#include <LiquidCrystal_I2C.h>  // versie 18/12/2023

#define I2C_ADDR    0x27
#define LCD_COLUMNS 16
#define LCD_LINES   2
#define PIN_POT A2
#define PIN_BUT 7
#define BUZZER 8


// States
#define GAME_ON 0
#define CHANGE_BEKER 1
#define NEW_DRUPJE 2
#define CHECK_POINTS 3

// functions
void drawBeker();
void gaNaarNieuwePos ();
void checkInputPot();
void checkpoints();
void drawDruppel();



LiquidCrystal_I2C lcd(I2C_ADDR, LCD_COLUMNS, LCD_LINES);

uint8_t char0[8] = {17, 17, 31,  4,  4,  4,  4, 31}; // bekertje
uint8_t char1[8][8] = {
  {4, 0, 0, 0, 0, 0, 0, 0},
  {0, 4, 0, 0, 0, 0, 0, 0},
  {0, 0, 4, 0, 0, 0, 0, 0},
  {0, 0, 0, 4, 0, 0, 0, 0},
  {0, 0, 0, 0, 4, 0, 0, 0},
  {0, 0, 0, 0, 0, 4, 0, 0},
  {0, 0, 0, 0, 0, 0, 4, 0},
  {0, 0, 0, 0, 0, 0, 0, 4}
}; // drupje

int speed = 250;
const int VERSNELLING = 20;
byte teller = 0;
int oldValue = 0;
byte statelcd = GAME_ON;
byte posDruppel;
byte posBeker;
int score = 0;
int highScore = 0;
const int DREMPEL = 3;

void setup() {
  Serial.begin(9600);
  pinMode(A2, INPUT);
  // Init
  randomSeed(analogRead(A2));
  posDruppel = random(15);
  lcd.init();
  lcd.backlight();

  lcd.createChar(0, char0);
  lcd.setCursor(0, 1);
  lcd.print(char(0));

}

void loop() {

  switch (statelcd) {
    case GAME_ON :
      drawDruppel();    //0
      checkInputPot();
      break;
    case CHANGE_BEKER:   // 1
      drawBeker();
      break;
    case NEW_DRUPJE:   // 2
      gaNaarNieuwePos ();
      statelcd = GAME_ON;
      break;
    case CHECK_POINTS: //3
      checkpoints();
      statelcd = NEW_DRUPJE;
      break;
    default:
      Serial.println("Error  ");
  }
}


//  definitie  functie  :::

void drawDruppel() {
  if ( millis() % speed
       > speed
       - 5 ) {
    if (teller % 8 == 7) {
      statelcd = CHECK_POINTS;
    }
    lcd.createChar(1, char1[ teller % 8 ]);
    lcd.setCursor(posDruppel, 0);
    lcd.print(char(1));
    teller++;
  }
}

void checkInputPot() {
  if (analogRead(PIN_POT) != oldValue) {
    oldValue = analogRead(PIN_POT);
    statelcd = CHANGE_BEKER;
  }
}





void drawBeker() {
  posBeker = map(analogRead(PIN_POT), 0, 1023, 0, 15);
  lcd.setCursor(0, 1);

  for (int i = 0 ; i < posBeker; i++) {
    lcd.print(" "); // blanco
  }

  lcd.print(char(0)); // bekertje

  for (int i = posBeker + 1 ; i < 16; i++) {
    lcd.print(char(254));  // blanco
  }

  statelcd = GAME_ON;
}

void checkpoints() {
  if (posDruppel == posBeker) {
    score++;
    speed = speed - 10;
    tone (BUZZER, 880, 200);
    if (score > highScore) {
      highScore = score;
    }
    if(score %DREMPEL > DREMPEL){
      speed = speed - VERSNELLING;
    }
    Serial.print("aantal punten = ");
    Serial.print(score);
    Serial.print( " je persoonlijk record is = ");
    Serial.println(highScore);

  } else {
    score = 0;
    speed = 200;
    Serial.println("druppel gesmost, start opnieuw");
    tone (BUZZER, 220, 200);

  }
}

void gaNaarNieuwePos () {

  lcd.setCursor(posDruppel, 0);
  lcd.print(" ");
  posDruppel = random(16);
}