/*
 * [Unquilt.java]
 *
 * Summary: unravel a quilt table into a table of a single column or column group/pair.
 *
 * Copyright: (c) 1998-2017 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 1998-01-01
 */
package com.mindprod.reorg;

import java.io.IOException;

import static java.lang.System.*;

/**
 * unravel a quilt table into a table of a single column or column group/pair.
 * <p/>
 * Convert an Quilted table back to a single column.
 * Must manually strip stuff ahead and after table.
 * Must manually strip <TABLE> </TABLE>
 * Must manually strip <TH> </TH>
 * no fancy <tr ALIGN> <a <br> etc. Just <tr> <td> in upper or lower case.
 * does not deal with rowspan or colspan.
 * It can't handle any grammatical errors in your HTML.
 * Does not resort.
 * Input from E:\temp\in.html
 * Output to E:\temp\out.html all tags in lower case.
 *
 * @author Roedy Green, Canadian Mind Products
 * @version 1.0 1998-01-01
 * @since 1998-01-01
 */
public final class Unquilt extends Common
    {
    private static final int FIRST_COPYRIGHT_YEAR = 2003;

    /**
     * undisplayed copyright
     */
    @SuppressWarnings( { "UnusedDeclaration" } )
    private static final String EMBEDDED_COPYRIGHT =
            "Copyright: (c) 2003-2017 Roedy Green, Canadian Mind Products, http://mindprod.com";

    /**
     * main
     *
     * @param args [0] byrows to unquilt by rows. No ability do undo double column quilts yet. byrows is not implemented
     *             either.
     *
     * @throws java.io.IOException if any problem reading or writing the html
     */
    public static void main( String[] args ) throws IOException
        {
        if ( args.length > 0 && args[ 0 ].equalsIgnoreCase( "byrows" ) )
            {
            out.println( "byrows is not yet implemented" );
            System.exit( 1 );
            }
        // get entire table into a string.
        final String[][] matrix = getMatrix( IN_FILENAME );
        final int rows = rows( matrix );
        final int cols = cols( matrix );
        displayRowAndColCounts( "quilted input", rows, cols );
        trimMatrix( matrix );
        // New result shape
        final int nrows = rows * cols;
        final int ncols = 1;
        displayRowAndColCounts( "unquilted output", nrows, ncols );
        // create new matrix with 1 columns.
        String[][] grid = new String[ nrows ][ ncols ];
        int targetRow = 0;
        for ( int col = 0; col < cols; col++ )
            {
            for ( int row = 0; row < rows; row++ )
                {
                grid[ targetRow++ ][ 0 ] = matrix[ row ][ col ];
                } // end for
            } // end for
        writeMatrix( grid, OUT_FILENAME );
        } // end main
    } // end Unquilt