package net.minecraft.client.particle;

import cpw.mods.fml.relauncher.Side;
import cpw.mods.fml.relauncher.SideOnly;
import net.minecraft.client.renderer.Tessellator;
import net.minecraft.entity.Entity;
import net.minecraft.nbt.NBTTagCompound;
import net.minecraft.util.Icon;
import net.minecraft.util.MathHelper;
import net.minecraft.world.World;

@SideOnly(Side.CLIENT)
public class EntityFX extends Entity
{
    protected int particleTextureIndexX;
    protected int particleTextureIndexY;
    protected float particleTextureJitterX;
    protected float particleTextureJitterY;
    protected int particleAge;
    protected int particleMaxAge;
    protected float particleScale;
    protected float particleGravity;

    /** The red amount of color. Used as a percentage, 1.0 = 255 and 0.0 = 0. */
    protected float particleRed;

    /**
     * The green amount of color. Used as a percentage, 1.0 = 255 and 0.0 = 0.
     */
    protected float particleGreen;

    /**
     * The blue amount of color. Used as a percentage, 1.0 = 255 and 0.0 = 0.
     */
    protected float particleBlue;

    /** Particle alpha */
    protected float particleAlpha;

    /** The icon field from which the given particle pulls its texture. */
    protected Icon particleIcon;
    public static double interpPosX;
    public static double interpPosY;
    public static double interpPosZ;

    protected EntityFX(World par1World, double par2, double par4, double par6)
    {
        super(par1World);
        this.particleAlpha = 1.0F;
        this.setSize(0.2F, 0.2F);
        this.yOffset = this.height / 2.0F;
        this.setPosition(par2, par4, par6);
        this.lastTickPosX = par2;
        this.lastTickPosY = par4;
        this.lastTickPosZ = par6;
        this.particleRed = this.particleGreen = this.particleBlue = 1.0F;
        this.particleTextureJitterX = this.rand.nextFloat() * 3.0F;
        this.particleTextureJitterY = this.rand.nextFloat() * 3.0F;
        this.particleScale = (this.rand.nextFloat() * 0.5F + 0.5F) * 2.0F;
        this.particleMaxAge = (int)(4.0F / (this.rand.nextFloat() * 0.9F + 0.1F));
        this.particleAge = 0;
    }

    public EntityFX(World par1World, double par2, double par4, double par6, double par8, double par10, double par12)
    {
        this(par1World, par2, par4, par6);
        this.motionX = par8 + (double)((float)(Math.random() * 2.0D - 1.0D) * 0.4F);
        this.motionY = par10 + (double)((float)(Math.random() * 2.0D - 1.0D) * 0.4F);
        this.motionZ = par12 + (double)((float)(Math.random() * 2.0D - 1.0D) * 0.4F);
        float f = (float)(Math.random() + Math.random() + 1.0D) * 0.15F;
        float f1 = MathHelper.sqrt_double(this.motionX * this.motionX + this.motionY * this.motionY + this.motionZ * this.motionZ);
        this.motionX = this.motionX / (double)f1 * (double)f * 0.4000000059604645D;
        this.motionY = this.motionY / (double)f1 * (double)f * 0.4000000059604645D + 0.10000000149011612D;
        this.motionZ = this.motionZ / (double)f1 * (double)f * 0.4000000059604645D;
    }

    public EntityFX multiplyVelocity(float par1)
    {
        this.motionX *= (double)par1;
        this.motionY = (this.motionY - 0.10000000149011612D) * (double)par1 + 0.10000000149011612D;
        this.motionZ *= (double)par1;
        return this;
    }

    public EntityFX multipleParticleScaleBy(float par1)
    {
        this.setSize(0.2F * par1, 0.2F * par1);
        this.particleScale *= par1;
        return this;
    }

    public void setRBGColorF(float par1, float par2, float par3)
    {
        this.particleRed = par1;
        this.particleGreen = par2;
        this.particleBlue = par3;
    }

    /**
     * Sets the particle alpha (float)
     */
    public void setAlphaF(float par1)
    {
        this.particleAlpha = par1;
    }

    public float getRedColorF()
    {
        return this.particleRed;
    }

    public float getGreenColorF()
    {
        return this.particleGreen;
    }

    public float getBlueColorF()
    {
        return this.particleBlue;
    }

    /**
     * returns if this entity triggers Block.onEntityWalking on the blocks they walk on. used for spiders and wolves to
     * prevent them from trampling crops
     */
    protected boolean canTriggerWalking()
    {
        return false;
    }

    protected void entityInit() {}

    /**
     * Called to update the entity's position/logic.
     */
    public void onUpdate()
    {
        this.prevPosX = this.posX;
        this.prevPosY = this.posY;
        this.prevPosZ = this.posZ;

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

        this.motionY -= 0.04D * (double)this.particleGravity;
        this.moveEntity(this.motionX, this.motionY, this.motionZ);
        this.motionX *= 0.9800000190734863D;
        this.motionY *= 0.9800000190734863D;
        this.motionZ *= 0.9800000190734863D;

        if (this.onGround)
        {
            this.motionX *= 0.699999988079071D;
            this.motionZ *= 0.699999988079071D;
        }
    }

    public void renderParticle(Tessellator par1Tessellator, float par2, float par3, float par4, float par5, float par6, float par7)
    {
        float f6 = (float)this.particleTextureIndexX / 16.0F;
        float f7 = f6 + 0.0624375F;
        float f8 = (float)this.particleTextureIndexY / 16.0F;
        float f9 = f8 + 0.0624375F;
        float f10 = 0.1F * this.particleScale;

        if (this.particleIcon != null)
        {
            f6 = this.particleIcon.getMinU();
            f7 = this.particleIcon.getMaxU();
            f8 = this.particleIcon.getMinV();
            f9 = this.particleIcon.getMaxV();
        }

        float f11 = (float)(this.prevPosX + (this.posX - this.prevPosX) * (double)par2 - interpPosX);
        float f12 = (float)(this.prevPosY + (this.posY - this.prevPosY) * (double)par2 - interpPosY);
        float f13 = (float)(this.prevPosZ + (this.posZ - this.prevPosZ) * (double)par2 - interpPosZ);
        float f14 = 1.0F;
        par1Tessellator.setColorRGBA_F(this.particleRed * f14, this.particleGreen * f14, this.particleBlue * f14, this.particleAlpha);
        par1Tessellator.addVertexWithUV((double)(f11 - par3 * f10 - par6 * f10), (double)(f12 - par4 * f10), (double)(f13 - par5 * f10 - par7 * f10), (double)f7, (double)f9);
        par1Tessellator.addVertexWithUV((double)(f11 - par3 * f10 + par6 * f10), (double)(f12 + par4 * f10), (double)(f13 - par5 * f10 + par7 * f10), (double)f7, (double)f8);
        par1Tessellator.addVertexWithUV((double)(f11 + par3 * f10 + par6 * f10), (double)(f12 + par4 * f10), (double)(f13 + par5 * f10 + par7 * f10), (double)f6, (double)f8);
        par1Tessellator.addVertexWithUV((double)(f11 + par3 * f10 - par6 * f10), (double)(f12 - par4 * f10), (double)(f13 + par5 * f10 - par7 * f10), (double)f6, (double)f9);
    }

    public int getFXLayer()
    {
        return 0;
    }

    /**
     * (abstract) Protected helper method to write subclass entity data to NBT.
     */
    public void writeEntityToNBT(NBTTagCompound par1NBTTagCompound) {}

    /**
     * (abstract) Protected helper method to read subclass entity data from NBT.
     */
    public void readEntityFromNBT(NBTTagCompound par1NBTTagCompound) {}

    public void setParticleIcon(Icon par1Icon)
    {
        if (this.getFXLayer() == 1)
        {
            this.particleIcon = par1Icon;
        }
        else
        {
            if (this.getFXLayer() != 2)
            {
                throw new RuntimeException("Invalid call to Particle.setTex, use coordinate methods");
            }

            this.particleIcon = par1Icon;
        }
    }

    /**
     * Public method to set private field particleTextureIndex.
     */
    public void setParticleTextureIndex(int par1)
    {
        if (this.getFXLayer() != 0)
        {
            throw new RuntimeException("Invalid call to Particle.setMiscTex");
        }
        else
        {
            this.particleTextureIndexX = par1 % 16;
            this.particleTextureIndexY = par1 / 16;
        }
    }

    public void nextTextureIndexX()
    {
        ++this.particleTextureIndexX;
    }

    /**
     * If returns false, the item will not inflict any damage against entities.
     */
    public boolean canAttackWithItem()
    {
        return false;
    }

    public String toString()
    {
        return this.getClass().getSimpleName() + ", Pos (" + this.posX + "," + this.posY + "," + this.posZ + "), RGBA (" + this.particleRed + "," + this.particleGreen + "," + this.particleBlue + "," + this.particleAlpha + "), Age " + this.particleAge;
    }
}
