using TyphoonEvent;
using UnityEngine;

namespace TyphoonUI
{
    /// <summary>
    /// UI组件
    /// </summary>
    public abstract class UIComponent : MonoBehaviour, IScrollCell, IEventOperation

    {
        public UIObject ViewObject { get; private set; }

        /// <summary>
        /// 附加视图
        /// </summary>
        /// <param name="view"></param>
        internal virtual void Attach(UIObject view)
        {
            ViewObject = view;
            InitializeEventOperation();
            OnInitialize();
        }

        /// <summary>
        /// 初始化
        /// </summary>
        protected abstract void OnInitialize();

        /// <summary>
        /// 滚动视窗-更新数据
        /// </summary>
        /// <param name="index">数据索引</param>
        /// <param name="data">数据项</param>
        public virtual void UpdateContent(int index, object data)
        {
        }

        /// <summary>
        /// 滚动视窗-元素是否显示
        /// </summary>
        public virtual bool IsVisible => gameObject.activeSelf;

        /// <summary>
        /// 滚动视窗-激活/关闭元素
        /// </summary>
        public virtual void SetVisible(bool visible)
        {
            gameObject.SetActive(visible);
        }

        /// <summary>
        /// 滚动视窗- 元素节点
        /// </summary>
        public virtual Transform Root => transform;

        /// <summary>
        /// 滚动视窗- 构建时初始化
        /// </summary>
        public virtual void OnCellInitialize()
        {
        }

        /// <summary>
        /// 滚动视窗- 更新坐标
        /// </summary>
        public virtual void OnUpdatePosition(float scrollPosition, Vector3 localPosition, UIScrollView scrollView)
        {
            transform.localPosition = localPosition;
        }


        /// <summary>
        /// 销毁时触发
        /// </summary>
        protected virtual void OnDestroy()
        {
            ReleaseEventOperation();
        }

        /// <summary>
        /// 构建子面板
        /// </summary>
        protected T CreateSubPanel<T>(UIObject view) where T : UIPanel
        {
            var result = view.gameObject.AddComponent<T>();
            result.Attach(view);
            result.RootView.alpha = 0;
            result.RootView.blocksRaycasts = false;
            return result;
        }

        /// <summary>
        /// 构建子组件
        /// </summary>
        protected T CreateSubComponent<T>(UIObject view) where T : UIComponent
        {
            var result = view.gameObject.AddComponent<T>();
            result.Attach(view);
            return result;
        }


        #region 事件系统

        public EventOperation EventOperation { get; set; }
        public virtual IEventProxy[] EventProxies { get; } = null;

        private void InitializeEventOperation() => EventOperation.Register(this);

        /// <summary>
        /// 激活单个事件代理
        /// </summary>
        /// <typeparam name="T">消息类型</typeparam>
        protected void EnableEvent<T>() => EventOperation.Enable<T>();

        /// <summary>
        /// 关闭单个事件代理
        /// </summary>
        /// <typeparam name="T">消息类型</typeparam>
        protected void DisableEvent<T>() => EventOperation.Disable<T>();

        /// <summary>
        /// 开启所有事件代理
        /// </summary>
        protected void EnableAllEvent() => EventOperation.EnableAll();

        /// <summary>
        /// 关闭所有事件代理
        /// </summary>
        protected void DisableAllEvent() => EventOperation.DisableAll();

        /// <summary>
        /// 释放事件
        /// </summary>
        protected void ReleaseEventOperation() => EventOperation.Release();

        #endregion
    }
}