using System;
using System.Reflection;
using UnityEngine;
using UnityEngine.UI;

namespace AlicizaX.UI.Runtime
{
    public abstract class UIWindow : UIBase
    {
        internal void BindUIHolder(GameObject holderObject)
        {
            if (_state != UIState.CreatedUI)
                throw new InvalidOperationException("UI already Created");

            var holder = (UIHolderObjectBase)holderObject.GetComponent(UIHolderType);

            if (holder == null)
            {
                throw new InvalidCastException($"资源{holderObject.name}上不存在{UIHolderType.FullName}");
            }

            Holder = holder;
            _canvas = Holder.transform.GetComponent<Canvas>();
            _raycaster = Holder.transform.GetComponent<GraphicRaycaster>();
            Holder.RectTransform.localPosition = Vector3.zero;
            Holder.RectTransform.pivot = new Vector2(0.5f, 0.5f);
            Holder.RectTransform.anchorMin = Vector2.zero;
            Holder.RectTransform.anchorMax = Vector2.one;
            Holder.RectTransform.offsetMin = Vector2.zero;
            Holder.RectTransform.offsetMax = Vector2.zero;
            Holder.RectTransform.localScale = Vector3.one;
            _state = UIState.Loaded;
        }
    }

    public abstract class UIWindow<T> : UIWindow where T : UIHolderObjectBase
    {
        protected T baseui => (T)Holder;

        internal override Type UIHolderType => typeof(T);
    }
}