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

namespace Beyond
{

    public class WaveTouchController : MonoBehaviour, IPointerDownHandler, IPointerUpHandler, IDragHandler
    {
        private Vector2 m_startPoint;
        private Vector2 m_currentPoint;
        private Vector2 m_normalizedPos;
        private RectTransform m_rect;
        public UnityEvent<Vector2> OnChange;

        void UpdatePos()
        {

        }

        public void OnDrag(PointerEventData eventData)
        {
            RectTransformUtility.ScreenPointToLocalPointInRectangle(m_rect, eventData.position, eventData.pressEventCamera, out m_currentPoint);
            m_normalizedPos = 2f * m_currentPoint / m_rect.rect.size;
            Debug.Log($"Current pos: {m_normalizedPos}");
            OnChange.Invoke(m_normalizedPos);
        }

        public void OnPointerDown(PointerEventData eventData)
        {
            RectTransformUtility.ScreenPointToLocalPointInRectangle(m_rect, eventData.position, eventData.pressEventCamera, out m_currentPoint);
            m_startPoint = m_currentPoint;
            m_normalizedPos = 2f * m_currentPoint / m_rect.rect.size;
            Debug.Log($"Current pos: {m_normalizedPos}");
            OnChange.Invoke(m_normalizedPos);
        }

        public void OnPointerUp(PointerEventData eventData)
        {
            RectTransformUtility.ScreenPointToLocalPointInRectangle(m_rect, eventData.position, eventData.pressEventCamera, out m_currentPoint);
        }

        // Start is called before the first frame update
        void Start()
        {
            m_rect = GetComponent<RectTransform>();
        }

        // Update is called once per frame
        void Update()
        {

        }
    }
}