/*
This file is part of jpcsp.

Jpcsp is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

Jpcsp is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with Jpcsp.  If not, see <http://www.gnu.org/licenses/>.
 */
package jpcsp.filesystems.umdiso.iso9660;

import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import jpcsp.filesystems.umdiso.UmdIsoFile;
import jpcsp.filesystems.umdiso.UmdIsoReader;

/**
 *
 * @author gigaherz
 */
public class Iso9660Directory {
    private final List<Iso9660File> files;

    public Iso9660Directory(UmdIsoReader r, int directorySector, long directorySize) throws IOException {
        // parse directory sector
        UmdIsoFile dataStream = new UmdIsoFile(r, directorySector, directorySize, null, null);

        files = new ArrayList<Iso9660File>();

        byte[] b = new byte[256];

        while (directorySize >= 1) {
            int entryLength = dataStream.read();

            // This is assuming that the padding bytes are always filled with 0's.
            if (entryLength == 0) {
            	directorySize--;
                continue;
            }

            directorySize -= entryLength;
            int readLength = dataStream.read(b, 0, entryLength - 1);
            Iso9660File file = new Iso9660File(b, readLength, r.hasJolietExtension());

            files.add(file);
        }

        dataStream.close();
    }

    public Iso9660File getEntryByIndex(int index) throws ArrayIndexOutOfBoundsException {
        return files.get(index);
    }

    public int getFileIndex(String fileName) throws FileNotFoundException {
    	int i = 0;
    	for (Iso9660File file : files) {
            if (file.getFileName().equalsIgnoreCase(fileName)) {
                return i;
            }
            i++;
    	}

        throw new FileNotFoundException(String.format("File '%s' not found in directory.", fileName));
    }

    public String[] getFileList() throws FileNotFoundException {
        String[] list = new String[files.size()];
        int i = 0;
        for (Iso9660File file : files) {
        	list[i] = file.getFileName();
        	i++;
        }
        return list;
    }
}