using System.Text;

namespace qdr.app.tools.qfu.gui
{
    internal class RTFConsoleTextWriter : TextWriter
    {
        public override Encoding Encoding => Encoding.UTF8;
        private RichTextBox _richTextBox;

        public RTFConsoleTextWriter(RichTextBox outputRtfBox)
        {
            _richTextBox = outputRtfBox ?? throw new ArgumentNullException(nameof(outputRtfBox));
        }

        public override void WriteLine(string? value)
        {
            if (value == null) return;
            Write(value);
        }

        public override void Write(string? value)
        {
            if (value == null) return;
            // Convert the string to RTF format
            string rtfValue = ConvertToRtf(value);
            // Write the RTF formatted string to the console
            if (_richTextBox.InvokeRequired)
            {
                _richTextBox.Invoke(new Action(() => AppendRtfText(rtfValue)));
            }
            else
            {
                AppendRtfText(rtfValue);
            }
        }

        private void AppendRtfText(string rtfValue)
        {
            _richTextBox.AppendText(rtfValue);
           _richTextBox.SelectionStart = _richTextBox.TextLength;
           _richTextBox.ScrollToCaret();
        }

        private string ConvertToRtf(string value)
        {
            return value + "\r";
        }
    }
}