using System.IO;
using System.IO.Compression;
using System.Linq;
using Godot;

namespace KeepersCompound.TMV.UI;

public partial class ModelSelector : Control
{
	[Signal]
	public delegate void LoadModelEventHandler(string rootPath, string modelPath);

	private InstallPaths _installPaths;

	private FileDialog _FolderSelect;
	private LineEdit _FolderPath;
	private Button _BrowseButton;
	private ItemList _Models;
	private Button _LoadButton;
	private Button _CancelButton;

	private string _extractedObjectsPath = ProjectSettings.GlobalizePath($"user://objects/tmp");

	public override void _Ready()
	{
		// TODO: Load initial folderpath from config and prefil everything

		_FolderSelect = GetNode<FileDialog>("%FolderSelect");
		_FolderPath = GetNode<LineEdit>("%FolderPath");
		_BrowseButton = GetNode<Button>("%BrowseButton");
		_Models = GetNode<ItemList>("%Models");
		_LoadButton = GetNode<Button>("%LoadButton");
		_CancelButton = GetNode<Button>("%CancelButton");

		_BrowseButton.Pressed += () => _FolderSelect.Visible = true;
		_FolderSelect.DirSelected += (string dir) => { _FolderPath.Text = dir; BuildModelList(dir); };
		_FolderPath.TextSubmitted += BuildModelList;
		_Models.ItemSelected += (long _) => _LoadButton.Disabled = false;
		_LoadButton.Pressed += EmitLoadModel;
		_CancelButton.Pressed += () => Visible = false;
	}

	public override void _Input(InputEvent @event)
	{
		if (@event is InputEventKey keyEvent && keyEvent.Pressed)
		{
			if (keyEvent.Keycode == Key.Escape)
			{
				Visible = !Visible;
			}
		}
	}

	private void BuildModelList(string path)
	{
		_installPaths = new InstallPaths(path);
		ExtractObjFiles();

		_Models.Clear();
		_LoadButton.Disabled = true;

		var paths = Directory.GetFiles(_extractedObjectsPath, "*.bin", SearchOption.AllDirectories);
		foreach (var m in paths.OrderBy(s => s))
		{
			_Models.AddItem(m.TrimPrefix(_extractedObjectsPath));
		}
	}

	// TODO: Move this to a resource manager
	private void ExtractObjFiles()
	{
		var dir = new DirectoryInfo(_extractedObjectsPath);
		if (dir.Exists)
		{
			dir.Delete(true);
		}

		var zip = ZipFile.OpenRead(_installPaths.objPath);
		zip.ExtractToDirectory(_extractedObjectsPath);
	}

	private void EmitLoadModel()
	{
		var selected = _Models.GetSelectedItems();
		if (selected.IsEmpty())
		{
			return;
		}

		var path = _extractedObjectsPath + _Models.GetItemText(selected[0]);
		EmitSignal(SignalName.LoadModel, _installPaths.rootPath, path);

		Visible = false;
	}
}