package electroblob.wizardry.client.particle;

import org.lwjgl.opengl.GL11;

import electroblob.wizardry.Wizardry;
import electroblob.wizardry.spell.Clairvoyance;
import net.minecraft.client.renderer.GlStateManager;
import net.minecraft.client.renderer.OpenGlHelper;
import net.minecraft.util.ResourceLocation;
import net.minecraft.world.World;
import net.minecraftforge.fml.relauncher.Side;
import net.minecraftforge.fml.relauncher.SideOnly;

@SideOnly(Side.CLIENT)
public class ParticlePath extends ParticleCustomTexture {
	
	private static final ResourceLocation TEXTURE = new ResourceLocation(Wizardry.MODID, "textures/particle/path_particles.png");
	    
    private final double originX, originY, originZ;

    public ParticlePath(World world, double x, double y, double z, double vx, double vy, double vz, float r, float g, float b){
		super(world, x, y, z, vx, vy, vz);
		this.setRBGColorF(r, g, b);
        this.originX = x;
        this.originY = y;
        this.originZ = z;
	}

	public ParticlePath(World world, double x, double y, double z, double vx, double vy, double vz, float r, float g, float b, int maxAge){
		super(world, x, y, z, vx, vy, vz, maxAge);
		this.setRBGColorF(r, g, b);
        this.originX = x;
        this.originY = y;
        this.originZ = z;
	}
    
    @Override
    public void init(){
    	this.setParticleTextureIndex(0);
        // Set to a constant to remove the randomness from Particle.
        this.particleScale = 1.25f;
        this.particleGravity = 0;
        this.fullBrightness = true;
		this.canCollide = false;
    }

	@Override public ResourceLocation getTexture(){ return TEXTURE; }
	@Override protected int getXFrames(){ return 1; }
	@Override protected int getYFrames(){ return 1; }

	@Override
    public void onUpdate(){
		
		this.prevPosX = this.posX;
        this.prevPosY = this.posY;
        this.prevPosZ = this.posZ;

        if (this.particleAge++ >= this.particleMaxAge)
        {
            this.setExpired();
        }

        this.moveEntity(this.motionX, this.motionY, this.motionZ);
		
        // Fading
        if(this.particleAge > this.particleMaxAge / 2){
            this.setAlphaF(1.0F - 2 * (((float)this.particleAge - (float)(this.particleMaxAge / 2)) / (float)this.particleMaxAge));
        }
        
        if(this.particleAge % Clairvoyance.PARTICLE_MOVEMENT_INTERVAL == 0){
        	this.setPosition(this.originX, this.originY, this.originZ);
            this.prevPosX = this.posX;
            this.prevPosY = this.posY;
            this.prevPosZ = this.posZ;
        }
        
    }
    
    @Override
    public void applyGLStateChanges(){
    	GlStateManager.enableBlend();
    	GlStateManager.blendFunc(GL11.GL_SRC_ALPHA, GL11.GL_ONE_MINUS_SRC_ALPHA);
    	// TESTME: Are these two actually necessary?
    	GlStateManager.disableLighting();
        OpenGlHelper.setLightmapTextureCoords(OpenGlHelper.lightmapTexUnit, 240, 240);
    }
    
    @Override
    public void undoGLStateChanges(){
    	GlStateManager.disableBlend();
    	GlStateManager.enableLighting();
    }
}