import java.util.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;

public class SpellChecker extends JFrame {

    JTextArea textArea;
    JTextField stringField;
    JScrollPane scrollPane;

    String[] words;

    public SpellChecker ()
    {
        // Set some parameters of the frame (window) that's brought up.
        this.setSize (600, 600);
        this.setTitle ("Spell checker");
        this.setResizable (true);

        // This is how stuff is put into a frame.
	Container cPane = this.getContentPane();
        textArea = new JTextArea ();
	scrollPane = new JScrollPane (textArea, JScrollPane.VERTICAL_SCROLLBAR_ALWAYS, JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
        cPane.add (scrollPane, BorderLayout.CENTER);
        
        // Make the controls.
        JPanel panel = new JPanel ();
        JLabel label = new JLabel ("Enter string: ");
        panel.add (label);
        stringField = new JTextField (30);
        panel.add (stringField);
        JButton button = new JButton ("Go");
	button.addActionListener (
	  new ActionListener () {
	      public void actionPerformed (ActionEvent a)
	      {
		  handleButtonClick();
	      }
	  }
        );
        panel.add (button);
        cPane.add (panel, BorderLayout.SOUTH);

	// Read in dictionary.
	words = WordTool.getDictionary ();
        
        this.setVisible (true);
    }
    

    String inputStr;


    // When the user clicks the button, this method gets called.
    // It's where we need to respond.

    void handleButtonClick ()
    {
        // Extract the string from the textfield where the user typed the strings.
        inputStr = stringField.getText ();

	String[] matchedWords = findClosestWords (inputStr, words);

	String outputStr = "";

	if (matchedWords ==  null) {
	    outputStr = "No matches found";
	}
	else {
	    for (int i=0; i<matchedWords.length; i++) {
		outputStr += matchedWords[i] + "\n";
	    }
	}

        // Put the output string in the text box.
	String text = textArea.getText ();
	text += outputStr + "\n";
	textArea.setText (text);
    }


    static String[] findClosestWords (String inputWord, String[] words)
    {
	// INSERT YOUR CODE HERE AND IN OTHER METHODS YOU ADD.
    }

    static void test ()
    {
	String inputStr = "asdf";
	String[] words = {"asdf", "aadf", "bsdf", "asdd", "aadd", "asdff", "aasdf", "asd", "assdf"};
	String[] matched = findClosestWords (inputStr, words);
	print (inputStr, matched);
    }

    static void print (String word, String[] matchedWords)
    {
	System.out.println ("Words that matched: " + word);
	for (int i=0; i<matchedWords.length; i++) {
	    System.out.println ("  " + matchedWords[i]);
	}
    }

    public static void main (String[] argv)
    {
	test ();
	//SpellChecker checker = new SpellChecker ();

    }

}