package net.minecraft.item;

import com.google.common.collect.HashMultiset;
import com.google.common.collect.Iterables;
import com.google.common.collect.Multiset;
import com.google.common.collect.Multisets;
import net.minecraft.block.Block;
import net.minecraft.block.BlockDirt;
import net.minecraft.block.BlockStone;
import net.minecraft.block.material.MapColor;
import net.minecraft.block.state.IBlockState;
import net.minecraft.entity.Entity;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.init.Blocks;
import net.minecraft.init.Items;
import net.minecraft.network.Packet;
import net.minecraft.util.BlockPos;
import net.minecraft.util.MathHelper;
import net.minecraft.world.World;
import net.minecraft.world.chunk.Chunk;
import net.minecraft.world.storage.MapData;

public class ItemMap extends ItemMapBase
{
    protected ItemMap()
    {
        this.setHasSubtypes(true);
    }

    public MapData getMapData(ItemStack stack, World worldIn)
    {
        String s = "map_" + stack.getMetadata();
        MapData mapdata = (MapData)worldIn.loadItemData(MapData.class, s);

        if (mapdata == null && !worldIn.isRemote)
        {
            stack.setItemDamage(worldIn.getUniqueDataId("map"));
            s = "map_" + stack.getMetadata();
            mapdata = new MapData(s);
            mapdata.scale = 3;
            mapdata.calculateMapCenter((double)worldIn.getWorldInfo().getSpawnX(), (double)worldIn.getWorldInfo().getSpawnZ(), mapdata.scale);
            mapdata.dimension = (byte)worldIn.provider.getDimensionId();
            mapdata.markDirty();
            worldIn.setItemData(s, mapdata);
        }

        return mapdata;
    }

    public void updateMapData(World worldIn, Entity viewer, MapData data)
    {
        if (worldIn.provider.getDimensionId() == data.dimension && viewer instanceof EntityPlayer)
        {
            int i = 1 << data.scale;
            int j = data.xCenter;
            int k = data.zCenter;
            int l = MathHelper.floor_double(viewer.posX - (double)j) / i + 64;
            int i1 = MathHelper.floor_double(viewer.posZ - (double)k) / i + 64;
            int j1 = 128 / i;

            if (worldIn.provider.getHasNoSky())
            {
                j1 /= 2;
            }

            MapData.MapInfo mapdata$mapinfo = data.getMapInfo((EntityPlayer)viewer);
            ++mapdata$mapinfo.field_82569_d;
            boolean flag = false;

            for (int k1 = l - j1 + 1; k1 < l + j1; ++k1)
            {
                if ((k1 & 15) == (mapdata$mapinfo.field_82569_d & 15) || flag)
                {
                    flag = false;
                    double d0 = 0.0D;

                    for (int l1 = i1 - j1 - 1; l1 < i1 + j1; ++l1)
                    {
                        if (k1 >= 0 && l1 >= -1 && k1 < 128 && l1 < 128)
                        {
                            int i2 = k1 - l;
                            int j2 = l1 - i1;
                            boolean flag1 = i2 * i2 + j2 * j2 > (j1 - 2) * (j1 - 2);
                            int k2 = (j / i + k1 - 64) * i;
                            int l2 = (k / i + l1 - 64) * i;
                            Multiset<MapColor> multiset = HashMultiset.<MapColor>create();
                            Chunk chunk = worldIn.getChunkFromBlockCoords(new BlockPos(k2, 0, l2));

                            if (!chunk.isEmpty())
                            {
                                int i3 = k2 & 15;
                                int j3 = l2 & 15;
                                int k3 = 0;
                                double d1 = 0.0D;

                                if (worldIn.provider.getHasNoSky())
                                {
                                    int l3 = k2 + l2 * 231871;
                                    l3 = l3 * l3 * 31287121 + l3 * 11;

                                    if ((l3 >> 20 & 1) == 0)
                                    {
                                        multiset.add(Blocks.dirt.getMapColor(Blocks.dirt.getDefaultState().withProperty(BlockDirt.VARIANT, BlockDirt.DirtType.DIRT)), 10);
                                    }
                                    else
                                    {
                                        multiset.add(Blocks.stone.getMapColor(Blocks.stone.getDefaultState().withProperty(BlockStone.VARIANT, BlockStone.EnumType.STONE)), 100);
                                    }

                                    d1 = 100.0D;
                                }
                                else
                                {
                                    BlockPos.MutableBlockPos blockpos$mutableblockpos = new BlockPos.MutableBlockPos();

                                    for (int i4 = 0; i4 < i; ++i4)
                                    {
                                        for (int j4 = 0; j4 < i; ++j4)
                                        {
                                            int k4 = chunk.getHeightValue(i4 + i3, j4 + j3) + 1;
                                            IBlockState iblockstate = Blocks.air.getDefaultState();

                                            if (k4 > 1)
                                            {
                                                label541:
                                                {
                                                    while (true)
                                                    {
                                                        --k4;
                                                        iblockstate = chunk.getBlockState(blockpos$mutableblockpos.func_181079_c(i4 + i3, k4, j4 + j3));

                                                        if (iblockstate.getBlock().getMapColor(iblockstate) != MapColor.airColor || k4 <= 0)
                                                        {
                                                            break;
                                                        }
                                                    }

                                                    if (k4 > 0 && iblockstate.getBlock().getMaterial().isLiquid())
                                                    {
                                                        int l4 = k4 - 1;

                                                        while (true)
                                                        {
                                                            Block block = chunk.getBlock(i4 + i3, l4--, j4 + j3);
                                                            ++k3;

                                                            if (l4 <= 0 || !block.getMaterial().isLiquid())
                                                            {
                                                                break label541;
                                                            }
                                                        }
                                                    }
                                                }
                                            }

                                            d1 += (double)k4 / (double)(i * i);
                                            multiset.add(iblockstate.getBlock().getMapColor(iblockstate));
                                        }
                                    }
                                }

                                k3 = k3 / (i * i);
                                double d2 = (d1 - d0) * 4.0D / (double)(i + 4) + ((double)(k1 + l1 & 1) - 0.5D) * 0.4D;
                                int i5 = 1;

                                if (d2 > 0.6D)
                                {
                                    i5 = 2;
                                }

                                if (d2 < -0.6D)
                                {
                                    i5 = 0;
                                }

                                MapColor mapcolor = (MapColor)Iterables.getFirst(Multisets.<MapColor>copyHighestCountFirst(multiset), MapColor.airColor);

                                if (mapcolor == MapColor.waterColor)
                                {
                                    d2 = (double)k3 * 0.1D + (double)(k1 + l1 & 1) * 0.2D;
                                    i5 = 1;

                                    if (d2 < 0.5D)
                                    {
                                        i5 = 2;
                                    }

                                    if (d2 > 0.9D)
                                    {
                                        i5 = 0;
                                    }
                                }

                                d0 = d1;

                                if (l1 >= 0 && i2 * i2 + j2 * j2 < j1 * j1 && (!flag1 || (k1 + l1 & 1) != 0))
                                {
                                    byte b0 = data.colors[k1 + l1 * 128];
                                    byte b1 = (byte)(mapcolor.colorIndex * 4 + i5);

                                    if (b0 != b1)
                                    {
                                        data.colors[k1 + l1 * 128] = b1;
                                        data.updateMapData(k1, l1);
                                        flag = true;
                                    }
                                }
                            }
                        }
                    }
                }
            }
        }
    }

    /**
     * Called each tick as long the item is on a player inventory. Uses by maps to check if is on a player hand and
     * update it's contents.
     */
    public void onUpdate(ItemStack stack, World worldIn, Entity entityIn, int itemSlot, boolean isSelected)
    {
        if (!worldIn.isRemote)
        {
            MapData mapdata = this.getMapData(stack, worldIn);

            if (entityIn instanceof EntityPlayer)
            {
                EntityPlayer entityplayer = (EntityPlayer)entityIn;
                mapdata.updateVisiblePlayers(entityplayer, stack);
            }

            if (isSelected)
            {
                this.updateMapData(worldIn, entityIn, mapdata);
            }
        }
    }

    public Packet createMapDataPacket(ItemStack stack, World worldIn, EntityPlayer player)
    {
        return this.getMapData(stack, worldIn).getMapPacket(stack, worldIn, player);
    }

    /**
     * Called when item is crafted/smelted. Used only by maps so far.
     */
    public void onCreated(ItemStack stack, World worldIn, EntityPlayer playerIn)
    {
        if (stack.hasTagCompound() && stack.getTagCompound().getBoolean("map_is_scaling"))
        {
            MapData mapdata = Items.filled_map.getMapData(stack, worldIn);
            stack.setItemDamage(worldIn.getUniqueDataId("map"));
            MapData mapdata1 = new MapData("map_" + stack.getMetadata());
            mapdata1.scale = (byte)(mapdata.scale + 1);

            if (mapdata1.scale > 4)
            {
                mapdata1.scale = 4;
            }

            mapdata1.calculateMapCenter((double)mapdata.xCenter, (double)mapdata.zCenter, mapdata1.scale);
            mapdata1.dimension = mapdata.dimension;
            mapdata1.markDirty();
            worldIn.setItemData("map_" + stack.getMetadata(), mapdata1);
        }
    }
}