public class Book {

	
	public static String description="I am a class modelling a book entity";
	private static int readingSpeed= 30;
	private String author;
	private String title;
	private int pageCount;
	private int currentPage;
	
	
	
	//The default constructor.	It doesn't take any input arguments. 
	//You can refer within methods to any variable by just using its name. There is no need for keyword this
	public Book() {     
		author="";
		title="";
		currentPage=1;
	}
	
	
	//Another constructor for initializing author and title while creating the corresponding object.
	//We need the keyword this to refer to instance variables, because method parameters have 
	//the same names and overshadow the instance variables
	public Book(String author, String title, int pageCount){
		this.author=author;
		this.title=title;
		this.pageCount=pageCount;
	}


	public String getAuthor() {
		return author;
	}

	public void setAuthor(String author) {
		this.author = author;
	}
	
	public String getTitle() {
		return title;
	}

	public void setTitle(String title) {
		this.title = title;
	}

	public int getCurrentPage() {
		return currentPage;
	}

	// We are assuming currentPage neves exceeds pageCount. Normally we need to check if this constraint holds 
	// before updating the value of the variable currentPage. Try to do that as exercise!
	public void setCurrentPage(int currentPage) {		
		this.currentPage = currentPage;			
	}
	
	public void turnPage() {		
		currentPage++;					
	}

	public String toString() {		
		return title+" "+author;
	}
	
	public boolean equals(Book b) {
		if(this.author.equals(b.getAuthor()) && this.title.equals(b.getTitle())){
			return true;
		}
		return false;
	}
	
	public int getEstimatedTimeLeft() {
		int timeleft= (pageCount-currentPage)*readingSpeed;
		return timeleft;
	}


	public int getPageCount() {
		return pageCount;
	}


	public void setPageCount(int pageCount) {
		this.pageCount = pageCount;
	}


	
	
}