#if UNITY_EDITOR
using System;
using System.Collections.Generic;
using System.IO;
using UnityEditor;
using UnityEngine;
using OnDeviceAgent.Inference;
namespace OnDeviceAgent.AgentCore.Editor
{

    [CustomPropertyDrawer(typeof(VoiceStyleDropdownAttribute))]
    public sealed class VoiceStyleDropdownDrawer : PropertyDrawer
    {
        static readonly string[] DefaultStyles = { "F1", "F2", "F3", "F4", "F5", "M1", "M2", "M3", "M4", "M5" };

        static readonly Dictionary<string, string[]> s_Cache = new Dictionary<string, string[]>();
        static readonly Dictionary<string, double> s_CacheAt = new Dictionary<string, double>();
        const double CacheSeconds = 5.0;

        public override void OnGUI(Rect position, SerializedProperty property, GUIContent label)
        {
            if (property.propertyType != SerializedPropertyType.String)
            {
                EditorGUI.PropertyField(position, property, label);
                return;
            }

            var attr = (VoiceStyleDropdownAttribute)attribute;
            var dir = ResolveDirectory(attr, property);
            var styles = GetStyles(dir);
            var current = property.stringValue ?? string.Empty;

            var options = new List<string>(styles.Length + 1);
            if (!string.IsNullOrEmpty(current) && Array.IndexOf(styles, current) < 0)
                options.Add(current + "  (custom)");
            options.AddRange(styles);
            if (options.Count == 0)
                options.Add(string.IsNullOrEmpty(current) ? "(no styles)" : current);

            var selectedIndex = 0;
            for (var i = 0; i < options.Count; i++)
            {
                var name = options[i];
                var marker = name.IndexOf("  (custom)", StringComparison.Ordinal);
                var bare = marker >= 0 ? name.Substring(0, marker) : name;
                if (bare == current) { selectedIndex = i; break; }
            }

            const float refreshWidth = 22f;
            var popupRect = new Rect(position.x, position.y, position.width - refreshWidth - 2f, position.height);
            var refreshRect = new Rect(position.xMax - refreshWidth, position.y, refreshWidth, position.height);

            EditorGUI.BeginChangeCheck();
            var newIndex = EditorGUI.Popup(popupRect, label, selectedIndex, ToGuiContents(options));
            if (EditorGUI.EndChangeCheck())
            {
                var chosen = options[newIndex];
                var marker = chosen.IndexOf("  (custom)", StringComparison.Ordinal);
                property.stringValue = marker >= 0 ? chosen.Substring(0, marker) : chosen;
            }

            if (GUI.Button(refreshRect, new GUIContent("↻", "Rescan " + dir)))
            {
                s_CacheAt[dir] = 0;
                GetStyles(dir);
                EditorWindow.focusedWindow?.Repaint();
            }
        }

        static GUIContent[] ToGuiContents(List<string> items)
        {
            var arr = new GUIContent[items.Count];
            for (var i = 0; i < items.Count; i++) arr[i] = new GUIContent(items[i]);
            return arr;
        }

        static string ResolveDirectory(VoiceStyleDropdownAttribute attr, SerializedProperty property)
        {
            if (!string.IsNullOrWhiteSpace(attr.DirectoryField))
            {
                var sibling = property.serializedObject.FindProperty(attr.DirectoryField);
                if (sibling != null
                    && sibling.propertyType == SerializedPropertyType.String
                    && !string.IsNullOrWhiteSpace(sibling.stringValue))
                    return sibling.stringValue.Trim();
            }
            return string.IsNullOrWhiteSpace(attr.Directory) ? "Model/Supertonic/VoiceStyles" : attr.Directory.Trim();
        }

        static string[] GetStyles(string directory)
        {
            if (s_Cache.TryGetValue(directory, out var cached)
                && s_CacheAt.TryGetValue(directory, out var at)
                && EditorApplication.timeSinceStartup - at < CacheSeconds)
                return cached;

            var result = DefaultStyles;
            try
            {
                var abs = ModelPathResolver.GetModelFilePath(directory);
                if (Directory.Exists(abs))
                {
                    var files = Directory.GetFiles(abs, "*.json");
                    if (files.Length > 0)
                    {
                        var names = new List<string>(files.Length);
                        for (var i = 0; i < files.Length; i++)
                            names.Add(Path.GetFileNameWithoutExtension(files[i]));
                        names.Sort(StringComparer.Ordinal);
                        result = names.ToArray();
                    }
                }
            }
            catch
            {
                // Path resolution failed, fall through to defaults.
            }

            s_Cache[directory] = result;
            s_CacheAt[directory] = EditorApplication.timeSinceStartup;
            return result;
        }
    }
}
#endif