import javax.swing.*;

import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;

public class BirdListGUI extends JFrame{
	
	private JPanel listPanel;
	private JPanel buttonPanel;
	private JList birdList;
	private JLabel label;
	private JButton revButton;
	
	public BirdListGUI() {
		super("Bird List");
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		setLayout(new BorderLayout());
		
		//build panels
		buildListPanel();
		buildButtonPanel();
		
		//add panels
		add(listPanel, BorderLayout.WEST);
		add(buttonPanel, BorderLayout.SOUTH);
		pack();
		setVisible(true);
	}
	
	public void buildListPanel() {
		listPanel = new JPanel();
		label = new JLabel("Birds");
		
		BirdList list = new BirdList();
		try {
			Scanner input1 = new Scanner(new File("birds1.txt"));
			Scanner input2 = new Scanner(new File("birds2.txt"));
			while (input1.hasNext()) //Populate list
				list.insert(input1.nextLine());
			while (input2.hasNext()) //Remove non-indigenous birds
				list.remove(input2.nextLine());
		}
		catch(FileNotFoundException e) {
			System.out.println(e.getMessage());
		}
		list.sort();
		String stringList[] = new String[list.getSize()];
		for (int i = 0; i < stringList.length; i++)
			stringList[i] = list.printSingle(i);
		
		birdList = new JList(stringList);
		birdList.setVisibleRowCount(6);
		JScrollPane birdListScrollPane = new JScrollPane(birdList);
		listPanel.add(label);
		listPanel.add(birdListScrollPane);
	}
	
	public void buildButtonPanel() {
		buttonPanel = new JPanel();
		revButton = new JButton("Reverse Order");
		revButton.addActionListener(new ButtonListener());
		buttonPanel.add(revButton);
	}
	
	class ButtonListener implements ActionListener {

		@Override
		public void actionPerformed(ActionEvent e) {
			BirdList list = new BirdList();
			try {
				Scanner input1 = new Scanner(new File("birds1.txt"));
				Scanner input2 = new Scanner(new File("birds2.txt"));
				while (input1.hasNext()) //Populate list
					list.insert(input1.nextLine());
				while (input2.hasNext()) //Remove non-indigenous birds
					list.remove(input2.nextLine());
			}
			catch(FileNotFoundException ex) {
				System.out.println(ex.getMessage());
			}
			list.sortRev();
			String stringList[] = new String[list.getSize()];
			for (int i = 0; i < stringList.length; i++)
				stringList[i] = list.printSingle(i);
			birdList.setListData(stringList);
		}
		
	}

	public static void main(String[] args) {
		new BirdListGUI();
	}
}