int buttonPin = A0;
int buttonState, buttonStateOld;
int counter = 0;
int pressCounter = 0;

int count1 = 0;
int count2 = 0;
int vert = A1;
int horz = A2;
int btn = 12;
int vertState,vertStateOld;
int horzState,horzStateOld;
String pos;

int A = 7;
int B = 8;
int C = 2;
int D = 3;
int E = 4;
int F = 5;
int G = 6;
int dig1 = 11;
int dig2 = 10;
int dig3 = 13;
int dig4 = 9;
int num = 0;

long startTime;

void setup() {
  // put your setup code here, to run once:
  pinMode(A, OUTPUT);
  pinMode(B, OUTPUT);
  pinMode(C, OUTPUT);
  pinMode(D, OUTPUT);
  pinMode(E, OUTPUT);
  pinMode(F, OUTPUT);
  pinMode(G, OUTPUT);
  pinMode(dig1, OUTPUT);
  pinMode(dig2, OUTPUT);
  pinMode(dig3, OUTPUT);
  pinMode(dig4, OUTPUT);
  pinMode(buttonPin, INPUT);
  Serial.begin(9600);
  Serial.println("the program is live!");
}


void loop() {

  project1();
}

void fourDigSevSegTest (){
  number1();
  delay(100);
  clear();
  delay(50);
  number2();
  delay(100);
  clear();
  delay(50);
}

void project2(){
  vertState = analogRead(vert);
  horzState = analogRead(horz);
  if (vertState == 1023 && horzState == 512) {
    pos = "up";
    delay(100);
  }
  else if (vertState == 0 && horzState == 512) {
    pos = "down";
    delay(100);
  }
  else if (vertState == 512 && horzState == 0) {
    pos = "right";
    delay(100);
  }
  else if (vertState == 512 && horzState == 1023) {
    pos = "left";
    delay(100);
  }
  else if (vertState == 1023 && horzState == 1023){
    pos = "up-left";
    delay(100);
  }
  else if (vertState == 1023 && horzState == 0){
    pos = "up-right";
    delay(100);
  }
  else if (vertState == 0 && horzState == 0){
    pos = "down-right";
    delay(100);
  }
  else if (vertState == 0 && horzState == 1023){
    pos = "down-left";
    delay(100);
  }
  Serial.println(pos);

  
}

void joystickTest(){
  Serial.print(analogRead(vert));
  Serial.print(" - ");
  Serial.print(digitalRead(btn));
  Serial.print(" - ");
  Serial.println(analogRead(horz));

}

void project1(){
  vertState = analogRead(vert);
  horzState = analogRead(horz);
  if (vertState == 1023 && vertStateOld == 512) {
    count1++;
    delay(100);
  }
  if (vertState == 0 && vertStateOld == 512) {
    count1--;
    delay(100);
  }
  if (horzState == 1023 && horzStateOld == 512) {
    count2++;
    delay(100);
  }
  if (horzState == 0 && horzStateOld == 512) {
    count2--;
    delay(100);
  }
  else{
    delay(50);
  }
  vertStateOld = vertState;
  horzStateOld = horzState;
  Serial.print(count1);
  Serial.print(" - ");
  Serial.println(count2);
}

void numberRoll_playPause() {
  buttonState = !analogRead(buttonPin);
  if(buttonState == !0 && buttonStateOld == 0){
    pressCounter++;
    if(pressCounter % 2 == 1){
      Serial.println(num);
    }
  }
  else{
    delay(1);
  }
  buttonStateOld = buttonState;

  if(pressCounter % 2 == 1){
    num++;
    if(num == 10000){
      num = 0;
    }
  }
  int a=num/1000;
  int b=num/100 - a*10;
  int d=num%10;
  int c=(num%100 - d)/10;
  
  digitalWrite(dig1, LOW);
  digitalWrite(dig2, HIGH);
  digitalWrite(dig3, HIGH);
  digitalWrite(dig4, HIGH);
  showDigit(a);
  delay(5);
  clear();
  delay(1);
  digitalWrite(dig1, HIGH);
  digitalWrite(dig2, LOW);
  digitalWrite(dig3, HIGH);
  digitalWrite(dig4, HIGH);
  showDigit(b);
  delay(5);
  clear();
  delay(1);
  digitalWrite(dig1, HIGH);
  digitalWrite(dig2, HIGH);
  digitalWrite(dig3, LOW);
  digitalWrite(dig4, HIGH);
  showDigit(c);
  delay(5);
  clear();
  delay(1);
  digitalWrite(dig1, HIGH);
  digitalWrite(dig2, HIGH);
  digitalWrite(dig3, HIGH);
  digitalWrite(dig4, LOW);
  showDigit(d);
  delay(5);
  clear();
  delay(1);

}

void fourDigitDisplay(){
  if(Serial.available() > 0){
    num = Serial.read()-'0';
    Serial.println(num);

    
  }
  fourDigitShow(num);
}

void fourDigitShow(int num){
  int a=num/1000;
  int b=num/100 - a*10;
  int d=num%10;
  int c=(num%100 - d)/10;


  digitalWrite(dig1, LOW);
  digitalWrite(dig2, HIGH);
  digitalWrite(dig3, HIGH);
  digitalWrite(dig4, HIGH);
  showDigit(a);
  delay(5);
  clear();
  delay(1);
  digitalWrite(dig1, HIGH);
  digitalWrite(dig2, LOW);
  digitalWrite(dig3, HIGH);
  digitalWrite(dig4, HIGH);
  showDigit(b);
  delay(5);
  clear();
  delay(1);
  digitalWrite(dig1, HIGH);
  digitalWrite(dig2, HIGH);
  digitalWrite(dig3, LOW);
  digitalWrite(dig4, HIGH);
  showDigit(c);
  delay(5);
  clear();
  delay(1);
  digitalWrite(dig1, HIGH);
  digitalWrite(dig2, HIGH);
  digitalWrite(dig3, HIGH);
  digitalWrite(dig4, LOW);
  showDigit(d);
  delay(5);
  clear();
  delay(1);
}

void showDigit(int digit) {
  switch(digit) {
    case 0:
    number0();
    break;
    case 1:
    number1();
    break;
    case 2:
    number2();
    break;
    case 3:
    number3();
    break;
    case 4:
    number4();
    break;
    case 5:
    number5();
    break;
    case 6:
    number6();
    break;
    case 7:
    number7();
    break;
    case 8:
    number8();
    break;
    case 9:
    number9();
    break;
  }
}

void clear() {
  digitalWrite(A, LOW);
  digitalWrite(B, LOW);
  digitalWrite(C, LOW);
  digitalWrite(D, LOW);
  digitalWrite(E, LOW);
  digitalWrite(F, LOW);
  digitalWrite(G, LOW);
}

void number0 () {
  digitalWrite(A, HIGH);
  digitalWrite(B, HIGH);
  digitalWrite(C, HIGH);
  digitalWrite(D, HIGH);
  digitalWrite(E, HIGH);
  digitalWrite(F, HIGH);
  digitalWrite(G, LOW);
}

void number1 () {
  digitalWrite(A, LOW);
  digitalWrite(B, HIGH);
  digitalWrite(C, HIGH);
  digitalWrite(D, LOW);
  digitalWrite(E, LOW);
  digitalWrite(F, LOW);
  digitalWrite(G, LOW);
}

void number2() {
  digitalWrite(A, HIGH);
  digitalWrite(B, HIGH);
  digitalWrite(C, LOW);
  digitalWrite(D, HIGH);
  digitalWrite(E, HIGH);
  digitalWrite(F, LOW);
  digitalWrite(G, HIGH);
}

void number3() {
  digitalWrite(A, HIGH);
  digitalWrite(B, HIGH);
  digitalWrite(C, HIGH);
  digitalWrite(D, HIGH);
  digitalWrite(E, LOW);
  digitalWrite(F, LOW);
  digitalWrite(G, HIGH);
}

void number4() {
  digitalWrite(A, LOW);
  digitalWrite(B, HIGH);
  digitalWrite(C, HIGH);
  digitalWrite(D, LOW);
  digitalWrite(E, LOW);
  digitalWrite(F, HIGH);
  digitalWrite(G, HIGH);
}

void number5() {
  digitalWrite(A, HIGH);
  digitalWrite(B, LOW);
  digitalWrite(C, HIGH);
  digitalWrite(D, HIGH);
  digitalWrite(E, LOW);
  digitalWrite(F, HIGH);
  digitalWrite(G, HIGH);
}

void number6() {
  digitalWrite(A, HIGH);
  digitalWrite(B, LOW);
  digitalWrite(C, HIGH);
  digitalWrite(D, HIGH);
  digitalWrite(E, HIGH);
  digitalWrite(F, HIGH);
  digitalWrite(G, HIGH);
}

void number7() {
  digitalWrite(A, HIGH);
  digitalWrite(B, HIGH);
  digitalWrite(C, HIGH);
  digitalWrite(D, LOW);
  digitalWrite(E, LOW);
  digitalWrite(F, LOW);
  digitalWrite(G, LOW);
}

void number8() {
  digitalWrite(A, HIGH);
  digitalWrite(B, HIGH);
  digitalWrite(C, HIGH);
  digitalWrite(D, HIGH);
  digitalWrite(E, HIGH);
  digitalWrite(F, HIGH);
  digitalWrite(G, HIGH);
}

void number9() {
  digitalWrite(A, HIGH);
  digitalWrite(B, HIGH);
  digitalWrite(C, HIGH);
  digitalWrite(D, HIGH);
  digitalWrite(E, LOW);
  digitalWrite(F, HIGH);
  digitalWrite(G, HIGH);
}

void negative() {
  digitalWrite(A, LOW);
  digitalWrite(B, LOW);
  digitalWrite(C, LOW);
  digitalWrite(D, LOW);
  digitalWrite(E, LOW);
  digitalWrite(F, LOW);
  digitalWrite(G, HIGH);
}