@page "/serialtest"
@using System.IO.Ports

<PageTitle>Serial Test</PageTitle>

<label for="portname">Port:</label>
<InputText id="portname" @bind-Value="portname"></InputText>
<label for="inputdata">Data:</label>
<InputText id="inputdata" @bind-Value="inputdata"></InputText>
<button @onclick="SendData">Send</button>
<p>
    <label>Received: @receivedText</label>
</p>



@code {
    SerialPort? port;
    string? portname = "COM5";
    string? receivedText;
    string? inputdata ="LED";

    bool status = false;

    bool Sending = false;
    bool Receiving = false;

    public async Task SendData()
    {
        if (Sending) return; // nichts senden, wenn bereits am Senden
        Sending = true;
        if (port == null && portname != null)
        {
            port = new SerialPort(portname);
            port.BaudRate = 115200; //9600
            port.DataReceived += port_DataReceived;
            //port.DataBits = 8;
            //port.StopBits = StopBits.One;
            //port.Parity = Parity.None;
            //port.Handshake = Handshake.None;
            //port.RtsEnable = true;
            port.Open();
        }
        if (port == null || !port.IsOpen) return; // Port konnte nicht initialisiert werden oder ist bereits geöffnet - dann nicht nochmal öffnen
                                                  //   port.Write($"<REZEPT:1-40,3-20,5-30,7-30,1-40,3-20,5-30,7-30,1-40,3-20,5-30,7-30:REZEPT>");
        port.Write($"<{inputdata}> ");
        status = !status;
        Sending = false;
        //    inputdata = null;

    }



    private void port_DataReceived(object sender, SerialDataReceivedEventArgs e)
    {
        if (Receiving) return;
        Receiving = true;
        SerialPort port = (SerialPort)sender;
        if (port != null)
        {
            var text = port.ReadExisting();
            Console.WriteLine(text);
            receivedText = text;
            InvokeAsync(StateHasChanged);

            // port.Close();
        }
        Receiving = false;
    }
}