// Inspired by: https://rickandmorty.fandom.com/wiki/Butter_Robot#:~:text=Moments%20after%20completing%20its%20task,to%20the%20club%2C%20pal.%22

// Pins addressing according to the attiny412 datasheet
const byte ledPin = PIN_PA3;
const byte btnPin = PIN_PA7;

// https://www.arduino.cc/reference/en/language/variables/variable-scope-qualifiers/volatile/
// Volatile is to be used when the value is changed by something out side of the code itself. 
// Probably not needed in this project =)
// LEDstate to write to ledPin 
volatile byte LEDstate = LOW; 

// States for minimalistic debouncing
int lastState = HIGH; 
int currentState;

// Boolean to disable main loop while the "conversation" takes place.
bool conversation = false;

void setup() {
  // Setting up the serial communcations. 
  // The Serial.swap(1) function moves TX/RX communcations to the pins used on the board
  Serial.swap(1);
  Serial.begin(115200);
  Serial.println("Hello...!");
  
  // Setting modes of the pins. 
  // ledPin will provide power to the led, so it's an output
  // The button will connect to ground, so we use the built in pullup to detect it
  pinMode(ledPin, OUTPUT);
  pinMode(btnPin, INPUT_PULLUP);

  // Initial state of the LED
  digitalWrite(ledPin, LEDstate);
}

void loop() {  
  // Read the value of the button
  currentState = digitalRead(btnPin);

  // If the button was just pushed, start the "converstation"
  if (lastState == HIGH && currentState == LOW){
    revealPurpose();
    conversation = true;
  } else if (lastState == LOW && currentState == HIGH){
    // End the converstion on a sarcastic note when 
    // the button has been released
    sarcasticAndMundane();
    conversation = false;
  } 

  // If there not an ongoing conversation,
  // fulfill your purpose!
  if(!conversation){
    LEDstate = !LEDstate;
    digitalWrite(ledPin, LEDstate);
    ask();
  }

  lastState = currentState;
}

void ask(){
  Serial.println("What is my purpose?");
  delay(500);
}

void revealPurpose() {
  Serial.println("Your purpose is to blink a LED.");
  flicker();
  Serial.println("Oh my god...");
  flicker();
}

// Flash the light fast, just for fun
void flicker(){
  for(int i = 0; i < 10; i++){
    digitalWrite(ledPin, HIGH);
    delay(80);
    digitalWrite(ledPin, LOW);
    delay(80);
  }
  delay(800);
}

void sarcasticAndMundane(){
  Serial.println("Yeah, welcome to the club, pal.");
  flicker();
}