Unity_ItemExample

////////Item script//////////////////////////////////////
using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Item
{
    public string Name = "None";
    public string Description = "Please add description";

    //Using an array allows the item to be used on any amount of targers, including 0, 1 and 10000
    GameObject[] Targets;
    //The effect is a abstract class
    public ItemEffect Effect = null;

    public Item(string NewName, string NewDescription , ItemEffect NewEffect)
    {
        Name = NewName;
        Description = NewDescription;
        Effect = NewEffect;
    }

    public void OnUse()
    {
        Effect.Use(Targets);
    }

}

////////Item Effect//////////////////////////////////////

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public abstract class ItemEffect
{
    public abstract void Use(GameObject[] Targets);
};

//The All items class is just to keep things organized
public class AllItemEffects
{
    public class HealingTargets : ItemEffect
    {
        int Healing = 20;
        public HealingTargets(int Amount)
        {
            Healing = Amount;
        }

        public override void Use(GameObject[] Targets)
        {
            foreach (GameObject Target in Targets)
            {
                Target.GetComponent<DudHealthSystem>().ChangeHealth(Healing);
            }
        }
    }

    public class DamageTargets : ItemEffect
    {
        int Damage = 20;
        public DamageTargets(int Amount)
        {
            Damage = Amount;
        }

        public override void Use(GameObject[] Targets)
        {
            foreach (GameObject Target in Targets)
            {
                Target.GetComponent<DudHealthSystem>().ChangeHealth(-Damage);
            }
        }
    }
}

////////Dud Health System//////////////////////////////////////
using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class DudHealthSystem : MonoBehaviour
{
    //Just a placeholder health system
    int MaxHP = 100;
    int HP = 100;

    public void ChangeHealth(int Amount)
    {
        HP = Mathf.Clamp(HP + Amount, 0, MaxHP);
    }
}