#if UNITY_EDITOR
using System;
using Unity.Mathematics;
using UnityEngine;
using UnityEngine.UIElements;

namespace UguiToolkit.Editor
{
    public interface IEntity 
    {
        void ApplyTransform(Transform tf);
        bool IsInside(Transform tf);
        void ApplyData<T>(T ui) where T: MonoBehaviour;
        void InitPreview();
        void ShowSelectionImg(bool show);
        GameObject gameObject { get; }
    }

    public abstract class BaseEntity<T1,T2> : MonoBehaviour, IEntity where T1 : MonoBehaviour where T2 : LayoutInfo.ElementInfo
    {
        // ElementInfo
        private T2 m_elementInfo;
        private UnityEngine.UI.Image m_selectionImg;

        public T2 ElementInfo => m_elementInfo;
        public void ShowSelectionImg(bool show)
        {
            if (m_selectionImg)
            {
                m_selectionImg.gameObject.SetActive(show);
            }
        }


        public abstract void ApplyTransform(Transform tf);
        public abstract void InitPreview();
        protected abstract void OnApplyData(T1 ui);


        public bool IsInside(Transform tf)
        {
            var rect = ElementInfo.Rect;
            var pos = StageManager.Instance.PrefabContentsRoot.transform.InverseTransformPoint(new Vector3(tf.position.x, tf.position.y, 0));
            return rect.Contains(pos);
        }

        // 创建时调用
        public void SetData(T2 elementInfo)
        { 
            this.m_elementInfo = elementInfo;
            CreateSelectionImg();
        }

        public void ApplyData<T>(T ui) where T : MonoBehaviour
        {
            OnApplyData(ui as T1);
        }

        private void CreateSelectionImg()
        {
            var go = new GameObject("_selectionImg_", typeof(RectTransform));
            EntityHelper.UpdateHierarchyAndSceneVisibilityOfEntity(false, go);
            var tf = go.transform;
            tf.SetParent(transform);
            tf.localPosition = Vector3.zero;
            tf.localRotation = Quaternion.identity;
            tf.localScale = Vector3.one;

            var rtf = go.GetComponent<RectTransform>();
            rtf.sizeDelta = new Vector2(m_elementInfo.w, m_elementInfo.h);

            m_selectionImg = go.AddComponent<UnityEngine.UI.Image>();
            m_selectionImg.color = new Color(0, 1, 0, 0.2f);
        }
    }
}
#endif