using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.EventSystems;
using System;
using DG.Tweening;
using UnityEngine.UI;

namespace BF
{
    public enum UITouchEventType
    {
        Unknown = 0,
        Down,
        Drag,
        UpInside,
        UpOutside,
        DragCancelUp,
        Cancel,
        DragUp,
        DragDown,
        DragLeft,
        DragRight,
    }

    [RequireComponent(typeof(Graphic))]
    public class UITouchEvent : MonoBehaviour, IPointerDownHandler, IPointerUpHandler, IPointerEnterHandler, IPointerExitHandler, ICancelHandler
    {
        protected Action<int, float, float> luaFunc;
        [Header("是否播放点击动画")]
        public bool IsShowClickAnimation = true;
        private bool animationStart = false;
        private static float touchBeginScale = 0.95f;
        private Vector3 originScale;
        private Sequence sequence;
        private bool touchInsideButton = false;
        protected int currentPointerId = 0;
        private bool touching = false;
        protected bool enable = true;

        public static bool disableClickEvent = false;

#if UNITY_EDITOR
        private UITouchEventType touchEvent = UITouchEventType.Unknown;
#endif
        public void AddTouchEventListener(Action<int, float, float> func)
        {
            luaFunc = func;
            
        }

        public void RemoveEventListener()
        {
            luaFunc = null;
        }

        public void SetShowClickAnimation(bool isShow)
        {
            IsShowClickAnimation = isShow;
        }

        public bool GetShowClickAnimation()
        {
            return IsShowClickAnimation;
        }

        public void SetTouchEnable(bool enable)
        {
            this.enable = enable;
            if (enable)
            {
                touching = false;
            }
        }

        public void OnPointerDown(PointerEventData eventData)
        {
            if (!enable)
            {
                return;
            }
            if (touching)
            {
                return;
            }

#if UNITY_EDITOR
            touchEvent = UITouchEventType.Down;
#endif
            touching = true;
            currentPointerId = eventData.pointerId;
            touchInsideButton = true;
            PlayTouchBegin();
            if (luaFunc != null)
            {
                luaFunc((int)UITouchEventType.Down, eventData.position.x, eventData.position.y);
            }


        }

        public void OnPointerUp(PointerEventData eventData)
        {
            if (!enable)
            {
                return;
            }
            if (currentPointerId != eventData.pointerId)
            {
                return;
            }
#if UNITY_EDITOR
            if (touchInsideButton)
            {
                touchEvent = UITouchEventType.UpInside;
            }
            else
            {
                touchEvent = UITouchEventType.UpOutside;
            }
#endif
            PlayTouchEnd();

            if (luaFunc != null)
            {
                if (!eventData.dragging)
                {
                    if (touchInsideButton)
                    {
                        if (!disableClickEvent)
                        {
                            luaFunc((int)UITouchEventType.UpInside, eventData.position.x, eventData.position.y);
                        }
                    }
                    else
                    {
                        luaFunc((int)UITouchEventType.UpOutside, eventData.position.x, eventData.position.y);
                    }
                }
                else
                {
                    luaFunc((int)UITouchEventType.DragCancelUp, eventData.position.x, eventData.position.y);
                }
            }
            touching = false;
        }

        public void OnPointerEnter(PointerEventData eventData)
        {
            if (!enable)
            {
                return;
            }
            if (currentPointerId != eventData.pointerId)
            {
                return;
            }
            if (!ReferenceEquals(eventData.pointerPress, eventData.pointerEnter))
            {
                return;
            }
#if UNITY_EDITOR
            if (touchEvent != UITouchEventType.Down)
            {
                return;
            }
#endif
            touchInsideButton = true;
            PlayTouchBegin();
        }

        public void OnPointerExit(PointerEventData eventData)
        {
            if (!enable)
            {
                return;
            }
            if (currentPointerId != eventData.pointerId)
            {
                return;
            }
            if (!ReferenceEquals(eventData.pointerPress, eventData.pointerEnter))
            {
                return;
            }
#if UNITY_EDITOR
            if (touchEvent != UITouchEventType.Down)
            {
                return;
            }
#endif
            touchInsideButton = false;
            PlayTouchEnd();
        }

        public void OnCancel(BaseEventData eventData)
        {
            if (!enable)
            {
                return;
            }
#if UNITY_EDITOR
            touchEvent = UITouchEventType.Cancel;
#endif
            PlayTouchEnd();
            if (luaFunc != null)
            {
                luaFunc((int)UITouchEventType.Cancel, 0.0f, 0.0f);
            }
            touching = false;
        }

        private void PlayTouchBegin()
        {
            if (!IsShowClickAnimation)
            {
                return;
            }
            if (animationStart)
            {
                return;
            }
            animationStart = true;
            if (sequence != null && sequence.IsPlaying())
            {
                sequence.Pause();
                if (!ReferenceEquals(originScale, null))
                {
                    this.transform.localScale = originScale;
                }
            }
            if (originScale != this.transform.localScale)
            {
                originScale = this.transform.localScale;
                if (sequence != null)
                {
                    sequence.Kill();
                    sequence = null;
                }
            }
            this.transform.localScale = originScale * touchBeginScale;
        }

        private void PlayTouchEnd()
        {
            if (!IsShowClickAnimation)
            {
                return;
            }

            if (!animationStart)
            {
                return;
            }

            animationStart = false;
            if (sequence == null)
            {
                if (ReferenceEquals(originScale, null))
                {
                    originScale = this.transform.localScale;
                }
                sequence = DOTween.Sequence().Append(
                    transform.DOScale(originScale * 1.05f, 0.08f).SetEase(Ease.InOutSine)
                ).Append(
                    transform.DOScale(originScale * 0.96f, 0.08f).SetEase(Ease.InOutSine)
                ).Append(
                    transform.DOScale(originScale, 0.08f).SetEase(Ease.InOutSine)
                );
                sequence.SetAutoKill(false);
            }
            else
            {
                sequence.Restart();
            }
        }

        void OnDestroy()
        {
            luaFunc = null;
            if (sequence != null)
            {
                sequence.Kill();
                sequence = null;
            }
        }
    }
}