/*
 * Copyright (c) 2015, grossmann
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * * Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * * Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * * Neither the name of the jo-widgets.org nor the
 *   names of its contributors may be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL jo-widgets.org BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGE.
 */
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.util.Arrays;

public final class PandocPreProcessor {

    private PandocPreProcessor() {}

    public static void main(final String[] args) throws Exception {

        if (args == null || args.length != 2) {
            //CHECKSTYLE:OFF
            System.out.println("Usage: DocBookPostProcessor <source folder> <destination folder>");
            //CHECKSTYLE:ON
            return;
        }

        final File destination = new File(args[1]);
        if (!destination.exists()) {
            destination.mkdirs();
        }

        final File pdfFile = new File(args[1] + File.separatorChar + "pdf_in.md");
        if (pdfFile.exists()) {
            pdfFile.delete();
        }

        final File docbookFile = new File(args[1] + File.separatorChar + "docbook_in.md");
        if (docbookFile.exists()) {
            docbookFile.delete();
        }

        final FileWriter pdfWriter = new FileWriter(pdfFile);
        final FileWriter docbookWriter = new FileWriter(docbookFile);

        final File sourceFolder = new File(args[0]);
        final String[] filenames = sourceFolder.list();
        Arrays.sort(filenames);

        for (final String filename : filenames) {
			if (filename.endsWith("todo")){
				continue;
			}
		
            final BufferedReader reader = new BufferedReader(new FileReader(new File(args[0] + File.separatorChar + filename)));

            boolean codeStarted = false;
            String line = "";
            while (line != null) {
                line = reader.readLine();
                if (line == null) {
                    break;
                }

                if (line.contains(("~~~"))) {
                    codeStarted = !codeStarted;
                }

                if (codeStarted && line.endsWith("~~~")) {
                    pdfWriter.write(line.replace("~~~", "~~~{.java}"));
                    codeStarted = true;
                }
                else {
                    pdfWriter.write(line);
                }

                pdfWriter.write("\n");

                docbookWriter.write(line);
                docbookWriter.write("\n");
            }

            reader.close();

            pdfWriter.write("\n");
            docbookWriter.write("\n");
        }

        pdfWriter.close();
        docbookWriter.close();
    }
}