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

namespace FBXImporter
{
    public class FBXBatchDialog : EditorWindow
    {
        private class FBXEntry
        {
            public string    Path;
            public string    Name;
            public FBXSource Source;
            public bool      ShouldProcess = true;
        }

        private List<FBXEntry> _entries = new List<FBXEntry>();
        private Vector2        _scroll;

        public static void Show(List<string> fbxPaths)
        {
            var window = GetWindow<FBXBatchDialog>(true, "FBX Importer — New Assets", true);
            window.minSize = new Vector2(520, 320);

            foreach (var path in fbxPaths)
                window._entries.Add(new FBXEntry {
                    Path          = path,
                    Name          = Path.GetFileName(path),
                    Source        = FBXSourceDetector.Detect(path),
                    ShouldProcess = true,
                });

            window.ShowModal();
        }

        void OnGUI()
        {
            GUILayout.Space(10);
            GUILayout.Label($"{_entries.Count} new FBX detected", EditorStyles.boldLabel);
            GUILayout.Label("All files are registered. Check which ones to process.", EditorStyles.miniLabel);
            GUILayout.Space(8);

            // Header
            using (new EditorGUILayout.HorizontalScope(EditorStyles.toolbar))
            {
                GUILayout.Label("Process", GUILayout.Width(55));
                GUILayout.Label("File",    GUILayout.Width(200));
                GUILayout.Label("Source",  GUILayout.Width(70));
                GUILayout.Label("Path",    GUILayout.ExpandWidth(true));
            }

            // List
            _scroll = EditorGUILayout.BeginScrollView(_scroll, GUILayout.ExpandHeight(true));
            foreach (var entry in _entries)
            {
                using (new EditorGUILayout.HorizontalScope())
                {
                    entry.ShouldProcess = EditorGUILayout.Toggle(entry.ShouldProcess, GUILayout.Width(55));
                    var style = new GUIStyle(EditorStyles.label)
                        { normal = { textColor = entry.ShouldProcess ? Color.white : Color.gray } };
                    GUILayout.Label(entry.Name,                style,                GUILayout.Width(200));
                    GUILayout.Label(entry.Source.ToString(),   EditorStyles.miniLabel, GUILayout.Width(70));
                    GUILayout.Label(entry.Path,                EditorStyles.miniLabel, GUILayout.ExpandWidth(true));
                }
            }
            EditorGUILayout.EndScrollView();

            // Select all / none
            GUILayout.Space(4);
            using (new EditorGUILayout.HorizontalScope())
            {
                if (GUILayout.Button("All",  GUILayout.Width(60))) _entries.ForEach(e => e.ShouldProcess = true);
                if (GUILayout.Button("None", GUILayout.Width(60))) _entries.ForEach(e => e.ShouldProcess = false);
            }

            GUILayout.Space(8);

            // Actions
            using (new EditorGUILayout.HorizontalScope())
            {
                GUILayout.FlexibleSpace();

                if (GUILayout.Button("Skip all", GUILayout.Width(80)))
                { Close(); return; }

                int count = _entries.FindAll(e => e.ShouldProcess).Count;
                using (new EditorGUI.DisabledScope(count == 0))
                {
                    if (GUILayout.Button($"Process {count} FBX", GUILayout.Width(130)))
                    { ProcessSelected(); Close(); }
                }
            }
            GUILayout.Space(8);
        }

        void ProcessSelected()
        {
            foreach (var entry in _entries)
            {
                if (!entry.ShouldProcess) continue;
                FBXImportDialog.Show(entry.Path, entry.Source);
            }
        }
    }
}