#include <SD.h>
#include <ezButton.h>

File file;

ezButton next(2);
ezButton prev(3);
ezButton select_book(4);
ezButton open_book(5);

// keeps track of which book is to be read 
int book_num = 0;
int book_state = 0;


void setup() 
{
    Serial.begin(9600);
    if (!SD.begin())
        Serial.println("SD card not detected");
    else 
        Serial.println("SD card detected");
    
    // file = SD.open("harry.txt" , FILE_READ); 
    // Serial.print("Total Characters: ");
    // Serial.println(file.size());

    // if(file)
    // {
    //     Serial.println("Harry Potter");
    //     delay(2000);
    //     while (file.available())
    //     {
    //         char data = file.read();
    //         Serial.print(data);
    //     }
    //     Serial.println();
    //     file.close();
    // }
    // Serial.println("File read successfully");

    next.setDebounceTime(50);
    prev.setDebounceTime(50);
    select_book.setDebounceTime(50);
    open_book.setDebounceTime(50);
}

void loop() 
{
    next.loop();
    prev.loop();
    select_book.loop();
    open_book.loop();

    if (next.isPressed())
          book_num++;
    else if (prev.isPressed())
          book_num--;
  
    // makes sure doesn't go past 0 or 1 as only 2 books present.
    book_num = constrain(book_num,0,1);

    //checks which book is selected
    check_book();
}

void check_book()
{
  if (book_num)
      Serial.println("Think and Grow Rich!");
  else
      Serial.println("Harry Potter!");

}