// ===============================================================================
// ProjectNavigation - Navigation History for Unity Project Window
//
// Creator: Scove
// Last Updated: 2026-03-05
// Version: 1.1
//
// Purpose:
// This tool provides a navigation history for the Unity Project window, allowing
// users to quickly jump back and forward between previously visited folders.
//
// Key Features:
// 1. Tracks folder selection history automatically.
// 2. Supports Back and Forward navigation via menu items and shortcuts.
// 3. Pings the selected folder for quick visual identification.
//
// How to Use:
// 1. Place this script in an 'Editor' folder in your project.
// 2. Use Alt + Left Arrow to navigate Back.
// 3. Use Alt + Right Arrow to navigate Forward.
// ===============================================================================

using System.Collections.Generic;
using UnityEditor;
using UnityEngine;

namespace Editor
{
    public class ProjectNavigation : EditorWindow
    {
        private static List<string> history = new List<string>();
        private static int currentIndex = -1;
        private static string lastPath = "";

        // Store the current position when selecting a folder
        [InitializeOnLoadMethod]
        static void Init()
        {
            Selection.selectionChanged += OnSelectionChanged;
        }

        static void OnSelectionChanged()
        {
            if (Selection.activeObject != null)
            {
                string path = AssetDatabase.GetAssetPath(Selection.activeObject);
                
                // Only track if it's a valid folder and different from the last recorded path
                if (AssetDatabase.IsValidFolder(path) && path != lastPath)
                {
                    // If we are in the middle of history and perform a new "direct jump",
                    // clear the forward history (browser-style navigation)
                    if (currentIndex < history.Count - 1)
                    {
                        history.RemoveRange(currentIndex + 1, history.Count - (currentIndex + 1));
                    }

                    history.Add(path);
                    currentIndex++;
                    lastPath = path;
                }
            }
        }

        // Shortcut Alt + Left Arrow (Back)
        [MenuItem("Tools/Navigation/Back &LEFT")]
        static void Back()
        {
            if (currentIndex > 0)
            {
                currentIndex--;
                NavigateTo(history[currentIndex]);
            }
        }

        // Shortcut Alt + Right Arrow (Forward)
        [MenuItem("Tools/Navigation/Forward &RIGHT")]
        static void Forward()
        {
            if (currentIndex < history.Count - 1)
            {
                currentIndex++;
                NavigateTo(history[currentIndex]);
            }
        }

        static void NavigateTo(string path)
        {
            lastPath = path;
            Object obj = AssetDatabase.LoadAssetAtPath<Object>(path);
            Selection.activeObject = obj;
            EditorGUIUtility.PingObject(obj);
        }
    }
}