using AibisDream;
using UnityEditor;
using UnityEngine;

namespace AibisDream.SystemEditor
{
    public class ChapterGraphInspector
    {
        private Editor _editor;
        private TalkSceneSO _target;
        private Vector2 _scrollPosition;

        public event System.Action<TalkSceneSO> OnColorChanged;

        public void SetTarget(TalkSceneSO so)
        {
            // 不能用 ==，Unity 重载了 ==，已销毁的对象 == null 为 true
            if (ReferenceEquals(_target, so)) return;

            _target = so;
            if (_editor != null)
            {
                Object.DestroyImmediate(_editor);
                _editor = null;
            }

            if (so != null)
            {
                _editor = Editor.CreateEditor(so);
            }
        }

        public void OnGUI()
        {
            if (_editor == null)
            {
                EditorGUILayout.HelpBox("请在图中选中一个章节节点以编辑属性", MessageType.Info);
                return;
            }

            _scrollPosition = EditorGUILayout.BeginScrollView(_scrollPosition);

            EditorGUI.BeginChangeCheck();
            var newColor = EditorGUILayout.ColorField("节点颜色", _target.nodeColor);
            if (EditorGUI.EndChangeCheck())
            {
                Undo.RecordObject(_target, "Change Node Color");
                _target.nodeColor = newColor;
                EditorUtility.SetDirty(_target);
                OnColorChanged?.Invoke(_target);
            }

            EditorGUILayout.Space(6);

            _editor.OnInspectorGUI();
            EditorGUILayout.EndScrollView();
        }

        public void Destroy()
        {
            if (_editor != null)
            {
                Object.DestroyImmediate(_editor);
                _editor = null;
            }

            _target = null;
        }
    }
}