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

namespace Stary.Evo.StoryEditor.Editor
{
    public class GraphExportWindow : EditorWindow
    {
        private string[] _options = Array.Empty<string>();
        private Dictionary<string, string> _paths = new();
        
        private int _selectedIndex;
        private int _selectedStoryIndex;
        private ScriptGraph _selectedStory;
        private int _selectedAssemblyIndex;
        private int _selectedLoaderIndex;
        
        [MenuItem("Evo/剧本编辑器/打开剧本")]
        private static void Open()
        {
            // 打开一个浮动窗口
            GetWindow<GraphExportWindow>( "剧本配置" ) ;
        }
        
        private void OnEnable()
        {
            minSize = maxSize = new Vector2(300, 400);
            
            // 记录Package地址并返回选项
            var packages = GraphEditorTools.GetPackages();
            _paths.Clear();
            packages.ForEach(path => _paths.Add(Path.GetFileName(path), path));
            _options = _paths.Keys.ToArray();
        }

        private void OnGUI()
        {
            GUILayout.Space(15);
            EditorGUILayout.BeginHorizontal();
            GUILayout.Space(10); 
            EditorGUILayout.BeginVertical();
            
            // Package选项
            _selectedIndex = GraphEditorTools.Popup("请选择剧本所在的Package：", _selectedIndex, _options);
            
            GUILayout.Space(15);
            
            // 显示已有剧本
            try
            {
                string[] storys;
                var packageID = _options[_selectedIndex];
                var graphDir = Path.Combine(Application.dataPath, "StoryEditor", "Graphs",
                    $"{(string.IsNullOrEmpty(packageID) ? "default" : packageID)}");
                if (!Directory.Exists(graphDir))
                {
                    storys = Array.Empty<string>();
                }
                else
                {
                    // 选择剧本
                    var guids = AssetDatabase.FindAssets($"t:{nameof(ScriptGraph)}");
                    var allAssets = guids.Select(AssetDatabase.GUIDToAssetPath)
                        .Select(AssetDatabase.LoadAssetAtPath<ScriptGraph>)
                        .ToArray();
                    storys = allAssets.Select(asset => asset.name).ToArray();
                    _selectedStoryIndex = GraphEditorTools.Popup("请选择剧本：", _selectedStoryIndex, storys);
                    _selectedStory = allAssets[_selectedStoryIndex];
                    GUILayout.Space(15);
                    
                    // 打开剧本按钮
                    if (GUILayout.Button("打开剧本"))
                    {
                        var win = GetWindow<NodeEditorWindow> (false, _selectedStory.name);
                        win.graph = _selectedStory;
                    }
                    GUILayout.Space(15);
                    
                    // 选择程序集
                    var assemblyNames = GraphEditorTools.GetAllAssemblyNames().ToArray();
                    _selectedAssemblyIndex = GraphEditorTools.Popup("请选择加载器所在的程序集：", _selectedAssemblyIndex, assemblyNames);
                    _selectedStory.assembly = assemblyNames.Length > 0 ? assemblyNames[_selectedAssemblyIndex] : null; 
                    GUILayout.Space(15);
                    
                    // 选择加载器
                    var loaders = GraphEditorTools.IResourceTypes(_selectedStory.assembly).ToArray();
                    _selectedLoaderIndex = GraphEditorTools.Popup("请选择加载器：", _selectedLoaderIndex, loaders);
                    _selectedStory.loaderType = loaders.Length > 0 ? loaders[_selectedLoaderIndex] : null;
                    GUILayout.Space(15);
                    
                    // 导出剧本按钮
                    if (GUILayout.Button("导出剧本"))
                    {
                        _selectedStory.Export();
                    }
                }
            }
            catch (Exception e)
            {
                Debug.LogException(e);
            }
            
            EditorGUILayout.EndVertical();
            GUILayout.Space(10); 
            EditorGUILayout.EndHorizontal();
        }
    }
}