using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Events;
using UnityEngine.EventSystems;
public class EventSystemHandler : MonoBehaviour, IPointerDownHandler, IPointerUpHandler, IDragHandler, IPointerExitHandler
{
    // public bool MouseOnly = false;

    [System.Serializable]
    public class PointerEvent : UnityEvent<PointerEventData> { };

    public PointerEvent onPointerDown = new PointerEvent();
    public PointerEvent onPointerUp = new PointerEvent();
    public PointerEvent onPointerDrag = new PointerEvent();
    public PointerEvent onPointerExit = new PointerEvent();

    public void OnPointerDown(PointerEventData eventData)
    {
        LogPointerEvent(eventData);
        onPointerDown.Invoke(eventData);
    }

    public void OnPointerUp(PointerEventData eventData)
    {
        LogPointerEvent(eventData);
        onPointerUp.Invoke(eventData);
    }

    public void OnDrag(PointerEventData eventData)
    {
        LogPointerEvent(eventData);
        onPointerDrag.Invoke(eventData);
    }

    public void OnPointerExit(PointerEventData eventData)
    {
        LogPointerEvent(eventData);
        // if (skip_on_mouse_only(eventData))
        //     return;
        onPointerExit.Invoke(eventData);
    }

    void LogPointerEvent(PointerEventData eventData)
    {
        // Debug.Log(eventData);
    }

    // private bool skip_on_mouse_only(PointerEventData eventData)
    // {
    //     return MouseOnly && eventData.pointerId != -1;
    // }
}