#include <Adafruit_NeoPixel.h>

#define LED_PIN     11
#define BUZZER_PIN  5
#define BUTTON_PIN  3
#define LED_COUNT   16

// 初始化NeoPixel环
Adafruit_NeoPixel strip(LED_COUNT, LED_PIN, NEO_GRB + NEO_KHZ800);

// 音乐参数（《超级马里奥》主题曲片段）
int melody[] = { 660, 660, 660, 510, 660, 770, 380 };
int noteDurations[] = { 100, 100, 100, 100, 100, 100, 100 };

volatile bool buttonPressed = false;
unsigned long lastDebounceTime = 0;
const unsigned long debounceDelay = 50;

void setup() {
  strip.begin();
  strip.show(); // 初始化所有灯关闭
  pinMode(BUTTON_PIN, INPUT_PULLUP);
  attachInterrupt(digitalPinToInterrupt(BUTTON_PIN), buttonISR, FALLING);
  resetLights();
}

void loop() {
  if (buttonPressed && (millis() - lastDebounceTime) > debounceDelay) {
    buttonPressed = false;
    startAnimation();
  }
}

void buttonISR() {
  if (!buttonPressed && (millis() - lastDebounceTime) > debounceDelay) {
    buttonPressed = true;
    lastDebounceTime = millis();
  }
}

void resetLights() {
  for (int i=0; i<LED_COUNT; i++) {
    strip.setPixelColor(i, strip.Color(255, 255, 0)); // 黄色
  }
  strip.show();
}

void startAnimation() {
  // 关闭所有灯光（逐个熄灭）
  for (int i=0; i<LED_COUNT; i++) {
    strip.setPixelColor(i, 0);
    strip.show();
    playMusicSegment(i);
    delay(125); // 2秒完成16个灯（2000/16=125ms）
  }
  
  noTone(BUZZER_PIN);
  delay(1000);
  resetLights();
}

void playMusicSegment(int noteIndex) {
  if (noteIndex < 7) { // 只播放前7个音符
    int duration = 1000 / noteDurations[noteIndex];
    tone(BUZZER_PIN, melody[noteIndex], duration);
    delay(duration * 1.3);
    noTone(BUZZER_PIN);
  }
}