#include <LiquidCrystal.h>

#include "notes.h"

#define BUZZER_PIN 2

LiquidCrystal lcd (A0, A1, A2, A3, A4, A5);

int buttonPins[] = { 8, 9, 10, 11 };
int ledPins[] = { 4, 5, 6, 7 };

const int numButtons = sizeof(buttonPins) / sizeof(buttonPins[0]);
const int numLeds = sizeof(ledPins) / sizeof(ledPins[0]);

const int notes[] = { NOTE_G4, NOTE_F4, NOTE_E4, NOTE_AS3 };

const String notesName[] = { "Note: G4  ", "Note: F4  ", "Note: E4  ", "Note: AS3 " };

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

  pinMode(buttonPins[0], INPUT_PULLUP);
  pinMode(buttonPins[1], INPUT_PULLUP);
  pinMode(buttonPins[2], INPUT_PULLUP);
  pinMode(buttonPins[3], INPUT_PULLUP);


  for (int i = 0; i < numLeds; i++) {
    pinMode(ledPins[i], OUTPUT);
  }
  pinMode(BUZZER_PIN, OUTPUT);

  lcd.begin(16,2);
  lcd.print("Music!");

  tone(BUZZER_PIN, NOTE_E4);
  delay(100);
  noTone(BUZZER_PIN);
  delay(50);
  tone(BUZZER_PIN, NOTE_F4);
  delay(100);
  noTone(BUZZER_PIN);
}

void loop() {
  lcd.setCursor(0,1);

  int note = 0;
  String noteName;
  int led;

  for (int i = 0; i < numButtons; i++) {
    if (digitalRead(buttonPins[i]) == LOW) {
      note = notes[i];
      noteName = notesName[i];
      led = ledPins[i];
    }
  }

  if (note) {
    tone(BUZZER_PIN, note);
    digitalWrite(led, HIGH);
    lcd.print(noteName);
  } else {
    noTone(BUZZER_PIN);
    digitalWrite(led, LOW);
    lcd.print("Note: NULL");
  }
}