using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using Godot;
using System.Linq;
using System.Threading.Tasks;
using Learn.Component;
using Learn.Parsers;
using Learn.Utils;

public partial class Main : Node
{
	[ExportGroup("文件夹操作")]
	[Export] private FileDirSelector _dirSelector;

	[ExportGroup("操作面板")]
	[Export] private Button _openDirButton;
	[Export] private Button _doParseButton;
	[Export] private Button _saveButton;
	[Export] private Button _resetButton;
	[Export] private Button _loadButton;
	
	[ExportGroup("编辑面板")]
	[Export] private NodeInfoEditPanel _nodeInfoEditPanel;
	[Export] private Button _addKeyButton;
	[Export] private Button _removeKeyButton;
	
	[ExportGroup("解析面板")]
	[Export] private InspectorPanel _inspectorPanel;
	
	[ExportGroup("主展示面板")] 
	[Export] private MainTreePanel _mainTreePanel;
	[Export] private LineEdit _columnIndexText;
	[Export] private LineEdit _columnText;
	[Export] private Button _addColumnButton;
	[Export] private Button _removeColumnButton;
	[Export] private Button _clearColumnButton;
	[Export] private Button _expandAllButton;
	[Export] private Button _foldAllButton;

	private bool _refreshPanels;

	private Configs _configs;
	
	public override void _Ready()
	{
		_nodeInfoEditPanel.OnNodeInfoEdited += _mainTreePanel.UpdateColumns;
		_addKeyButton.Pressed += _nodeInfoEditPanel.AddKeyValue;
		_removeKeyButton.Pressed += _nodeInfoEditPanel.RemoveKeyValue;

		_mainTreePanel.MultiSelected += (_, _, _) => { _refreshPanels = true; };
		_addColumnButton.Pressed += () => _mainTreePanel.AddColumn(_columnText.Text, int.TryParse(_columnIndexText.Text, out var index) ? index : -1);
		_removeColumnButton.Pressed += () => _mainTreePanel.RemoveColumn(_columnText.Text);
		_clearColumnButton.Pressed += () => _mainTreePanel.ClearColumns();
		
		_expandAllButton.Pressed += ExpandAll;
		_foldAllButton.Pressed += FoldAll;
		
		// 功能区
		_openDirButton.Pressed += ScanDir;
		_doParseButton.Pressed += DoParse;
		_saveButton.Pressed += DoSave;
		_resetButton.Pressed += DoReset;
		_loadButton.Pressed += LoadData;
		_doParseButton.Text = "开始解析";
			
		LoadData();
		
		_mainTreePanel.Scan("C:/Users/15401/Desktop/2025-up7"); // todo: 弄好后删掉
		
		FoldAll();
		_refreshPanels = true;
		
		_configs = new Configs();
		_configs.ConfigPath = "config.json";
		_configs.Load(true);
	}

	private void LoadData()
	{
		if (File.Exists(DataPath))
		{
			_mainTreePanel.LoadData(DataPath);
			GD.Print("加载成功：" + DataPath);
			_refreshPanels = true;
		}
	}

	private void ExpandAll()
	{
		SetAllCollapsed(false);
	}

	private void FoldAll()
	{
		SetAllCollapsed(true);
	}

	private void SetAllCollapsed(bool collapsed)
	{
		var root = _mainTreePanel.GetRoot();
		if (root == null) return;
		var queue = new Queue<TreeItem>();
		queue.Enqueue(root);
		while (queue.Count > 0)
		{
			var treeItem = queue.Dequeue();
			foreach (var child in treeItem.GetChildren())
			{
				if(child == null) continue;
				child.Collapsed = collapsed;
				queue.Enqueue(child);
			}
		}
	}

	public override void _Process(double delta)
	{
		if (_refreshPanels)
		{
			_refreshPanels = false;
			_nodeInfoEditPanel.SetNodes(_mainTreePanel.SelectingNodes);
			_inspectorPanel.SetNode(_mainTreePanel.SelectingNodes.FirstOrDefault());
		}
	}
	
	#region Commands
	
	
	private async void ScanDir()
	{
		var path = await _dirSelector.SelectFolderAsync();
		if (string.IsNullOrEmpty(path))
		{
			return;
		}
		_mainTreePanel.Scan(path);
		FoldAll();
		_refreshPanels = true;
	}

	private async void DoParse()
	{
		var root = _mainTreePanel.GetRoot();
		if (root == null) return;

		var originName = _doParseButton.Text;
		_doParseButton.Disabled = true;
		
		ItemParser parser = new TMDBParser(_configs);

		var stopwatch = Stopwatch.StartNew();
		var stack = new Stack<TreeItem>();
		stack.Push(root);

		while (stack.Count > 0)
		{
			_doParseButton.Text = "解析中";
			if (stopwatch.ElapsedMilliseconds > 2000)
			{
				_mainTreePanel.UpdateColumns();
				stopwatch.Restart();
			}
			var treeItem = stack.Pop();
			foreach (var child in treeItem.GetChildren())
			{
				if(child == null) continue;
				if (_mainTreePanel.Query(child, out var node))
				{
					try
					{
						if (!await parser.DoParse(node))
						{
							GD.PrintErr($"解析{child.GetText(0)}失败");
						}
					}
					catch (Exception ex)
					{
						GD.PrintErr($"解析{child.GetText(0)}出现异常:" + ex);
					}
				}
				stack.Push(child);
			}
		}

		_doParseButton.Text = originName;
		_doParseButton.Disabled = false;
		_mainTreePanel.UpdateColumns();
		GD.Print("Done");
	}

	private const string DataPath = "data.json";
	
	private void DoSave()
	{
		_mainTreePanel.SaveData(DataPath);
		GD.Print("保存成功");
	}

	private void DoReset()
	{
		_mainTreePanel.ClearData();
		_nodeInfoEditPanel.OnNodesChanged();
		GD.Print("清空成功");
	}
	
	#endregion
}