using System;
using UnityEngine;

namespace AibisDream
{
    public class SpriteButton
    {
        private GameObject _self;
        private bool _isHold;
        private bool _isButtonActive;

        public event Action OnButtonDown;
        public event Action OnButtonUp;
        public event Action OnButtonHold;

        public SpriteButton(GameObject gameObject)
        {
            _self = gameObject;
            _isButtonActive = true;
        }
        
        /// <summary>
        /// 检查按钮
        /// </summary>
        /// <param name="self"></param>
        public void CheckButtonClick()
        {
            if (!_isButtonActive)
            {
                _isHold = false;
                return;
            }
            
            // 发射射线
            Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
            RaycastHit2D hit = Physics2D.Raycast(ray.origin, ray.direction);
            
            // 检查射线是否与当前按钮接触
            if (Input.GetMouseButton(0) && hit.collider && hit.collider.gameObject == _self)
            {
                // 按下
                if (!_isHold)
                {
                    OnButtonDown?.Invoke();
                }
                OnButtonHold?.Invoke();

                _isHold = true;
            }
            else
            {
                if (_isHold)
                {
                    OnButtonUp?.Invoke();
                }
                _isHold = false;
            }
        }
    }
}