using Editor;

namespace ShaderGraphPlus;

internal class ProjectTemplatesListView : ListView
{
	private const string TemplatesRootFolderName = "templates";

	private List<ProjectTemplate> Templates = new List<ProjectTemplate>();

	public ProjectTemplate ChosenTemplate { get; set; }

	public ProjectTemplatesListView( Widget parent ) : base( parent )
	{
		ItemSelected = OnItemClicked;
		ItemSize = new Vector2( 0f, 48f );
		ItemSpacing = new Vector2( 4.0f, 4.0f );

		FindLocalTemplates();

		List<ProjectTemplate> orderedTemplates = Templates.OrderBy( x => x.Order ).Where( x => x.Hidden == false ).ToList();

		SetItems( orderedTemplates );
		ChosenTemplate = orderedTemplates.FirstOrDefault();

		if ( ChosenTemplate != null )
		{
			SelectItem( ChosenTemplate, false, false );
		}
		else
		{
			SGPLogger.Error( $"No templates found!!!" );
			// Do Nothing...
		}
	}

	public void OnItemClicked( object item )
	{
		if ( item is ProjectTemplate template )
		{
			ChosenTemplate = template;
		}
	}

	protected void FindLocalTemplates()
	{
		var template_path = ShaderGraphPlusFileSystem.Root.GetFullPath( $"/{TemplatesRootFolderName}" );

		if ( !Directory.Exists( template_path ) )
		{
			return;
		}

		foreach ( string template_folder in ShaderGraphPlusFileSystem.Root.FindDirectory( $"/{TemplatesRootFolderName}", "*", false ) )
		{
			string templateRoot = $"/{TemplatesRootFolderName}/{template_folder}";
			string addonPath = $"{templateRoot}/$name.{ShaderGraphPlusGlobals.AssetTypeExtension}";

			if ( ShaderGraphPlusFileSystem.Root.FileExists( addonPath ) )
			{
				ShaderGraphPlus shadergraphplusproject = Json.Deserialize<ShaderGraphPlus>( ShaderGraphPlusFileSystem.Root.ReadAllText( addonPath ) );
				Templates.Add( new ProjectTemplate( shadergraphplusproject, templateRoot ) );
			}
		}
	}

	protected override void OnPaint()
	{
		Paint.ClearPen();
		Paint.SetBrush( Theme.ControlBackground );
		Paint.DrawRect( LocalRect, 4.0f );

		base.OnPaint();
	}

	protected override void PaintItem( VirtualWidget v )
	{
		object item = v.Object;
		Rect rect = v.Rect;

		if ( item is ProjectTemplate template )
		{
			Rect r = rect;
			Color fg = Color.White;

			if ( Paint.HasSelected )
			{
				fg = Theme.Blue;
			}

			Paint.Antialiasing = true;
			Paint.ClearPen();
			Paint.SetBrush( Theme.TextButton.WithAlpha( 0.1f ) );

			if ( Paint.HasSelected )
			{
				Paint.SetBrush( Theme.Blue.WithAlpha( 0.1f ) );
			}

			Paint.DrawRect( r, 4f );

			if ( Paint.HasMouseOver )
			{
				Paint.ClearPen();
				Paint.SetBrush( Color.White.WithAlpha( 0.05f ) );
				Paint.DrawRect( r, 4f );
			}

			Paint.Antialiasing = false;

			r = r.Shrink( 8f );

			Paint.SetPen( fg.WithAlpha( 0.7f ), 0f, PenStyle.Solid );
			Paint.DrawIcon( r.Align( rect.Height - 16f, TextFlag.LeftCenter ), template.Icon, 24f );
			Paint.SetDefaultFont();

			Paint.SetPen( fg, 0f, PenStyle.Solid );

			r = r.Shrink( rect.Height - 8f, 0f );

			Rect x = Paint.DrawText( r, template.Title, TextFlag.LeftTop );

			r.Top += x.Height + 4f;

			if ( Paint.HasSelected )
			{
				Paint.SetPen( Theme.Blue.WithAlpha( 1f ), 0f, PenStyle.Solid );
			}
			else
			{
				Paint.SetPen( Theme.TextControl.WithAlpha( 0.5f ), 0f, PenStyle.Solid );
			}

			r.Right = rect.Width;
			r.Left = Paint.DrawIcon( r, "info", 12f, TextFlag.LeftTop ).Right + 4f;
			r.Left = Paint.DrawText( r, template.Description, TextFlag.LeftTop ).Right + 4f;
		}
	}
}