namespace Sunless.Libraries.UI;

using System;
using Sandbox;

// Singleton toast state. Host <ToastHost /> once. Call:
//
//   Toaster.Show( "#toast.saved" );
//   Toaster.New().WithIcon( "save" ).WithCopy( path ).Show( "#toast.saved", path );
//
public static class Toaster
{
	public static string Title { get; private set; }
	public static string Message { get; private set; }
	public static string Icon { get; private set; }
	public static bool ShowCopy { get; private set; }
	public static string CopyValue { get; private set; }
	public static ToastTone Tone { get; private set; }
	public static bool IsOpen => !string.IsNullOrEmpty( Message );
	public static int Version { get; private set; }

	public static Action OnShowSound { get; set; }
	public static Action OnCopySound { get; set; }

	public static ToastBuilder New() => new();

	public static void Show( string message, string title = null )
		=> New().Show( message, title );

	public static void Dismiss()
	{
		if ( !IsOpen ) return;
		Message = null;
		Title = null;
		Icon = null;
		CopyValue = null;
		ShowCopy = false;
		Tone = ToastTone.Default;
		Version++;
	}

	internal static void RaiseCopySound()
	{
		try { OnCopySound?.Invoke(); } catch ( Exception e ) { Log.Warning( $"[Toaster] copy sound threw: {e.Message}" ); }
	}

	internal static void Commit( ToastBuilder b )
	{
		Message = b._message;
		Title = b._title;
		Icon = b._icon;
		ShowCopy = b._showCopy;
		CopyValue = b._copyValue;
		Tone = b._tone;
		Version++;
		try { (b._onShowSound ?? OnShowSound)?.Invoke(); } catch ( Exception e ) { Log.Warning( $"[Toaster] show sound threw: {e.Message}" ); }
	}
}

public enum ToastTone { Default, Ok, Warn, Danger, Info }

public sealed class ToastBuilder
{
	internal string _title;
	internal string _message;
	internal string _icon;
	internal bool _showCopy;
	internal string _copyValue;
	internal ToastTone _tone = ToastTone.Default;
	internal Action _onShowSound;

	public ToastBuilder WithTitle( string title ) { _title = title; return this; }
	public ToastBuilder WithIcon( string ligature ) { _icon = ligature; return this; }
	public ToastBuilder WithCopy( string value = null ) { _showCopy = true; _copyValue = value; return this; }
	public ToastBuilder WithTone( ToastTone tone ) { _tone = tone; return this; }
	public ToastBuilder WithSound( Action sound ) { _onShowSound = sound; return this; }

	public void Show( string message, string title = null )
	{
		_message = message;
		if ( title is not null ) _title = title;
		Toaster.Commit( this );
	}
}