#include <LiquidCrystal.h>

LiquidCrystal lcd(7, 6, 5, 4, 3, 2);
String allRead = "";

String lineOne = "";
String lineTwo = "";

int indxof = 0;

//Pins
int bgBlue = 10;
int bgGreen = 9;
int bgRed = 8;

void setup() {
  Serial.begin(9600);
  lcd.begin(16, 2);

  pinMode(bgBlue, OUTPUT);
  pinMode(bgGreen, OUTPUT);
  pinMode(bgRed, OUTPUT);

  digitalWrite(bgBlue, HIGH);
  digitalWrite(bgGreen, HIGH);
  digitalWrite(bgRed, HIGH);
}

void loop() {
    if(Serial.available() > 0) {
      delay(100);
      allRead = "";

      while(Serial.available() > 0) {
        allRead += (char) Serial.read();
      }

      if(allRead.startsWith("[PING]")) {
        Serial.println("[PONG]");
      }

      if(allRead.startsWith("[D]")) { //D wie Disp, Befehl zum Anzeigen
        lcd.clear();
        allRead = allRead.substring(3, allRead.length()); //Den Befehl wegschneiden

        indxof = allRead.indexOf("[|]");

        if(indxof != -1) { //Wenn das Trennzeichen vorhanden ist
          lineOne = allRead.substring(0, indxof);
          lineTwo = allRead.substring(indxof + 3, indxof + 21);
        } else { //sonst alles in die erste Zeile klatschen
          lineOne = allRead;
          lineTwo = "";
        }

        lcd.setCursor(0, 0);
        lcd.print(lineOne);

        lcd.setCursor(0, 1);
        lcd.print(lineTwo);
      }

    if(allRead.startsWith("[BG]")) { //
      String cmd = allRead.substring(4, allRead.length());

      if(cmd == "blue on") {
       digitalWrite(bgBlue, LOW);
      }

      if(cmd == "blue off") {
       digitalWrite(bgBlue, HIGH);
      }

      if(cmd == "green on") {
       digitalWrite(bgGreen, LOW);
      }

      if(cmd == "green off") {
       digitalWrite(bgGreen, HIGH);
      }

      if(cmd == "red on") {
       digitalWrite(bgRed, LOW);
      }

      if(cmd == "red off") {
       digitalWrite(bgRed, HIGH);
      }

      if(cmd == "off") { //Alles aus
       digitalWrite(bgRed, HIGH);
       digitalWrite(bgGreen, HIGH);
       digitalWrite(bgBlue, HIGH);
      }

     }
    }
}