using System;
using System.Threading;

namespace Sandbox;

public class EditorSystemPublic : EditorSystem
{
	public override Scene Scene => SceneEditorSession.Active?.Scene;

	/// <summary>
	/// Run a process on multiple items, show progress bar
	/// </summary>
	public override async Task ForEachAsync<T>( IEnumerable<T> list, string title, Func<T, CancellationToken, Task> worker, CancellationToken cancel = default, bool modal = false )
	{
		int count = list.Count();
		if ( count <= 0 ) return;

		using ( var p = ProgressSection( modal ) )
		{
			using var linkedCt = CancellationTokenSource.CreateLinkedTokenSource( cancel, p.GetCancel() );

			p.Title = title;
			p.TotalCount = count;
			await Task.Delay( 1 );

			int current = 0;
			FastTimer ft = FastTimer.StartNew();
			foreach ( var item in list )
			{
				current++;
				await worker( item, linkedCt.Token );

				p.Current = current;
				p.Subtitle = $"Processing {current} / {count}";

				if ( ft.ElapsedMilliSeconds > 50 )
				{
					await Task.Delay( 1, linkedCt.Token );
					ft = FastTimer.StartNew();
				}

				if ( linkedCt.IsCancellationRequested ) return;
			}
		}
	}


	/// <summary>
	/// Start a progress section
	/// </summary>
	public override IProgressSection ProgressSection( bool modal = false )
	{
		if ( modal ) return new PopupProgress();
		return new PopupToast();
	}

	public override CameraComponent Camera => SceneEditorSession.Active?.Scene.GetAll<CameraComponent>().Where( x => x.IsSceneEditorCamera ).FirstOrDefault();
}