#include <LiquidCrystal.h>

const int buttonPin = 8;
int buttonState = LOW;
int lastButtonState = LOW; // Assume button starts unpressed (PULLUP)
unsigned long lastTapTime = 0;
int tapCount = 0;
bool flag = true;

int targetSequence[] = {0,1,0};

int currentPosition = 0;

int randomNumOne, randomNumTwo, randomNumThree;

double moneyCount = 50;

LiquidCrystal lcdOne(22, 23, 4, 5, 6, 7);
LiquidCrystal lcdTwo(24, 25, 10, 11, 12, 13);
LiquidCrystal lcdThree(14, 15, 16, 17, 18, 19);

void setup() {
  Serial.begin(9600);
  Serial.print("£");  // Try direct symbol (works in some IDEs)
  Serial.println(moneyCount);

  randomSeed(analogRead(A0));

  pinMode(buttonPin, INPUT); // Button to GND
  
  lcdOne.begin(16, 2);
  lcdTwo.begin(16, 2);
  lcdThree.begin(16, 2);
}

void loop() {
  buttonState = digitalRead(buttonPin);

  if (buttonState == HIGH && flag == true && tapCount != 7) {
    singleClick();
    delay(50);
    flag = false;
    checkSequence(randomNumOne, randomNumTwo, randomNumThree);
    }
  if(buttonState == LOW){
    flag = true;
    delay(50);
  }

  // Detect button press (LOW due to PULLUP)
  if (buttonState == LOW && lastButtonState == HIGH) {

        // Check if taps are within 0.85s of each other
      if (millis() - lastTapTime < 850) {
        tapCount++;
      } else {
        tapCount = 1; // Reset if too slow
      }
      lastTapTime = millis(); // Update last tap time
    }

    // If 7 taps are registered, show "7" after 0.85s delay
    if (tapCount == 7 && millis() - lastTapTime >= 850) {
      showSeven();
      tapCount = 0; // Reset counter
    }
    
  lastButtonState = buttonState;
}

void showSeven() {
  if (currentPosition == 0){
    lcdOne.clear();
    int displayNumberOne = 7;
    lcdOne.print(displayNumberOne);
    if(displayNumberOne == targetSequence[0]){
      currentPosition = currentPosition + 1;
    }
    return;
  }
  if (currentPosition == 1){
    lcdTwo.clear();
  lcdTwo.print("7");
  }
  if (currentPosition == 2){
    lcdThree.clear();
  lcdThree.print("7");
  }
}

void singleClick(){
  moneyCount = moneyCount - 1;
  Serial.print("£");  // Try direct symbol (works in some IDEs)
  Serial.println(moneyCount);

  randomNumOne = random(0, 2);
  randomNumTwo = random(0, 2);  // Generates a number between 0-999
  randomNumThree = random(0, 2);  // Generates a number between 0-999


  lcdOne.clear();
  lcdOne.setCursor(0, 1);  // Move to 2nd line
  lcdOne.print(randomNumOne);

  lcdTwo.clear();
  lcdTwo.setCursor(0, 1);
  lcdTwo.print(randomNumTwo);

  lcdThree.clear();
  lcdThree.setCursor(0, 1);
  lcdThree.print(randomNumThree);
}

void checkSequence(int one, int two, int three){
  if (one == targetSequence[0] && two == targetSequence[1] && three == targetSequence[2]){
    Serial.println("You Win Collect £60");
    moneyCount = moneyCount + 60;
    Serial.print("£");  // Try direct symbol (works in some IDEs)
    Serial.println(moneyCount);
  }
}