using UnityEngine;
using UnityEngine.Events;

public class MouseFingerEvent
{
    public Vector2 position;
    public int index;
}

public class MouseFinger : MonoBehaviour
{
    public UnityEvent<MouseFingerEvent> OnInputBegin;
    public UnityEvent<MouseFingerEvent> OnInputMove;
    public UnityEvent<MouseFingerEvent> OnInputEnd;

    void Update()
    {
        handleMouse(0);
        handleMouse(1);
        handleMouse(2);
        handleTouches();
    }

    private void handleTouches()
    {
        for (int finger = 0; finger < Input.touchCount; finger++)
        {
            var touch = Input.touches[finger];
            var ev = new MouseFingerEvent {
                position = touch.position,
                index = finger
            };
            if (touch.phase == TouchPhase.Began)
            {
                OnInputBegin.Invoke(ev) ;
            }
            if (touch.phase == TouchPhase.Began || touch.phase == TouchPhase.Moved)
            {
                OnInputMove.Invoke(ev);
            }
            if (touch.phase == TouchPhase.Ended)
            {
                OnInputEnd.Invoke(ev);
            }
        }
    }

    private void handleMouse(int button)
    {
        var ev = new MouseFingerEvent
        {
            position = Input.mousePosition,
            index = button
        };
        if (Input.GetMouseButtonDown(button))
        {
            OnInputBegin.Invoke(ev);
        }
        if(Input.GetMouseButton(button))
        {
            OnInputMove.Invoke(ev);
        }
        if (Input.GetMouseButtonUp(button))
        {
            OnInputEnd.Invoke(ev);
        }
    }
}