// LAB 1; ADRIANA SARAH ; 52224123439 L01-B01

int speaker = 8;
int redLight = 2;
int yellowLight = 3;
int greenLight = 4;
int redSwitch = 13;
int yellowSwitch = 12;
int greenSwitch = 11;

int redSwitchState = 0;
int yellowSwitchState = 0;
int greenSwitchState = 0;

void setup() {
  pinMode(speaker, OUTPUT);
  pinMode(redLight, OUTPUT);
  pinMode(yellowLight, OUTPUT);
  pinMode(greenLight, OUTPUT);
  pinMode(redSwitch, INPUT);
  pinMode(yellowSwitch, INPUT);
  pinMode(greenSwitch, INPUT);
  Serial.begin(9600); // initialize serial communication for debugging
  Serial.println("Setup is complete, ready to execute patterns.");
}

void loop() {
  
  if (digitalRead(redSwitch) == 1) {
    delay(50); // debounce delay
    if (digitalRead(redSwitch) == 1, HIGH) { // to confirm button is still pressed
      Serial.println("Red button is pressed.");
      pattern1();
    }
  }

  if (digitalRead(yellowSwitch) == 1) {
    delay(50); // debounce delay
    if (digitalRead(yellowSwitch) == 1, HIGH) { // to confirm button is still pressed
      Serial.println("Yellow button is pressed.");
      pattern2();
    }
  }

  if (digitalRead(greenSwitch) == 1, HIGH) {
    delay(50); // debounce delay
    if (digitalRead(greenSwitch) == HIGH) { // to confirm button is still pressed
      Serial.println("Green button is pressed.");
      pattern3();
    }
  }
}

// pattern 1 ; all LEDS + buzzer
void pattern1() {
  Serial.println("Pattern 1 is executing.");
  digitalWrite(redLight, HIGH);
  delay(200);
  digitalWrite(redLight, LOW);
  delay(200);
  digitalWrite(yellowLight, HIGH);
  delay(200);
  digitalWrite(yellowLight, LOW);
  delay(200);
  digitalWrite(greenLight, HIGH);
  delay(200);
  digitalWrite(greenLight, LOW);
  delay(200);
  tone(speaker, 1000, 100); // play 1000 Hz for 100 ms
  delay(200); // wait to let the tone finish playing
  Serial.println("Pattern 1 is done.");
}

// pattern 2 ; all LEDS in reverse + buzzer
void pattern2() {
  Serial.println("Pattern 2 is executing.");
  digitalWrite(redLight, HIGH);
  delay(200);
  digitalWrite(redLight, LOW);
  delay(200);
  digitalWrite(yellowLight, HIGH);
  delay(200);
  digitalWrite(yellowLight, LOW);
  delay(200);
  digitalWrite(greenLight, HIGH);
  delay(200);
  digitalWrite(greenLight, LOW);

  tone(speaker, 1000, 100); // play 1000 Hz for 100 ms
  delay(200);

  digitalWrite(greenLight, HIGH);
  delay(200);
  digitalWrite(greenLight, LOW);
  digitalWrite(yellowLight, HIGH);
  delay(200);
  digitalWrite(yellowLight, LOW);
  delay(200);
  digitalWrite(redLight, HIGH);
  delay(200);
  digitalWrite(redLight, LOW);
  delay(200);
 
Serial.println("Pattern 2 is done.");
}

// pattern 3 ; two LEDs at once + remainder LED and buzzer
void pattern3() {
  Serial.println("Pattern 3 is executing.");
  digitalWrite(redLight, HIGH);
  digitalWrite(yellowLight, HIGH);
  delay(200);
  digitalWrite(redLight, LOW);
  digitalWrite(yellowLight, LOW);
  delay(200);
  tone(speaker, 1000, 100); // play 1000 Hz for 100 ms
  digitalWrite(greenLight, HIGH);
  delay(200);
  digitalWrite(greenLight, LOW);
  Serial.println("Pattern 3 is done.");
}