ActuallyAdditions/src/main/java/de/ellpeck/actuallyadditions/mod/tile/TileEntityXPSolidifier.java

/*
 * This file ("TileEntityXPSolidifier.java") is part of the Actually Additions mod for Minecraft.
 * It is created and owned by Ellpeck and distributed
 * under the Actually Additions License to be found at
 * http://ellpeck.de/actaddlicense
 * View the source code at https://github.com/Ellpeck/ActuallyAdditions
 *
 * © 2015-2016 Ellpeck
 */

package de.ellpeck.actuallyadditions.mod.tile;


import de.ellpeck.actuallyadditions.mod.items.InitItems;
import de.ellpeck.actuallyadditions.mod.items.ItemSolidifiedExperience;
import de.ellpeck.actuallyadditions.mod.network.gui.IButtonReactor;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.item.ItemStack;
import net.minecraft.nbt.NBTTagCompound;
import net.minecraft.util.EnumFacing;

public class TileEntityXPSolidifier extends TileEntityInventoryBase implements IButtonReactor{

    private final int[] buttonAmounts = new int[]{1, 5, 10, 20, 30, 40, 50, 64, -999};
    public short amount;
    private short lastAmount;

    public TileEntityXPSolidifier(){
        super(1, "xpSolidifier");
    }

    @Override
    public void writeSyncableNBT(NBTTagCompound compound, boolean sync){
        super.writeSyncableNBT(compound, sync);
        compound.setShort("Amount", this.amount);
    }

    @Override
    public void readSyncableNBT(NBTTagCompound compound, boolean sync){
        super.readSyncableNBT(compound, sync);
        this.amount = compound.getShort("Amount");
    }

    @Override
    public void updateEntity(){
        super.updateEntity();
        if(!this.worldObj.isRemote){
            if(this.amount > 0){
                if(this.slots[0] == null){
                    int toSet = this.amount > 64 ? 64 : this.amount;
                    this.slots[0] = new ItemStack(InitItems.itemSolidifiedExperience, toSet);
                    this.amount -= toSet;
                }
                else if(this.slots[0].stackSize < 64){
                    int needed = 64-this.slots[0].stackSize;
                    int toAdd = this.amount > needed ? needed : this.amount;
                    this.slots[0].stackSize += toAdd;
                    this.amount -= toAdd;
                }
            }

            if(this.lastAmount != this.amount && this.sendUpdateWithInterval()){
                this.lastAmount = this.amount;
            }
        }
    }

    @Override
    public boolean isItemValidForSlot(int i, ItemStack stack){
        return false;
    }

    @Override
    public boolean canInsertItem(int slot, ItemStack stack, EnumFacing side){
        return this.isItemValidForSlot(slot, stack);
    }

    @Override
    public boolean canExtractItem(int slot, ItemStack stack, EnumFacing side){
        return true;
    }

    @Override
    public void onButtonPressed(int buttonID, EntityPlayer player){
        if(buttonID < this.buttonAmounts.length){
            if(getPlayerXP(player) > 0){
                int xp = this.buttonAmounts[buttonID] == -999 ? getPlayerXP(player)/ItemSolidifiedExperience.SOLID_XP_AMOUNT : this.buttonAmounts[buttonID];
                if(this.amount < Short.MAX_VALUE-xp && getPlayerXP(player) >= ItemSolidifiedExperience.SOLID_XP_AMOUNT*xp){
                    addPlayerXP(player, -(ItemSolidifiedExperience.SOLID_XP_AMOUNT*xp));
                    if(!this.worldObj.isRemote){
                        this.amount += xp;
                    }
                }
            }
        }
    }

    /*
     * The below methods were excerpted from EnderIO by SleepyTrousers with permission, thanks!
     */

    private static final Integer[] XP_MAP = new Integer[256];

    static{
        for(int i = 0; i < XP_MAP.length; i++){
            XP_MAP[i] = getExperienceForLevelImpl(i);
        }
    }

    public static int getExperienceForLevel(int level){
        if(level >= 0 && level < XP_MAP.length){
            return XP_MAP[level];
        }
        if(level >= 21863){
            return Integer.MAX_VALUE;
        }
        return getExperienceForLevelImpl(level);
    }

    private static int getExperienceForLevelImpl(int level){
        int res = 0;
        for(int i = 0; i < level; i++){
            res += getXpBarCapacity(i);
            if(res < 0){
                return Integer.MAX_VALUE;
            }
        }
        return res;
    }

    public static int getXpBarCapacity(int level){
        if(level >= 30){
            return 112+(level-30)*9;
        }
        else if(level >= 15){
            return 37+(level-15)*5;
        }
        return 7+level*2;
    }

    public static int getLevelForExperience(int experience){
        for(int i = 0; i < XP_MAP.length; i++){
            if(XP_MAP[i] > experience){
                return i-1;
            }
        }
        int i = XP_MAP.length;
        while(getExperienceForLevel(i) <= experience){
            i++;
        }
        return i-1;
    }

    public static int getPlayerXP(EntityPlayer player){
        return (int)(getExperienceForLevel(player.experienceLevel)+(player.experience*player.xpBarCap()));
    }

    public static void addPlayerXP(EntityPlayer player, int amount){
        int experience = Math.max(0, getPlayerXP(player)+amount);
        player.experienceTotal = experience;
        player.experienceLevel = getLevelForExperience(experience);
        int expForLevel = getExperienceForLevel(player.experienceLevel);
        player.experience = (float)(experience-expForLevel)/(float)player.xpBarCap();
    }
}