#include <LiquidCrystal_I2C.h>

#define I2C_ADDR    0x27
#define LCD_COLUMNS 16
#define LCD_LINES   2

#define VERT_PIN A1
#define HORZ_PIN A2
#define SEL_PIN  12

LiquidCrystal_I2C lcd(I2C_ADDR, LCD_COLUMNS, LCD_LINES);

const int analogPin = A0;   
const int ledCount = 10; 

int ledCountNow;
int checkLevel = 0;

int sensorReading;
int procLevel;

int ledPins[] = {
  2, 3, 4, 5, 6, 7, 8, 9, 10, 11
};   

void resist(){
  sensorReading = analogRead(analogPin);
  procLevel = map(sensorReading, 0, 1023, 0, 100);

  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Potentiometer");
  lcd.setCursor(1, 1);
  lcd.print(procLevel);
  lcd.setCursor(4, 1);
  lcd.print("%");

  while(1){
    sensorReading = analogRead(analogPin);
    procLevel = map(sensorReading, 0, 1023, 0, 100);
    int ledLevel = map(sensorReading, 0, 1023, 0, ledCount);

    
    if(checkLevel != ledLevel){
      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print("Potentiometer");
      lcd.setCursor(1, 1);
      lcd.print(procLevel);
      lcd.setCursor(4, 1);
      lcd.print("%");
      for (int thisLed = 0; thisLed < ledCount; thisLed++) {
        if (thisLed < ledLevel) {
          digitalWrite(ledPins[thisLed], HIGH);
        }
        else {
          digitalWrite(ledPins[thisLed], LOW);
        }
      }
    }
    checkLevel = ledLevel;
    
    if (digitalRead(SEL_PIN) == LOW) {
      break;
    }
    delay(100);
  }  
}

void joystick(){
  ledCountNow = checkLevel;
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Joystick");
  lcd.setCursor(1, 1);
  lcd.print(ledCountNow);

  while(1){

    int horz = analogRead(HORZ_PIN);
    int vert = analogRead(VERT_PIN);
 
    if (vert > 300) {
      if(ledCountNow < 11) ledCountNow++;
    }
    if (vert < 700) {
      if(ledCountNow > 0) ledCountNow--;
    }
    if (horz < 700) {
      if(ledCountNow < 11) ledCountNow++;
    }
    if (horz > 300) {
      if(ledCountNow > 0) ledCountNow--;
    }

    if(checkLevel != ledCountNow){
      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print("Joystick");
      lcd.setCursor(1, 1);
      lcd.print(ledCountNow);

      for (int thisLed = 0; thisLed < ledCount; thisLed++) {
        if (thisLed < ledCountNow) {
          digitalWrite(ledPins[thisLed], HIGH);
        }
        else {
          digitalWrite(ledPins[thisLed], LOW);
        }
      }
    }

    checkLevel = ledCountNow;
    
    if (digitalRead(SEL_PIN) == LOW) {
      break;
    }
    delay(100);
  }
 
}

void setup() {
 
  lcd.init();
  lcd.backlight();

  for (int thisLed = 0; thisLed < ledCount; thisLed++) {
    pinMode(ledPins[thisLed], OUTPUT);
  }

  pinMode(VERT_PIN, INPUT);
  pinMode(HORZ_PIN, INPUT);
  pinMode(SEL_PIN, INPUT_PULLUP);
}

void loop() {
  resist();
  delay(300);
  joystick();
  delay(300);
}