using UnityEditor;
using UnityEngine;

namespace AibisDream.SystemEditor
{
    public static class EditorKit
    {
        public static readonly GUIStyle BoldFont = new(EditorStyles.label)
        {
            fontStyle = FontStyle.Bold
        };

        public static int SortingLayerField(string label, int id)
        {
            // 先获取layer
            var layers = GetSortingLayerNames();
            // 将ID转为idx
            var idx = TransSortingLayer2Idx(id);

            var newIdx = EditorGUILayout.Popup(label, idx, layers);
            
            return TransIdx2SortingLayer(newIdx);
        }

        /// <summary>
        /// 使用 SerializedProperty 绘制 SortingLayer 下拉菜单（基于ID）
        /// </summary>
        /// <param name="label">显示的标签</param>
        /// <param name="property">存储排序层ID的 SerializedProperty（int 类型）</param>
        public static void SortingLayerField(GUIContent label, SerializedProperty property)
        {
            if (property == null || property.propertyType != SerializedPropertyType.Integer)
            {
                EditorGUILayout.HelpBox("Property must be an integer type for sorting layer ID.", MessageType.Error);
                return;
            }

            EditorGUI.BeginChangeCheck();
            
            // 获取所有排序层名称
            string[] sortingLayerNames = GetSortingLayerNames();
            // 将当前ID转为索引
            int currentId = property.intValue;
            int currentIndex = TransSortingLayer2Idx(currentId);
            
            // 显示下拉菜单
            int newIndex = EditorGUILayout.Popup(label, currentIndex, sortingLayerNames);
            
            // 如果选择了新的排序层，更新属性值为新的ID
            if (EditorGUI.EndChangeCheck() || newIndex != currentIndex)
            {
                int newId = TransIdx2SortingLayer(newIndex);
                property.intValue = newId;
            }
        }

        private static string[] GetSortingLayerNames()
        {
            // 获取所有 Sorting Layer 名称
            var layerCount = SortingLayer.layers.Length;
            var sortingLayerNames = new string[layerCount];
            for (var i = 0; i < layerCount; i++)
            {
                sortingLayerNames[i] = SortingLayer.layers[i].name;
            }
            return sortingLayerNames;
        }

        private static int TransSortingLayer2Idx(int id)
        {
            var layers = SortingLayer.layers;
            for (var i = 0; i < layers.Length; i++)
            {
                if (layers[i].id == id) return i;
            }

            return 0;
        }

        private static int TransIdx2SortingLayer(int idx)
        {
            if (idx < 0 || idx >= SortingLayer.layers.Length)
            {
                return SortingLayer.layers[0].id;
            }

            return SortingLayer.layers[idx].id;
        }
        
        public static void RecordObjectAndChildren(GameObject parent, string actionName)
        {
            Transform[] transforms = parent.GetComponentsInChildren<Transform>(true);
            Object[] objectsToUndo = new Object[transforms.Length];

            for (int i = 0; i < transforms.Length; i++)
            {
                objectsToUndo[i] = transforms[i].gameObject;
            }

            Undo.RegisterCompleteObjectUndo(objectsToUndo, actionName);
        }
    }
}