// name: Adrian Jacobs, student ID: 300356808

// including servo library
#include <Servo.h>
// creating variable for servo motor
Servo servoMotor; 

// temporary variable that will be given the millis value
unsigned long tempTime = 0;

// defining a function that will blink an LED for 500 milliseconds
void blinkLED(int pinNumber) {
  // giving the millis value to tempTime
  tempTime = millis();
  // keeing the LED on until millis become greater than tempTime by at least 500 milliseconds
  while (millis() < tempTime + 500) {
    digitalWrite(pinNumber, LOW);
  }
  // turning the LED off
  digitalWrite(pinNumber, HIGH);
}

// defining a new delay function using the millis function
void millisDelay(int delayLength) {
  // giving the millis value to tempTime
  tempTime = millis();
  // waiting until millis becomes greater than tempTime by at least 500 milliseconds
  while (millis() < tempTime + delayLength) {
  }  
}

void setup() {
  // pin setup for the 4 pushbuttons
  pinMode(2, INPUT); // button A (blue button)
  pinMode(7, INPUT); // button D (red button)
  pinMode(8, INPUT); // button C (yellow button)
  pinMode(12, INPUT); // button B (green button)
  
  // pin setup for the 4 LEDs
  pinMode(5, OUTPUT); // amber LED
  pinMode(6, OUTPUT); // blue LED
  pinMode(9, OUTPUT); // red LED
  pinMode(10, OUTPUT); // green LED

  // setup for the serial monitor
  Serial.begin(9600);
  
  // pin setup for the servo motor
  servoMotor.attach (11);
}

void loop() {
  // begin by turning all of the LEDs off
  digitalWrite(5, HIGH);
  digitalWrite(6, HIGH);
  digitalWrite(9, HIGH);
  digitalWrite(10, HIGH);

  // default LED bahavior
  // for (int i = 0; i < 5; i++) {
  //   blinkLED(5);
  //   millisDelay(250);
  //   blinkLED(10);
  //   millisDelay(250);
  // }
  // for (int i = 0; i < 5; i++) {
  //   blinkLED(6);
  //   millisDelay(250);
  //   blinkLED(9);
  //   millisDelay(250);
  // }

  // detecting if button is A is being pressed
  if (digitalRead(2) == HIGH) {
    // couldn't figure out how to get an interrupt to work  
  }

  // detecting if button B is being pressed
  if (digitalRead(12) == HIGH) {
    // moving the servo motor to 10 degrees
    servoMotor.write(10);
    // waiting 500 milliseconds
    millisDelay(500);
    // increasing the angle of the servo motor by 1 degree every 8 milliseconds
    for (int i = 10; i < 121; i++) {
      servoMotor.write(i);
      millisDelay(8);
    }
  }

  // detecting if button C is being pressed
  if (digitalRead(8) == HIGH) {
    // blinking the green LED
    blinkLED(10);
    // waiting 250 milliseconds
    millisDelay(250);
    blinkLED(10);
    millisDelay(250);
    // blinking the red LED
    blinkLED(9);
    millisDelay(250);
    blinkLED(9);
    millisDelay(250);
    // blinking the blue LED
    blinkLED(6);
    millisDelay(250);
    blinkLED(6);
    millisDelay(250);
    // blinking the amber LED
    blinkLED(5);
    millisDelay(250);
    blinkLED(5);
    millisDelay(250);
    blinkLED(5);
    millisDelay(250);
    blinkLED(5);
    millisDelay(250);
    blinkLED(6);
    millisDelay(250);
    blinkLED(6);
    millisDelay(250);
    blinkLED(9);
    millisDelay(250);
    blinkLED(9);
    millisDelay(250);
    blinkLED(10);
    millisDelay(250);
    blinkLED(10);
  }

  // detecting if button D is being pressed
  if (digitalRead(7) == HIGH) {
    // randomly generating either 0, 1, or 2
    int state = rand() % 3;
    // switch case with the 3 random states
    switch(state) {
      case 0:
      // moving the servo motor to 30 degrees
      servoMotor.write(30);
      // blinking the green LED twice
      blinkLED(10);
      millisDelay(250);
      blinkLED(10);
      millisDelay(250);
      break;
      case 1:
      // moving the servo motor to 90 degrees
      servoMotor.write(90);
      // blinking LEDs in the following pattern: red, blue, red, blue
      for (int i = 0; i < 3; i++) {
        blinkLED(9);
        millisDelay(250);
        blinkLED(6);
        millisDelay(250);
      }
      break;
      case 2:
      // moving the servo motor to 150 degrees
      servoMotor.write(150);
      // blinking the amber LED 4 times
      for (int i = 0; i < 4; i++) {
        blinkLED(5);
        millisDelay(250);
      }
      break;
    }
  }
}