package countingprogram;

import java.awt.BorderLayout;
import java.awt.Button;
import java.awt.Frame;
import java.awt.Label;
import java.awt.Panel;
import java.awt.TextArea;
import java.awt.TextField;
import java.awt.event.*;
import java.io.*;
import java.util.ArrayList;


public class CodeCounting {

    public static void main(String[] args) {
        new MyCountingFrame("程序代码统计小程序");
    }

}

class MyCountingFrame extends Frame {
    private static final long serialVersionUID = 1L;
    static int sum = 0,realsum = 0,space = 0,note = 0;
    static String b = " ";
    TextArea ta1 ;
    TextField t1;
    Label l1 ;
    
    MyCountingFrame(String s){
        super(s);
        setBounds(300,300,400,400);
        addWindowListener(new WindowAdapter(){
            public void windowClosing(WindowEvent e)  {
                setVisible(false);
                System.exit(0);
            }
        });
        Panel p1 = new Panel();
        l1 = new Label("请输入你要查询的路径");
        t1 = new TextField(20);
        Button b1 = new Button("确定");
        b1.addActionListener(new MyListener());
        p1.add(t1);
        p1.add(l1);
        p1.add(b1);
        ta1 = new TextArea(20,10);
        add(p1,BorderLayout.SOUTH );
        add(ta1,BorderLayout.CENTER );
        setVisible(true);
    }
    
    class MyListener implements ActionListener {
        public void actionPerformed(ActionEvent e){

            ta1.setText(" ");
            String pathname = t1.getText();
            
            if(b.equals(pathname)){
                ta1.append("输入重复");
            }else if(pathname.matches("^.+:\\\\+.*")){
                l1.setText("计算中");
                new Counting (pathname);
                l1.setText("计算完成");
                 b = t1.getText(); 
                t1.setText(" ");
            }else if(pathname.matches("^.+:\\\\.+\\\\$")){
                l1.setText("计算中");
                new Counting (pathname);
                l1.setText("计算完成");
                b = t1.getText();
                t1.setText(" ");    
            }else{
                ta1.setText("输入错误");
                ta1.append("/ 或者\\ 的符号请用 ' \\\\ '来代替");
            }
        }
    }
    
    class Counting {
        String pathname;        
        ArrayList<File> fileall = new ArrayList<File>();

        Counting(String pathname){//构造函数，运行主程序
            this.pathname = pathname;
            launch();
            sum = 0;
            realsum = 0;
            space = 0;
            note = 0;
        }
        
        public void launch(){//检查后缀名并运行搜索程序。
        File  file = new File(pathname);
        /*File [] file1 = file.listFiles();
        for(File c:file1){
            fileall.add(c);
        }*/
         myFileList(file);//递归调用
         
        for(File child:fileall){
            if(child.getName().matches(".*\\.java$")){
                check(child);
            }
        ta1.setText("sum:" + sum + " \n" + "note:" + note + "\n" +  "space:" + space + "\n" +  "realsum:" + realsum);
            }
        }
        
        public void  myFileList(File f){
            File[] file2 = f.listFiles();
            
            for(File kid : file2){
                if(kid.isDirectory()){
                    myFileList(kid);
                }
                fileall.add(kid);
            }
        }
        
        private void check( File child2 ) {//search program is starting...
            BufferedReader br = null;
            String line;
            boolean comment = false;
            
            try{
            br = new BufferedReader(new FileReader(child2));
            while((line =  br.readLine()) != null){
            sum++;
            line = line.trim();
            if(line.matches("[\\s&&[^\\n]]*$")){
                space++;
            }else if(line.startsWith("/*")&& !line.endsWith("*/")){
                note++;
                comment = true;
            }else if(true == comment){
                note++;
                if(line.endsWith("*/")){
                    comment = false;
                }
            }else{
                realsum++;
                }
            }
            }catch (FileNotFoundException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            }finally {

                if(br != null) {
                    try {
                        br.close();
                        br = null;
                    } catch (IOException e) {
                        e.printStackTrace();
                }
            }    
          }
        }
      }
    }