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

public class EntityEventBroker : MonoBehaviour
{
    public OrderedEvent<DamageArgs> OnOutgoingDamage = new OrderedEvent<DamageArgs>();

    public OrderedEvent<DamageArgs> OnIncomingDamage = new OrderedEvent<DamageArgs>();
}


// A robust, orderable event system for delegates with priority support
public class OrderedEvent<T>
{
    private class Subscriber
    {
        public int Priority;
        public Action<T> Handler;
    }

    private List<Subscriber> subscribers = new List<Subscriber>();

    public void Subscribe(Action<T> handler, int priority = 0)
    {
        if (handler == null) return;
        subscribers.Add(new Subscriber { Priority = priority, Handler = handler });
        subscribers.Sort((a, b) => a.Priority.CompareTo(b.Priority));
    }

    public void Unsubscribe(Action<T> handler)
    {
        subscribers.RemoveAll(s => s.Handler == handler);
    }

    public void Invoke(T args)
    {
        foreach (var sub in subscribers)
        {
            sub.Handler.Invoke(args);
        }
    }
}


//Example usage:

/*public class FireHelmetEffect : MonoBehaviour
{
    public EntityEventBroker broker;
    void OnEnable() {
        // Priority 10, runs after lower numbers
        broker.OnOutgoingDamage.Subscribe(OnModifyDamage, priority: 10);
    }
    void OnDisable() {
        broker.OnOutgoingDamage.Unsubscribe(OnModifyDamage);
    }
    void OnModifyDamage(DamageArgs args) {
        args.damageType = DamageType.Fire;
        args.currentValue *= 1.5f;
    }
}*/