#include "pitches.h"

#define SPEAKER_PIN 8
#define CHANGE_SONG_BUTTON_PIN 13

const uint8_t buttonPins[] = { 12, 11, 10, 9, 7, 6, 5, 4 };
const int numButtons = sizeof(buttonPins) / sizeof(buttonPins[0]);

const int notes[] = { NOTE_C4, NOTE_D4, NOTE_E4, NOTE_F4, NOTE_G4, NOTE_A4, NOTE_B4, NOTE_C5 };

// Define songs as sequences of button presses
const char* songs[] = {
  "13581234682357835", // Tauba Tauba (From "Bad Newz")
  "3587325687325687",  // Apna Bana Le
  "1356124671235678",  // Tum Hi Ho
  "1357126835783567",  // Raataan Lambiyan
  "246824682357835",   // O Maahi
  "1234567834125678",  // Shree Hanuman Chalisa
  "135712683578",      // Aasa Kooda
  "123456783412",      // Shery Shery Lade
};
const int numSongs = sizeof(songs) / sizeof(songs[0]);

int currentSongIndex = 0;
bool isPlaying = false;
int songIndex = 0;
unsigned long songStartTime = 0;

void setup() {
  for (uint8_t i = 0; i < numButtons; i++) {
    pinMode(buttonPins[i], INPUT_PULLUP);
  }
  pinMode(CHANGE_SONG_BUTTON_PIN, INPUT_PULLUP);
  pinMode(SPEAKER_PIN, OUTPUT);
}

void playNoteForButton(int button) {
  if (button >= 1 && button <= 8) {
    tone(SPEAKER_PIN, notes[button - 1], 500); // Play note for 500ms
  }
}

void playSong(const char* song) {
  unsigned long currentTime = millis();
  if (currentTime - songStartTime >= 500) { // Adjust note duration if needed
    char note = song[songIndex];
    if (note >= '1' && note <= '8') {
      playNoteForButton(note - '0');
    } else {
      noTone(SPEAKER_PIN);
    }
    songIndex = (songIndex + 1) % strlen(song);
    songStartTime = currentTime;
  }
}

void loop() {
  // Check if the song change button is pressed
  if (digitalRead(CHANGE_SONG_BUTTON_PIN) == LOW) {
    delay(50); // Debounce delay
    if (digitalRead(CHANGE_SONG_BUTTON_PIN) == LOW) {
      currentSongIndex = (currentSongIndex + 1) % numSongs;
      songIndex = 0;
      songStartTime = millis();
      isPlaying = true;
      delay(300); // Debounce delay
    }
  }

  // Check if any piano button is pressed
  for (uint8_t i = 0; i < numButtons; i++) {
    if (digitalRead(buttonPins[i]) == LOW) {
      delay(50); // Debounce delay
      if (digitalRead(buttonPins[i]) == LOW) {
        playNoteForButton(i + 1);
        isPlaying = false; // Stop playing the song if a button is pressed
        delay(300); // Debounce delay
        noTone(SPEAKER_PIN); // Stop any ongoing tone
      }
    }
  }

  // Play the current song if it's active
  if (isPlaying) {
    playSong(songs[currentSongIndex]);
  } else {
    noTone(SPEAKER_PIN);
  }
}