package game.renderer.particle;

import java.util.List;
import java.util.Map;

import com.google.common.collect.Lists;
import com.google.common.collect.Maps;

import game.block.Block;
import game.entity.Entity;
import game.material.Material;
import game.renderer.ActiveRenderInfo;
import game.renderer.DefaultVertexFormats;
import game.renderer.GlState;
import game.renderer.RenderBuffer;
import game.renderer.Tessellator;
import game.renderer.texture.TextureManager;
import game.renderer.texture.TextureMap;
import game.rng.Random;
import game.util.ExtMath;
import game.world.BlockPos;
import game.world.Facing;
import game.world.State;
import game.world.World;

public class EffectRenderer
{
	public static final String particleTextures = "textures/world/particles.png";

    /** Reference to the World object. */
    protected World worldObj;
    private List<EntityFX>[][] fxLayers = new List[4][];
    private List<EntityParticleEmitter> particleEmitters = Lists.<EntityParticleEmitter>newArrayList();
    private TextureManager renderer;

    /** RNG. */
    private Random rand = new Random();
    private Map<Integer, IParticleFactory> particleTypes = Maps.<Integer, IParticleFactory>newHashMap();

    public EffectRenderer(World worldIn, TextureManager rendererIn)
    {
        this.worldObj = worldIn;
        this.renderer = rendererIn;

        for (int i = 0; i < 4; ++i)
        {
            this.fxLayers[i] = new List[2];

            for (int j = 0; j < 2; ++j)
            {
                this.fxLayers[i][j] = Lists.newArrayList();
            }
        }

        this.registerVanillaParticles();
    }

    private void registerVanillaParticles()
    {
        this.registerParticle(ParticleType.EXPLOSION_NORMAL.getParticleID(), new EntityExplodeFX.Factory());
        this.registerParticle(ParticleType.WATER_BUBBLE.getParticleID(), new EntityBubbleFX.Factory());
        this.registerParticle(ParticleType.WATER_SPLASH.getParticleID(), new EntitySplashFX.Factory());
        this.registerParticle(ParticleType.WATER_WAKE.getParticleID(), new EntityFishWakeFX.Factory());
        this.registerParticle(ParticleType.WATER_DROP.getParticleID(), new EntityDownfallFX.RainFactory());
        this.registerParticle(ParticleType.SUSPENDED.getParticleID(), new EntitySuspendFX.Factory());
        this.registerParticle(ParticleType.SUSPENDED_DEPTH.getParticleID(), new EntityAuraFX.SuspendFactory());
        this.registerParticle(ParticleType.CRIT.getParticleID(), new EntityCrit2FX.Factory());
        this.registerParticle(ParticleType.CRIT_MAGIC.getParticleID(), new EntityCrit2FX.MagicFactory());
        this.registerParticle(ParticleType.SMOKE_NORMAL.getParticleID(), new EntitySmokeFX.Factory());
        this.registerParticle(ParticleType.SMOKE_LARGE.getParticleID(), new EntityCritFX.Factory());
        this.registerParticle(ParticleType.SPELL.getParticleID(), new EntitySpellParticleFX.Factory());
        this.registerParticle(ParticleType.SPELL_INSTANT.getParticleID(), new EntitySpellParticleFX.InstantFactory());
        this.registerParticle(ParticleType.SPELL_MOB.getParticleID(), new EntitySpellParticleFX.MobFactory());
        this.registerParticle(ParticleType.SPELL_MOB_AMBIENT.getParticleID(), new EntitySpellParticleFX.AmbientMobFactory());
        this.registerParticle(ParticleType.SPELL_WITCH.getParticleID(), new EntitySpellParticleFX.WitchFactory());
        this.registerParticle(ParticleType.DRIP_WATER.getParticleID(), new EntityDropParticleFX.WaterFactory());
        this.registerParticle(ParticleType.DRIP_LAVA.getParticleID(), new EntityDropParticleFX.LavaFactory());
//        this.registerParticle(EnumParticleTypes.VILLAGER_ANGRY.getParticleID(), new EntityHeartFX.AngryVillagerFactory());
        this.registerParticle(ParticleType.GROW.getParticleID(), new EntityAuraFX.GrowFactory());
        this.registerParticle(ParticleType.TOWN_AURA.getParticleID(), new EntityAuraFX.Factory());
        this.registerParticle(ParticleType.NOTE.getParticleID(), new EntityNoteFX.Factory());
        this.registerParticle(ParticleType.PORTAL.getParticleID(), new EntityPortalFX.Factory());
        this.registerParticle(ParticleType.ENCHANTMENT_TABLE.getParticleID(), new EntityEnchantmentTableParticleFX.EnchantmentTable());
        this.registerParticle(ParticleType.FLAME.getParticleID(), new EntityFlameFX.Factory());
        this.registerParticle(ParticleType.LAVA.getParticleID(), new EntityLavaFX.Factory());
        this.registerParticle(ParticleType.FOOTSTEP.getParticleID(), new EntityFootStepFX.Factory());
        this.registerParticle(ParticleType.CLOUD.getParticleID(), new EntityCloudFX.Factory());
        this.registerParticle(ParticleType.REDSTONE.getParticleID(), new EntityReddustFX.Factory());
        this.registerParticle(ParticleType.SNOWBALL.getParticleID(), new EntityBreakingFX.SnowballFactory());
        this.registerParticle(ParticleType.SNOW_SHOVEL.getParticleID(), new EntitySnowShovelFX.Factory());
        this.registerParticle(ParticleType.SLIME.getParticleID(), new EntityBreakingFX.SlimeFactory());
        this.registerParticle(ParticleType.HEART.getParticleID(), new EntityHeartFX.Factory());
//        this.registerParticle(EnumParticleTypes.BARRIER.getParticleID(), new Barrier.Factory());
        this.registerParticle(ParticleType.ITEM_CRACK.getParticleID(), new EntityBreakingFX.Factory());
        this.registerParticle(ParticleType.BLOCK_CRACK.getParticleID(), new EntityDiggingFX.Factory());
        this.registerParticle(ParticleType.BLOCK_DUST.getParticleID(), new EntityBlockDustFX.Factory());
        this.registerParticle(ParticleType.EXPLOSION_HUGE.getParticleID(), new EntityHugeExplodeFX.Factory());
        this.registerParticle(ParticleType.EXPLOSION_LARGE.getParticleID(), new EntityLargeExplodeFX.Factory());
        this.registerParticle(ParticleType.FIREWORKS_SPARK.getParticleID(), new EntityFirework.Factory());
        this.registerParticle(ParticleType.HAIL_CORN.getParticleID(), new EntityDownfallFX.HailFactory());
    }

    public void registerParticle(int id, IParticleFactory particleFactory)
    {
        this.particleTypes.put(Integer.valueOf(id), particleFactory);
    }

    public void emitParticleAtEntity(Entity entityIn, ParticleType particleTypes)
    {
        this.particleEmitters.add(new EntityParticleEmitter(this.worldObj, entityIn, particleTypes));
    }

    /**
     * Spawns the relevant particle according to the particle id.
     *  
     * @param xCoord X position of the particle
     * @param yCoord Y position of the particle
     * @param zCoord Z position of the particle
     * @param xSpeed X speed of the particle
     * @param ySpeed Y speed of the particle
     * @param zSpeed Z speed of the particle
     * @param parameters Parameters for the particle (color for redstone, ...)
     */
    public EntityFX spawnEffectParticle(int particleId, double xCoord, double yCoord, double zCoord, double xSpeed, double ySpeed, double zSpeed, int[] parameters)
    {
        IParticleFactory iparticlefactory = (IParticleFactory)this.particleTypes.get(Integer.valueOf(particleId));

        if (iparticlefactory != null)
        {
            EntityFX entityfx = iparticlefactory.getEntityFX(particleId, this.worldObj, xCoord, yCoord, zCoord, xSpeed, ySpeed, zSpeed, parameters);

            if (entityfx != null)
            {
                this.addEffect(entityfx);
                return entityfx;
            }
        }

        return null;
    }

    public void addEffect(EntityFX effect)
    {
        int i = effect.getFXLayer();
        int j = effect.getAlpha() != 1.0F ? 0 : 1;

        if (this.fxLayers[i][j].size() >= 4000)
        {
            this.fxLayers[i][j].remove(0);
        }

        this.fxLayers[i][j].add(effect);
    }

    public void updateEffects()
    {
        for (int i = 0; i < 4; ++i)
        {
            this.updateEffectLayer(i);
        }

        List<EntityParticleEmitter> list = Lists.<EntityParticleEmitter>newArrayList();

        for (EntityParticleEmitter entityparticleemitter : this.particleEmitters)
        {
            entityparticleemitter.onUpdate();

            if (entityparticleemitter.dead)
            {
                list.add(entityparticleemitter);
            }
        }

        this.particleEmitters.removeAll(list);
    }

    private void updateEffectLayer(int layer)
    {
        for (int i = 0; i < 2; ++i)
        {
            this.updateEffectAlphaLayer(this.fxLayers[layer][i]);
        }
    }

    private void updateEffectAlphaLayer(List<EntityFX> entitiesFX)
    {
        List<EntityFX> list = Lists.<EntityFX>newArrayList();

        for (int i = 0; i < entitiesFX.size(); ++i)
        {
            EntityFX entityfx = (EntityFX)entitiesFX.get(i);
            this.tickParticle(entityfx);

            if (entityfx.dead)
            {
                list.add(entityfx);
            }
        }

        entitiesFX.removeAll(list);
    }

    private void tickParticle(final EntityFX particle)
    {
        particle.onUpdate();
    }

    /**
     * Renders all current particles. Args player, partialTickTime
     */
    public void renderParticles(Entity entityIn, float partialTicks)
    {
        float f = ActiveRenderInfo.getRotationX();
        float f1 = ActiveRenderInfo.getRotationZ();
        float f2 = ActiveRenderInfo.getRotationYZ();
        float f3 = ActiveRenderInfo.getRotationXY();
        float f4 = ActiveRenderInfo.getRotationXZ();
        EntityFX.interpPosX = entityIn.lastTickPosX + (entityIn.posX - entityIn.lastTickPosX) * (double)partialTicks;
        EntityFX.interpPosY = entityIn.lastTickPosY + (entityIn.posY - entityIn.lastTickPosY) * (double)partialTicks;
        EntityFX.interpPosZ = entityIn.lastTickPosZ + (entityIn.posZ - entityIn.lastTickPosZ) * (double)partialTicks;
        GlState.enableBlend();
        GlState.blendFunc(770, 771);
        GlState.alphaFunc(516, 0.003921569F);

        for (int i = 0; i < 3; ++i)
        {
            for (int j = 0; j < 2; ++j)
            {
                final int i_f = i;

                if (!this.fxLayers[i][j].isEmpty())
                {
                    switch (j)
                    {
                        case 0:
                            GlState.depthMask(false);
                            break;

                        case 1:
                            GlState.depthMask(true);
                    }

                    switch (i)
                    {
                        case 0:
                        default:
                            this.renderer.bindTexture(particleTextures);
                            break;

                        case 1:
                            this.renderer.bindTexture(TextureMap.locationBlocksTexture);
                    }

                    GlState.color(1.0F, 1.0F, 1.0F, 1.0F);
//                    Tessellator tessellator = Tessellator.getInstance();
                    RenderBuffer worldrenderer = Tessellator.getBuffer();
                    worldrenderer.begin(7, DefaultVertexFormats.PARTICLE_POSITION_TEX_COLOR_LMAP);

                    for (int k = 0; k < this.fxLayers[i][j].size(); ++k)
                    {
                        final EntityFX entityfx = (EntityFX)this.fxLayers[i][j].get(k);

                        entityfx.renderParticle(worldrenderer, entityIn, partialTicks, f, f4, f1, f2, f3);
                    }

                    Tessellator.draw();
                }
            }
        }

        GlState.depthMask(true);
        GlState.disableBlend();
        GlState.alphaFunc(516, 0.1F);
    }

    public void renderLitParticles(Entity entityIn, float partialTick)
    {
        float f = 0.017453292F;
        float f1 = ExtMath.cos(entityIn.rotYaw * 0.017453292F);
        float f2 = ExtMath.sin(entityIn.rotYaw * 0.017453292F);
        float f3 = -f2 * ExtMath.sin(entityIn.rotPitch * 0.017453292F);
        float f4 = f1 * ExtMath.sin(entityIn.rotPitch * 0.017453292F);
        float f5 = ExtMath.cos(entityIn.rotPitch * 0.017453292F);

        for (int i = 0; i < 2; ++i)
        {
            List<EntityFX> list = this.fxLayers[3][i];

            if (!list.isEmpty())
            {
//                Tessellator tessellator = Tessellator.getInstance();
                RenderBuffer worldrenderer = Tessellator.getBuffer();

                for (int j = 0; j < list.size(); ++j)
                {
                    EntityFX entityfx = (EntityFX)list.get(j);
                    entityfx.renderParticle(worldrenderer, entityIn, partialTick, f1, f5, f2, f3, f4);
                }
            }
        }
    }

    public void clearEffects(World worldIn)
    {
        this.worldObj = worldIn;

        for (int i = 0; i < 4; ++i)
        {
            for (int j = 0; j < 2; ++j)
            {
                this.fxLayers[i][j].clear();
            }
        }

        this.particleEmitters.clear();
    }

    public void addBlockDestroyEffects(BlockPos pos, State state)
    {
        if (state.getBlock().getMaterial() != Material.air)
        {
            state = state.getBlock().getActualState(state, this.worldObj, pos);
            int i = 4;

            for (int j = 0; j < i; ++j)
            {
                for (int k = 0; k < i; ++k)
                {
                    for (int l = 0; l < i; ++l)
                    {
                        double d0 = (double)pos.getX() + ((double)j + 0.5D) / (double)i;
                        double d1 = (double)pos.getY() + ((double)k + 0.5D) / (double)i;
                        double d2 = (double)pos.getZ() + ((double)l + 0.5D) / (double)i;
                        this.addEffect((new EntityDiggingFX(this.worldObj, d0, d1, d2, d0 - (double)pos.getX() - 0.5D, d1 - (double)pos.getY() - 0.5D, d2 - (double)pos.getZ() - 0.5D, state)).setBlockPos(pos));
                    }
                }
            }
        }
    }

    /**
     * Adds block hit particles for the specified block
     */
    public void addBlockHitEffects(BlockPos pos, Facing side)
    {
        State iblockstate = this.worldObj.getState(pos);
        Block block = iblockstate.getBlock();

        if (block.getRenderType() != -1)
        {
            int i = pos.getX();
            int j = pos.getY();
            int k = pos.getZ();
            float f = 0.1F;
            double d0 = (double)i + this.rand.doublev() * (block.getBlockBoundsMaxX() - block.getBlockBoundsMinX() - (double)(f * 2.0F)) + (double)f + block.getBlockBoundsMinX();
            double d1 = (double)j + this.rand.doublev() * (block.getBlockBoundsMaxY() - block.getBlockBoundsMinY() - (double)(f * 2.0F)) + (double)f + block.getBlockBoundsMinY();
            double d2 = (double)k + this.rand.doublev() * (block.getBlockBoundsMaxZ() - block.getBlockBoundsMinZ() - (double)(f * 2.0F)) + (double)f + block.getBlockBoundsMinZ();

            if (side == Facing.DOWN)
            {
                d1 = (double)j + block.getBlockBoundsMinY() - (double)f;
            }

            if (side == Facing.UP)
            {
                d1 = (double)j + block.getBlockBoundsMaxY() + (double)f;
            }

            if (side == Facing.NORTH)
            {
                d2 = (double)k + block.getBlockBoundsMinZ() - (double)f;
            }

            if (side == Facing.SOUTH)
            {
                d2 = (double)k + block.getBlockBoundsMaxZ() + (double)f;
            }

            if (side == Facing.WEST)
            {
                d0 = (double)i + block.getBlockBoundsMinX() - (double)f;
            }

            if (side == Facing.EAST)
            {
                d0 = (double)i + block.getBlockBoundsMaxX() + (double)f;
            }

            this.addEffect((new EntityDiggingFX(this.worldObj, d0, d1, d2, 0.0D, 0.0D, 0.0D, iblockstate)).setBlockPos(pos).multiplyVelocity(0.2F).multipleParticleScaleBy(0.6F));
        }
    }

    public void moveToAlphaLayer(EntityFX effect)
    {
        this.moveToLayer(effect, 1, 0);
    }

    public void moveToNoAlphaLayer(EntityFX effect)
    {
        this.moveToLayer(effect, 0, 1);
    }

    private void moveToLayer(EntityFX effect, int layerFrom, int layerTo)
    {
        for (int i = 0; i < 4; ++i)
        {
            if (this.fxLayers[i][layerFrom].contains(effect))
            {
                this.fxLayers[i][layerFrom].remove(effect);
                this.fxLayers[i][layerTo].add(effect);
            }
        }
    }

    public String getStatistics()
    {
        int i = 0;

        for (int j = 0; j < 4; ++j)
        {
            for (int k = 0; k < 2; ++k)
            {
                i += this.fxLayers[j][k].size();
            }
        }

        return "" + i;
    }
}