import objectdraw.*;

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

import java.io.*;

import javax.swing.*;


/*
 * A simple Text Editor.  It has two features: it can
 * load a file and it can save a file.
 */
//@width 800
//@height 600
public class CountWords extends Controller implements ActionListener {
    private JButton loadButton;
    private JButton countButton;
    private JTextArea textArea;
    private JLabel count;
    private JTextField wordField;

    public void begin() {
        this.resize(800, 600);

        JPanel p = new JPanel();
        loadButton = new JButton("Load File");
        p.add(loadButton);

        countButton = new JButton("Count");
        p.add(countButton);

        p.add(new JLabel("Word: "));
        wordField = new JTextField(12);
        p.add(wordField);

        p.add(count = new JLabel("Count: 0"));
        
        textArea = new JTextArea("Note: Load File will not work if running in a browser");
        textArea.setFont(new Font("Times", Font.PLAIN, 24));
        getContentPane().add(new JScrollPane(textArea), BorderLayout.CENTER);
        getContentPane().add(p, BorderLayout.NORTH);

        loadButton.addActionListener(this);
        countButton.addActionListener(this);

        validate();
    }

    private int countWords(String text, String word) {
        int count = 0;
        int pos = text.indexOf(word, 0);

        while (pos > -1) {
            count++;
            pos = text.indexOf(word, pos + word.length());
        }

        return count;
    }

    // Listener for button clicks that loads the
    // specified web pages and puts it in the
    // browser component.
    public void actionPerformed(ActionEvent event) {
        if (event.getSource() == loadButton) {
            loadFile();
        } else {
            String text = textArea.getText();
            String word = wordField.getText();
            int num = countWords(text, word);
            count.setText("Count: " + num);
        }
    }

    private void loadFile() {
        textArea.setText(""); // clear window

        JFileChooser chooser = new JFileChooser();

        if (chooser.showOpenDialog(this) == JFileChooser.APPROVE_OPTION) {
            File file = chooser.getSelectedFile();

            try {
                // read in the file, appending each line
                // to the text window
                BufferedReader input = new BufferedReader(new FileReader(file));

                String line = input.readLine();

                while (line != null) {
                    textArea.append(line + "\n");
                    line = input.readLine();
                }

                input.close();
            } catch (IOException e) {
                JOptionPane.showMessageDialog(this, "Error: " + e);
            }
        }
    }
}