// vim:filetype=arduino
#include <Bounce.h>

const unsigned int LED_BIT0 = 10;
const unsigned int LED_BIT1 = 11;
const unsigned int LED_BIT2 = 12;
const unsigned int START_BUTTON_PIN = 5;
const unsigned int GUESS_BUTTON_PIN = 7;
const unsigned int BAUD_RATE = 9600;
const unsigned int DEBOUNCE_DELAY = 20;
const unsigned int HOORAY_FLASHES = 10;
const unsigned int HOORAY_FLASH_BATCHES = 3;
const unsigned int HOORAY_FLASH_BATCH_PAUSE = 200;
const unsigned int HOORAY_FLASH_DURATION = 50;
Bounce startButton = Bounce();
Bounce guessButton = Bounce();
int guess = 0;

void outputResult(const long result) {
    digitalWrite(LED_BIT0, result & B001);
    digitalWrite(LED_BIT1, result & B010);
    digitalWrite(LED_BIT2, result & B100);
}

void hooray() {
    for (unsigned int i = 0; i < HOORAY_FLASH_BATCHES; i++) {
        for (unsigned int i = 0; i < HOORAY_FLASHES; i++) {
            outputResult(7);
            delay(HOORAY_FLASH_DURATION);
            outputResult(0);
            delay(HOORAY_FLASH_DURATION);
        }
        delay(HOORAY_FLASH_BATCH_PAUSE);
    }
}

void handleGuessButton() {
    if (!guessButton.update()) {
        return;
    }

    if (guessButton.read() == HIGH) {
        guess = (guess % 6) + 1;
        outputResult(guess);
        Serial.print("Guess: ");
        Serial.println(guess);
    }
}

void handleStartButton() {
    if (!startButton.update()) {
        return;
    }

    if (startButton.read() == HIGH) {
        const int result = random(1, 7);
        outputResult(result);
        Serial.print("Result: ");
        Serial.println(result);

        if (guess > 0) {
            if (result == guess) {
                Serial.println("You win!");
                hooray();
            } else {
                Serial.println("You lose!");
            }
        }

        delay(2000);
        guess = 0;
    }
}

void setup() {
    pinMode(LED_BIT0, OUTPUT);
    pinMode(LED_BIT1, OUTPUT);
    pinMode(LED_BIT2, OUTPUT);
    pinMode(START_BUTTON_PIN, INPUT);
    pinMode(GUESS_BUTTON_PIN, INPUT);
    randomSeed(analogRead(A0));
    Serial.begin(BAUD_RATE);

    startButton.attach(START_BUTTON_PIN);
    startButton.interval(DEBOUNCE_DELAY);

    guessButton.attach(GUESS_BUTTON_PIN);
    guessButton.interval(DEBOUNCE_DELAY);
}

void loop() {
    handleGuessButton();
    handleStartButton();
}