package com.cy;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Frame;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JTextField;
/*
 * 这个程序为计算java代码中有多少个程序行normalLines，注释行commentLines，空行whiteLines
 */
public class CodeCounter extends JFrame{
	static long normalLines=0;
	static long commentLines=0;
	static long whiteLines=0;
	static String path; 
	static File file;
	final JFileChooser chooser=new JFileChooser();    //文件选择器
	JDialog dialog=new JDialog();     //对话框
	public static JTextField textField;
	public static JTextField textField_1;
	public static JTextField textField_2;
	public static JButton button;
	private JTextField textField_3;

	public CodeCounter() {
		getContentPane().setLayout(null);



		JLabel label = new JLabel("normalLines:");
		label.setForeground(Color.BLUE);
		label.setBounds(62, 83, 95, 21);
		getContentPane().add(label);


		JLabel lblCommentlines = new JLabel("commentLines:");
		lblCommentlines.setForeground(Color.GREEN);
		lblCommentlines.setBounds(62, 137, 95, 21);
		getContentPane().add(lblCommentlines);

		JLabel lblWhitelines = new JLabel("whiteLines:");
		lblWhitelines.setForeground(Color.ORANGE);
		lblWhitelines.setBounds(74, 196, 75, 21);
		getContentPane().add(lblWhitelines);

		JLabel lbljava = new JLabel("this is a java file code counter");
		lbljava.setForeground(Color.RED);
		lbljava.setBounds(74, 10, 234, 50);
		getContentPane().add(lbljava);

		textField = new JTextField();
		textField.setEditable(false);
		textField.setBounds(167, 83, 79, 21);
		getContentPane().add(textField);
		textField.setColumns(10);

		textField_1 = new JTextField();
		textField_1.setEditable(false);
		textField_1.setBounds(167, 137, 79, 21);
		getContentPane().add(textField_1);
		textField_1.setColumns(10);

		textField_2 = new JTextField();
		textField_2.setEditable(false);
		textField_2.setBounds(167, 196, 79, 21);
		getContentPane().add(textField_2);
		textField_2.setColumns(10);

		textField.setText("0");
		textField_1.setText("0");
		textField_2.setText("0");

		button = new JButton("start");
		button.setEnabled(false);
		button.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				if(file.getName().matches(".*\\.java$")){
					parse(file);
					textField.setText(normalLines+"");
					textField_1.setText(commentLines+"");
					textField_2.setText(whiteLines+"");
					normalLines=0;
					commentLines=0;
					whiteLines=0;
				}
				else{
					JOptionPane.showMessageDialog(null, "您选择的不是java文件");
				}
				/*System.out.println("normalLines:" +normalLines);
				System.out.println("commentLines:" +commentLines);
				System.out.println("whiteLines:" +whiteLines);*/



			}
		});
		button.setBounds(49, 354, 93, 23);
		getContentPane().add(button);

		JButton button_1 = new JButton("exit");
		button_1.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				System.exit(0);
			}
		});
		button_1.setBounds(189, 354, 93, 23);
		getContentPane().add(button_1);

		JButton button_2 = new JButton("choose a file");
		button_2.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				String title=chooser.getDialogTitle();  // JFileChooser 的标题栏中所显示的字符串
				if(title == null)
					chooser.getUI().getDialogTitle(chooser);//获得实现此组件 L&F 的 UI 对象。

				dialog = new JDialog((Frame)null, title, false);
				dialog.getContentPane().setLayout(new BorderLayout());
				dialog.getContentPane().add(chooser, BorderLayout.CENTER);
				dialog.setTitle("请选择要显示的文件");
				dialog.pack();
				//dialog.setLocationRelativeTo(CodeCounter.this); 
				dialog.setVisible(true);

				button.setEnabled(true);		
			}
		});

		chooser.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				String state = (String)e.getActionCommand();
				// 确定按钮被激活
				if(state.equals(JFileChooser.APPROVE_SELECTION)) {
					file = chooser.getSelectedFile();
					//System.out.println(file.getAbsoluteFile());
					/*JOptionPane.showMessageDialog(null, file.getPath());*/
					textField_3.setText(file.getPath());
				}

				dialog.setVisible(false);
			}
		});

		button_2.setForeground(Color.RED);
		button_2.setBounds(101, 249, 145, 23);
		getContentPane().add(button_2);

		textField_3 = new JTextField();
		textField_3.setBounds(10, 294, 326, 21);
		getContentPane().add(textField_3);
		textField_3.setColumns(10);


		this.setTitle("Java CodeCounter");
		this.setSize(352,429);
		this.setLocation(100,100);
		this.setVisible(true);
		this.setResizable(false);
		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	}
	public static void main(String[] args){
		new CodeCounter();

		/*//选择文件夹
		File f=new File("E:\\temp\\Snake\\src\\");
		File[] codeFiles=f.listFiles();
		//以.java结尾的文件
		for(File child:codeFiles){
			if(child.getName().matches(".*\\.java$")){         
				parse(child);
			}
		}
		 */
	}

	private static void parse(File f) {
		BufferedReader br=null;
		boolean comment=false;
		try {
			br=new BufferedReader(new FileReader(f));
			String line="";
			while((line=br.readLine())!=null){
				line=line.trim();
				if(line.matches("^[\\s&&[^\\n]]*")){      //正则表达式
					whiteLines++;
				}else if(line.startsWith("/*")&&!line.endsWith("*/")){
					commentLines++;
					comment=true;
				}else if(line.startsWith("/*")&&line.endsWith("*/")){
					commentLines++;
				}
				else if(true==comment){
					commentLines++;
					if(line.endsWith("*/")){
						comment=false;
					}
				}else if(line.startsWith("//")){
					commentLines++;
				}else {
					normalLines++;
				}
			}
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		} finally{
			if(br!=null){
				try{
					br.close();
					br=null;
				}catch(IOException e){
					e.printStackTrace();
				}
			}
		}
	}
}