import java.awt.*;
import java.applet.*;
import java.awt.event.*;

public class BookApplet extends Applet implements ActionListener
{




	//Declare panels
	Panel myInputPanel = new Panel();
	Panel myButtonPanel = new Panel();
	Panel myHeaderPanel = new Panel();
	Panel myResultPanel = new Panel();
	Color myColor = new Color(80,175,130);

	Font myFont = new Font("Arial",1,18);


	//declare all button and labels
	private TextField myTextField1 = new TextField(15);
	private TextField myTextField2 = new TextField(15);
	private TextField myTextField3 = new TextField(15);
	private TextField myTextField4 = new TextField(15);
	private Button myButton1 = new Button("Enter Book");
	private Button myButton2= new Button("Clear Screen");
	private Button myButton3= new Button("Average Book price");
	private Label myLabel1  = new Label("Enter book ID",1);
	private Label myLabel2  = new Label("Enter book name",1);
	private Label myLabel3  = new Label("Enter number of books",1);
	private Label myLabel4  = new Label("Enter price of the book",1);
	private Label myResult1 = new Label("",1);
	private Label myResult2 = new Label("",1);
	private Label myHeader = new Label("Welcome to myBook Screen",1);

	private Book myBook;
	private BookList myBookList = new BookList(3);


	public BookApplet()
	//Add the action listener to the button and labels
	{

	 myHeaderPanel.add(myHeader);
	 myInputPanel.setLayout (new GridLayout(4,2));
	 myResultPanel.setLayout (new GridLayout(2,2));
	 myHeader.setFont(myFont);
	 myHeaderPanel.setForeground(myColor);

	 myInputPanel.add(myLabel1);
	 myInputPanel.add(myTextField1);
	 myInputPanel.add(myLabel2);
	 myInputPanel.add(myTextField2);
	 myInputPanel.add(myLabel3);
	 myInputPanel.add(myTextField3);
	 myInputPanel.add(myLabel4);
	 myInputPanel.add(myTextField4);

	 myButtonPanel.add(myButton1);
	 myButtonPanel.add(myButton2);
	 myButtonPanel.add(myButton3);

	 myResultPanel.add(myResult1);
	 myResultPanel.add(myResult2);

	 this.myButton1.addActionListener(this);
	 this.myButton2.addActionListener(this);
	 this.myButton3.addActionListener(this);


	 myButton1.addActionListener(this);
	 myButton2.addActionListener(this);
	 myButton3.addActionListener(this);

	 add(myHeaderPanel);
	 add(myInputPanel);
	 add(myButtonPanel);
	 add(myResultPanel);
	}


	public void loadBook()
		{
			myBook = new Book(myTextField1.getText(),myTextField2.getText());
			myBook.enterdetails(myTextField3.getText(),myTextField4.getText());

			if(myBookList.add(myBook))
			{
				myResult1.setText("The Book has been Loaded");
			}
			else
			{
				myResult1.setText("There's no more space in the array");
			}

		}

	public void clearScreen()
	{
		myTextField1.setText("");
		myTextField2.setText("");
		myTextField3.setText("");
		myTextField4.setText("");

	}

	public void actionPerformed(ActionEvent e)
	{
		String myAverage;
		if(e.getSource()==myButton1)
		{
				loadBook();
				clearScreen();
		}
		if(e.getSource()==myButton3)
		{
			  if (myStudent!=null)
			   {
				 myAverage = "Student Average is: " + myStudent.calculateAverage();
				 myResult1.setText(myAverage);
		}
		   else
		{
			myResult1.setText("No Student has been loaded");
		}
		 }
		if(e.getSource()==allAveragesButton)
		    {
				myResult2.setText("The average for all the books is" + myBookList.BookListAverage());
		}
	}
	}
	{
}