/*
 * File    : TOTorrentFactory.java
 * Created : 5 Oct. 2003
 * By      : Parg 
 * 
 * Azureus - a Java Bittorrent client
 *
 * This program 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 2 of the License.
 *
 * This program 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 ( see the LICENSE file ).
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package com.frostwire.torrent;

import java.io.File;
import java.io.InputStream;
import java.net.URI;
import java.util.Map;

public class TOTorrentFactory {
    public static final long TO_DEFAULT_FIXED_PIECE_SIZE = 256 * 1024;

    public static final long TO_DEFAULT_VARIABLE_PIECE_SIZE_MIN = 32 * 1024;
    public static final long TO_DEFAULT_VARIABLE_PIECE_SIZE_MAX = 2 * 1024 * 1024;

    public static final long TO_DEFAULT_VARIABLE_PIECE_NUM_LOWER = 1024;
    public static final long TO_DEFAULT_VARIABLE_PIECE_NUM_UPPER = 2048;

    public static final long[] STANDARD_PIECE_SIZES = { 32 * 1024, 48 * 1024, 64 * 1024, 96 * 1024, 128 * 1024, 192 * 1024, 256 * 1024, 384 * 1024, 512 * 1024, 768 * 1024, 1024 * 1024, 1536 * 1024, 2 * 1024 * 1024, 3 * 1024 * 1024, 4 * 1024 * 1024 };

    // deserialisation methods

    /**
     * WARNING - take care if you use this that the data you're creating the torrent from doesn't contain
     * unwanted attributes in it (e.g. "torrent filename"). You should almost definitely be using 
     * TorrentUtils.deserialiseFromBEncodedInputStream
     * @param is
     * @return
     * @throws TOTorrentException
     */

    public static TOTorrent deserialiseFromBEncodedInputStream(InputStream is) throws TOTorrentException {
        return new TOTorrentDeserialiseImpl(is);
    }

    public static TOTorrent deserialiseFromBEncodedByteArray(byte[] bytes) throws TOTorrentException {
        return new TOTorrentDeserialiseImpl(bytes);
    }

    public static TOTorrent deserialiseFromMap(Map<String, Object> data) throws TOTorrentException {
        return new TOTorrentDeserialiseImpl(data);
    }

    // construction methods: fixed piece size

    public static TOTorrentCreator createFromFileOrDirWithFixedPieceLength(File file, URI announce_url)

    throws TOTorrentException {
        return (createFromFileOrDirWithFixedPieceLength(file, announce_url, false, TO_DEFAULT_FIXED_PIECE_SIZE));
    }

    public static TOTorrentCreator createFromFileOrDirWithFixedPieceLength(File file, URI announce_url, boolean add_hashes)

    throws TOTorrentException {
        return (createFromFileOrDirWithFixedPieceLength(file, announce_url, add_hashes, TO_DEFAULT_FIXED_PIECE_SIZE));
    }

    public static TOTorrentCreator createFromFileOrDirWithFixedPieceLength(File file, URI announce_url, long piece_length)

    throws TOTorrentException {
        return (createFromFileOrDirWithFixedPieceLength(file, announce_url, false, piece_length));
    }

    public static TOTorrentCreator createFromFileOrDirWithFixedPieceLength(File file, URI announce_url, boolean add_hashes, long piece_length)

    throws TOTorrentException {
        return (new TOTorrentCreatorImpl(file, announce_url, add_hashes, piece_length));
    }

    // construction methods: variable piece size	

    public static TOTorrentCreator createFromFileOrDirWithComputedPieceLength(File file, URI announce_url)

    throws TOTorrentException {
        return (createFromFileOrDirWithComputedPieceLength(file, announce_url, false));
    }

    public static TOTorrentCreator createFromFileOrDirWithComputedPieceLength(File file, URI announce_url, boolean add_hashes)

    throws TOTorrentException {
        return (createFromFileOrDirWithComputedPieceLength(file, announce_url, add_hashes, TO_DEFAULT_VARIABLE_PIECE_SIZE_MIN, TO_DEFAULT_VARIABLE_PIECE_SIZE_MAX, TO_DEFAULT_VARIABLE_PIECE_NUM_LOWER, TO_DEFAULT_VARIABLE_PIECE_NUM_UPPER));

    }

    public static TOTorrentCreator createFromFileOrDirWithComputedPieceLength(File file, URI announce_url, long piece_min_size, long piece_max_size, long piece_num_lower, long piece_num_upper)

    throws TOTorrentException {
        return (createFromFileOrDirWithComputedPieceLength(file, announce_url, false, piece_min_size, piece_max_size, piece_num_lower, piece_num_upper));

    }

    public static TOTorrentCreator createFromFileOrDirWithComputedPieceLength(File file, URI announce_url, boolean add_hashes, long piece_min_size, long piece_max_size, long piece_num_lower, long piece_num_upper)

    throws TOTorrentException {
        return new TOTorrentCreatorImpl(file, announce_url, add_hashes, 0, piece_min_size, piece_max_size, piece_num_lower, piece_num_upper, null);

    }

    public static long getComputedPieceSize(long data_size) {
        return (TOTorrentCreateImpl.getComputedPieceSize(data_size, TO_DEFAULT_VARIABLE_PIECE_SIZE_MIN, TO_DEFAULT_VARIABLE_PIECE_SIZE_MAX, TO_DEFAULT_VARIABLE_PIECE_NUM_LOWER, TO_DEFAULT_VARIABLE_PIECE_NUM_UPPER));
    }

    public static long getPieceCount(long total_size, long piece_size) {
        return (TOTorrentCreateImpl.getPieceCount(total_size, piece_size));
    }
}