/*
 * [StripRearranger.java]
 *
 * Summary: Strip all comments inserted by the IntelliJ Rearranger.
 *
 * Copyright: (c) 2009-2017 Roedy Green, Canadian Mind Products, http://mindprod.com
 *
 * Licence: This software may be copied and used freely for any purpose but military.
 *          http://mindprod.com/contact/nonmil.html
 *
 * Requires: JDK 1.8+
 *
 * Created with: JetBrains IntelliJ IDEA IDE http://www.jetbrains.com/idea/
 *
 * Version History:
 *  1.0 2009-04-25 initial version
 */
package com.mindprod.repair;

import com.mindprod.commandline.CommandLine;
import com.mindprod.filter.AllButSVNDirectoriesFilter;
import com.mindprod.filter.ExtensionListFilter;
import com.mindprod.hunkio.HunkIO;

import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import static java.lang.System.*;

/**
 * Strip all comments inserted by the IntelliJ Rearranger.
 *
 * @author Roedy Green, Canadian Mind Products
 * @version 1.0 2009-04-25 initial version
 * @since 2009-04-25
 */
public class StripRearranger
    {
    /**
     * pattern to recognise comments that the Rearranger inserted
     */
    private static final Pattern
            REARRANGER_COMMENT_FINDER = Pattern.compile(
            "//\\s+[\\-]+\\s+(?:"
            + "|CANONICAL METHODS"
            + "|CONSTANTS"
            + "|CONSTRUCTORS"
            + "|FIELDS"
            + "|GETTER / SETTER METHODS"
            + "|INNER CLASSES"
            + "|Interface \\p{Alpha}+"
            + "|INTERFACE METHODS"
            + "|main\\(\\) method"
            + "|OTHER METHODS"
            + "|PUBLIC INSTANCE METHODS"
            + "|PUBLIC STATIC METHODS"
            + "|STATIC METHODS"
            + ")\\s+[\\-]+\\r\\n"
    );

    /**
     * Remove Rearranger comments from Java source code
     *
     * @param args list of dirs to process, -s means subsequent dirs are recursed.
     *
     * @throws IOException if cannot read source code files.
     */
    public static void main( String[] args ) throws IOException
        {
        // get files to process from command line.
        out.println( "Gathering Java files to strip comments inserted by the Rearranger..." );
        CommandLine wantedFiles = new CommandLine( args,
                new AllButSVNDirectoriesFilter(),
                new ExtensionListFilter( "java" ) );
        for ( File fileBeingProcessed : wantedFiles )
            {
            try
                {
                final String big = HunkIO.readEntireFile( fileBeingProcessed );
                // do not correct to StringBuilder
                final StringBuffer modified = new StringBuffer( big.length() );
                final Matcher m = REARRANGER_COMMENT_FINDER.matcher( big );
                while ( m.find() )
                    {
                    // remove comment found
                    m.appendReplacement( modified, "\r\n" ); // no need for Matcher.quoteReplacement
                    }
                m.appendTail( modified );
                final String modifiedBig = modified.toString();
                if ( !modifiedBig.equals( big ) )
                    {
                    final File tempFile = HunkIO.createTempFile( "temp_", ".tmp", fileBeingProcessed );
                    FileWriter emit = new FileWriter( tempFile );
                    emit.write( modifiedBig );
                    emit.close();
                    HunkIO.deleteAndRename( tempFile, fileBeingProcessed );
                    }
                }
            catch ( IOException e )
                {
                e.printStackTrace( err );
                err.println();
                }
            } // end for to process each file
        out.println( "done" );
        }
    }