package net.minecraft.world.gen.layer;

import net.minecraft.world.biome.BiomeGenBase;

public class GenLayerHills extends GenLayer
{
    public GenLayerHills(long par1, GenLayer par3GenLayer)
    {
        super(par1);
        this.parent = par3GenLayer;
    }

    /**
     * Returns a list of integer values generated by this layer. These may be interpreted as temperatures, rainfall
     * amounts, or biomeList[] indices based on the particular GenLayer subclass.
     */
    public int[] getInts(int par1, int par2, int par3, int par4)
    {
        int[] var5 = this.parent.getInts(par1 - 1, par2 - 1, par3 + 2, par4 + 2);
        int[] var6 = IntCache.getIntCache(par3 * par4);

        for (int var7 = 0; var7 < par4; ++var7)
        {
            for (int var8 = 0; var8 < par3; ++var8)
            {
                this.initChunkSeed((long)(var8 + par1), (long)(var7 + par2));
                int var9 = var5[var8 + 1 + (var7 + 1) * (par3 + 2)];

                if (this.nextInt(3) == 0)
                {
                    int var10 = var9;

                    if (var9 == BiomeGenBase.desert.biomeID)
                    {
                        var10 = BiomeGenBase.desertHills.biomeID;
                    }
                    else if (var9 == BiomeGenBase.forest.biomeID)
                    {
                        var10 = BiomeGenBase.forestHills.biomeID;
                    }
                    else if (var9 == BiomeGenBase.taiga.biomeID)
                    {
                        var10 = BiomeGenBase.taigaHills.biomeID;
                    }
                    else if (var9 == BiomeGenBase.plains.biomeID)
                    {
                        var10 = BiomeGenBase.forest.biomeID;
                    }
                    else if (var9 == BiomeGenBase.icePlains.biomeID)
                    {
                        var10 = BiomeGenBase.iceMountains.biomeID;
                    }
                    else if (var9 == BiomeGenBase.jungle.biomeID)
                    {
                        var10 = BiomeGenBase.jungleHills.biomeID;
                    }

                    if (var10 == var9)
                    {
                        var6[var8 + var7 * par3] = var9;
                    }
                    else
                    {
                        int var11 = var5[var8 + 1 + (var7 + 1 - 1) * (par3 + 2)];
                        int var12 = var5[var8 + 1 + 1 + (var7 + 1) * (par3 + 2)];
                        int var13 = var5[var8 + 1 - 1 + (var7 + 1) * (par3 + 2)];
                        int var14 = var5[var8 + 1 + (var7 + 1 + 1) * (par3 + 2)];

                        if (var11 == var9 && var12 == var9 && var13 == var9 && var14 == var9)
                        {
                            var6[var8 + var7 * par3] = var10;
                        }
                        else
                        {
                            var6[var8 + var7 * par3] = var9;
                        }
                    }
                }
                else
                {
                    var6[var8 + var7 * par3] = var9;
                }
            }
        }

        return var6;
    }
}
