#include <LiquidCrystal.h>

const int rs = 12, en = 11, d4 = 5, d5 = 4, d6 = 3, d7 = 2;
LiquidCrystal lcd(rs, en, d4, d5, d6, d7);
const int button1 = 6, button2 = 7;
int state = 0;
int numDecks = 0;
int prevNumDecks = 1;
int delTimer = 50;
int prestate = 0;

void setup() {
  randomSeed(analogRead(0));
  pinMode(button1, INPUT);
  pinMode(button2, INPUT);
  lcd.begin(16, 2);
  //lcd.print("First line");
  //lcd.setCursor(0,1);
  //lcd.print("Second line");
  state = 0;
  lcd.print("welcome!");
  delay(1000);
}

int BS1() {
  int buttonState1 = digitalRead(button1);
  return buttonState1;
}

int BS2() {
  int buttonState2 = digitalRead(button2);
  return buttonState2;
}

int numAvaDecks(int deckCheck[], int numberDecks) {
  int sum = 0;
  for (int i = 0; i < numberDecks; i++) {
    if (deckCheck[i] == 1) {
      sum++;
    }
  }
  return sum;
}

int randDeck(int numDecks) {
  int randInt = random(0, numDecks);
  return randInt;
}

void loop() {
  //Deck Selection state
  if (state == 0) {
    lcd.clear();
    lcd.print("Number of decks?");
    while (state == 0) {
      lcd.setCursor(0,1);
      lcd.print(numDecks);
      if (BS1() == 1 && BS2() == 1) {
        state++;
      }
      //Decrement
      if (BS1() == 1) {
        delay(delTimer);
        if (BS1() == 0) {
          delay(delTimer);
          if (numDecks == 0) {
            continue;
          }
          else {
            prevNumDecks = numDecks;
            numDecks--;
            lcd.setCursor(0,1);
            lcd.print("                ");
          }
        }
      }
      //Increment
      if (BS2() == 1) {
        delay(delTimer);
        if (BS2() == 0) {
          delay(delTimer);
          prevNumDecks = numDecks;
          numDecks++;
          lcd.setCursor(0,1);
          lcd.print("                ");
        }
        //else {
          //continue;
        //}
      }
    }
  int decks[numDecks];
  //Array Generation state
  if(state == 1) {
    for (int i = 0; i<(sizeof decks/sizeof decks[0]); i++) {
      decks[i] = 1;
      lcd.clear();
      lcd.print("val: ");
      lcd.print(decks[i]);
      lcd.print(" pos: ");
      lcd.print(i);
      delay(1000);
      }
    }
    lcd.clear();
    lcd.print("array compiled");
    lcd.setCursor(0,1);
    lcd.print("Ava Decks: ");
    lcd.print(numAvaDecks(decks, numDecks));
    state++;
    //delay(5000);
    /*
    while (state == 1) {
      if (numAvaDecks(decks, numDecks) > 1) { 
        lcd.clear();
        lcd.setCursor(0,0);
        lcd.print("Test");
        lcd.setCursor(0,1);
        lcd.print(randDeck(numDecks));
        lcd.print(", ");
        lcd.print(randDeck(numDecks));
        delay(1000);
      }
    }
  */
  }
  //Deck Distribution state
  if(state == 2) {
    lcd.clear();
    lcd.print("Press a button");
    lcd.setCursor(0,1);
    lcd.print("to advance player");
    int player = 1;
    while (state == 2) {
      if (BS1() || BS2() == 1){
        delay(250);
        lcd.clear();
        lcd.print("Player ");
        lcd.print(player);
        player++;
      }
    }
  }
}