package ru.betterend.world.biome;

import java.util.List;
import java.util.Random;

import com.google.common.collect.Lists;

import net.minecraft.util.Identifier;
import net.minecraft.util.math.BlockPos;
import net.minecraft.util.registry.BuiltinRegistries;
import net.minecraft.world.WorldAccess;
import net.minecraft.world.biome.Biome;

public class EndBiome
{
	protected List<Subbiome> subbiomes = Lists.newArrayList();
	
	protected final Biome biome;
	protected final Identifier mcID;
	protected EndBiome edge;
	protected int edgeSize;
	
	protected EndBiome biomeParent;
	protected float maxSubBiomeChance = 1;
	protected float genChance = 1;
	protected float noiseDensity = 0.3F;
	protected float plantDensity = 1.0001F;
	
	public EndBiome(BiomeDefinition definition)
	{
		biome = definition.build();
		mcID = definition.getID();
	}
	
	public EndBiome(Biome biome)
	{
		this.biome = biome;
		mcID = BuiltinRegistries.BIOME.getId(biome);
	}
	
	public void setPlantDensity(float density)
	{
		this.plantDensity = density * 1.0001F;
	}
	
	public float getPlantDensity()
	{
		return plantDensity;
	}
	
	public void setNoiseDensity(float density)
	{
		this.noiseDensity = 1 - density * 2;
	}
	
	public float getNoiseDensity()
	{
		return (1F - this.noiseDensity) / 2F;
	}
	
	public void genSurfColumn(WorldAccess world, BlockPos pos, Random random) {}

	public EndBiome getEdge()
	{
		return edge == null ? this : edge;
	}
	
	public void setEdge(EndBiome edge)
	{
		this.edge = edge;
		edge.biomeParent = this;
	}

	public int getEdgeSize()
	{
		return edgeSize;
	}
	
	public void setEdgeSize(int size)
	{
		edgeSize = size;
	}
	
	public void addSubBiome(EndBiome biome, float chance)
	{
		maxSubBiomeChance += chance;
		biome.biomeParent = this;
		subbiomes.add(new Subbiome(biome, maxSubBiomeChance));
	}
	
	public EndBiome getSubBiome(Random random)
	{
		float chance = random.nextFloat() * maxSubBiomeChance;
		for (Subbiome biome: subbiomes)
			if (biome.canGenerate(chance))
				return biome.biome;
		return this;
	}
	
	public EndBiome getParentBiome()
	{
		return this.biomeParent;
	}
	
	public boolean hasEdge()
	{
		return edge != null;
	}
	
	public boolean hasParentBiome()
	{
		return biomeParent != null;
	}
	
	public boolean isSame(EndBiome biome)
	{
		return biome == this || (biome.hasParentBiome() && biome.getParentBiome() == this);
	}
	
	protected final class Subbiome
	{
		EndBiome biome;
		float chance;
		
		Subbiome(EndBiome biome, float chance)
		{
			this.biome = biome;
			this.chance = chance;
		}
		
		public boolean canGenerate(float chance)
		{
			return chance < this.chance;
		}
	}
	
	public boolean canGenerate(float chance)
	{
		return chance <= this.genChance;
	}
	
	public float setGenChance(float chance)
	{
		genChance += chance;
		return genChance;
	}
	
	public Biome getBiome()
	{
		return biome;
	}
	
	@Override
	public String toString()
	{
		return mcID.toString();
	}

	public Identifier getID()
	{
		return mcID;
	}
}