderer.BufferBuilder;
import net.minecraft.client.renderer.GlStateManager;
import net.minecraft.client.renderer.OpenGlHelper;
import net.minecraft.client.renderer.Tessellator;
import net.minecraft.client.renderer.entity.Render;
import net.minecraft.client.renderer.entity.RenderManager;
import net.minecraft.client.renderer.vertex.DefaultVertexFormats;
import net.minecraft.util.ResourceLocation;
import net.minecraftforge.fml.relauncher.Side;
import net.minecraftforge.fml.relauncher.SideOnly;

@SideOnly(Side.CLIENT)
public class RenderProjectile extends Render<EntityMagicProjectile> {

	private float scale;
	private boolean blend = false;

	private final ResourceLocation texture;

	public RenderProjectile(RenderManager renderManager, float scale, ResourceLocation texture, boolean doBlending){
		super(renderManager);
		this.scale = scale;
		this.texture = texture;
		this.blend = doBlending;
	}

	@Override
	public void doRender(EntityMagicProjectile entity, double par2, double par4, double par6, float par8, float par9){

		GlStateManager.pushMatrix();
		this.bindTexture(texture);
		GlStateManager.translate((float)par2, (float)par4, (float)par6);
		GlStateManager.enableRescaleNormal();
		if(blend){
			GlStateManager.enableBlend();
			GlStateManager.blendFunc(GL11.GL_SRC_ALPHA, GL11.GL_ONE_MINUS_SRC_ALPHA);
		}
		GlStateManager.disableLighting();
		OpenGlHelper.setLightmapTextureCoords(OpenGlHelper.lightmapTexUnit, 240f, 240f);

		float f2 = this.scale;
		GlStateManager.scale(f2 / 1.0F, f2 / 1.0F, f2 / 1.0F);

		Tessellator tessellator = Tessellator.getInstance();
		BufferBuilder buffer = tessellator.getBuffer();

		float f3 = 0.0f;
		float f4 = 1.0f;
		float f5 = 0.0f;
		float f6 = 1.0f;
		float f7 = 1.0F;
		float f8 = 0.5F;
		float f9 = 0.25F;

		// This counteracts the reverse rotation behaviour when in front f5 view.
		// Fun fact: this is a bug with vanilla too! Look at a snowball in front f5 view, for example.
		float yaw = Minecraft.getMinecraft().gameSettings.thirdPersonView == 2 ? this.renderManager.playerViewX
				: -this.renderManager.playerViewX;
		GlStateManager.rotate(180.0F - this.renderManager.playerViewY, 0.0F, 1.0F, 0.0F);
		GlStateManager.rotate(yaw, 1.0F, 0.0F, 0.0F);

		buffer.begin(GL11.GL_QUADS, DefaultVertexFormats.POSITION_TEX);
		// buffer.normal(0.0F, 1.0F, 0.0F);
		buffer.pos((double)(0.0F - f8), (double)(0.0F - f9), 0.0D).tex((double)f3, (double)f6).endVertex();
		buffer.pos((double)(f7 - f8), (double)(0.0F - f9), 0.0D).tex((double)f4, (double)f6).endVertex();
		buffer.pos((double)(f7 - f8), (double)(1.0F - f9), 0.0D).tex((double)f4, (double)f5).endVertex();
		buffer.pos((double)(0.0F - f8), (double)(1.0F - f9), 0.0D).tex((double)f3, (double)f5).endVertex();
		tessellator.draw();

		GlStateManager.disableRescaleNormal();
		if(blend){
			GlStateManager.disableBlend();
		}
		GlStateManager.enableLighting();
		GlStateManager.popMatrix();
	}

	@Override
	protected ResourceLocation getEntityTexture(EntityMagicProjectile par1Entity){
		return texture;
	}
}