#include "pitches.h"
#include <Wire.h>
#include <LiquidCrystal_I2C.h>

#define SPEAKER_PIN 8

LiquidCrystal_I2C lcd(0x27, 20, 4); 

const uint8_t buttonPins[] = { 12, 11, 10, 9, 7, 6, 5, 4 };
const int buttonTones[] = {
  NOTE_C4, NOTE_D4, NOTE_E4, NOTE_F4,
  NOTE_G4, NOTE_A4, NOTE_B4, NOTE_C5
};
const int numTones = sizeof(buttonPins) / sizeof(buttonPins[0]);

const int maxNotes = 20; 
int recordedNotes[maxNotes];
int recordedCount = 0;

void setup() {
  lcd.begin(20, 4); 
  for (uint8_t i = 0; i < numTones; i++) {
    pinMode(buttonPins[i], INPUT_PULLUP);
  }
  pinMode(SPEAKER_PIN, OUTPUT);
  displayRecordedNotes();
}

void loop() {
  int pitch = 0;
  for (uint8_t i = 0; i < numTones; i++) {
    if (digitalRead(buttonPins[i]) == LOW) {
      pitch = buttonTones[i];
      recordNote(pitch);
      displayRecordedNotes();
    }
  }
  if (pitch) {
    tone(SPEAKER_PIN, pitch);
    delay(250); 
    noTone(SPEAKER_PIN);
  }
}

void recordNote(int pitch) {
  if (recordedCount < maxNotes) {
    recordedNotes[recordedCount++] = pitch;
  } else {
    for (int i = 0; i < maxNotes - 1; i++) {
      recordedNotes[i] = recordedNotes[i + 1];
    }
    recordedNotes[maxNotes - 1] = pitch;
  }
}

void displayRecordedNotes() {
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Music:");

  for (int i = 0; i < recordedCount; i++) {
    lcd.print(" ");


    switch (recordedNotes[i]) {
      case NOTE_C4: lcd.print("Do"); break; 
      case NOTE_D4: lcd.print("Re"); break;
      case NOTE_E4: lcd.print("Mi"); break;
      case NOTE_F4: lcd.print("Fa"); break;
      case NOTE_G4: lcd.print("So"); break;
      case NOTE_A4: lcd.print("La"); break;
      case NOTE_B4: lcd.print("Ti"); break;
      case NOTE_C5: lcd.print("Do"); break;
      default: lcd.print("Unknown");
    }
  }
}

void clearLCD() {
  lcd.clear();
}