/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
 * Copyright (c) 2016-2025, Regents of the University of California,
 *                          Colorado State University,
 *                          University Pierre & Marie Curie, Sorbonne University.
 *
 * This file is part of ndn-tools (Named Data Networking Essential Tools).
 * See AUTHORS.md for complete list of ndn-tools authors and contributors.
 *
 * ndn-tools 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.
 *
 * ndn-tools 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
 * ndn-tools, e.g., in COPYING.md file.  If not, see <http://www.gnu.org/licenses/>.
 *
 * See AUTHORS.md for complete list of ndn-cxx authors and contributors.
 *
 * @author Wentao Shang
 * @author Steve DiBenedetto
 * @author Andrea Tosatto
 * @author Davide Pesavento
 * @author Klaus Schneider
 */

#include "core/version.hpp"
#include "producer.hpp"

#include <boost/program_options/options_description.hpp>
#include <boost/program_options/parsers.hpp>
#include <boost/program_options/variables_map.hpp>

#include <iostream>

namespace ndn::serve {

namespace po = boost::program_options;

static void
usage(std::ostream& os, std::string_view programName, const po::options_description& desc)
{
  os << "Usage: " << programName << " [options] ndn:/name\n"
     << "\n"
     << "Publish data under the specified prefix.\n"
     << "Note: this tool expects data from the standard input.\n"
     << "\n"
     << desc;
}

static int
main(int argc, char* argv[])
{
  const std::string programName(argv[0]);

  Producer::Options opts;
  std::string prefix, nameConv, signingStr;

  po::options_description visibleDesc("Options");
  visibleDesc.add_options()
    ("help,h",      "print this help message and exit")
    ("freshness,f", po::value<time::milliseconds::rep>()->default_value(opts.freshnessPeriod.count()),
                    "FreshnessPeriod of the published Data packets, in milliseconds")
    ("size,s",      po::value<size_t>(&opts.maxSegmentSize)->default_value(opts.maxSegmentSize),
                    "maximum chunk size, in bytes")
    ("naming-convention,N",  po::value<std::string>(&nameConv),
                             "encoding convention to use for name components, either 'marker' or 'typed'")
    ("signing-info,S",       po::value<std::string>(&signingStr), "see 'man ndnserve' for usage")
    ("print-data-version,p", po::bool_switch(&opts.wantShowVersion),
                             "print Data version to the standard output")
    ("quiet,q",     po::bool_switch(&opts.isQuiet), "turn off all non-error output")
    ("verbose,v",   po::bool_switch(&opts.isVerbose), "turn on verbose output (per Interest information)")
    ("version,V",   "print program version and exit")
    ;

  po::options_description hiddenDesc;
  hiddenDesc.add_options()
    ("name", po::value<std::string>(&prefix), "NDN name for the served content");

  po::options_description optDesc;
  optDesc.add(visibleDesc).add(hiddenDesc);

  po::positional_options_description p;
  p.add("name", -1);

  po::variables_map vm;
  try {
    po::store(po::command_line_parser(argc, argv).options(optDesc).positional(p).run(), vm);
    po::notify(vm);
  }
  catch (const po::error& e) {
    std::cerr << "ERROR: " << e.what() << "\n";
    return 2;
  }
  catch (const boost::bad_any_cast& e) {
    std::cerr << "ERROR: " << e.what() << "\n";
    return 2;
  }

  if (vm.count("help") > 0) {
    usage(std::cout, programName, visibleDesc);
    return 0;
  }

  if (vm.count("version") > 0) {
    std::cout << "ndnserve " << tools::VERSION << "\n";
    return 0;
  }

  if (prefix.empty()) {
    usage(std::cerr, programName, visibleDesc);
    return 2;
  }

  if (nameConv == "marker" || nameConv == "m" || nameConv == "1") {
    name::setConventionEncoding(name::Convention::MARKER);
  }
  else if (nameConv == "typed" || nameConv == "t" || nameConv == "2") {
    name::setConventionEncoding(name::Convention::TYPED);
  }
  else if (!nameConv.empty()) {
    std::cerr << "ERROR: '" << nameConv << "' is not a valid naming convention\n";
    return 2;
  }

  opts.freshnessPeriod = time::milliseconds(vm["freshness"].as<time::milliseconds::rep>());
  if (opts.freshnessPeriod < 0_ms) {
    std::cerr << "ERROR: --freshness cannot be negative\n";
    return 2;
  }

  if (opts.maxSegmentSize < 1 || opts.maxSegmentSize > MAX_NDN_PACKET_SIZE) {
    std::cerr << "ERROR: --size must be between 1 and " << MAX_NDN_PACKET_SIZE << "\n";
    return 2;
  }

  try {
    opts.signingInfo = security::SigningInfo(signingStr);
  }
  catch (const std::invalid_argument& e) {
    std::cerr << "ERROR: " << e.what() << "\n";
    return 2;
  }

  if (opts.isQuiet && opts.isVerbose) {
    std::cerr << "ERROR: cannot be quiet and verbose at the same time\n";
    return 2;
  }

  try {
    Face face;
    KeyChain keyChain;
    Producer producer(prefix, face, keyChain, std::cin, opts);
    producer.run();
  }
  catch (const std::exception& e) {
    std::cerr << "ERROR: " << e.what() << "\n";
    return 1;
  }

  return 0;
}

} // namespace ndn::serve

int
main(int argc, char* argv[])
{
  return ndn::serve::main(argc, argv);
}