1.7.10 Code

package com.halestormxv.item.gifts;

import java.util.List;

import com.halestormxv.creativetabs.CelestialCraft_creativeTabs;
import com.halestormxv.entity.celestialBolt;
import com.halestormxv.lib.RefStrings;

import cpw.mods.fml.relauncher.Side;
import cpw.mods.fml.relauncher.SideOnly;
import net.minecraft.enchantment.Enchantment;
import net.minecraft.enchantment.EnchantmentHelper;
import net.minecraft.entity.Entity;
import net.minecraft.entity.EntityLivingBase;
import net.minecraft.entity.effect.EntityLightningBolt;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.entity.projectile.EntityArrow;
import net.minecraft.init.Items;
import net.minecraft.item.EnumAction;
import net.minecraft.item.EnumRarity;
import net.minecraft.item.Item;
import net.minecraft.item.ItemStack;
import net.minecraft.nbt.NBTTagCompound;
import net.minecraft.potion.Potion;
import net.minecraft.potion.PotionEffect;
import net.minecraft.util.ChatComponentTranslation;
import net.minecraft.util.DamageSource;
import net.minecraft.util.EnumChatFormatting;
import net.minecraft.world.World;
import net.minecraftforge.common.MinecraftForge;
import net.minecraftforge.event.entity.player.ArrowLooseEvent;

public class leoGift extends Item
{
    public  double powerCost;

    public leoGift()
    {
        this.setMaxStackSize(1);
        this.setTextureName(RefStrings.MODID + ":leo_gift");
        this.setMaxDamage(-1);
        this.setCreativeTab(CelestialCraft_creativeTabs.tabTools);
    }

    public boolean isDamageable()
    {
        return false;
    }

    @Override
    @SideOnly(Side.CLIENT)
    public EnumRarity getRarity(ItemStack par1ItemStack){
        return EnumRarity.uncommon;
    }

    @Override
    public boolean hasEffect(ItemStack par1ItemStack){
        return true;
    }

    @Override
    public void addInformation(ItemStack par1ItemStack, EntityPlayer par2EntityPlayer, List par3List, boolean par4)
    {
        par3List.add("");
        par3List.add(EnumChatFormatting.LIGHT_PURPLE + "An artifact from Leo, argued to be");
        par3List.add(EnumChatFormatting.LIGHT_PURPLE + "one of the most powerful spirits.");
        par3List.add(EnumChatFormatting.LIGHT_PURPLE + "True power is held within.");
        par3List.add("");
        par3List.add(EnumChatFormatting.UNDERLINE + "Calls down Celestial Power on surrounding enemies.");
        if (par1ItemStack.stackTagCompound != null)
        {
            String owner = par1ItemStack.stackTagCompound.getString("Artifact Bound To: ");
            int cooldownRemain = par1ItemStack.stackTagCompound.getInteger("Cooldown: ");
            if (owner.equals(par2EntityPlayer.getDisplayName()))
            {
                par3List.add((EnumChatFormatting.GREEN + "Bound To: " + owner));
                par3List.add((EnumChatFormatting.GREEN + "Cooldown: " + cooldownRemain));
            } else {
                par3List.add(EnumChatFormatting.RED + "This isn't your artifact.");
            }
        }
    }

    public double getUsageCost(EntityPlayer user)
    {
        powerCost = (float)(user.experienceLevel) / 4;
        return powerCost;
    }

    public int getMaxItemUseDuration(ItemStack itemstack)
    {
        return 72000;
    }

    public EnumAction getItemUseAction(ItemStack itemstack)
    {
        return EnumAction.block;
    }

    public void onPlayerStoppedUsing(ItemStack itemstack, World world, EntityPlayer player, int chargedTime)
    {
        int j = this.getMaxItemUseDuration(itemstack) - chargedTime;

        ArrowLooseEvent event = new ArrowLooseEvent(player, itemstack, j);
        MinecraftForge.EVENT_BUS.post(event);
        if (event.isCanceled())
        {
            return;
        }
        j = event.charge;

        if (itemstack.stackTagCompound.getInteger("Cooldown: ") == 0 )
        {
            powerCost = getUsageCost(player);
            player.addExperienceLevel((int)-powerCost);
            player.setItemInUse(itemstack, this.getMaxItemUseDuration(itemstack));
            if (j > 400){ j = 400;}
            j = Math.round(j / 40);
            List<EntityLivingBase> targetList = player.worldObj.getEntitiesWithinAABB(EntityLivingBase.class, player.boundingBox.expand(8.0F + j, 8.0F + j, 8.0F + j));
            for (EntityLivingBase targets : targetList)
            {
                if ( targets != null)
                {
                    if ( targets != player )
                    {
                        player.worldObj.spawnEntityInWorld(new EntityLightningBolt(world, targets.posX, targets.posY, targets.posZ) );
                        targets.clearActivePotions();
                        world.createExplosion(targets, targets.posX, targets.posY, targets.posZ, 3.2F + (j / 2), true);
                        targets.setHealth(targets.getHealth() - j);
                        world.playSoundAtEntity(targets, RefStrings.MODID + ":leo_gift_execute", 1.4F, 1.0F);
                    }
                }
            }
            itemstack.stackTagCompound.setInteger("Cooldown: ", 300);
        }else{
            player.addChatComponentMessage(new ChatComponentTranslation ("\u00A74This item is on cooldown."));
        }

    }

    public ItemStack onItemRightClick(ItemStack itemstack, World world, EntityPlayer player)
    {
        if ( player.capabilities.isCreativeMode || (player.experienceLevel > 8) )
        {
            if (!itemstack.hasTagCompound())
            {
                itemstack.setTagCompound(new NBTTagCompound());
                itemstack.stackTagCompound.setString("Artifact Bound To: ", player.getDisplayName());
                itemstack.stackTagCompound.setInteger("Cooldown: ", 0);
            }
            else if (itemstack.hasTagCompound())
            {
                String owner = itemstack.stackTagCompound.getString("Artifact Bound To: ");
                if (!owner.equals(player.getDisplayName()))
                {
                    player.addChatComponentMessage(new ChatComponentTranslation ("\u00A74You are not the owner of this Artifact!"));
                    return itemstack;
                }
            }
            if (itemstack.stackTagCompound.getInteger("Cooldown: ") == 0 )
            {
                player.setItemInUse(itemstack, this.getMaxItemUseDuration(itemstack));
                world.playSoundAtEntity(player, RefStrings.MODID + ":leo_gift_cast", 1.0F, 1.0F);

            }else{
                player.addChatComponentMessage(new ChatComponentTranslation ("\u00A74This item is on cooldown."));
            }
        }else{
            player.addChatComponentMessage(new ChatComponentTranslation ("\u00A74Not have enough Celestial Power to use Artifact."));
        }
        return itemstack;
    }

    public void onUpdate(ItemStack itemStack, World world, Entity entity, int par4, boolean par5)
    {
        EntityPlayer player = (EntityPlayer) entity;
        ItemStack equipped = player.getCurrentEquippedItem();
        if (itemStack.hasTagCompound() && itemStack.stackTagCompound.getInteger("Cooldown: ") > 0)
        {
            int cooldownCounter = itemStack.stackTagCompound.getInteger("Cooldown: ") - 1;
            itemStack.stackTagCompound.setInteger("Cooldown: ", cooldownCounter);
        }
    }



}