#define S0 12
#define S1 13
#define S2 14

String pick [] {"Rock","Paper","Scissors"};
int numNames = sizeof(pick) / sizeof(pick[0]); 

int roundnum = 0;

int score1 = 0;
int score2 = 0; 

boolean button1State = LOW;
boolean button2State = LOW;
boolean button3State = LOW;

boolean state = true;

int btn1State = HIGH;
int btn2State = HIGH;
int btn3State = HIGH;

unsigned long lastBtn1Time = 0;
unsigned long lastBtn2Time = 0;
unsigned long lastBtn3Time = 0;
const unsigned long debounceDelay = 50;

void setup() {
  // put your setup code here, to run once:
  randomSeed(analogRead(0));
  pinMode(S0, INPUT_PULLUP);
  pinMode(S1, INPUT_PULLUP);
  pinMode(S2, INPUT_PULLUP);
  Serial.begin(9600);
  Serial.println("Welcome to Rock, Paper, Scissor Game!!");
  Serial.println("Please Choose A Button!!");
  Serial.println("--------------------------------------");
}

void loop() {
  unsigned long currentMillis = millis();
  int btn1Value = digitalRead(S0);
  int btn2Value = digitalRead(S1);
  int btn3Value = digitalRead(S2);

  if (btn1Value != btn1State && currentMillis - lastBtn1Time > debounceDelay) {
    btn1State = btn1Value;
    lastBtn1Time = currentMillis;
    if (btn1Value == LOW) {
      Serial.println("Button 1");
      String chose = "Rock"; 
      Serial.println("You Picked " + chose); // print a message to the serial monitor
      int randomIndex = random(0, numNames); // generate a random index
      String randomPick = pick[randomIndex]; // get the name at the random index
      Serial.println("Enemy Picked "+ randomPick); // print the random name to the serial monitor
      delay(1000);
      Serial.println("--------------------------------------");
      delay(1000);
      // decision(String randomPick, String chose, boolean& state)
      decision(randomPick,chose);
      Serial.println("\nSCORE!! \nYou: " + String(score1) + "  Enemy: " + String(score2));
      Serial.println("--------------------------------------");
      delay(1000);
      state = true; // set state to true to pause the loop
    }
  }

  if (btn2Value != btn2State && currentMillis - lastBtn2Time > debounceDelay) {
    btn2State = btn2Value;
    lastBtn2Time = currentMillis;
    if (btn2Value == LOW) {
      Serial.println("Button 2");
      String chose = "Paper"; 
      Serial.println("You Picked " + chose); // print a message to the serial monitor
      int randomIndex = random(0, numNames); // generate a random index
      String randomPick = pick[randomIndex]; // get the name at the random index
      Serial.println("Enemy Picked "+ randomPick); // print the random name to the serial monitor
      delay(1000);
      Serial.println("--------------------------------------");
      delay(1000);
      // decision(String randomPick, String chose, boolean& state)
      decision(randomPick,chose);
      Serial.println("\nSCORE!! \nYou: " + String(score1) + "  Enemy: " + String(score2));
      Serial.println("--------------------------------------");
      delay(1000);
      state = true; // set state to true to pause the loop
    }
  }

  if (btn3Value != btn3State && currentMillis - lastBtn3Time > debounceDelay) {
    btn3State = btn3Value;
    lastBtn3Time = currentMillis;
    if (btn3Value == LOW) {
      Serial.println("Button 3");
      String chose = "Scissors"; 
      Serial.println("You Picked " + chose); // print a message to the serial monitor
      int randomIndex = random(0, numNames); // generate a random index
      String randomPick = pick[randomIndex]; // get the name at the random index
      Serial.println("Enemy Picked "+ randomPick); // print the random name to the serial monitor
      delay(1000);
      Serial.println("--------------------------------------");
      delay(1000);
      // decision(String randomPick, String chose, boolean& state)
      decision(randomPick,chose);
      Serial.println("\nSCORE!! \nYou: " + String(score1) + "  Enemy: " + String(score2));
      Serial.println("--------------------------------------");
      delay(1000);
      state = true; // set state to true to pause the loop
    }
  }
}

void decision(String randomPick, String chose){
  
  Serial.println(chose + " (YOU) VS. " + String(randomPick) + " (COM) ");
  if (chose == randomPick) {
    Serial.println("Tie!");
    return;
  }
  else if ((chose == "Rock" && randomPick == "Scissors") || 
           (chose == "Paper" && randomPick == "Rock") || 
           (chose == "Scissors" && randomPick == "Paper")) {
    score1++;
    Serial.println("You Win!");
    if (score1 >= 5) {
      score1 = 0;
      score2 = 0;
      Serial.println("You have won the game! Score reset.");
    }
    return;
  }
  else {
    Serial.println("Computer Wins!");
    score2++;
    if (score2 >= 5) {
      score1 = 0;
      score2 = 0;
      Serial.println("You have lost the game! Score reset.");
    }
    return;
  }
  
}