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

const byte ledPins[] = {14, 15, 16, 17, 11, 12};

#define SPEAKER_PIN 13

#define MAX_GAME_LENGTH 100

const int gameTones[] = { NOTE_G3, NOTE_C4, NOTE_E4, NOTE_G5};
int speed = 300;
int  gameSequence[MAX_GAME_LENGTH] = {0};
byte gameIndex = 0;
int score = 0;
int maxscore = 0;
const uint8_t ROWS = 4;
const uint8_t COLS = 4;
uint8_t colPins[COLS] = { 5, 4, 3, 2 };
uint8_t rowPins[ROWS] = { 9, 8, 7, 6 };
char  keys[ROWS][COLS] = {
  { 'A', 'B', 'C', 'D' },
  { 'E', 'F', 'G', 'H' },
  { 'I', 'J', 'K', 'L' },
  { 'M', 'O', 'P', 'Q' }
};
Keypad keypad = Keypad(makeKeymap(keys), rowPins, colPins, ROWS, COLS);
LiquidCrystal_I2C lcd(0x27, 20, 4);

char key = NO_KEY;

void setup() {
  lcd.init();
  lcd.backlight();
  lcd.setCursor(1, 0);
  lcd.print("GOOD LUCK!");
  lcd.setCursor(1, 1);
  lcd.print("HAVE FUN!");
  delay(1000);
  lcd.clear();
  Serial.begin(9600);
  for (byte i = 0; i < 7; i++) {
    pinMode(ledPins[i], OUTPUT);
  }
  pinMode(SPEAKER_PIN, OUTPUT);
  randomSeed(analogRead(A7));
}


void lightLedAndPlayTone(byte ledIndex) {
  Serial.println(ledIndex);
  digitalWrite(ledPins[ledIndex - 65], HIGH);
  tone(SPEAKER_PIN, gameTones[ledIndex - 65]);
  delay(speed);
  digitalWrite(ledPins[ledIndex - 65], LOW);
  noTone(SPEAKER_PIN);
}

void playSequence() {
  for (int i = 0; i < gameIndex; i++) {
    byte currentLed = gameSequence[i];
    lightLedAndPlayTone(currentLed);
    delay(100);
  }
}


byte readButtons() {
  while(key == NO_KEY) {
      key = keypad.getKey();
      if (key != NO_KEY) {
        Serial.println(key);
        return key;
      }
      delay(100);
    }
    delay(1000);
  }


void gameOver() {
  lcd.clear();
  lcd.setCursor(1, 0);
  lcd.print("GAME OVER :(");
  delay(1000);
  lcd.setCursor(1, 0);
  lcd.print("Your score : ");
  lcd.setCursor(14, 0);
  lcd.print(score);
  lcd.setCursor(1, 1);
  lcd.print("High score : ");
  lcd.setCursor(14, 1);
  lcd.print(maxscore);
  gameIndex = 0;
  delay(1000);
  lcd.clear();
  score = 0;
  tone(SPEAKER_PIN, NOTE_DS5);
  delay(300);
  tone(SPEAKER_PIN, NOTE_D5);
  delay(300);
  tone(SPEAKER_PIN, NOTE_CS5);
  delay(300);
  for (byte i = 0; i < 10; i++) {
    for (int pitch = -10; pitch <= 10; pitch++) {
      tone(SPEAKER_PIN, NOTE_C5 + pitch);
      delay(5);
    }
  }
  noTone(SPEAKER_PIN);
  delay(500);
}

bool checkUserSequence() {
  for (int i = 0; i < gameIndex; i++) {
    byte expectedButton = gameSequence[i];
    Serial.println(expectedButton);
    byte actualButton = readButtons();
    key = NO_KEY;
    lightLedAndPlayTone(actualButton);
    if (expectedButton != actualButton) {
      return false;
    }
  }

  return true;
}


void playLevelUpSound() {
  tone(SPEAKER_PIN, NOTE_E4);
  delay(150);
  tone(SPEAKER_PIN, NOTE_G4);
  delay(150);
  tone(SPEAKER_PIN, NOTE_E5);
  delay(150);
  tone(SPEAKER_PIN, NOTE_C5);
  delay(150);
  tone(SPEAKER_PIN, NOTE_D5);
  delay(150);
  tone(SPEAKER_PIN, NOTE_G5);
  delay(150);
  noTone(SPEAKER_PIN);
}


void loop() {
  lcd.setCursor(1, 0);
  lcd.print("Your score : ");
  lcd.setCursor(14, 0);
  lcd.print(score);
  lcd.setCursor(1, 1);
  lcd.print("High score : ");
  lcd.setCursor(14, 1);
  lcd.print(maxscore);
  gameSequence[gameIndex] = random(65, 71);
  gameIndex++;
  if (gameIndex >= MAX_GAME_LENGTH) {
    gameIndex = MAX_GAME_LENGTH - 1;
  }

  playSequence();
  if (!checkUserSequence()) {
    gameOver();
  } else {
    Serial.println(speed);
    score = score + 1;
    if (score == maxscore || score > maxscore)
      maxscore = score;
    if (speed >= 50)
      speed = speed - 20;
  }

  delay(300);

  if (gameIndex > 0) {
    playLevelUpSound();
    delay(300);
  }
}