package net.minecraft.enchantment;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.Random;
import net.minecraft.entity.EntityLiving;
import net.minecraft.item.Item;
import net.minecraft.item.ItemStack;
import net.minecraft.nbt.NBTTagCompound;
import net.minecraft.nbt.NBTTagList;
import net.minecraft.util.DamageSource;
import net.minecraft.util.WeightedRandom;
public class EnchantmentHelper
{
/** Is the random seed of enchantment effects. */
private static final Random enchantmentRand = new Random();
/**
* Used to calculate the extra armor of enchantments on armors equipped on player.
*/
private static final EnchantmentModifierDamage enchantmentModifierDamage = new EnchantmentModifierDamage((Empty3)null);
/**
* Used to calculate the (magic) extra damage done by enchantments on current equipped item of player.
*/
private static final EnchantmentModifierLiving enchantmentModifierLiving = new EnchantmentModifierLiving((Empty3)null);
/**
* Returns the level of enchantment on the ItemStack passed.
*/
public static int getEnchantmentLevel(int par0, ItemStack par1ItemStack)
{
if (par1ItemStack == null)
{
return 0;
}
else
{
NBTTagList var2 = par1ItemStack.getEnchantmentTagList();
if (var2 == null)
{
return 0;
}
else
{
for (int var3 = 0; var3 < var2.tagCount(); ++var3)
{
short var4 = ((NBTTagCompound)var2.tagAt(var3)).getShort("id");
short var5 = ((NBTTagCompound)var2.tagAt(var3)).getShort("lvl");
if (var4 == par0)
{
return var5;
}
}
return 0;
}
}
}
/**
* Return the enchantments for the specified stack.
*/
public static Map getEnchantments(ItemStack par0ItemStack)
{
LinkedHashMap var1 = new LinkedHashMap();
NBTTagList var2 = par0ItemStack.itemID == Item.field_92053_bW.itemID ? Item.field_92053_bW.func_92056_g(par0ItemStack) : par0ItemStack.getEnchantmentTagList();
if (var2 != null)
{
for (int var3 = 0; var3 < var2.tagCount(); ++var3)
{
short var4 = ((NBTTagCompound)var2.tagAt(var3)).getShort("id");
short var5 = ((NBTTagCompound)var2.tagAt(var3)).getShort("lvl");
var1.put(Integer.valueOf(var4), Integer.valueOf(var5));
}
}
return var1;
}
/**
* Set the enchantments for the specified stack.
*/
public static void setEnchantments(Map par0Map, ItemStack par1ItemStack)
{
NBTTagList var2 = new NBTTagList();
Iterator var3 = par0Map.keySet().iterator();
while (var3.hasNext())
{
int var4 = ((Integer)var3.next()).intValue();
NBTTagCompound var5 = new NBTTagCompound();
var5.setShort("id", (short)var4);
var5.setShort("lvl", (short)((Integer)par0Map.get(Integer.valueOf(var4))).intValue());
var2.appendTag(var5);
if (par1ItemStack.itemID == Item.field_92053_bW.itemID)
{
Item.field_92053_bW.func_92060_a(par1ItemStack, new EnchantmentData(var4, ((Integer)par0Map.get(Integer.valueOf(var4))).intValue()));
}
}
if (var2.tagCount() > 0)
{
if (par1ItemStack.itemID != Item.field_92053_bW.itemID)
{
par1ItemStack.setTagInfo("ench", var2);
}
}
else if (par1ItemStack.hasTagCompound())
{
par1ItemStack.getTagCompound().removeTag("ench");
}
}
/**
* Returns the biggest level of the enchantment on the array of ItemStack passed.
*/
public static int getMaxEnchantmentLevel(int par0, ItemStack[] par1ArrayOfItemStack)
{
if (par1ArrayOfItemStack == null)
{
return 0;
}
else
{
int var2 = 0;
ItemStack[] var3 = par1ArrayOfItemStack;
int var4 = par1ArrayOfItemStack.length;
for (int var5 = 0; var5 < var4; ++var5)
{
ItemStack var6 = var3[var5];
int var7 = getEnchantmentLevel(par0, var6);
if (var7 > var2)
{
var2 = var7;
}
}
return var2;
}
}
/**
* Executes the enchantment modifier on the ItemStack passed.
*/
private static void applyEnchantmentModifier(IEnchantmentModifier par0IEnchantmentModifier, ItemStack par1ItemStack)
{
if (par1ItemStack != null)
{
NBTTagList var2 = par1ItemStack.getEnchantmentTagList();
if (var2 != null)
{
for (int var3 = 0; var3 < var2.tagCount(); ++var3)
{
short var4 = ((NBTTagCompound)var2.tagAt(var3)).getShort("id");
short var5 = ((NBTTagCompound)var2.tagAt(var3)).getShort("lvl");
if (Enchantment.enchantmentsList[var4] != null)
{
par0IEnchantmentModifier.calculateModifier(Enchantment.enchantmentsList[var4], var5);
}
}
}
}
}
/**
* Executes the enchantment modifier on the array of ItemStack passed.
*/
private static void applyEnchantmentModifierArray(IEnchantmentModifier par0IEnchantmentModifier, ItemStack[] par1ArrayOfItemStack)
{
ItemStack[] var2 = par1ArrayOfItemStack;
int var3 = par1ArrayOfItemStack.length;
for (int var4 = 0; var4 < var3; ++var4)
{
ItemStack var5 = var2[var4];
applyEnchantmentModifier(par0IEnchantmentModifier, var5);
}
}
/**
* Returns the modifier of protection enchantments on armors equipped on player.
*/
public static int getEnchantmentModifierDamage(ItemStack[] par0ArrayOfItemStack, DamageSource par1DamageSource)
{
enchantmentModifierDamage.damageModifier = 0;
enchantmentModifierDamage.source = par1DamageSource;
applyEnchantmentModifierArray(enchantmentModifierDamage, par0ArrayOfItemStack);
if (enchantmentModifierDamage.damageModifier > 25)
{
enchantmentModifierDamage.damageModifier = 25;
}
return (enchantmentModifierDamage.damageModifier + 1 >> 1) + enchantmentRand.nextInt((enchantmentModifierDamage.damageModifier >> 1) + 1);
}
/**
* Return the (magic) extra damage of the enchantments on player equipped item.
*/
public static int getEnchantmentModifierLiving(EntityLiving par0EntityLiving, EntityLiving par1EntityLiving)
{
enchantmentModifierLiving.livingModifier = 0;
enchantmentModifierLiving.entityLiving = par1EntityLiving;
applyEnchantmentModifier(enchantmentModifierLiving, par0EntityLiving.getHeldItem());
return enchantmentModifierLiving.livingModifier > 0 ? 1 + enchantmentRand.nextInt(enchantmentModifierLiving.livingModifier) : 0;
}
/**
* Returns the knockback value of enchantments on equipped player item.
*/
public static int getKnockbackModifier(EntityLiving par0EntityLiving, EntityLiving par1EntityLiving)
{
return getEnchantmentLevel(Enchantment.knockback.effectId, par0EntityLiving.getHeldItem());
}
public static int getFireAspectModifier(EntityLiving par0EntityLiving)
{
return getEnchantmentLevel(Enchantment.fireAspect.effectId, par0EntityLiving.getHeldItem());
}
/**
* Returns the 'Water Breathing' modifier of enchantments on player equipped armors.
*/
public static int getRespiration(EntityLiving par0EntityLiving)
{
return getMaxEnchantmentLevel(Enchantment.respiration.effectId, par0EntityLiving.getLastActiveItems());
}
/**
* Return the extra efficiency of tools based on enchantments on equipped player item.
*/
public static int getEfficiencyModifier(EntityLiving par0EntityLiving)
{
return getEnchantmentLevel(Enchantment.efficiency.effectId, par0EntityLiving.getHeldItem());
}
/**
* Returns the silk touch status of enchantments on current equipped item of player.
*/
public static boolean getSilkTouchModifier(EntityLiving par0EntityLiving)
{
return getEnchantmentLevel(Enchantment.silkTouch.effectId, par0EntityLiving.getHeldItem()) > 0;
}
/**
* Returns the fortune enchantment modifier of the current equipped item of player.
*/
public static int getFortuneModifier(EntityLiving par0EntityLiving)
{
return getEnchantmentLevel(Enchantment.fortune.effectId, par0EntityLiving.getHeldItem());
}
/**
* Returns the looting enchantment modifier of the current equipped item of player.
*/
public static int getLootingModifier(EntityLiving par0EntityLiving)
{
return getEnchantmentLevel(Enchantment.looting.effectId, par0EntityLiving.getHeldItem());
}
/**
* Returns the aqua affinity status of enchantments on current equipped item of player.
*/
public static boolean getAquaAffinityModifier(EntityLiving par0EntityLiving)
{
return getMaxEnchantmentLevel(Enchantment.aquaAffinity.effectId, par0EntityLiving.getLastActiveItems()) > 0;
}
public static int func_92046_i(EntityLiving par0EntityLiving)
{
return getMaxEnchantmentLevel(Enchantment.field_92039_k.effectId, par0EntityLiving.getLastActiveItems());
}
public static ItemStack func_92047_a(Enchantment par0Enchantment, EntityLiving par1EntityLiving)
{
ItemStack[] var2 = par1EntityLiving.getLastActiveItems();
int var3 = var2.length;
for (int var4 = 0; var4 < var3; ++var4)
{
ItemStack var5 = var2[var4];
if (var5 != null && getEnchantmentLevel(par0Enchantment.effectId, var5) > 0)
{
return var5;
}
}
return null;
}
/**
* Returns the enchantability of itemstack, it's uses a singular formula for each index (2nd parameter: 0, 1 and 2),
* cutting to the max enchantability power of the table (3rd parameter)
*/
public static int calcItemStackEnchantability(Random par0Random, int par1, int par2, ItemStack par3ItemStack)
{
Item var4 = par3ItemStack.getItem();
int var5 = var4.getItemEnchantability();
if (var5 <= 0)
{
return 0;
}
else
{
if (par2 > 15)
{
par2 = 15;
}
int var6 = par0Random.nextInt(8) + 1 + (par2 >> 1) + par0Random.nextInt(par2 + 1);
return par1 == 0 ? Math.max(var6 / 3, 1) : (par1 == 1 ? var6 * 2 / 3 + 1 : Math.max(var6, par2 * 2));
}
}
/**
* Adds a random enchantment to the specified item. Args: random, itemStack, enchantabilityLevel
*/
public static ItemStack addRandomEnchantment(Random par0Random, ItemStack par1ItemStack, int par2)
{
List var3 = buildEnchantmentList(par0Random, par1ItemStack, par2);
boolean var4 = par1ItemStack.itemID == Item.book.itemID;
if (var4)
{
par1ItemStack.itemID = Item.field_92053_bW.itemID;
}
if (var3 != null)
{
Iterator var5 = var3.iterator();
while (var5.hasNext())
{
EnchantmentData var6 = (EnchantmentData)var5.next();
if (var4)
{
Item.field_92053_bW.func_92060_a(par1ItemStack, var6);
}
else
{
par1ItemStack.addEnchantment(var6.enchantmentobj, var6.enchantmentLevel);
}
}
}
return par1ItemStack;
}
/**
* Create a list of random EnchantmentData (enchantments) that can be added together to the ItemStack, the 3rd
* parameter is the total enchantability level.
*/
public static List buildEnchantmentList(Random par0Random, ItemStack par1ItemStack, int par2)
{
Item var3 = par1ItemStack.getItem();
int var4 = var3.getItemEnchantability();
if (var4 <= 0)
{
return null;
}
else
{
var4 /= 2;
var4 = 1 + par0Random.nextInt((var4 >> 1) + 1) + par0Random.nextInt((var4 >> 1) + 1);
int var5 = var4 + par2;
float var6 = (par0Random.nextFloat() + par0Random.nextFloat() - 1.0F) * 0.15F;
int var7 = (int)((float)var5 * (1.0F + var6) + 0.5F);
if (var7 < 1)
{
var7 = 1;
}
ArrayList var8 = null;
Map var9 = mapEnchantmentData(var7, par1ItemStack);
if (var9 != null && !var9.isEmpty())
{
EnchantmentData var10 = (EnchantmentData)WeightedRandom.getRandomItem(par0Random, var9.values());
if (var10 != null)
{
var8 = new ArrayList();
var8.add(var10);
for (int var11 = var7; par0Random.nextInt(50) <= var11; var11 >>= 1)
{
Iterator var12 = var9.keySet().iterator();
while (var12.hasNext())
{
Integer var13 = (Integer)var12.next();
boolean var14 = true;
Iterator var15 = var8.iterator();
while (true)
{
if (var15.hasNext())
{
EnchantmentData var16 = (EnchantmentData)var15.next();
if (var16.enchantmentobj.canApplyTogether(Enchantment.enchantmentsList[var13.intValue()]))
{
continue;
}
var14 = false;
}
if (!var14)
{
var12.remove();
}
break;
}
}
if (!var9.isEmpty())
{
EnchantmentData var17 = (EnchantmentData)WeightedRandom.getRandomItem(par0Random, var9.values());
var8.add(var17);
}
}
}
}
return var8;
}
}
/**
* Creates a 'Map' of EnchantmentData (enchantments) possible to add on the ItemStack and the enchantability level
* passed.
*/
public static Map mapEnchantmentData(int par0, ItemStack par1ItemStack)
{
Item var2 = par1ItemStack.getItem();
HashMap var3 = null;
boolean var4 = par1ItemStack.itemID == Item.book.itemID;
Enchantment[] var5 = Enchantment.enchantmentsList;
int var6 = var5.length;
for (int var7 = 0; var7 < var6; ++var7)
{
Enchantment var8 = var5[var7];
if (var8 != null && (var8.canApplyAtEnchantingTable(par1ItemStack) || var4))
{
for (int var9 = var8.getMinLevel(); var9 <= var8.getMaxLevel(); ++var9)
{
if (par0 >= var8.getMinEnchantability(var9) && par0 <= var8.getMaxEnchantability(var9))
{
if (var3 == null)
{
var3 = new HashMap();
}
var3.put(Integer.valueOf(var8.effectId), new EnchantmentData(var8, var9));
}
}
}
}
return var3;
}
}