using Sandbox.UI;

namespace BlockParty;

public sealed class EditorTextEntry : TextEntry
{
	[Parameter] public Action<string> OnCommit { get; set; }

	private bool _receivedNativeText;

	protected override void OnBlur( PanelEvent e )
	{
		base.OnBlur( e );
		OnCommit?.Invoke( Text );
	}

	public override void OnButtonEvent( ButtonEvent e )
	{
		if ( e.Pressed ) _receivedNativeText = false;
		base.OnButtonEvent( e );
	}

	public override void OnKeyTyped( char character )
	{
		_receivedNativeText = true;
		base.OnKeyTyped( character );
	}

	public override void OnButtonTyped( ButtonEvent e )
	{
		if ( e.HasShift && e.Button is "left" or "right" )
		{
			Label.MoveCaretPos( e.Button == "left" ? -1 : 1, true );
			e.StopPropagation = true;
			return;
		}

		base.OnButtonTyped( e );
		if ( !_receivedNativeText && !e.HasCtrl && !e.HasAlt && TryGetCharacter( e, out char character ) )
			base.OnKeyTyped( character );
	}

	private static bool TryGetCharacter( ButtonEvent e, out char character )
	{
		character = default;
		if ( e.Button.Length == 1 )
		{
			char raw = e.Button[0];
			if ( raw is >= 'a' and <= 'z' )
			{
				character = e.HasShift ? char.ToUpperInvariant( raw ) : raw;
				return true;
			}
			if ( raw is >= '0' and <= '9' )
			{
				character = e.HasShift ? ")!@#$%^&*("[raw - '0'] : raw;
				return true;
			}
		}

		character = e.Button switch
		{
			"space" => ' ',
			"comma" => e.HasShift ? '<' : ',',
			"period" => e.HasShift ? '>' : '.',
			"slash" => e.HasShift ? '?' : '/',
			"backslash" => e.HasShift ? '|' : '\\',
			"semicolon" => e.HasShift ? ':' : ';',
			"apostrophe" => e.HasShift ? '"' : '\'',
			"minus" => e.HasShift ? '_' : '-',
			"equal" => e.HasShift ? '+' : '=',
			"lbracket" => e.HasShift ? '{' : '[',
			"rbracket" => e.HasShift ? '}' : ']',
			"backquote" => e.HasShift ? '~' : '`',
			_ => default,
		};
		return character != default;
	}
}