#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 20, 4);

// FPS
#define FRAME_PER_SECOND 1

// Name should be not over 10 characters else it will default to HOME/AWAY
String TEAM_A_NAME = "TESTING_A";
String TEAM_B_NAME = "AWAY";

// Button Define
#define button_1Point 2
#define button_2Point 3
#define button_3Point 4
#define TEAMA_SELECT 5
#define TEAMB_SELECT 6
#define button_stopClk 7
#define resetSClk 8

// Score variables
int teamA_score = 0;
int teamB_score = 0;

void setup() {
  // LCD Initialization
  lcd.init();
  lcd.backlight();

  // Pinmode declaration
  pinMode(button_1Point, INPUT);
  pinMode(button_2Point, INPUT);
  pinMode(button_3Point, INPUT);
  pinMode(button_stopClk, INPUT);
}

void teamTextDraw(){
  // Number of strings
  int teamA_StringLength = TEAM_A_NAME.length();
  int teamB_StringLength = TEAM_B_NAME.length();
  
  // Display Team A Name
  if (teamA_StringLength > 10) {
    lcd.setCursor(0, 0);
    lcd.print("HOME");
  } else {
    lcd.setCursor(0, 0);
    lcd.print(TEAM_A_NAME);
  }

  // Display Team B Name
  if (teamB_StringLength > 10) {
    lcd.setCursor(20 - teamB_StringLength, 0);
    lcd.print("AWAY");
  } else {
    lcd.setCursor(20 - teamB_StringLength, 0);
    lcd.print(TEAM_B_NAME);
  }
}

void scoreDisplay(){
  // Draw Team A Score
  lcd.setCursor(1, 1);
  lcd.print(teamA_score);

  // Draw Team B Score
  lcd.setCursor(20 - (String(teamB_score).length() + 1), 1);
  lcd.print(teamB_score);
}

int secondCounter = 0;
int minuteCounter = 1;
int shotClockCounter = 0;
int quarter = 1;

void extraDetails(){
  int stopClockState = digitalRead(button_stopClk);
  if (stopClockState == LOW) {
    if (secondCounter == 59) {
      secondCounter = 0;
      if (minuteCounter == 12) {
        minuteCounter = 0;
        if (quarter == 4) {
          quarter = 1;
        } else {
          quarter++;
        }
      } else {
        minuteCounter++;
      }
    } else {
      secondCounter++;
    }

    // Shot Clock
    if (shotClockCounter == 24) {
      shotClockCounter = 0;
    } else {
      shotClockCounter++;
    }
  }

  // Game Clock Display Timer
  lcd.setCursor(0, 2);
  lcd.print("GClock:");
  lcd.setCursor(8,2);
  int seconds = 59 - secondCounter;
  int minutes = 12 - minuteCounter;
  lcd.print(String(minutes) + ":" + String(seconds));

  // Shot Clock Display Timer
  lcd.setCursor(0, 3);
  lcd.print("SClock:");
  int shotClock = 24 - shotClockCounter;
  lcd.setCursor(12, 3);
  lcd.print("Q" + String(quarter));
  lcd.setCursor(8,3);
  lcd.print(String(shotClock));
}

void scoreSystem(){
  if (digitalRead(TEAMA_SELECT) == HIGH) { // Selected Team A
    if (digitalRead(button_1Point)) {
      teamA_score++;
    } else if (digitalRead(button_2Point)) {
      teamA_score+= 2;
    } else if (digitalRead(button_3Point)) {
      teamA_score+= 3;
    }
  } else if (digitalRead(TEAMB_SELECT) == HIGH) { // Selected Team B
      if (digitalRead(button_1Point)) {
        teamB_score++;
      } else if (digitalRead(button_2Point)) {
        teamB_score+= 2;
      } else if (digitalRead(button_3Point)) {
        teamB_score+= 3;
      }
  }
}

void resetShotClock(){
  if(digitalRead(resetSClk)){
    shotClockCounter = 0;
  }
}

void scoreBoard(){
  extraDetails(); // Function to display details
  teamTextDraw(); // Function to display Team Names
  scoreDisplay(); // Function to display Score
  scoreSystem(); // Function to process score
  resetShotClock(); // Function to reset shot clock
}

void refresh() {
  delay((1/FRAME_PER_SECOND)*1000);
  lcd.clear();
}

void loop() {
  scoreBoard();
  refresh();
}