#include <Wire.h>
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 16, 2);  // set the LCD address to 0x27 for a 16 chars and 2 line display
bool activitySelected = false;  // Flag to track if an activity is selected

#define BUTTON_PIN 7

int Dpin1 = 13;
int PWM1 = 12;
int Dpin2 = 11;
int PWM2 = 10;
int Dpin3 = 9;
int PWM3 = 8;

int t = 100;
int led[] = {Dpin1, PWM1, Dpin2, PWM2, Dpin3, PWM3};
int turn = 2;

void printMenu() {
  Serial.println("\nPress A for Activity 3");
  Serial.println("Press B for Activity 4");
  Serial.println("Press C for Activity 5");
}

void setup() {
  lcd.init();        // initialize the lcd
  lcd.backlight();
  Wire.setClock(10000);
  lcd.setCursor(2, 0);
  lcd.print("Hello World!");
  lcd.setCursor(1, 1);
  lcd.print("Digital Logic.");
  for (int i = 0; i <= 6; i++) {
    pinMode(led[i], OUTPUT);
  }
  pinMode(BUTTON_PIN, INPUT_PULLUP);
  Serial.begin(9600);
  printMenu();
}

void ActThree() {
  Serial.print("Enter 8 character text: \n");
  
  String text = "";
  int count = 0;
  
  while (count < 8) {
    if (Serial.available()) {
      String c = Serial.readString();
      text += c;
      c.trim();
      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print(c);
      count++;
      if(c == 'E'){
        count = 1;
      }
    }
  }
  
  Serial.print("Received text: ");
  Serial.println(text);
}

void ActFour(){
  Serial.print("Enter 8 character text: \n");
  
  String text = "";
  int count = 0;

  while (count < 8) {
    if (Serial.available()) {
      String c = Serial.readString();
      text += c;
      c.trim();
      for(int i = 0; i <= 16 + c.length(); i++){
      lcd.clear();
      lcd.noCursor();
      lcd.setCursor(i, 0);
      lcd.print(c);
      lcd.setCursor(i, 1);
      lcd.print(c);
      delay(400);
      lcd.clear();
      }
      count++;
    }
  }
  
  Serial.print("Received text: ");
  Serial.println(text);
} 

void ActFive() {
  int buttonState;
  int lastButtonState = LOW; 
  int pressCount = 0;

  while (true) {
    buttonState = digitalRead(BUTTON_PIN);

    if (buttonState == HIGH && lastButtonState == LOW) {
      delay(50);  
      buttonState = digitalRead(BUTTON_PIN); 
      
      if (buttonState == HIGH) {
        pressCount++;

        if (pressCount == 1) {
          lcd.clear();
          lcd.setCursor(0, 0);
          lcd.print("Pattern 1 selected");
          lcd.setCursor(0, 1);
          lcd.print("Pattern 2");
          for(int i = 0; i<=turn; i++){
            for(int i = 0; i <= 8; i++){
              digitalWrite(led[i],HIGH);
              delay(t);
            }
          for(int i = 8; i >= 0; i--){
            digitalWrite(led[i],LOW);
            delay(t);
          }
        }
        } else if (pressCount == 2) {
          lcd.clear();
          lcd.setCursor(0, 0);
          lcd.print("Pattern 1");
          lcd.setCursor(0, 1);
          lcd.print("Pattern 2 selected");
          for(int i = 0; i <= turn; i++){
            for(int i = 0; i <= 2; i++){
              digitalWrite(led[i],HIGH);
            }
          delay(500);
            for(int i = 0; i <= 4; i++){
              digitalWrite(led[i],LOW);
            }
          
            for(int i = 3; i <= 6; i++){
              digitalWrite(led[i],HIGH);
            }
          delay(500);
            for(int i = 3; i <= 6; i++){
              digitalWrite(led[i],LOW);
            }
          }
        }

        if (pressCount >= 2) {
          pressCount = 0;
        }
      }
    }

    lastButtonState = buttonState;

    if (Serial.available() > 0) {
      String input = Serial.readStringUntil('\n');
      input.trim(); 
      
      if (input.equalsIgnoreCase("Exit")) {
        break; 
      }
    }

    delay(10);
  }
}

void loop() { 
   while(Serial.available()){
    char j = (char)Serial.read();
    if(j == 'A'){
      ActThree();
      printMenu();
    }
    if(j == 'B'){
      ActFour();
      printMenu();
    }
    if(j == 'C'){
      ActFive();
      printMenu();
      }
    }
}