using UnityEngine;
using UnityEngine.InputSystem;
using UnityEngine.InputSystem.EnhancedTouch;

[DefaultExecutionOrder(-1)]
public class InputManager : Singleton<InputManager>
{
    private TouchControls touchControls;

    public delegate void StartTouch(Vector2 position, float time);
    public event StartTouch OnStartTouch;
    public delegate void EndTouch(Vector2 position, float time);
    public event EndTouch OnEndTouch;

    private Camera mainCamera;

    private void Awake()
    {
        touchControls = new TouchControls();
        mainCamera = Camera.main;
    }

    private void OnEnable()
    {
        touchControls.Enable();
    }

    private void OnDisable()
    {
        touchControls.Disable();
    }

    private void Start()
    {
        touchControls.Touch.TouchPress.started += ctx => StartTouchPrimary(ctx);
        touchControls.Touch.TouchPress.canceled += ctx => EndTouchPrimary(ctx);
    }

    private void StartTouchPrimary(InputAction.CallbackContext context)
    {
        if(OnStartTouch != null)
        {
            OnStartTouch(Ultils.ScreenToWorld(mainCamera, touchControls.Touch.TouchPosition.ReadValue<Vector2>()), (float)context.startTime);
        }
    }

    private void EndTouchPrimary(InputAction.CallbackContext context)
    {
        if (OnEndTouch != null)
        {
            OnEndTouch(Ultils.ScreenToWorld(mainCamera, touchControls.Touch.TouchPosition.ReadValue<Vector2>()), (float)context.time);
        }
    }

    public Vector2 PrimaryPosition()
    {
        return Ultils.ScreenToWorld(mainCamera, touchControls.Touch.TouchPosition.ReadValue<Vector2>());
    }
}