#if UNITY_EDITOR
using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using UnityEditor;
using UnityEditor.SceneManagement;
using UnityEngine;

namespace RR.Common.InspectorOverrides
{
    public sealed class HierarchyBulkRenamerWindow : EditorWindow
    {
        private enum NamingScheme
        {
            SpaceParenthesis,
            Dot,
            Underscore
        }

        private struct NamingSettings
        {
            public NamingScheme Scheme;
            public int Digits;
            public bool StartsAtZero;
        }

        private string _baseName = "GameObject";
        private Vector2 _scrollPosition;

        [MenuItem("Tools/Hierarchy/Bulk Rename Selected")]
        private static void OpenWindow()
        {
            HierarchyBulkRenamerWindow window = GetWindow<HierarchyBulkRenamerWindow>();
            window.titleContent = new GUIContent("Bulk Rename");
            window.minSize = new Vector2(360f, 260f);
            window.Show();
        }

        private void OnEnable()
        {
            Selection.selectionChanged += Repaint;
        }

        private void OnDisable()
        {
            Selection.selectionChanged -= Repaint;
        }

        private void OnGUI()
        {
            List<GameObject> selectedObjects = GetSelectedHierarchyObjects();
            NamingSettings namingSettings = ReadProjectNamingSettings();

            EditorGUILayout.LabelField("Mass Rename Hierarchy Objects", EditorStyles.boldLabel);
            EditorGUILayout.Space(4f);

            using (new EditorGUILayout.VerticalScope(EditorStyles.helpBox))
            {
                EditorGUILayout.LabelField("Base Name", EditorStyles.miniBoldLabel);
                _baseName = EditorGUILayout.TextField(_baseName);
            }

            using (new EditorGUILayout.VerticalScope(EditorStyles.helpBox))
            {
                EditorGUILayout.LabelField("Project Numbering Settings", EditorStyles.miniBoldLabel);
                EditorGUILayout.LabelField("Scheme", NamingSchemeToText(namingSettings.Scheme));
                EditorGUILayout.LabelField("Digits", namingSettings.Digits.ToString());
                EditorGUILayout.LabelField("Starts At", namingSettings.StartsAtZero ? "0" : "1");
            }

            using (new EditorGUILayout.VerticalScope(EditorStyles.helpBox))
            {
                EditorGUILayout.LabelField("Selection", EditorStyles.miniBoldLabel);
                EditorGUILayout.LabelField($"Selected objects: {selectedObjects.Count}");

                string previewBaseName = string.IsNullOrWhiteSpace(_baseName) ? "GameObject" : _baseName.Trim();
                string previewName = BuildName(previewBaseName, namingSettings, 0);
                EditorGUILayout.LabelField("First preview", previewName);
            }

            EditorGUILayout.Space(4f);
            DrawSelectionPreview(selectedObjects, namingSettings);

            using (new EditorGUI.DisabledScope(selectedObjects.Count == 0))
            {
                if (GUILayout.Button("Rename Selected"))
                    RenameSelected(selectedObjects, namingSettings);
            }
        }

        private void DrawSelectionPreview(List<GameObject> selectedObjects, NamingSettings namingSettings)
        {
            EditorGUILayout.LabelField("Preview", EditorStyles.boldLabel);

            using (new EditorGUILayout.VerticalScope(EditorStyles.helpBox))
            {
                _scrollPosition = EditorGUILayout.BeginScrollView(_scrollPosition, GUILayout.MinHeight(120f));

                if (selectedObjects.Count == 0)
                {
                    EditorGUILayout.LabelField("No hierarchy objects selected.");
                }
                else
                {
                    string normalizedBaseName = string.IsNullOrWhiteSpace(_baseName) ? "GameObject" : _baseName.Trim();
                    for (int i = 0; i < selectedObjects.Count; i++)
                    {
                        string renamed = BuildName(normalizedBaseName, namingSettings, i);
                        EditorGUILayout.LabelField($"{selectedObjects[i].name} -> {renamed}");
                    }
                }

                EditorGUILayout.EndScrollView();
            }
        }

        private void RenameSelected(List<GameObject> selectedObjects, NamingSettings namingSettings)
        {
            if (selectedObjects.Count == 0)
                return;

            string normalizedBaseName = string.IsNullOrWhiteSpace(_baseName) ? "GameObject" : _baseName.Trim();

            Undo.RecordObjects(selectedObjects.ToArray(), "Bulk Rename Hierarchy Objects");

            for (int i = 0; i < selectedObjects.Count; i++)
            {
                GameObject gameObject = selectedObjects[i];
                if (gameObject == null)
                    continue;

                gameObject.name = BuildName(normalizedBaseName, namingSettings, i);

                if (gameObject.scene.IsValid())
                    EditorSceneManager.MarkSceneDirty(gameObject.scene);
            }

            EditorUtility.DisplayDialog(
                "Bulk Rename",
                $"Переименовано объектов: {selectedObjects.Count}",
                "OK");
        }

        private static List<GameObject> GetSelectedHierarchyObjects()
        {
            return Selection.gameObjects
                .Where(gameObject => gameObject != null && gameObject.scene.IsValid())
                .OrderBy(gameObject => GetHierarchySortKey(gameObject.transform))
                .ToList();
        }

        private static string GetHierarchySortKey(Transform target)
        {
            List<int> indices = new();
            Transform current = target;

            while (current != null)
            {
                indices.Add(current.GetSiblingIndex());
                current = current.parent;
            }

            indices.Reverse();
            return string.Join("/", indices.Select(index => index.ToString("D6")));
        }

        private static NamingSettings ReadProjectNamingSettings()
        {
            NamingSettings settings = new NamingSettings
            {
                Scheme = NamingScheme.SpaceParenthesis,
                Digits = 1,
                StartsAtZero = false
            };

            Type editorSettingsType = typeof(EditorSettings);

            PropertyInfo schemeProperty = editorSettingsType.GetProperty(
                "gameObjectNamingScheme",
                BindingFlags.Public | BindingFlags.Static);
            if (schemeProperty != null)
            {
                object value = schemeProperty.GetValue(null);
                if (value != null)
                    settings.Scheme = ParseNamingScheme(value.ToString());
            }

            PropertyInfo digitsProperty = editorSettingsType.GetProperty(
                "gameObjectNamingDigits",
                BindingFlags.Public | BindingFlags.Static);
            if (digitsProperty != null)
            {
                object value = digitsProperty.GetValue(null);
                if (value is int digits)
                    settings.Digits = Mathf.Max(1, digits);
            }

            PropertyInfo startsAtZeroProperty = editorSettingsType.GetProperty(
                "gameObjectNamingStartsAtZero",
                BindingFlags.Public | BindingFlags.Static);
            if (startsAtZeroProperty != null)
            {
                object value = startsAtZeroProperty.GetValue(null);
                if (value is bool startsAtZero)
                    settings.StartsAtZero = startsAtZero;
            }

            return settings;
        }

        private static NamingScheme ParseNamingScheme(string rawValue)
        {
            if (string.IsNullOrEmpty(rawValue))
                return NamingScheme.SpaceParenthesis;

            if (rawValue.IndexOf("dot", StringComparison.OrdinalIgnoreCase) >= 0)
                return NamingScheme.Dot;

            if (rawValue.IndexOf("underscore", StringComparison.OrdinalIgnoreCase) >= 0)
                return NamingScheme.Underscore;

            return NamingScheme.SpaceParenthesis;
        }

        private static string BuildName(string baseName, NamingSettings namingSettings, int sequenceIndex)
        {
            int displayIndex = namingSettings.StartsAtZero ? sequenceIndex : sequenceIndex + 1;
            string number = displayIndex.ToString($"D{Mathf.Max(1, namingSettings.Digits)}");

            return namingSettings.Scheme switch
            {
                NamingScheme.Dot => $"{baseName}.{number}",
                NamingScheme.Underscore => $"{baseName}_{number}",
                _ => $"{baseName} ({number})"
            };
        }

        private static string NamingSchemeToText(NamingScheme namingScheme)
        {
            return namingScheme switch
            {
                NamingScheme.Dot => "Dot",
                NamingScheme.Underscore => "Underscore",
                _ => "Space Parenthesis"
            };
        }
    }
}
#endif