Muramasa

package com.github.elrol.SwordsOfLegend.items;

import java.util.List;

import javax.annotation.Nullable;

import com.github.elrol.SwordsOfLegend.SwordsOfLegend;
import com.github.elrol.SwordsOfLegend.config.ConfigManager;
import com.github.elrol.SwordsOfLegend.materials.ToolMaterials;
import com.google.common.collect.HashMultimap;
import com.google.common.collect.Multimap;

import net.minecraft.client.util.ITooltipFlag;
import net.minecraft.creativetab.CreativeTabs;
import net.minecraft.entity.Entity;
import net.minecraft.entity.SharedMonsterAttributes;
import net.minecraft.entity.ai.attributes.AttributeModifier;
import net.minecraft.inventory.EntityEquipmentSlot;
import net.minecraft.item.ItemStack;
import net.minecraft.item.ItemSword;
import net.minecraft.nbt.NBTTagCompound;
import net.minecraft.world.World;

public class Muramasa extends ItemSword{

    protected String name = "muramasa";
    protected double souls;

    public Muramasa() {
        super(ToolMaterials.muramasa);
        setUnlocalizedName(name);
        setRegistryName(name);
    }

    public void registerItemModel() {
        SwordsOfLegend.proxy.registerItemRenderer(this, 0, name);
    }

    @Override
    public Muramasa setCreativeTab(CreativeTabs tab) {
        super.setCreativeTab(tab);
        return this;
    }

    @Override
    public Multimap<String, AttributeModifier> getItemAttributeModifiers(EntityEquipmentSlot equipmentSlot){
        Multimap<String, AttributeModifier> multimap = HashMultimap.<String, AttributeModifier>create();
        if (equipmentSlot == EntityEquipmentSlot.MAINHAND){
            multimap.put(SharedMonsterAttributes.ATTACK_DAMAGE.getName(), new AttributeModifier(ATTACK_DAMAGE_MODIFIER, "Weapon modifier", (double)ToolMaterials.muramasa.getAttackDamage() + getAttackMod(), 0));
            multimap.put(SharedMonsterAttributes.ATTACK_SPEED.getName(), new AttributeModifier(ATTACK_SPEED_MODIFIER, "Weapon modifier", -3.5D + getSpeedMod(), 0));
        }

        return multimap;
    }

    @Override
    public void onUpdate(ItemStack itemStack, World world, Entity entity, int par4, boolean par5) {
        //Update nbt data
        if(itemStack.hasTagCompound() && itemStack.getTagCompound().hasKey("souls")) {
            this.souls = itemStack.getTagCompound().getInteger("souls");
        } else {
            itemStack.setTagCompound(new NBTTagCompound());
            itemStack.getTagCompound().setInteger("souls", 0);
        }

    }

    @Override
    public void addInformation(ItemStack stack, @Nullable World worldIn, List<String> tooltip, ITooltipFlag flagIn){
        if(stack.hasTagCompound() && stack.getTagCompound().hasKey("souls")) {
            tooltip.add("Souls: " + stack.getTagCompound().getInteger("souls"));
        }
    }

    private double getAttackMod() {
        if(souls > 0) {
            if((double)(souls / ConfigManager.soulsPerDamage + super.getAttackDamage()) >= ConfigManager.maxSoulDamage) {
                return (double)ConfigManager.maxSoulDamage;
            } else {
                return (double)(souls / (double)ConfigManager.soulsPerDamage);
            }
        } else {
            return 0D;
        }
    }

    private double getSpeedMod() {
        if(souls > 0) {
            if((double)(souls / ConfigManager.soulsPerSpeed) - 3.5D >= ConfigManager.maxSoulSpeed) {
                return (double)ConfigManager.maxSoulSpeed;
            } else {
                return (double)(souls / (double)ConfigManager.soulsPerSpeed);
            }
        } else {
            return 0D;
        }
    }

}