/*
  Mega_Radon — Discord | Arduino | #coding-help 12/31/23 at 4:51 AM
*/
#include "pitches.h"

const int BTN_PIN = 4;
const int LED_PINS[] = {
  11, 10, 9, 8, 7, 6, 5
};
const int BUZZ_PIN = 12;

// notes in the melody:
int melody[] = {
  NOTE_C4, NOTE_G3, NOTE_G3, NOTE_A3, NOTE_G3, 0, NOTE_B3, NOTE_C4
};
// note durations: 4 = quarter note, 8 = eighth note, etc.:
int noteDurations[] = {
  4, 8, 8, 4, 4, 4, 4, 4
};
int noteLedPin[] = {
  0, 4, 4, 5, 4, -1, 6, 0
};

void playTune() {
  // iterate over the notes of the melody:
  for (int thisNote = 0; thisNote < 8; thisNote++) {
    // to calculate the note duration, take one second divided by the note type.
    //e.g. quarter note = 1000 / 4, eighth note = 1000/8, etc.
    int noteDuration = 1000 / noteDurations[thisNote];

    if (noteLedPin[thisNote] < 0) {
      // turn all the LEDs off
      for (int i = 0; i < 7; i++) {
        digitalWrite(LED_PINS[i], LOW);
      }
      tone(BUZZ_PIN, melody[thisNote], noteDuration);
    } else {
      digitalWrite(LED_PINS[noteLedPin[thisNote]], HIGH);
      tone(BUZZ_PIN, melody[thisNote], noteDuration);
      digitalWrite(LED_PINS[noteLedPin[thisNote]], LOW);
    }
    // to distinguish the notes, set a minimum time between them.
    // the note's duration + 30% seems to work well:
    int pauseBetweenNotes = noteDuration * 1.30;// was 1.3
    delay(pauseBetweenNotes);
    // stop the tone playing:
    noTone(BUZZ_PIN);
  }
}

void setup() {
  Serial.begin(115200);
  pinMode(BTN_PIN, INPUT_PULLUP);
  pinMode(BUZZ_PIN, OUTPUT);
  for (int leds = 0; leds < 7; leds++)  {
    pinMode(LED_PINS[leds], OUTPUT);
  }
  Serial.println("Ready...");
}

void loop() {
  if (digitalRead(BTN_PIN) == LOW)  {
    Serial.println("Playing tune");
    playTune();
  }
}