package net.minecraftforge.common;

import java.lang.reflect.Constructor;
import java.util.*;

import cpw.mods.fml.common.FMLCommonHandler;
import cpw.mods.fml.common.FMLLog;
import cpw.mods.fml.common.Mod;
import cpw.mods.fml.common.ModContainer;
import cpw.mods.fml.relauncher.Side;
import cpw.mods.fml.relauncher.SideOnly;

import net.minecraft.block.Block;
import net.minecraft.block.material.Material;
import net.minecraft.client.renderer.texture.IconRegister;
import net.minecraft.crash.CrashReport;
import net.minecraft.entity.monster.EntityEnderman;
import net.minecraft.item.Item;
import net.minecraft.item.ItemStack;
import net.minecraftforge.common.ForgeHooks.GrassEntry;
import net.minecraftforge.common.ForgeHooks.SeedEntry;
import net.minecraftforge.event.EventBus;
import net.minecraftforge.event.ForgeSubscribe;
import net.minecraftforge.event.entity.EntityEvent;
import net.minecraftforge.oredict.OreDictionary;

public class MinecraftForge
{
    /**
     * The core Forge EventBusses, all events for Forge will be fired on these,
     * you should use this to register all your listeners.
     * This replaces every register*Handler() function in the old version of Forge.
     * TERRAIN_GEN_BUS for terrain gen events
     * ORE_GEN_BUS for ore gen events
     * EVENT_BUS for everything else
     */
    public static final EventBus EVENT_BUS = new EventBus();
    public static final EventBus TERRAIN_GEN_BUS = new EventBus();
    public static final EventBus ORE_GEN_BUS = new EventBus();

    private static final ForgeInternalHandler INTERNAL_HANDLER = new ForgeInternalHandler();

    /** Register a new plant to be planted when bonemeal is used on grass.
     * @param block The block to place.
     * @param metadata The metadata to set for the block when being placed.
     * @param weight The weight of the plant, where red flowers are
     *               10 and yellow flowers are 20.
     */
    public static void addGrassPlant(Block block, int metadata, int weight)
    {
        ForgeHooks.grassList.add(new GrassEntry(block, metadata, weight));
    }

    /**
     * Register a new seed to be dropped when breaking tall grass.
     *
     * @param seed The item to drop as a seed.
     * @param weight The relative probability of the seeds,
     *               where wheat seeds are 10.
     */
    public static void addGrassSeed(ItemStack seed, int weight)
    {
        ForgeHooks.seedList.add(new SeedEntry(seed, weight));
    }

    /**
     *
     * Register a tool as a tool class with a given harvest level.
     *
     * @param tool The custom tool to register.
     * @param toolClass The tool class to register as.  The predefined tool
     *                  clases are "pickaxe", "shovel", "axe".  You can add
     *                  others for custom tools.
     * @param harvestLevel The harvest level of the tool.
     */
    public static void setToolClass(Item tool, String toolClass, int harvestLevel)
    {
        ForgeHooks.toolClasses.put(tool, Arrays.asList(toolClass, harvestLevel));
    }

    /**
     * Register a block to be harvested by a tool class.  This is the metadata
     * sensitive version, use it if your blocks are using metadata variants.
     * By default, this sets the block class as effective against that type.
     *
     * @param block The block to register.
     * @param metadata The metadata for the block subtype.
     * @param toolClass The tool class to register as able to remove this block.
     *                  You may register the same block multiple times with different tool
     *                  classes, if multiple tool types can be used to harvest this block.
     * @param harvestLevel The minimum tool harvest level required to successfully
     * harvest the block.
     * @see MinecraftForge#setToolClass for details on tool classes.
     */
    public static void setBlockHarvestLevel(Block block, int metadata, String toolClass, int harvestLevel)
    {
        List key = Arrays.asList(block, metadata, toolClass);
        ForgeHooks.toolHarvestLevels.put(key, harvestLevel);
        ForgeHooks.toolEffectiveness.add(key);
    }

    /**
     * Remove a block effectiveness mapping.  Since setBlockHarvestLevel
     * makes the tool class effective against the block by default, this can be
     * used to remove that mapping.  This will force a block to be harvested at
     * the same speed regardless of tool quality, while still requiring a given
     * harvesting level.
     *
     * @param block The block to remove effectiveness from.
     * @param metadata The metadata for the block subtype.
     * @param toolClass The tool class to remove the effectiveness mapping from.
     * @see MinecraftForge#setToolClass for details on tool classes.
     */
    public static void removeBlockEffectiveness(Block block, int metadata, String toolClass)
    {
        List key = Arrays.asList(block, metadata, toolClass);
        ForgeHooks.toolEffectiveness.remove(key);
    }

    /**
     * Register a block to be harvested by a tool class.
     * By default, this sets the block class as effective against that type.
     *
     * @param block The block to register.
     * @param toolClass The tool class to register as able to remove this block.
     *                  You may register the same block multiple times with different tool
     *                  classes, if multiple tool types can be used to harvest this block.
     * @param harvestLevel The minimum tool harvest level required to successfully
     *                     harvest the block.
     * @see MinecraftForge#setToolClass for details on tool classes.
     */
    public static void setBlockHarvestLevel(Block block, String toolClass, int harvestLevel)
    {
        for (int metadata = 0; metadata < 16; metadata++)
        {
            List key = Arrays.asList(block, metadata, toolClass);
            ForgeHooks.toolHarvestLevels.put(key, harvestLevel);
            ForgeHooks.toolEffectiveness.add(key);
        }
    }

    /**
     * Returns the block harvest level for a particular tool class.
     *
     * @param block The block to check.
     * @param metadata The metadata for the block subtype.
     * @param toolClass The tool class to check as able to remove this block.
     * @see MinecraftForge#setToolClass for details on tool classes.
     * @return The harvest level or -1 if no mapping exists.
     */
    public static int getBlockHarvestLevel(Block block, int metadata, String toolClass)
    {
        ForgeHooks.initTools();
        List key = Arrays.asList(block, metadata, toolClass);
        Integer harvestLevel = ForgeHooks.toolHarvestLevels.get(key);
        return (harvestLevel == null ? -1 : harvestLevel);
    }

    /**
     * Remove a block effectiveness mapping.  Since setBlockHarvestLevel
     * makes the tool class effective against the block by default, this can be
     * used to remove that mapping.  This will force a block to be harvested at
     * the same speed regardless of tool quality, while still requiring a given
     * harvesting level.
     *
     * @param block The block to remove effectiveness from.
     * @param toolClass The tool class to remove the effectiveness mapping from.
     * @see MinecraftForge#setToolClass for details on tool classes.
     */
    public static void removeBlockEffectiveness(Block block, String toolClass)
    {
        for (int metadata = 0; metadata < 16; metadata++)
        {
            List key = Arrays.asList(block, metadata, toolClass);
            ForgeHooks.toolEffectiveness.remove(key);
        }
    }

    /**
     * Method invoked by FML before any other mods are loaded.
     */
    public static void initialize()
    {
        System.out.printf("MinecraftForge v%s Initialized\n", ForgeVersion.getVersion());
        FMLLog.info("MinecraftForge v%s Initialized", ForgeVersion.getVersion());
        Block filler = new Block(0, Material.air)
        {
            @SideOnly(Side.CLIENT)
            @Override
            public void registerIcons(IconRegister register) {}
        };
        Block.blocksList[0] = null;
        Block.opaqueCubeLookup[0] = false;
        Block.lightOpacity[0] = 0;
        filler.setUnlocalizedName("ForgeFiller");

        for (int x = 256; x < 4096; x++)
        {
            if (Item.itemsList[x] != null)
            {
                Block.blocksList[x] = filler;
            }
        }

        boolean[] temp = new boolean[4096];
        System.arraycopy(EntityEnderman.carriableBlocks, 0, temp, 0, EntityEnderman.carriableBlocks.length);
        EntityEnderman.carriableBlocks = temp;
        EVENT_BUS.register(INTERNAL_HANDLER);
        OreDictionary.getOreName(0);
        //Force these classes to be defined, Should prevent derp error hiding.
        new CrashReport("ThisIsFake", new Exception("Not real"));
    }

    public static String getBrandingVersion()
    {
        return "Minecraft Forge " + ForgeVersion.getVersion();
    }
}
