#define pinX A2
#define pinY A1

const int led1 = 11;
const int led2 = 10;
const int led3 = 9;
const int led4 = 6;
const int led5 = 5;
const int led6 = 3;
const int sel = 2;
int button1 = 0;
int button2 = 0;
int x, y;
bool selPressed;
int xSel = 0;
int ySel = 0;
int last;

int debounce(int last, int buttonNum){
  int current = analogRead(buttonNum);
  if(last != current){
    delay(5);
    current = analogRead(buttonNum);
  }
  return current;
}

int switchLed(int xSel){
  if(xSel == 0){
    analogWrite(led1, LOW);
  }
  if(xSel == 1){
    analogWrite(led1,HIGH);
    analogWrite(led2, LOW);
  }
  if(xSel == 2){
    analogWrite(led2,HIGH);
    analogWrite(led1, LOW);
    analogWrite(led3, LOW);
  }
  if(xSel == 3){
    analogWrite(led3,HIGH);
    analogWrite(led2, LOW);
    analogWrite(led4, LOW);
  }
  if(xSel == 4){
    analogWrite(led4,HIGH);
    analogWrite(led5, LOW);
    analogWrite(led3, LOW);
  }
  if(xSel == 5){
    analogWrite(led5,HIGH);
    analogWrite(led4, LOW);
    analogWrite(led6, LOW);
  }
  if(xSel == 6){
    analogWrite(led6,HIGH);
    analogWrite(led5, LOW);
    analogWrite(led4, LOW);
    analogWrite(led3, LOW);
    analogWrite(led2, LOW);
    analogWrite(led1, LOW);
  }
}

void brightness(int xSel, int ySel){
  int led;
  if(xSel == 1){
    led = led1;
  }
  if(xSel == 2){
    led = led2;
  }
  if(xSel == 3){
    led = led3;
  }
  if(xSel == 4){
    led = led4;
  }
  if(xSel == 5){
    led = led5;
  }
  if(xSel == 6){
    led = led6;
  }
  analogWrite(led, ySel);
}

void setup() {
  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
  pinMode(led3, OUTPUT);
  pinMode(led4, OUTPUT);
  pinMode(led5, OUTPUT);
  pinMode(led6, OUTPUT);
  pinMode(sel, INPUT_PULLUP);
  digitalWrite(sel, HIGH);
  pinMode(pinX, INPUT);
  pinMode(pinY, INPUT);
}


void loop() {
  x = debounce(last, pinX);
  y = debounce(last, pinY);
  selPressed = debounce(last, sel);
  selPressed = digitalRead(sel) == LOW;
  x = analogRead(pinX);
  y = analogRead(pinY);

  if((x>=1020) && (xSel!=0)){
    xSel--; 
  }
  if((x<=10) && (xSel!=6)){
    xSel++; 
  }
  if((y>=1020)&&(ySel<250)){
    ySel+=10;
  }
  if((y<=10) && (ySel>0)){
    ySel-=10;
  }
  if(selPressed == 1){
    xSel = 6; 
  }
  switchLed(xSel);
  brightness(xSel, ySel);
  delay(100);
}