// Lab 3 Pass & Pass Plus
String imvalue;

const int buzzerpin = 5;
int tonestate = 0;
const int ledpinOne = 8;
const int ledpinTwo = 7;
const int ledpinThree = 6;

int ledOneState = LOW;

int ledTwoState = LOW;  // ledState used to set the LED
unsigned long previousMillisTwo = 0;  // will store last time LED was updated
int intervalTwo = 500;

int ledThreeState = 0;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);

  pinMode(buzzerpin, OUTPUT);
  pinMode(ledpinOne, OUTPUT);
  pinMode(ledpinTwo, OUTPUT);
  pinMode(ledpinThree, OUTPUT);
}

void loop() {
  displaymenu(); // Main Display Menu text

  while (Serial.available() == 0)
  {
    // LOOPING WHILE WAITING FOR VALUE

    // Blinking LED
    unsigned long currentMillisTwo = millis();

    if (currentMillisTwo - previousMillisTwo >= intervalTwo) {
      // save the last time you blinked the LED
      previousMillisTwo = currentMillisTwo;

      // if the LED is off turn it on and vice-versa:
      if (ledTwoState == LOW) {
        ledTwoState = HIGH;
      }
      else {
        ledTwoState = LOW;
      }
      // set the LED with the ledState of the variable:
      digitalWrite(ledpinTwo, ledTwoState);
    }
  }

  imvalue = Serial.readString(); // Read string in from Serial line imput
  imvalue.trim(); // Remove whitespace

  // OPTION 1 SELECTED
  if (imvalue == "1") {
    Serial.println("buzzer has been toggled");
    if (ledOneState == HIGH) {
      ledOneState = LOW;
    }
    else {
      ledOneState = HIGH;
    }
    if (tonestate == 0) {
      tonestate = 1000;
    }
    else {
      tonestate = 0;
    }
  }

  // OPTION 2 SELECTED
  else if (imvalue == "2") {
    Serial.println("led 2 blinking has been incremented");
    intervalTwo = intervalTwo/2;
  }

  // OPTION 3 SELECTED
  else if (imvalue == "3") {
    Serial.println("led 2 blinking has been decremented");
    intervalTwo = intervalTwo*2;
  }

  // OPTION 4 SELECTED
  else if (imvalue == "4") {
    ledThreeState += 20;
    if (ledThreeState > 240){
      Serial.println("Brightness reset");
      ledThreeState = 0;
    }
    else {
      Serial.println("led 3 brightness increased");
    }
  }

  // IF ERROR
  else {
    Serial.println("Input was unsuccesful");
  }
  tone(buzzerpin, tonestate);
  digitalWrite(ledpinOne, ledOneState); // Disp led 1
  analogWrite(ledpinThree, ledThreeState);
  //}
}

void displaymenu() {
  Serial.println ("--------------- Menu ---------------");
  Serial.println("- Toggle buzzer : Press 1");
  Serial.println("- Led 2 increse speed : Press 2");
  Serial.println("- Led 2 decrese speed : Press 3");
  Serial.println("- Toggle brightness led 3 : Press 4");
}