#define MAX_MESSAGE_LENGTH 64 //define max message length
String messageString; //define output String

void setup() {
  Serial.begin(115200); 
  pinMode(LED_BUILTIN, OUTPUT);
  Serial.println();

}

void loop() {
  parseMessage();
}

void readinSerial(){
  static unsigned int message_pos = 0; //saves the current pos of character
  while(Serial.available() > 0){ // check if there is something in the serial buffer
    static char message[MAX_MESSAGE_LENGTH]; //create a char array to store the incoming message
    char inByte = Serial.read(); //read in the next Byte from the serial buffer
    if(inByte != '\n' && (message_pos < MAX_MESSAGE_LENGTH - 1)){ //check for terminating character
      message[message_pos] = inByte; //save the byte from the serial buffer to the char array
      message_pos++; //move to next position
    }else{
      message[message_pos] = '\0'; //if the message is over
      messageString = message; //save it to the output String
      message_pos = 0; //reset the char position
    }
  }
}

void parseMessage(){
  readinSerial();
  newledOn(messageString);
  newledOff(messageString);
  newledBlink(messageString); 
  messageString ="";
}

void newledOn(String message){
  if (message == "LED_on"){
    digitalWrite(LED_BUILTIN, HIGH);
  }
}

void newledOff(String message){
  if (message == "LED_off"){
    digitalWrite(LED_BUILTIN, LOW);
  }  
}

void newledBlink(String message){
  int separatorIndex = message.indexOf(':'); // Finde die Position des Trennzeichens (:) im String
  if (separatorIndex != -1) { // Wenn das Trennzeichen gefunden wurde
    String command = message.substring(0, separatorIndex); // Extrahiere den Befehl (z.B. "LED_blink")
    int value = message.substring(separatorIndex + 1).toInt();

    // Ausgabe zur Kontrolle
    Serial.println("Command: " + command);
    Serial.print("Value: ");
    Serial.println(value);

    // Hier kannst du entsprechend auf den Befehl reagieren
    if (command == "LED_blink") {
      digitalWrite(LED_BUILTIN, HIGH);
      delay(value);
      digitalWrite(LED_BUILTIN, LOW);
      delay(value);
      digitalWrite(LED_BUILTIN, HIGH);
      delay(value);
      digitalWrite(LED_BUILTIN, LOW);
      delay(value);
      digitalWrite(LED_BUILTIN, HIGH);
      delay(value);
      digitalWrite(LED_BUILTIN, LOW);
      delay(value);
    }
  }
}