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

//  lcd object : setting register address 0x27
LiquidCrystal_I2C lcd(0x27, 20, 4);

byte clk = 2;
byte dt = 3;
byte sw = 4;

//  counting rotations
int counter = 0;

//  to avoid repetition
int flag = 1, prev_counter = -1;

//  buzzer pin
const byte buzzer_pin = 5;

//  button object
ezButton button(sw);

void setup() {

  Serial.begin(9600);
  attachInterrupt(digitalPinToInterrupt(clk), encoder, FALLING);
  pinMode(buzzer_pin, OUTPUT);
  //  initializing LCD
  lcd.init();  //  initialize the lcd.
  lcd.clear();  //  clears the screen and moves the cursor to the top left corner.
  lcd.backlight();  //  turn on the backlight.
  button.setDebounceTime(25);

  //  initial messages
  lcd_print(0, 0, "Music Player");
  delay(2000);
}

void loop() {

  button.loop();
  if (button.isPressed()) {
    select_mode();
  }

  choose_mode();

  //  for better working of simulator
  delay(10);
}

void encoder() {

  prev_counter = counter;

  if (digitalRead(dt)  ==  HIGH)counter++;
  else counter--;

  counter = constrain(counter, 0, 1);
  flag = 1;
}

void choose_mode() {

  if (flag  ==  1  &&  prev_counter  !=  counter) {
    if (counter  ==  0) {
      lcd.clear();
      lcd_print(0, 0, "Play Mario");
    }
    else if (counter  ==  1) {
      lcd.clear();
      lcd_print(0, 0, "Coffin Dance");
    }

    flag = 0;
  }
}

void select_mode() {
  if (counter  ==  0)mario();
  else if (counter  ==  1)coffin_dance();
}

void coffin_dance() {

  int melody[] = {
    NOTE_AS4, NOTE_AS4, NOTE_AS4, NOTE_AS4,
    NOTE_AS4, NOTE_AS4, NOTE_AS4, NOTE_AS4,
    NOTE_D5, NOTE_D5, NOTE_D5, NOTE_D5,
    NOTE_C5, NOTE_C5, NOTE_C5, NOTE_C5,
    NOTE_F5, NOTE_F5, NOTE_F5, NOTE_F5,
    NOTE_G5, NOTE_G5, NOTE_G5, NOTE_G5,
    NOTE_G5, NOTE_G5, NOTE_G5, NOTE_G5,
    NOTE_C5, NOTE_AS4, NOTE_A4, NOTE_F4,
    NOTE_G4, 0, NOTE_G4, NOTE_D5,
    NOTE_C5, 0, NOTE_AS4, 0,
    NOTE_A4, 0, NOTE_A4, NOTE_A4,
    NOTE_C5, 0, NOTE_AS4, NOTE_A4,
    NOTE_G4, 0, NOTE_G4, NOTE_AS5,
    NOTE_A5, NOTE_AS5, NOTE_A5, NOTE_AS5,
    NOTE_G4, 0, NOTE_G4, NOTE_AS5,
    NOTE_A5, NOTE_AS5, NOTE_A5, NOTE_AS5,
    NOTE_G4, 0, NOTE_G4, NOTE_D5,
    NOTE_C5, 0, NOTE_AS4, 0,
    NOTE_A4, 0, NOTE_A4, NOTE_A4,
    NOTE_C5, 0, NOTE_AS4, NOTE_A4,
    NOTE_G4, 0, NOTE_G4, NOTE_AS5,
    NOTE_A5, NOTE_AS5, NOTE_A5, NOTE_AS5,
    NOTE_G4, 0, NOTE_G4, NOTE_AS5,
    NOTE_A5, NOTE_AS5, NOTE_A5, NOTE_AS5
  };

  // note durations: 4 = quarter note, 8 = eighth note, etc.:
  int noteDurations[] = {
    4, 4, 4, 4,
    4, 4, 4, 4,
    4, 4, 4, 4,
    4, 4, 4, 4,
    4, 4, 4, 4,
    4, 4, 4, 4,
    4, 4, 4, 4,
    4, 4, 4, 4,
    4, 4, 4, 4,
    4, 4, 4, 4,
    4, 4, 4, 4,
    4, 4, 4, 4,
    4, 4, 4, 4,
    4, 4, 4, 4,
    4, 4, 4, 4,
    4, 4, 4, 4,
    4, 4, 4, 4,
    4, 4, 4, 4,
    4, 4, 4, 4,
    4, 4, 4, 4,
    4, 4, 4, 4,
    4, 4, 4, 4,
    4, 4, 4, 4,
    4, 4, 4, 4,
    4, 4, 4, 4,
    4, 4, 4, 4,
    4, 4, 4, 4,
    4, 4, 4, 4,
  };

  for (int thisNote = 0; thisNote < 112; thisNote++) {

    int noteDuration = 750 / noteDurations[thisNote];
    tone(buzzer_pin, melody[thisNote], noteDuration);

    int pauseBetweenNotes = noteDuration * 1.30;
    delay(pauseBetweenNotes);

    noTone(buzzer_pin);
  }
}

void mario() {

  tone(buzzer_pin, 660, 100);
  delay(150);
  tone(buzzer_pin, 660, 100);
  delay(300);
  tone(buzzer_pin, 660, 100);
  delay(300);
  tone(buzzer_pin, 510, 100);
  delay(100);
  tone(buzzer_pin, 660, 100);
  delay(300);
  tone(buzzer_pin, 770, 100);
  delay(550);
  tone(buzzer_pin, 380, 100);
  delay(575);

  tone(buzzer_pin, 510, 100);
  delay(450);
  tone(buzzer_pin, 380, 100);
  delay(400);
  tone(buzzer_pin, 320, 100);
  delay(500);
  tone(buzzer_pin, 440, 100);
  delay(300);
  tone(buzzer_pin, 480, 80);
  delay(330);
  tone(buzzer_pin, 450, 100);
  delay(150);
  tone(buzzer_pin, 430, 100);
  delay(300);
  tone(buzzer_pin, 380, 100);
  delay(200);
  tone(buzzer_pin, 660, 80);
  delay(200);
  tone(buzzer_pin, 760, 50);
  delay(150);
  tone(buzzer_pin, 860, 100);
  delay(300);
  tone(buzzer_pin, 700, 80);
  delay(150);
  tone(buzzer_pin, 760, 50);
  delay(350);
  tone(buzzer_pin, 660, 80);
  delay(300);
  tone(buzzer_pin, 520, 80);
  delay(150);
  tone(buzzer_pin, 580, 80);
  delay(150);
  tone(buzzer_pin, 480, 80);
  delay(500);

  tone(buzzer_pin, 510, 100);
  delay(450);
  tone(buzzer_pin, 380, 100);
  delay(400);
  tone(buzzer_pin, 320, 100);
  delay(500);
  tone(buzzer_pin, 440, 100);
  delay(300);
  tone(buzzer_pin, 480, 80);
  delay(330);
  tone(buzzer_pin, 450, 100);
  delay(150);
  tone(buzzer_pin, 430, 100);
  delay(300);
  tone(buzzer_pin, 380, 100);
  delay(200);
  tone(buzzer_pin, 660, 80);
  delay(200);
  tone(buzzer_pin, 760, 50);
  delay(150);
  tone(buzzer_pin, 860, 100);
  delay(300);
  tone(buzzer_pin, 700, 80);
  delay(150);
  tone(buzzer_pin, 760, 50);
  delay(350);
  tone(buzzer_pin, 660, 80);
  delay(300);
  tone(buzzer_pin, 520, 80);
  delay(150);
  tone(buzzer_pin, 580, 80);
  delay(150);
  tone(buzzer_pin, 480, 80);
  delay(500);

  tone(buzzer_pin, 500, 100);
  delay(300);

  tone(buzzer_pin, 760, 100);
  delay(100);
  tone(buzzer_pin, 720, 100);
  delay(150);
  tone(buzzer_pin, 680, 100);
  delay(150);
  tone(buzzer_pin, 620, 150);
  delay(300);

  tone(buzzer_pin, 650, 150);
  delay(300);
  tone(buzzer_pin, 380, 100);
  delay(150);
  tone(buzzer_pin, 430, 100);
  delay(150);

  tone(buzzer_pin, 500, 100);
  delay(300);
  tone(buzzer_pin, 430, 100);
  delay(150);
  tone(buzzer_pin, 500, 100);
  delay(100);
  tone(buzzer_pin, 570, 100);
  delay(220);

  tone(buzzer_pin, 500, 100);
  delay(300);

  tone(buzzer_pin, 760, 100);
  delay(100);
  tone(buzzer_pin, 720, 100);
  delay(150);
  tone(buzzer_pin, 680, 100);
  delay(150);
  tone(buzzer_pin, 620, 150);
  delay(300);

  tone(buzzer_pin, 650, 200);
  delay(300);

  tone(buzzer_pin, 1020, 80);
  delay(300);
  tone(buzzer_pin, 1020, 80);
  delay(150);
  tone(buzzer_pin, 1020, 80);
  delay(300);

  tone(buzzer_pin, 380, 100);
  delay(300);
  tone(buzzer_pin, 500, 100);
  delay(300);

  tone(buzzer_pin, 760, 100);
  delay(100);
  tone(buzzer_pin, 720, 100);
  delay(150);
  tone(buzzer_pin, 680, 100);
  delay(150);
  tone(buzzer_pin, 620, 150);
  delay(300);

  tone(buzzer_pin, 650, 150);
  delay(300);
  tone(buzzer_pin, 380, 100);
  delay(150);
  tone(buzzer_pin, 430, 100);
  delay(150);

  tone(buzzer_pin, 500, 100);
  delay(300);
  tone(buzzer_pin, 430, 100);
  delay(150);
  tone(buzzer_pin, 500, 100);
  delay(100);
  tone(buzzer_pin, 570, 100);
  delay(420);

  tone(buzzer_pin, 585, 100);
  delay(450);

  tone(buzzer_pin, 550, 100);
  delay(420);

  tone(buzzer_pin, 500, 100);
  delay(360);

  tone(buzzer_pin, 380, 100);
  delay(300);
  tone(buzzer_pin, 500, 100);
  delay(300);
  tone(buzzer_pin, 500, 100);
  delay(150);
  tone(buzzer_pin, 500, 100);
  delay(300);

  tone(buzzer_pin, 500, 100);
  delay(300);

  tone(buzzer_pin, 760, 100);
  delay(100);
  tone(buzzer_pin, 720, 100);
  delay(150);
  tone(buzzer_pin, 680, 100);
  delay(150);
  tone(buzzer_pin, 620, 150);
  delay(300);

  tone(buzzer_pin, 650, 150);
  delay(300);
  tone(buzzer_pin, 380, 100);
  delay(150);
  tone(buzzer_pin, 430, 100);
  delay(150);

  tone(buzzer_pin, 500, 100);
  delay(300);
  tone(buzzer_pin, 430, 100);
  delay(150);
  tone(buzzer_pin, 500, 100);
  delay(100);
  tone(buzzer_pin, 570, 100);
  delay(220);

  tone(buzzer_pin, 500, 100);
  delay(300);

  tone(buzzer_pin, 760, 100);
  delay(100);
  tone(buzzer_pin, 720, 100);
  delay(150);
  tone(buzzer_pin, 680, 100);
  delay(150);
  tone(buzzer_pin, 620, 150);
  delay(300);

  tone(buzzer_pin, 650, 200);
  delay(300);

  tone(buzzer_pin, 1020, 80);
  delay(300);
  tone(buzzer_pin, 1020, 80);
  delay(150);
  tone(buzzer_pin, 1020, 80);
  delay(300);

  tone(buzzer_pin, 380, 100);
  delay(300);
  tone(buzzer_pin, 500, 100);
  delay(300);

  tone(buzzer_pin, 760, 100);
  delay(100);
  tone(buzzer_pin, 720, 100);
  delay(150);
  tone(buzzer_pin, 680, 100);
  delay(150);
  tone(buzzer_pin, 620, 150);
  delay(300);

  tone(buzzer_pin, 650, 150);
  delay(300);
  tone(buzzer_pin, 380, 100);
  delay(150);
  tone(buzzer_pin, 430, 100);
  delay(150);

  tone(buzzer_pin, 500, 100);
  delay(300);
  tone(buzzer_pin, 430, 100);
  delay(150);
  tone(buzzer_pin, 500, 100);
  delay(100);
  tone(buzzer_pin, 570, 100);
  delay(420);

  tone(buzzer_pin, 585, 100);
  delay(450);

  tone(buzzer_pin, 550, 100);
  delay(420);

  tone(buzzer_pin, 500, 100);
  delay(360);

  tone(buzzer_pin, 380, 100);
  delay(300);
  tone(buzzer_pin, 500, 100);
  delay(300);
  tone(buzzer_pin, 500, 100);
  delay(150);
  tone(buzzer_pin, 500, 100);
  delay(300);

  tone(buzzer_pin, 500, 60);
  delay(150);
  tone(buzzer_pin, 500, 80);
  delay(300);
  tone(buzzer_pin, 500, 60);
  delay(350);
  tone(buzzer_pin, 500, 80);
  delay(150);
  tone(buzzer_pin, 580, 80);
  delay(350);
  tone(buzzer_pin, 660, 80);
  delay(150);
  tone(buzzer_pin, 500, 80);
  delay(300);
  tone(buzzer_pin, 430, 80);
  delay(150);
  tone(buzzer_pin, 380, 80);
  delay(600);

  tone(buzzer_pin, 500, 60);
  delay(150);
  tone(buzzer_pin, 500, 80);
  delay(300);
  tone(buzzer_pin, 500, 60);
  delay(350);
  tone(buzzer_pin, 500, 80);
  delay(150);
  tone(buzzer_pin, 580, 80);
  delay(150);
  tone(buzzer_pin, 660, 80);
  delay(550);

  tone(buzzer_pin, 870, 80);
  delay(325);
  tone(buzzer_pin, 760, 80);
  delay(600);

  tone(buzzer_pin, 500, 60);
  delay(150);
  tone(buzzer_pin, 500, 80);
  delay(300);
  tone(buzzer_pin, 500, 60);
  delay(350);
  tone(buzzer_pin, 500, 80);
  delay(150);
  tone(buzzer_pin, 580, 80);
  delay(350);
  tone(buzzer_pin, 660, 80);
  delay(150);
  tone(buzzer_pin, 500, 80);
  delay(300);
  tone(buzzer_pin, 430, 80);
  delay(150);
  tone(buzzer_pin, 380, 80);
  delay(600);

  tone(buzzer_pin, 660, 100);
  delay(150);
  tone(buzzer_pin, 660, 100);
  delay(300);
  tone(buzzer_pin, 660, 100);
  delay(300);
  tone(buzzer_pin, 510, 100);
  delay(100);
  tone(buzzer_pin, 660, 100);
  delay(300);
  tone(buzzer_pin, 770, 100);
  delay(550);
  tone(buzzer_pin, 380, 100);
  delay(575);
}

void lcd_print(int x, int y, String message) {
  lcd.setCursor(x, y);
  lcd.print(message);
}