using UnityEngine;
using UnityEngine.EventSystems;
using System;

namespace Game
{
	public class CameraScroller : MonoBehaviour, IBeginDragHandler, IDragHandler, IEndDragHandler
    {
        public bool isDragging { get; private set; }

        float _yMax = 4.5f;
        float _yMin = -1f;

        public void OnBeginDrag(PointerEventData eventData)
        {
            isDragging = true;
        }

        public void OnDrag(PointerEventData eventData)
        {
            var main_cam = Camera.main;

            if (main_cam != null)
            {
                var pos = main_cam.transform.position;
                var new_y = pos.y;
                new_y -= eventData.delta.y * 0.01f;
                pos.y = Mathf.Clamp(new_y, _yMin, _yMax);

                main_cam.transform.position = pos;
            }
        }

        public void OnEndDrag(PointerEventData eventData)
        {
            isDragging = false;
        }

        public void OnPointerClick(PointerEventData eventData)
        {
            throw new NotImplementedException();
        }
    }
}