/**
  * Calculates the lines of code/comments for Java projects.
  * Run in the current folder.
  * If there are no source code files in the current folder, it will go through subfolders
  * Considers multi-line comments, empty lines etc.
  * @author Alex Rass
  * www.itbsllc.com
  */

import java.io.*;

class CodeTell {
  private int codeLines = 0, commentLines = 0, fileCount = 0, folderCount = 0, characterCount = 0;
  long totalFileLength = 0;

  private void calcFile (File file) {
    BufferedReader freader;
    String fname, line;
    boolean insideComment;

    fname = file.getName();
    if ( fname==null ) {
      System.out.println("Somehow the filename was null!");
    } else if ( fname.toLowerCase().endsWith(".java") || fname.toLowerCase().endsWith(".idl") || fname.toLowerCase().endsWith(".rb") ) {
      totalFileLength+=file.length();
      fileCount++;
      try {
        freader = new BufferedReader (new FileReader (file));
        System.out.println("    "+fname);
        line = freader.readLine();
        if ( line!=null )
          line = line.trim();
        insideComment = false;
        int temp;
        while ( line!=null ) {
          characterCount+=line.length();
          if ( line.length() == 0 ) {
            // ignore those
          } else if ( insideComment ) {
            if ( (temp = line.indexOf("*/")) >= 0 ) {
              insideComment = false;
              if ( line.length() > temp )
                codeLines++;
              if ( temp > 2 )
                commentLines++;
            }
          } else {
            if ( !line.startsWith("//") )
              codeLines++;
            if ( line.startsWith("/*") )
              insideComment = true;
            if ( line.indexOf("//") >= 0 )
              commentLines++;
          }

          line = freader.readLine();
          if ( line!=null ) {
            line = line.trim();
          }
        }
      } catch ( FileNotFoundException e ) {
        System.out.println("File not found: " + fname);
      } catch ( Exception e ) {
        System.out.println(e);
        e.printStackTrace();
      }

    } // if

  }
  public static void main (String[] args) {
    (new CodeTell()).start();
  } // main

  public void start() {
    File folder = new File(".");

    examineList(folder.listFiles());

    System.out.println("Folders:\t"+folderCount);
    System.out.println("Files:\t\t"+fileCount);
    System.out.println("Code:\t\t"+codeLines+" lines");
    System.out.println("Comments:\t"+commentLines+" lines");
    System.out.println("Combined:\t"+characterCount+" characters");
    System.out.println("File Size:\t"+totalFileLength+" bytes");
    System.out.println("");
  }

  protected void examineList(File[] files) {
    // do files first
    for ( int i=0; i < files.length; i++ ) { // go through all files
      if (! files[i].isDirectory() )
        calcFile (files[i]);
    } 
    // do folders after - looks better when they are grouped separately.
    for ( int i=0; i < files.length; i++ ) {// go through all folders.
      if ( files[i].isDirectory() ) {
        System.out.println(files[i].getName());
        folderCount++;
        examineList (files[i].listFiles());
      }
    }
  } //examineList

} // class CodeTell