/* File: AddNodesDialog.java
 * Author: Jason Gookins
 * Description: This class creates the popup dialog for adding multiple nodes to the network at once.
 */

import java.awt.Dimension;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ArrayList;
import javax.swing.DefaultListModel;
import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextField;
import javax.swing.ListSelectionModel;
import javax.swing.ScrollPaneConstants;

public class AddNodesDialog extends JDialog implements ActionListener
{
	/************************
	 ** Instance Variables **
	 ************************/

	private ArrayList<Node> nodes;
	private JTextField newNodeTextField;
	private JButton addButton;
	private JButton removeButton;
	private DefaultListModel newNodesList;
	private JList newNodesListDisplay;
	private JButton okayButton;
	private JButton cancelButton;
	private String[] newNodes;



	/**********************
	 ** Main Constructor **
	 **********************/

	public AddNodesDialog(JFrame parent, ArrayList<Node> nodes)
	{
		super(parent, "Add New Nodes", true);

		this.nodes = nodes;

		setDefaultCloseOperation(DO_NOTHING_ON_CLOSE);
		setPreferredSize(new Dimension(300, 300));
		setResizable(false);

		JPanel dialogPanel = new JPanel(null);

		JLabel newNodeLabel = new JLabel("New Node:", JLabel.CENTER);
		newNodeLabel.setBounds(10, 45, 125, 20);
		dialogPanel.add(newNodeLabel);

		newNodeTextField = new JTextField();
		newNodeTextField.setBounds(15, 70, 125, 20);
		dialogPanel.add(newNodeTextField);

		addButton = new JButton("Add >>");
		addButton.setBounds(20, 100, 115, 30);
		addButton.addActionListener(this);
		dialogPanel.add(addButton);

		removeButton = new JButton("Remove <<");
		removeButton.setBounds(20, 140, 115, 30);
		removeButton.addActionListener(this);
		dialogPanel.add(removeButton);

		newNodesList = new DefaultListModel();

		newNodesListDisplay = new JList(newNodesList);
		newNodesListDisplay.setSelectionMode(ListSelectionModel.SINGLE_INTERVAL_SELECTION);
		JScrollPane listScrollPane = new JScrollPane(newNodesListDisplay, ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS, ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
		listScrollPane.setBounds(150, 15, 135, 200);
		dialogPanel.add(listScrollPane);

		okayButton = new JButton("Okay");
		okayButton.setBounds(60, 230, 75, 25);
		okayButton.addActionListener(this);
		dialogPanel.add(okayButton);

		cancelButton = new JButton("Cancel");
		cancelButton.setBounds(165, 230, 75, 25);
		cancelButton.addActionListener(this);
		dialogPanel.add(cancelButton);

		setContentPane(dialogPanel);

		pack();
		newNodeTextField.requestFocusInWindow();
		setLocationRelativeTo(parent);
		setVisible(true);
	}



	/***************
	 ** Accessors **
	 ***************/

	public String[] getNewNodes()
	{
		return this.newNodes;
	}



	/*******************
	 ** Action Events **
	 *******************/

	public void actionPerformed(ActionEvent evt)
	{
		if (evt.getSource().equals(addButton))
		{
			String newNodeName = newNodeTextField.getText();

			if (newNodeName != null)
			{
				if (newNodeName.length() > 0)
				{
					boolean nameExists = false;

					for (Node node : nodes)
					{
						if (newNodeName.compareToIgnoreCase(node.getName()) == 0)
						{
							nameExists = true;

							break;
						}
					}

					if (!nameExists)
					{
						for (int i = 0; i < newNodesList.size(); i++)
						{
							String nodeName = newNodesList.get(i).toString();

							if (newNodeName.equals(nodeName))
							{
								nameExists = true;

								break;
							}
						}

						if (!nameExists)
						{
							newNodesList.addElement(newNodeTextField.getText());
							newNodeTextField.setText(null);
						}
						else
						{
							JOptionPane.showMessageDialog(this, "You are already trying to add a node with that name. Please try again.", "Node Name Error", JOptionPane.ERROR_MESSAGE);
						}
					}
					else
					{
						JOptionPane.showMessageDialog(this, "A node with that name already exists. Please try again.", "Node Name Error", JOptionPane.ERROR_MESSAGE);
					}
				}
			}

			newNodeTextField.requestFocus();
			newNodeTextField.selectAll();
		}
		else if (evt.getSource().equals(removeButton))
		{
			int[] indices = newNodesListDisplay.getSelectedIndices();

			if (indices.length > 0)
			{
				newNodesList.removeRange(indices[0], indices[indices.length - 1]);
			}
		}
		else if (evt.getSource().equals(okayButton))
		{
			newNodes = new String[newNodesList.size()];

			for (int i = 0; i < newNodesList.size(); i++)
			{
				newNodes[i] = newNodesList.get(i).toString();
			}

			dispose();
		}
		else if (evt.getSource().equals(cancelButton))
		{
			dispose();
		}
	}
}