using System.Collections.Generic;
using UnityEngine;
using UnityEngine.EventSystems;
using System;
using UnityEngine.UI;
using AudioType = AlicizaX.Audio.Runtime.AudioType;

namespace AlicizaX.UI.Extension
{
    public enum ButtonSoundType
    {
        Down,
        Up,
        Click,
        Enter,
        Exit,
        Drag
    }

    [Serializable]
    public class ButtonSoundCell
    {
        public ButtonSoundType ButtonSoundType = ButtonSoundType.Click;
        public string ButtonUISoundName = "";
    }

    public delegate void ButtonBeginDragCallback(PointerEventData eventData);

    public delegate void ButtonDragCallback(PointerEventData eventData);

    public delegate void ButtonEndDragCallback(PointerEventData eventData);

    public class UIButtonSuper : Button, IBeginDragHandler, IDragHandler, IEndDragHandler
    {
        public List<ButtonSoundCell> m_ButtonUISounds = new List<ButtonSoundCell>();

        [Tooltip("是否可以点击")] public bool m_CanClick = true;
        [Tooltip("是否可以双击")] public bool m_CanDoubleClick = false;
        [Tooltip("双击间隔时长")] public float m_DoubleClickIntervalTime = 0.1f;
        [Tooltip("双击事件")] public ButtonClickedEvent onDoubleClick;
        [Tooltip("是否可以长按")] public bool m_CanLongPress = false;
        [Tooltip("长按是否只响应一次")] public bool m_ResponseOnceByPress = false;
        [Tooltip("长按满足间隔")] public float m_LongPressDurationTime = 1;

        [Tooltip("长按事件")] public ButtonClickedEvent onPress;

        //public ButtonClickedEvent onClick;
        public ButtonBeginDragCallback onBeginDrag;
        public ButtonDragCallback onDrag;
        public ButtonEndDragCallback onEndDrag;

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

        private int fingerId = int.MinValue;

        public bool IsDraging
        {
            get { return fingerId != int.MinValue; }
        } //摇杆拖拽状态

        public int FingerId
        {
            get { return fingerId; }
        }

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

        void Update()
        {
            if (isDown)
            {
                if (!m_CanLongPress)
                {
                    return;
                }

                if (m_ResponseOnceByPress && isPress)
                {
                    return;
                }

                downTime += Time.deltaTime;
                if (downTime > m_LongPressDurationTime)
                {
                    isPress = true;
                    onPress.Invoke();
                }
            }

            if (clickTimes >= 1)
            {
                if (!m_CanLongPress && !m_CanDoubleClick && m_CanClick)
                {
                    onClick.Invoke();
                    clickTimes = 0;
                }
                else
                {
                    clickIntervalTime += Time.deltaTime;
                    if (clickIntervalTime >= m_DoubleClickIntervalTime)
                    {
                        if (clickTimes >= 2)
                        {
                            if (m_CanDoubleClick)
                            {
                                onDoubleClick.Invoke();
                            }
                        }
                        else
                        {
                            if (m_CanClick)
                            {
                                onClick.Invoke();
                            }
                        }

                        clickTimes = 0;
                        clickIntervalTime = 0;
                    }
                }
            }
        }

        /// <summary>
        /// 是否按钮按下
        /// </summary>
        public bool IsDown
        {
            get { return isDown; }
        }

        /// <summary>
        /// 是否按钮长按
        /// </summary>
        public bool IsPress
        {
            get { return isPress; }
        }

        /// <summary>
        /// 是否按钮按下后离开按钮位置
        /// </summary>
        public bool IsDownExit
        {
            get { return isDownExit; }
        }

        public ButtonSoundCell GetButtonSound(ButtonSoundType buttonSoundType)
        {
            foreach (var buttonSound in m_ButtonUISounds)
            {
                if (buttonSound.ButtonSoundType == buttonSoundType)
                {
                    return buttonSound;
                }
            }

            return null;
        }

        private void PlayButtonSound(ButtonSoundType buttonSoundType)
        {
            ButtonSoundCell buttonSound = GetButtonSound(buttonSoundType);
            if (buttonSound == null)
            {
                return;
            }

            GameApp.Audio.Play(AudioType.UISound, buttonSound.ButtonUISoundName, false, GameApp.Audio.UISoundVolume, true);
        }

        public override void OnPointerEnter(PointerEventData eventData)
        {
            base.OnPointerEnter(eventData);
            PlayButtonSound(ButtonSoundType.Enter);
        }

        public override void OnPointerDown(PointerEventData eventData)
        {
            base.OnPointerDown(eventData);
            if (eventData.pointerId < -1 || IsDraging) return; //适配 Touch：只响应一个Touch；适配鼠标：只响应左键
            fingerId = eventData.pointerId;
            isDown = true;
            isDownExit = false;
            downTime = 0;
            PlayButtonSound(ButtonSoundType.Down);
        }

        public override void OnPointerUp(PointerEventData eventData)
        {
            base.OnPointerUp(eventData);
            if (fingerId != eventData.pointerId) return; //正确的手指抬起时才会；
            fingerId = int.MinValue;
            isDown = false;
            isDownExit = true;
            PlayButtonSound(ButtonSoundType.Up);
        }

        public override void OnPointerExit(PointerEventData eventData)
        {
            base.OnPointerExit(eventData);
            if (fingerId != eventData.pointerId) return; //正确的手指抬起时才会；
            isPress = false;
            isDownExit = true;
            PlayButtonSound(ButtonSoundType.Exit);
        }

        public override void OnPointerClick(PointerEventData eventData)
        {
            if (!isPress)
            {
                clickTimes += 1;
            }
            else
                isPress = false;

            PlayButtonSound(ButtonSoundType.Click);
        }

        public void OnBeginDrag(PointerEventData eventData)
        {
            onBeginDrag?.Invoke(eventData);
        }

        public void OnDrag(PointerEventData eventData)
        {
            PlayButtonSound(ButtonSoundType.Drag);
            onDrag?.Invoke(eventData);
        }

        public void OnEndDrag(PointerEventData eventData)
        {
            onEndDrag?.Invoke(eventData);
        }
    }
}