using System;
using System.Buffers;
using System.Collections.Generic;
using AlicizaX.Runtime;
using UnityEngine;

namespace AlicizaX.UI.Runtime
{
    public abstract partial class UIBase:IEventListenerProxy
    {
        protected System.Object[] userDatas;

        public System.Object UserData
        {
            get
            {
                if (userDatas != null && userDatas.Length >= 1)
                {
                    return userDatas[0];
                }
                else
                {
                    return null;
                }
            }
        }

        public System.Object[] UserDatas => userDatas;

        /// <summary>
        /// UI实例资源对象。
        /// </summary>
        public GameObject gameObject { protected set; get; }

        /// <summary>
        /// 窗口位置组件。
        /// </summary>
        public Transform transform => gameObject.transform;

        /// <summary>
        /// 窗口矩阵位置组件。
        /// </summary>
        public RectTransform rectTransform => gameObject.transform as RectTransform;

        public virtual string AssetName { get; }
        public virtual bool Visible { set; get; }
        internal bool IsLoaded;

        protected virtual void OnBindUIComponents()
        {
        }

        protected virtual void OnInitlize()
        {
        }

        protected virtual void OnDestroy()
        {
        }

        protected virtual void OnRegisterEvent()
        {
        }

        protected virtual void OnOpen()
        {
        }

        protected virtual void OnClose()
        {
        }


        #region UIElement

        /// <summary>
        /// UI元素节点。
        /// </summary>
        protected UIBindComponent UIBindComponent;

        /// <summary>
        /// 检测UI元素节点。
        /// </summary>
        protected void InitBindComponent()
        {
            UIBindComponent = rectTransform.GetComponent<UIBindComponent>();
        }

        /// <summary>
        /// 获取子节点脚本。
        /// </summary>
        /// <typeparam name="T">子节点类型。</typeparam>
        /// <param name="index">子节点索引。</param>
        /// <returns>子节点脚本实例。</returns>
        protected T FChild<T>(int index) where T : Component
        {
            return UIBindComponent.FindChild<T>(index);
        }

        #endregion

        #region UIEvent

        public EventListenerProxy EventListener
        {
            get
            {
                if (_uiEventProxy == null)
                {
                    _uiEventProxy = ReferencePool.Acquire<EventListenerProxy>();
                }

                return _uiEventProxy;
            }
        }

        internal EventListenerProxy _uiEventProxy;

        protected void RemoveAllUIEvent()
        {
            if (_uiEventProxy != null)
            {
                _uiEventProxy.Clear();
            }
        }

        protected void DisposeEvent()
        {
            if (_uiEventProxy != null)
            {
                ReferencePool.Release(_uiEventProxy);
            }
        }

        #endregion
    }
}