using Sandbox.UI;
using Sandbox;
using System.Collections.Generic;
using System.Linq;
using Editor;

namespace PanelRenderTarget;

[CustomEditor( typeof( PanelTypeReference ) )]
public class PanelTypeReferenceEditor : ControlObjectWidget
{
	public override bool SupportsMultiEdit => false;

	private readonly ComboBox _typeSelector;
	private readonly List<TypeDescription> _panelTypes;

	public PanelTypeReferenceEditor( SerializedProperty property ) : base( property, false )
	{
		Layout = Layout.Column();
		Layout.Spacing = 4;

		_panelTypes = EditorTypeLibrary.GetTypes<ScreenPanel>()
			.Where( x => !x.IsAbstract && x.TargetType != null )
			.OrderBy( x => x.Title ?? x.Name )
			.ToList();

		var row = Layout.AddRow();
		row.Add( new Editor.Label( "Panel Type" ) { MinimumWidth = 120 } );
		_typeSelector = row.Add( new ComboBox( this ), 1 );

		_typeSelector.AddItem( "(Aucun)" );

		for ( int i = 0; i < _panelTypes.Count; i++ )
		{
			_typeSelector.AddItem( _panelTypes[i].Title ?? _panelTypes[i].Name );
		}

		var current = SerializedProperty.GetValue<PanelTypeReference>();
		var currentTypeName = current?.TypeName;

		if ( string.IsNullOrWhiteSpace( currentTypeName ) )
		{
			_typeSelector.CurrentIndex = 0;
		}
		else
		{
			var idx = _panelTypes.FindIndex( x =>
				x.TargetType?.FullName == currentTypeName ||
				x.ClassName == currentTypeName ||
				x.Name == currentTypeName );

			_typeSelector.CurrentIndex = idx >= 0 ? idx + 1 : 0;
		}

		_typeSelector.ItemChanged += OnTypeChanged;
	}

	private void OnTypeChanged()
	{
		if ( _typeSelector.CurrentIndex <= 0 )
		{
			SerializedProperty.SetValue( new PanelTypeReference() );
			return;
		}

		var selected = _panelTypes[_typeSelector.CurrentIndex - 1];

		SerializedProperty.SetValue( new PanelTypeReference
		{
			TypeName = selected.TargetType.FullName
		} );
	}
}