using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Events;
using UnityEngine.EventSystems;
/*******************************************************************************
*Create By CG
*Function image双击还是单击响应
*******************************************************************************/
namespace CG.UTility
{
    public class ButtonExtension : MonoBehaviour,IPointerEnterHandler, IPointerClickHandler, IPointerDownHandler, IPointerUpHandler, IPointerExitHandler
    {
        public float pressDurationTime = 1;
        public bool responseOnceByPress = false;
        public float doubleClickIntervalTime = 0.25f;

        /// <summary>
        /// 双击
        /// </summary>
        public UnityEvent onDoubleClick = new UnityEvent();
        /// <summary>
        /// 长按
        /// </summary>
        public UnityEvent onPress = new UnityEvent();
        /// <summary>
        /// 点击
        /// </summary>
        public UnityEvent onClick = new UnityEvent();
        /// <summary>
        /// 悬浮
        /// </summary>
        public UnityEvent onCover = new UnityEvent();
        /// <summary>
        /// 离开
        /// </summary>
        public UnityEvent onExit = new UnityEvent();

        private bool isDown = false;
        private bool isPress = false;
        private float downTime = 0;

        private float clickIntervalTime = 0;
        private int clickTimes = 0;

        void Update()
        {
            if (isDown)
            {
                if (responseOnceByPress && isPress)
                {
                    return;
                }
                downTime += Time.deltaTime;
                if (downTime > pressDurationTime)
                {
                    isPress = true;
                    onPress.Invoke();
                }
            }
            if (clickTimes >= 1)
            {
                clickIntervalTime += Time.deltaTime;
                if (clickIntervalTime >= doubleClickIntervalTime)
                {
                    if (clickTimes >= 2)
                    {
                        onDoubleClick.Invoke();
                    }
                    else
                    {
                        onClick.Invoke();
                    }
                    clickTimes = 0;
                    clickIntervalTime = 0;
                }
            }
        }
        void IPointerEnterHandler.OnPointerEnter(PointerEventData eventData)
        {
            onCover?.Invoke();
        }

        void IPointerDownHandler.OnPointerDown(PointerEventData eventData)//鼠标按下
        {
            isDown = true;
            downTime = 0;
        }

        void IPointerUpHandler.OnPointerUp(PointerEventData eventData)//鼠标抬起
        {
            isDown = false;
        }

        void IPointerExitHandler.OnPointerExit(PointerEventData eventData)//指针出去
        {
            isDown = false;
            isPress = false;
            onExit?.Invoke();
        }

        void IPointerClickHandler.OnPointerClick(PointerEventData eventData)//按键按下时调用
        {
            if (!isPress)
            {
                //onClick.Invoke();
                clickTimes += 1;
            }
            else
                isPress = false;
        }

    }
}