package net.minecraft.world.effect;

import com.google.common.collect.Maps;
import java.util.Iterator;
import java.util.Map;
import java.util.Map.Entry;
import java.util.UUID;
import javax.annotation.Nullable;
import net.minecraft.SystemUtils;
import net.minecraft.core.IRegistry;
import net.minecraft.network.chat.ChatMessage;
import net.minecraft.network.chat.IChatBaseComponent;
import net.minecraft.world.damagesource.DamageSource;
import net.minecraft.world.entity.Entity;
import net.minecraft.world.entity.EntityLiving;
import net.minecraft.world.entity.ai.attributes.AttributeBase;
import net.minecraft.world.entity.ai.attributes.AttributeMapBase;
import net.minecraft.world.entity.ai.attributes.AttributeModifiable;
import net.minecraft.world.entity.ai.attributes.AttributeModifier;
import net.minecraft.world.entity.player.EntityHuman;

// CraftBukkit start
import net.minecraft.network.protocol.game.PacketPlayOutUpdateHealth;
import net.minecraft.server.level.EntityPlayer;
import org.bukkit.craftbukkit.event.CraftEventFactory;
import org.bukkit.event.entity.EntityRegainHealthEvent.RegainReason;
// CraftBukkit end

public class MobEffectList {

    private final Map<AttributeBase, AttributeModifier> attributeModifiers = Maps.newHashMap();
    private final MobEffectInfo category;
    private final int color;
    @Nullable
    private String descriptionId;

    @Nullable
    public static MobEffectList fromId(int i) {
        return (MobEffectList) IRegistry.MOB_EFFECT.fromId(i);
    }

    public static int getId(MobEffectList mobeffectlist) {
        return IRegistry.MOB_EFFECT.getId(mobeffectlist);
    }

    protected MobEffectList(MobEffectInfo mobeffectinfo, int i) {
        this.category = mobeffectinfo;
        this.color = i;
    }

    public void tick(EntityLiving entityliving, int i) {
        if (this == MobEffects.REGENERATION) {
            if (entityliving.getHealth() < entityliving.getMaxHealth()) {
                entityliving.heal(1.0F, RegainReason.MAGIC_REGEN); // CraftBukkit
            }
        } else if (this == MobEffects.POISON) {
            if (entityliving.getHealth() > 1.0F) {
                entityliving.damageEntity(CraftEventFactory.POISON, 1.0F);  // CraftBukkit - DamageSource.MAGIC -> CraftEventFactory.POISON
            }
        } else if (this == MobEffects.WITHER) {
            entityliving.damageEntity(DamageSource.WITHER, 1.0F);
        } else if (this == MobEffects.HUNGER && entityliving instanceof EntityHuman) {
            ((EntityHuman) entityliving).applyExhaustion(0.005F * (float) (i + 1), org.bukkit.event.entity.EntityExhaustionEvent.ExhaustionReason.HUNGER_EFFECT); // CraftBukkit - EntityExhaustionEvent
        } else if (this == MobEffects.SATURATION && entityliving instanceof EntityHuman) {
            if (!entityliving.level.isClientSide) {
                // CraftBukkit start
                EntityHuman entityhuman = (EntityHuman) entityliving;
                int oldFoodLevel = entityhuman.getFoodData().foodLevel;

                org.bukkit.event.entity.FoodLevelChangeEvent event = CraftEventFactory.callFoodLevelChangeEvent(entityhuman, i + 1 + oldFoodLevel);

                if (!event.isCancelled()) {
                    entityhuman.getFoodData().eat(event.getFoodLevel() - oldFoodLevel, 1.0F);
                }

                ((EntityPlayer) entityhuman).connection.sendPacket(new PacketPlayOutUpdateHealth(((EntityPlayer) entityhuman).getBukkitEntity().getScaledHealth(), entityhuman.getFoodData().foodLevel, entityhuman.getFoodData().saturationLevel));
                // CraftBukkit end
            }
        } else if ((this != MobEffects.HEAL || entityliving.dT()) && (this != MobEffects.HARM || !entityliving.dT())) {
            if (this == MobEffects.HARM && !entityliving.dT() || this == MobEffects.HEAL && entityliving.dT()) {
                entityliving.damageEntity(DamageSource.MAGIC, (float) (6 << i));
            }
        } else {
            entityliving.heal((float) Math.max(4 << i, 0), RegainReason.MAGIC); // CraftBukkit
        }

    }

    public void app