package net.minecraft.tileentity;

import java.util.List;

import com.google.common.collect.Lists;

import net.minecraft.entity.Entity;
import net.minecraft.entity.EntityList;
import net.minecraft.entity.EntityLiving;
import net.minecraft.entity.EntityLivingBase;
import net.minecraft.entity.IEntityLivingData;
import net.minecraft.entity.item.EntityMinecart;
import net.minecraft.nbt.NBTBase;
import net.minecraft.nbt.NBTTagCompound;
import net.minecraft.nbt.NBTTagList;
import net.minecraft.util.BlockPos;
import net.minecraft.util.EnumParticleTypes;
import net.minecraft.util.StringUtils;
import net.minecraft.util.WeightedRandom;
import net.minecraft.world.World;

public abstract class MobSpawnerBaseLogic {
	/**+
	 * The delay to spawn.
	 */
	private int spawnDelay = 20;
	private String mobID = "Pig";
	/**+
	 * List of minecart to spawn.
	 */
	private final List<MobSpawnerBaseLogic.WeightedRandomMinecart> minecartToSpawn = Lists.newArrayList();
	private MobSpawnerBaseLogic.WeightedRandomMinecart randomEntity;
	private double mobRotation;
	private double prevMobRotation;
	private int minSpawnDelay = 200;
	private int maxSpawnDelay = 800;
	private int spawnCount = 4;
	private Entity cachedEntity;
	private int maxNearbyEntities = 6;
	/**+
	 * The distance from which a player activates the spawner.
	 */
	private int activatingRangeFromPlayer = 16;
	/**+
	 * The range coefficient for spawning entities around.
	 */
	private int spawnRange = 4;

	/**+
	 * Gets the entity name that should be spawned.
	 */
	private String getEntityNameToSpawn() {
		if (this.getRandomEntity() == null) {
			if (this.mobID != null && this.mobID.equals("Minecart")) {
				this.mobID = "MinecartRideable";
			}

			return this.mobID;
		} else {
			return this.getRandomEntity().entityType;
		}
	}

	public void setEntityName(String name) {
		this.mobID = name;
	}

	/**+
	 * Returns true if there's a player close enough to this mob
	 * spawner to activate it.
	 */
	private boolean isActivated() {
		BlockPos blockpos = this.getSpawnerPosition();
		return this.getSpawnerWorld().isAnyPlayerWithinRangeAt((double) blockpos.getX() + 0.5D,
				(double) blockpos.getY() + 0.5D, (double) blockpos.getZ() + 0.5D,
				(double) this.activatingRangeFromPlayer);
	}

	public void updateSpawner() {
		if (this.isActivated()) {
			BlockPos blockpos = this.getSpawnerPosition();
			double d3 = (double) ((float) blockpos.getX() + this.getSpawnerWorld().rand.nextFloat());
			double d4 = (double) ((float) blockpos.getY() + this.getSpawnerWorld().rand.nextFloat());
			double d5 = (double) ((float) blockpos.getZ() + this.getSpawnerWorld().rand.nextFloat());
			this.getSpawnerWorld().spawnParticle(EnumParticleTypes.SMOKE_NORMAL, d3, d4, d5, 0.0D, 0.0D, 0.0D,
					new int[0]);
			this.getSpawnerWorld().spawnParticle(EnumParticleTypes.FLAME, d3, d4, d5, 0.0D, 0.0D, 0.0D, new int[0]);
			if (this.spawnDelay > 0) {
				--this.spawnDelay;
			}

			this.prevMobRotation = this.mobRotation;
			this.mobRotation = (this.mobRotation + (double) (1000.0F / ((float) this.spawnDelay + 200.0F))) % 360.0D;
		}
	}

	private Entity spawnNewEntity(Entity entityIn, boolean spawn) {
		if (this.getRandomEntity() != null) {
			NBTTagCompound nbttagcompound = new NBTTagCompound();
			entityIn.writeToNBTOptional(nbttagcompound);

			for (String s : this.getRandomEntity().nbtData.getKeySet()) {
				NBTBase nbtbase = this.getRandomEntity().nbtData.getTag(s);
				nbttagcompound.setTag(s, nbtbase.copy());
			}

			entityIn.readFromNBT(nbttagcompound);
			if (entityIn.worldObj != null && spawn) {
				entityIn.worldObj.spawnEntityInWorld(entityIn);
			}

			NBTTagCompound nbttagcompound2;
			for (Entity entity = entityIn; nbttagcompound.hasKey("Riding", 10); nbttagcompound = nbttagcompound2) {
				nbttagcompound2 = nbttagcompound.getCompoundTag("Riding");
				Entity entity1 = EntityList.createEntityByName(nbttagcompound2.getString("id"), entityIn.worldObj);
				if (entity1 != null) {
					NBTTagCompound nbttagcompound1 = new NBTTagCompound();
					entity1.writeToNBTOptional(nbttagcompound1);

					for (String s1 : nbttagcompound2.getKeySet()) {
						NBTBase nbtbase1 = nbttagcompound2.getTag(s1);
						nbttagcompound1.setTag(s1, nbtbase1.copy());
					}

					entity1.readFromNBT(nbttagcompound1);
					entity1.setLocationAndAngles(entity.posX, entity.posY, entity.posZ, entity.rotationYaw,
							entity.rotationPitch);
					if (entityIn.worldObj != null && spawn) {
						entityIn.worldObj.spawnEntityInWorld(entity1);
					}

					entity.mountEntity(entity1);
				}

				entity = entity1;
			}
		} else if (entityIn instanceof EntityLivingBase && entityIn.worldObj != null && spawn) {
			if (entityIn instanceof EntityLiving) {
				((EntityLiving) entityIn).onInitialSpawn(
						entityIn.worldObj.getDifficultyForLocation(new BlockPos(entityIn)), (IEntityLivingData) null);
			}

			entityIn.worldObj.spawnEntityInWorld(entityIn);
		}

		return entityIn;
	}

	private void resetTimer() {
		if (this.maxSpawnDelay <= this.minSpawnDelay) {
			this.spawnDelay = this.minSpawnDelay;
		} else {
			int i = this.maxSpawnDelay - this.minSpawnDelay;
			this.spawnDelay = this.minSpawnDelay + this.getSpawnerWorld().rand.nextInt(i);
		}

		if (this.minecartToSpawn.size() > 0) {
			this.setRandomEntity((MobSpawnerBaseLogic.WeightedRandomMinecart) WeightedRandom
					.getRandomItem(this.getSpawnerWorld().rand, this.minecartToSpawn));
		}

		this.func_98267_a(1);
	}

	public void readFromNBT(NBTTagCompound nbt) {
		this.mobID = nbt.getString("EntityId");
		this.spawnDelay = nbt.getShort("Delay");
		this.minecartToSpawn.clear();
		if (nbt.hasKey("SpawnPotentials", 9)) {
			NBTTagList nbttaglist = nbt.getTagList("SpawnPotentials", 10);

			for (int i = 0; i < nbttaglist.tagCount(); ++i) {
				this.minecartToSpawn
						.add(new MobSpawnerBaseLogic.WeightedRandomMinecart(nbttaglist.getCompoundTagAt(i)));
			}
		}

		if (nbt.hasKey("SpawnData", 10)) {
			this.setRandomEntity(
					new MobSpawnerBaseLogic.WeightedRandomMinecart(nbt.getCompoundTag("SpawnData"), this.mobID));
		} else {
			this.setRandomEntity((MobSpawnerBaseLogic.WeightedRandomMinecart) null);
		}

		if (nbt.hasKey("MinSpawnDelay", 99)) {
			this.minSpawnDelay = nbt.getShort("MinSpawnDelay");
			this.maxSpawnDelay = nbt.getShort("MaxSpawnDelay");
			this.spawnCount = nbt.getShort("SpawnCount");
		}

		if (nbt.hasKey("MaxNearbyEntities", 99)) {
			this.maxNearbyEntities = nbt.getShort("MaxNearbyEntities");
			this.activatingRangeFromPlayer = nbt.getShort("RequiredPlayerRange");
		}

		if (nbt.hasKey("SpawnRange", 99)) {
			this.spawnRange = nbt.getShort("SpawnRange");
		}

		if (this.getSpawnerWorld() != null) {
			this.cachedEntity = null;
		}

	}

	public void writeToNBT(NBTTagCompound nbt) {
		String s = this.getEntityNameToSpawn();
		if (!StringUtils.isNullOrEmpty(s)) {
			nbt.setString("EntityId", s);
			nbt.setShort("Delay", (short) this.spawnDelay);
			nbt.setShort("MinSpawnDelay", (short) this.minSpawnDelay);
			nbt.setShort("MaxSpawnDelay", (short) this.maxSpawnDelay);
			nbt.setShort("SpawnCount", (short) this.spawnCount);
			nbt.setShort("MaxNearbyEntities", (short) this.maxNearbyEntities);
			nbt.setShort("RequiredPlayerRange", (short) this.activatingRangeFromPlayer);
			nbt.setShort("SpawnRange", (short) this.spawnRange);
			if (this.getRandomEntity() != null) {
				nbt.setTag("SpawnData", this.getRandomEntity().nbtData.copy());
			}

			if (this.getRandomEntity() != null || this.minecartToSpawn.size() > 0) {
				NBTTagList nbttaglist = new NBTTagList();
				if (this.minecartToSpawn.size() > 0) {
					for (MobSpawnerBaseLogic.WeightedRandomMinecart mobspawnerbaselogic$weightedrandomminecart : this.minecartToSpawn) {
						nbttaglist.appendTag(mobspawnerbaselogic$weightedrandomminecart.toNBT());
					}
				} else {
					nbttaglist.appendTag(this.getRandomEntity().toNBT());
				}

				nbt.setTag("SpawnPotentials", nbttaglist);
			}

		}
	}

	public Entity func_180612_a(World worldIn) {
		if (this.cachedEntity == null) {
			Entity entity = EntityList.createEntityByName(this.getEntityNameToSpawn(), worldIn);
			if (entity != null) {
				entity = this.spawnNewEntity(entity, false);
				this.cachedEntity = entity;
			}
		}

		return this.cachedEntity;
	}

	/**+
	 * Sets the delay to minDelay if parameter given is 1, else
	 * return false.
	 */
	public boolean setDelayToMin(int delay) {
		if (delay == 1) {
			this.spawnDelay = this.minSpawnDelay;
			return true;
		} else {
			return false;
		}
	}

	private MobSpawnerBaseLogic.WeightedRandomMinecart getRandomEntity() {
		return this.randomEntity;
	}

	public void setRandomEntity(MobSpawnerBaseLogic.WeightedRandomMinecart parWeightedRandomMinecart) {
		this.randomEntity = parWeightedRandomMinecart;
	}

	public abstract void func_98267_a(int var1);

	public abstract World getSpawnerWorld();

	public abstract BlockPos getSpawnerPosition();

	public double getMobRotation() {
		return this.mobRotation;
	}

	public double getPrevMobRotation() {
		return this.prevMobRotation;
	}

	public class WeightedRandomMinecart extends WeightedRandom.Item {
		private final NBTTagCompound nbtData;
		private final String entityType;

		public WeightedRandomMinecart(NBTTagCompound tagCompound) {
			this(tagCompound.getCompoundTag("Properties"), tagCompound.getString("Type"),
					tagCompound.getInteger("Weight"));
		}

		public WeightedRandomMinecart(NBTTagCompound tagCompound, String type) {
			this(tagCompound, type, 1);
		}

		private WeightedRandomMinecart(NBTTagCompound tagCompound, String type, int weight) {
			super(weight);
			if (type.equals("Minecart")) {
				if (tagCompound != null) {
					type = EntityMinecart.EnumMinecartType.byNetworkID(tagCompound.getInteger("Type")).getName();
				} else {
					type = "MinecartRideable";
				}
			}

			this.nbtData = tagCompound;
			this.entityType = type;
		}

		public NBTTagCompound toNBT() {
			NBTTagCompound nbttagcompound = new NBTTagCompound();
			nbttagcompound.setTag("Properties", this.nbtData);
			nbttagcompound.setString("Type", this.entityType);
			nbttagcompound.setInteger("Weight", this.itemWeight);
			return nbttagcompound;
		}
	}
}