package net.minecraft.world.biome;

import com.google.common.collect.Lists;
import java.util.List;
import java.util.Random;
import net.minecraft.crash.CrashReport;
import net.minecraft.crash.CrashReportCategory;
import net.minecraft.util.BlockPos;
import net.minecraft.util.ReportedException;
import net.minecraft.world.World;
import net.minecraft.world.WorldType;
import net.minecraft.world.gen.layer.GenLayer;
import net.minecraft.world.gen.layer.IntCache;

public class WorldChunkManager
{
    private GenLayer genBiomes;

    /** A GenLayer containing the indices into BiomeGenBase.biomeList[] */
    private GenLayer biomeIndexLayer;

    /** The biome list. */
    private BiomeCache biomeCache;
    private List<BiomeGenBase> biomesToSpawnIn;
    private String field_180301_f;

    protected WorldChunkManager()
    {
        this.biomeCache = new BiomeCache(this);
        this.field_180301_f = "";
        this.biomesToSpawnIn = Lists.<BiomeGenBase>newArrayList();
        this.biomesToSpawnIn.add(BiomeGenBase.forest);
        this.biomesToSpawnIn.add(BiomeGenBase.plains);
        this.biomesToSpawnIn.add(BiomeGenBase.taiga);
        this.biomesToSpawnIn.add(BiomeGenBase.taigaHills);
        this.biomesToSpawnIn.add(BiomeGenBase.forestHills);
        this.biomesToSpawnIn.add(BiomeGenBase.jungle);
        this.biomesToSpawnIn.add(BiomeGenBase.jungleHills);
    }

    public WorldChunkManager(long seed, WorldType p_i45744_3_, String p_i45744_4_)
    {
        this();
        this.field_180301_f = p_i45744_4_;
        GenLayer[] agenlayer = GenLayer.initializeAllBiomeGenerators(seed, p_i45744_3_, p_i45744_4_);
        this.genBiomes = agenlayer[0];
        this.biomeIndexLayer = agenlayer[1];
    }

    public WorldChunkManager(World worldIn)
    {
        this(worldIn.getSeed(), worldIn.getWorldInfo().getTerrainType(), worldIn.getWorldInfo().getGeneratorOptions());
    }

    public List<BiomeGenBase> getBiomesToSpawnIn()
    {
        return this.biomesToSpawnIn;
    }

    /**
     * Returns the biome generator
     */
    public BiomeGenBase getBiomeGenerator(BlockPos pos)
    {
        return this.getBiomeGenerator(pos, (BiomeGenBase)null);
    }

    public BiomeGenBase getBiomeGenerator(BlockPos pos, BiomeGenBase biomeGenBaseIn)
    {
        return this.biomeCache.func_180284_a(pos.getX(), pos.getZ(), biomeGenBaseIn);
    }

    /**
     * Returns a list of rainfall values for the specified blocks. Args: listToReuse, x, z, width, length.
     */
    public float[] getRainfall(float[] listToReuse, int x, int z, int width, int length)
    {
        IntCache.resetIntCache();

        if (listToReuse == null || listToReuse.length < width * length)
        {
            listToReuse = new float[width * length];
        }

        int[] aint = this.biomeIndexLayer.getInts(x, z, width, length);

        for (int i = 0; i < width * length; ++i)
        {
            try
            {
                float f = (float)BiomeGenBase.getBiomeFromBiomeList(aint[i], BiomeGenBase.field_180279_ad).getIntRainfall() / 65536.0F;

                if (f > 1.0F)
                {
                    f = 1.0F;
                }

                listToReuse[i] = f;
            }
            catch (Throwable throwable)
            {
                CrashReport crashreport = CrashReport.makeCrashReport(throwable, "Invalid Biome id");
                CrashReportCategory crashreportcategory = crashreport.makeCategory("DownfallBlock");
                crashreportcategory.addCrashSection("biome id", Integer.valueOf(i));
                crashreportcategory.addCrashSection("downfalls[] size", Integer.valueOf(listToReuse.length));
                crashreportcategory.addCrashSection("x", Integer.valueOf(x));
                crashreportcategory.addCrashSection("z", Integer.valueOf(z));
                crashreportcategory.addCrashSection("w", Integer.valueOf(width));
                crashreportcategory.addCrashSection("h", Integer.valueOf(length));
                throw new ReportedException(crashreport);
            }
        }

        return listToReuse;
    }

    /**
     * Returns an array of biomes for the location input.
     */
    public BiomeGenBase[] getBiomesForGeneration(BiomeGenBase[] biomes, int x, int z, int width, int height)
    {
        IntCache.resetIntCache();

        if (biomes == null || biomes.length < width * height)
        {
            biomes = new BiomeGenBase[width * height];
        }

        int[] aint = this.genBiomes.getInts(x, z, width, height);

        try
        {
            for (int i = 0; i < width * height; ++i)
            {
                biomes[i] = BiomeGenBase.getBiomeFromBiomeList(aint[i], BiomeGenBase.field_180279_ad);
            }

            return biomes;
        }
        catch (Throwable throwable)
        {
            CrashReport crashreport = CrashReport.makeCrashReport(throwable, "Invalid Biome id");
            CrashReportCategory crashreportcategory = crashreport.makeCategory("RawBiomeBlock");
            crashreportcategory.addCrashSection("biomes[] size", Integer.valueOf(biomes.length));
            crashreportcategory.addCrashSection("x", Integer.valueOf(x));
            crashreportcategory.addCrashSection("z", Integer.valueOf(z));
            crashreportcategory.addCrashSection("w", Integer.valueOf(width));
            crashreportcategory.addCrashSection("h", Integer.valueOf(height));
            throw new ReportedException(crashreport);
        }
    }

    /**
     * Returns biomes to use for the blocks and loads the other data like temperature and humidity onto the
     * WorldChunkManager Args: oldBiomeList, x, z, width, depth
     */
    public BiomeGenBase[] loadBlockGeneratorData(BiomeGenBase[] oldBiomeList, int x, int z, int width, int depth)
    {
        return this.getBiomeGenAt(oldBiomeList, x, z, width, depth, true);
    }

    /**
     * Return a list of biomes for the specified blocks. Args: listToReuse, x, y, width, length, cacheFlag (if false,
     * don't check biomeCache to avoid infinite loop in BiomeCacheBlock)
     */
    public BiomeGenBase[] getBiomeGenAt(BiomeGenBase[] listToReuse, int x, int z, int width, int length, boolean cacheFlag)
    {
        IntCache.resetIntCache();

        if (listToReuse == null || listToReuse.length < width * length)
        {
            listToReuse = new BiomeGenBase[width * length];
        }

        if (cacheFlag && width == 16 && length == 16 && (x & 15) == 0 && (z & 15) == 0)
        {
            BiomeGenBase[] abiomegenbase = this.biomeCache.getCachedBiomes(x, z);
            System.arraycopy(abiomegenbase, 0, listToReuse, 0, width * length);
            return listToReuse;
        }
        else
        {
            int[] aint = this.biomeIndexLayer.getInts(x, z, width, length);

            for (int i = 0; i < width * length; ++i)
            {
                listToReuse[i] = BiomeGenBase.getBiomeFromBiomeList(aint[i], BiomeGenBase.field_180279_ad);
            }

            return listToReuse;
        }
    }

    /**
     * checks given Chunk's Biomes against List of allowed ones
     */
    public boolean areBiomesViable(int p_76940_1_, int p_76940_2_, int p_76940_3_, List<BiomeGenBase> p_76940_4_)
    {
        IntCache.resetIntCache();
        int i = p_76940_1_ - p_76940_3_ >> 2;
        int j = p_76940_2_ - p_76940_3_ >> 2;
        int k = p_76940_1_ + p_76940_3_ >> 2;
        int l = p_76940_2_ + p_76940_3_ >> 2;
        int i1 = k - i + 1;
        int j1 = l - j + 1;
        int[] aint = this.genBiomes.getInts(i, j, i1, j1);

        try
        {
            for (int k1 = 0; k1 < i1 * j1; ++k1)
            {
                BiomeGenBase biomegenbase = BiomeGenBase.getBiome(aint[k1]);

                if (!p_76940_4_.contains(biomegenbase))
                {
                    return false;
                }
            }

            return true;
        }
        catch (Throwable throwable)
        {
            CrashReport crashreport = CrashReport.makeCrashReport(throwable, "Invalid Biome id");
            CrashReportCategory crashreportcategory = crashreport.makeCategory("Layer");
            crashreportcategory.addCrashSection("Layer", this.genBiomes.toString());
            crashreportcategory.addCrashSection("x", Integer.valueOf(p_76940_1_));
            crashreportcategory.addCrashSection("z", Integer.valueOf(p_76940_2_));
            crashreportcategory.addCrashSection("radius", Integer.valueOf(p_76940_3_));
            crashreportcategory.addCrashSection("allowed", p_76940_4_);
            throw new ReportedException(crashreport);
        }
    }

    public BlockPos findBiomePosition(int x, int z, int range, List<BiomeGenBase> biomes, Random random)
    {
        IntCache.resetIntCache();
        int i = x - range >> 2;
        int j = z - range >> 2;
        int k = x + range >> 2;
        int l = z + range >> 2;
        int i1 = k - i + 1;
        int j1 = l - j + 1;
        int[] aint = this.genBiomes.getInts(i, j, i1, j1);
        BlockPos blockpos = null;
        int k1 = 0;

        for (int l1 = 0; l1 < i1 * j1; ++l1)
        {
            int i2 = i + l1 % i1 << 2;
            int j2 = j + l1 / i1 << 2;
            BiomeGenBase biomegenbase = BiomeGenBase.getBiome(aint[l1]);

            if (biomes.contains(biomegenbase) && (blockpos == null || random.nextInt(k1 + 1) == 0))
            {
                blockpos = new BlockPos(i2, 0, j2);
                ++k1;
            }
        }

        return blockpos;
    }

    /**
     * Calls the WorldChunkManager's biomeCache.cleanupCache()
     */
    public void cleanupCache()
    {
        this.biomeCache.cleanupCache();
    }
}
