/* <!-- copyright */
/*
 * aria2 - The high speed download utility
 *
 * Copyright (C) 2006 Tatsuhiro Tsujikawa
 *
 * 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, or
 * (at your option) any later version.
 *
 * 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.
 *
 * 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * In addition, as a special exception, the copyright holders give
 * permission to link the code of portions of this program with the
 * OpenSSL library under certain conditions as described in each
 * individual source file, and distribute linked combinations
 * including the two.
 * You must obey the GNU General Public License in all respects
 * for all of the code used other than OpenSSL.  If you modify
 * file(s) with this exception, you may extend this exception to your
 * version of the file(s), but you are not obligated to do so.  If you
 * do not wish to do so, delete this exception statement from your
 * version.  If you delete this exception statement from all source
 * files in the program, then also delete it here.
 */
/* copyright --> */
#include "common.h"
#include "SharedHandle.h"
#include "a2io.h"
#include "FeatureConfig.h"
#ifdef ENABLE_MESSAGE_DIGEST
# include "messageDigest.h"
#endif // ENABLE_MESSAGE_DIGEST
#include "TagContainer.h"
#include "HelpItem.h"
#include "HelpItemFactory.h"
#include "help_tags.h"
#include "prefs.h"
#include "StringFormat.h"
#include <iostream>
#include <iterator>
#include <algorithm>

namespace aria2 {

void showVersion() {
  std::cout << PACKAGE << _(" version ") << PACKAGE_VERSION << "\n"
	    << "Copyright (C) 2006, 2008 Tatsuhiro Tsujikawa" << "\n"
	    << "\n"
	    <<
      "This program is distributed in the hope that it will be useful,\n"
      "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
      "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\n"
      "GNU General Public License for more details.\n"
	    << "\n"
	    << "** Configuration **" << "\n"
	    << "Enabled Features: "
	    << FeatureConfig::getInstance()->featureSummary() << "\n"
#ifdef ENABLE_MESSAGE_DIGEST
	    << "Hash Algorithms: "
	    << MessageDigestContext::getSupportedAlgoString() << "\n"
#endif // ENABLE_MESSAGE_DIGEST
	    << "\n"
	    << StringFormat(_("Report bugs to %s"), "<tujikawa at users dot sourceforge dot net>")
	    << std::endl;
}

void showUsage(const std::string& category, const Option* option) {
  std::cout << StringFormat(_("Usage: %s [OPTIONS] [URL | TORRENT_FILE | METALINK_FILE]..."), PACKAGE_NAME) << "\n"
	    << "\n";

  SharedHandle<TagContainer> tc = HelpItemFactory::createHelpItems(option);
  std::deque<SharedHandle<TaggedItem> > items =
    category == V_ALL ? tc->getAllItems() : tc->search(category);
  if(items.size() > 0) {
    if(category == V_ALL) {
      std::cout << _("Printing all options.");
    } else {
      std::cout << StringFormat(_("Printing options tagged with '%s'."), category.c_str());
      std::cout << "\n";
      SharedHandle<HelpItem> helpItem
	(dynamic_pointer_cast<HelpItem>(tc->nameMatch("help")));
      std::cout << StringFormat(_("See -h option to know other command-line options(%s)."),
				helpItem->getAvailableValues().c_str());
    }
    std::cout << "\n"
	      << _("Options:") << "\n";

    std::copy(items.begin(), items.end(), std::ostream_iterator<SharedHandle<TaggedItem> >(std::cout, "\n"));

  } else {
    std::deque<SharedHandle<TaggedItem> > items = tc->nameMatchForward(category);
    if(items.size() > 0) {
      std::cout << StringFormat(_("Printing options whose name starts with '%s'."), category.c_str())
		<< "\n"
		<< _("Options:") << "\n";
      std::copy(items.begin(), items.end(), std::ostream_iterator<SharedHandle<TaggedItem> >(std::cout, "\n"));
    } else {
      std::cout << StringFormat(_("No help category or option name matching with '%s'."), category.c_str())
		<< "\n" << tc->nameMatch("help") << "\n";
    }
  }
  if(category == TAG_BASIC) {
    std::cout << "\n"
	      << "URL, TORRENT_FILE, METALINK_FILE:" << "\n"
	      << _(" You can specify multiple URLs. Unless you specify -Z option, all URLs must\n"
		   " point to the same file or downloading will fail.") << "\n"
	      << _(" You can also specify arbitrary number of torrent files and metalink files\n"
		   " stored in a local drive. Please note that they are always treated as a\n"
		   " separate download.") << "\n"

	      << "\n"
	      << _(" You can specify both torrent file with -T option and URLs. By doing this,\n"
		   " download a file from both torrent swarm and http/ftp server at the same time,\n"
		   " while the data from http/ftp are uploaded to the torrent swarm. Note that\n"
		   " only single file torrent can be integrated with http/ftp.") << "\n"
	      << "\n"
	      << _(" Make sure that URL is quoted with single(\') or double(\") quotation if it\n"
		   " contains \"&\" or any characters that have special meaning in shell.") << "\n";
  }
  std::cout << "\n"
	    << _("Refer to man page for more information.") << std::endl;
}

} // namespace aria2