/*
 * [CountParms.java]
 *
 * Summary: Count number of parms in code for a given method to verify signature changes.
 *
 * Copyright: (c) 2016-2017 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 2016-03-19 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.IOException;

import static java.lang.System.*;

/**
 * Count number of parms in code for a given method to verify signature changes.
 *
 * @author Roedy Green, Canadian Mind Products
 * @version 1.0 2016-03-19 initial version
 * @since 2008
 */
public class CountParms
    {
    private static final int FIRST_COPYRIGHT_YEAR = 2016;

    /**
     * undisplayed copyright notice
     */
    @SuppressWarnings( { "UnusedDeclaration" } )
    private static final String EMBEDDED_COPYRIGHT =
            "Copyright: (c) 2016-2017 Roedy Green, Canadian Mind Products, http://mindprod.com";

    @SuppressWarnings( { "UnusedDeclaration" } )
    private static final String RELEASE_DATE = "2016-03-19";

    /**
     * embedded version string.
     */
    @SuppressWarnings( { "UnusedDeclaration" } )
    private static final String VERSION_STRING = "1.0";

    private static void scan( File fileBeingProcessed, String method ) throws IOException
        {
        final String big = HunkIO.readEntireFile( fileBeingProcessed );
        int start = 0;
        int whereFound = 0;
        final int end = big.length();
        method += '(';
        while ( ( whereFound = big.indexOf( method, start ) ) >= 0 )
            {
            int comma = 0;
            innerloop:
            for ( int i = whereFound; i < end; i++ )
                {
                final char c = big.charAt( i );
                switch ( c )
                    {
                    case ',':
                        comma++;
                        break;
                    case ';':
                        start = i + 1;
                        break innerloop;
                    default:
                        break;
                    }
                }
            // number of parms found
            out.println( ( comma + 1 ) + " " + fileBeingProcessed.toString() );
            } // end while
        }

    /**
     * @param args name of method to look for
     */
    public static void main( String[] args )
        {
        // get files to process java command line.
        out.println( "Gathering html files to scan for calls..." );
        CommandLine wantedFiles = new CommandLine(
                new String[] { "-s", "-q", "E:/intellij/mp/j8/src/com/mindprod/" },
                new AllButSVNDirectoriesFilter(),
                new ExtensionListFilter( "java" ) );
        if ( args.length != 1 )
            {
            err.println( "CountParms: missing name of method on command line" );
            System.exit( 2 );
            }
        final String method = args[ 0 ];
        for ( File fileBeingProcessed : wantedFiles )
            {
            try
                {
                scan( fileBeingProcessed, method );
                }
            catch ( IOException e )
                {
                e.printStackTrace( err );
                err.println();
                }
            } // end for to process each file
        out.println( "done" );
        }
    }