/*
  Wire Loop Buzzer Game
  Compatible with ATtiny13 and ATtiny85
  Robert's 3-strike game with LEDs and buzzer

  Wiring:
  PB0 - Wand input (loop contact, active LOW, INPUT_PULLUP)
  PB1 - Buzzer output
  PB2 - LED1 (yellow)
  PB3 - LED2 (orange)
  PB4 - LED3 (red)
*/

#define WAND_PIN   0
#define BUZZER_PIN 1
#define LED1_PIN   2
#define LED2_PIN   3
#define LED3_PIN   4

uint8_t strikes = 0;
bool contact = false;
unsigned long lastTouch = 0;

void setup() {
  pinMode(WAND_PIN, INPUT_PULLUP);
  pinMode(BUZZER_PIN, OUTPUT);
  pinMode(LED1_PIN, OUTPUT);
  pinMode(LED2_PIN, OUTPUT);
  pinMode(LED3_PIN, OUTPUT);

  digitalWrite(LED1_PIN, LOW);
  digitalWrite(LED2_PIN, LOW);
  digitalWrite(LED3_PIN, LOW);
}

void loop() {
  bool hit = (digitalRead(WAND_PIN) == LOW);

  if (hit && !contact) {
    contact = true;
    handleStrike();
    lastTouch = millis();
  }

  // simple debounce / holdoff
  if (!hit && contact && (millis() - lastTouch > 100)) {
    contact = false;
  }
}

void handleStrike() {
  strikes++;

  switch (strikes) {
    case 1:
      buzz(150);
      flashLED(LED1_PIN, 3, 100);
      digitalWrite(LED1_PIN, HIGH);
      break;

    case 2:
      buzz(150);
      flashLED(LED2_PIN, 3, 100);
      digitalWrite(LED2_PIN, HIGH);
      break;

    case 3:
      gameOver();
      break;
  }
}

void buzz(unsigned int duration) {
  // simple software tone, works on all cores
  unsigned long t = millis();
  while (millis() - t < duration) {
    digitalWrite(BUZZER_PIN, HIGH);
    delayMicroseconds(500);
    digitalWrite(BUZZER_PIN, LOW);
    delayMicroseconds(500);
  }
}

void flashLED(uint8_t pin, uint8_t times, unsigned int delayMs) {
  for (uint8_t i = 0; i < times; i++) {
    digitalWrite(pin, HIGH);
    delay(delayMs);
    digitalWrite(pin, LOW);
    delay(delayMs);
  }
}

void gameOver() {
  for (uint8_t i = 0; i < 5; i++) {
    digitalWrite(LED3_PIN, HIGH);
    buzz(100);
    delay(150);
    digitalWrite(LED3_PIN, LOW);
    delay(150);
  }

  // long buzz + all LEDs on
  buzz(500);
  digitalWrite(LED1_PIN, HIGH);
  digitalWrite(LED2_PIN, HIGH);
  digitalWrite(LED3_PIN, HIGH);

  // stop everything until reset
  while (true);
}