package lab8;

import java.awt.EventQueue;
import java.awt.FileDialog;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.BorderLayout;

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JButton;
import javax.swing.JTextArea;
import javax.swing.JScrollPane;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;

public class ns {

	private JFrame frame;
	private JTextArea tArea;
	private StringBuilder currentText = null;

	/**
	 * Launch the application.
	 */
	public static void main(String[] args) {
		EventQueue.invokeLater(new Runnable() {
			public void run() {
				try {
					ns window = new ns();
					window.frame.setVisible(true);
				} catch (Exception e) {
					e.printStackTrace();
				}
			}
		});
	}

	/**
	 * Create the application.
	 */
	public ns() {
		initialize();
	}

	/**
	 * Initialize the contents of the frame.
	 */
	private void initialize() {
		frame = new JFrame();
		frame.setBounds(100, 100, 450, 300);
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

		JPanel panel = new JPanel();
		frame.getContentPane().add(panel, BorderLayout.NORTH);

		JButton btnLoadText = new JButton("Текст");
		btnLoadText.addMouseListener(new MouseAdapter() {
			@Override
			public void mouseClicked(MouseEvent arg0) {
				FileDialog fd = new FileDialog(new JFrame(), "Текст");
				fd.show();//Кликабельность кнопки
				currentText = loadText(fd.getDirectory() + fd.getFile());
				tArea.setText(currentText.toString());
			}
		});
		panel.add(btnLoadText);

		JButton btnChange = new JButton("Обработать");
		btnChange.addMouseListener(new MouseAdapter() {
			@Override
			public void mouseClicked(MouseEvent e) {
				change();
			}
		});

		panel.add(btnChange);

		tArea = new JTextArea();

		JScrollPane scrollPane = new JScrollPane(tArea);
		frame.getContentPane().add(scrollPane, BorderLayout.CENTER);
	}

	private StringBuilder loadText(String path) {
		StringBuilder res = new StringBuilder();
			try (BufferedReader br = new BufferedReader(new FileReader(path))) {
				while (br.ready()) {
					res.append(br.readLine() + System.lineSeparator());
				}
			} catch (IOException ex) {

			}
			return res;
	}

	private void change() {
		if (currentText != null) {
			StringBuilder newText = new StringBuilder();
			StringBuilder word = new StringBuilder();
			char ch;
			boolean inWord = false;
			for (int i = 0; i < currentText.length(); i++) {
				ch = currentText.charAt(i);
				if (Character.isAlphabetic(ch)) {
					if (!inWord) {
						inWord = true;
						word.setLength(0);
					}

					word.append(ch);
				} else {
					if (check(word)) {
						newText.append(toLowerCase(word));
					} else {
						newText.append(word);
					}
					newText.append(ch);
					word.setLength(0);
					inWord = false;
				}
			}
			tArea.setText(newText.toString());
		}
	}

	private boolean check(StringBuilder word) {
		if (word.length() == 0) {
			return false;
		}
		char lastCh = word.charAt(0);
		for (int i = 1; i < word.length(); i++) {
			if (lastCh == word.charAt(i)) {
				return true;
			}
			lastCh = word.charAt(i);
		}
		return false;
	}

	private StringBuilder toLowerCase(StringBuilder word) {
		StringBuilder res = new StringBuilder();
		for (int i = 0; i < word.length(); i++) {
			res.append(Character.toLowerCase(word.charAt(i)));
		}
		return res;
	}
}