/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/**
 * Copyright (c) 2013-2016, Regents of the University of California.
 *
 * This file is part of ChronoShare, a decentralized file sharing application over NDN.
 *
 * ChronoShare 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.
 *
 * ChronoShare 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 copies of the GNU General Public License along with
 * ChronoShare, e.g., in COPYING.md file.  If not, see <http://www.gnu.org/licenses/>.
 *
 * See AUTHORS.md for complete list of ChronoShare authors and contributors.
 */
//
// reply.cpp
// ~~~~~~~~~
//
// Copyright (c) 2003-2012 Christopher M. Kohlhoff (chris at kohlhoff dot com)
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//

#include "reply.hpp"
#include <boost/lexical_cast.hpp>
#include <string>

namespace http {
namespace server {

namespace status_strings {

const std::string ok = "HTTP/1.0 200 OK\r\n";
const std::string created = "HTTP/1.0 201 Created\r\n";
const std::string accepted = "HTTP/1.0 202 Accepted\r\n";
const std::string no_content = "HTTP/1.0 204 No Content\r\n";
const std::string multiple_choices = "HTTP/1.0 300 Multiple Choices\r\n";
const std::string moved_permanently = "HTTP/1.0 301 Moved Permanently\r\n";
const std::string moved_temporarily = "HTTP/1.0 302 Moved Temporarily\r\n";
const std::string not_modified = "HTTP/1.0 304 Not Modified\r\n";
const std::string bad_request = "HTTP/1.0 400 Bad Request\r\n";
const std::string unauthorized = "HTTP/1.0 401 Unauthorized\r\n";
const std::string forbidden = "HTTP/1.0 403 Forbidden\r\n";
const std::string not_found = "HTTP/1.0 404 Not Found\r\n";
const std::string internal_server_error = "HTTP/1.0 500 Internal Server Error\r\n";
const std::string not_implemented = "HTTP/1.0 501 Not Implemented\r\n";
const std::string bad_gateway = "HTTP/1.0 502 Bad Gateway\r\n";
const std::string service_unavailable = "HTTP/1.0 503 Service Unavailable\r\n";

boost::asio::const_buffer
to_buffer(reply::status_type status)
{
  switch (status) {
    case reply::ok:
      return boost::asio::buffer(ok);
    case reply::created:
      return boost::asio::buffer(created);
    case reply::accepted:
      return boost::asio::buffer(accepted);
    case reply::no_content:
      return boost::asio::buffer(no_content);
    case reply::multiple_choices:
      return boost::asio::buffer(multiple_choices);
    case reply::moved_permanently:
      return boost::asio::buffer(moved_permanently);
    case reply::moved_temporarily:
      return boost::asio::buffer(moved_temporarily);
    case reply::not_modified:
      return boost::asio::buffer(not_modified);
    case reply::bad_request:
      return boost::asio::buffer(bad_request);
    case reply::unauthorized:
      return boost::asio::buffer(unauthorized);
    case reply::forbidden:
      return boost::asio::buffer(forbidden);
    case reply::not_found:
      return boost::asio::buffer(not_found);
    case reply::internal_server_error:
      return boost::asio::buffer(internal_server_error);
    case reply::not_implemented:
      return boost::asio::buffer(not_implemented);
    case reply::bad_gateway:
      return boost::asio::buffer(bad_gateway);
    case reply::service_unavailable:
      return boost::asio::buffer(service_unavailable);
    default:
      return boost::asio::buffer(internal_server_error);
  }
}

} // namespace status_strings

namespace misc_strings {

const char name_value_separator[] = {':', ' '};
const char crlf[] = {'\r', '\n'};

} // namespace misc_strings

std::vector<boost::asio::const_buffer>
reply::to_buffers()
{
  std::vector<boost::asio::const_buffer> buffers;
  buffers.push_back(status_strings::to_buffer(status));
  for (std::size_t i = 0; i < headers.size(); ++i) {
    header& h = headers[i];
    buffers.push_back(boost::asio::buffer(h.name));
    buffers.push_back(boost::asio::buffer(misc_strings::name_value_separator));
    buffers.push_back(boost::asio::buffer(h.value));
    buffers.push_back(boost::asio::buffer(misc_strings::crlf));
  }
  buffers.push_back(boost::asio::buffer(misc_strings::crlf));
  buffers.push_back(boost::asio::buffer(content));
  return buffers;
}

namespace stock_replies {

const char ok[] = "";
const char created[] = "<html>"
                       "<head><title>Created</title></head>"
                       "<body><h1>201 Created</h1></body>"
                       "</html>";
const char accepted[] = "<html>"
                        "<head><title>Accepted</title></head>"
                        "<body><h1>202 Accepted</h1></body>"
                        "</html>";
const char no_content[] = "<html>"
                          "<head><title>No Content</title></head>"
                          "<body><h1>204 Content</h1></body>"
                          "</html>";
const char multiple_choices[] = "<html>"
                                "<head><title>Multiple Choices</title></head>"
                                "<body><h1>300 Multiple Choices</h1></body>"
                                "</html>";
const char moved_permanently[] = "<html>"
                                 "<head><title>Moved Permanently</title></head>"
                                 "<body><h1>301 Moved Permanently</h1></body>"
                                 "</html>";
const char moved_temporarily[] = "<html>"
                                 "<head><title>Moved Temporarily</title></head>"
                                 "<body><h1>302 Moved Temporarily</h1></body>"
                                 "</html>";
const char not_modified[] = "<html>"
                            "<head><title>Not Modified</title></head>"
                            "<body><h1>304 Not Modified</h1></body>"
                            "</html>";
const char bad_request[] = "<html>"
                           "<head><title>Bad Request</title></head>"
                           "<body><h1>400 Bad Request</h1></body>"
                           "</html>";
const char unauthorized[] = "<html>"
                            "<head><title>Unauthorized</title></head>"
                            "<body><h1>401 Unauthorized</h1></body>"
                            "</html>";
const char forbidden[] = "<html>"
                         "<head><title>Forbidden</title></head>"
                         "<body><h1>403 Forbidden</h1></body>"
                         "</html>";
const char not_found[] = "<html>"
                         "<head><title>Not Found</title></head>"
                         "<body><h1>404 Not Found</h1></body>"
                         "</html>";
const char internal_server_error[] = "<html>"
                                     "<head><title>Internal Server Error</title></head>"
                                     "<body><h1>500 Internal Server Error</h1></body>"
                                     "</html>";
const char not_implemented[] = "<html>"
                               "<head><title>Not Implemented</title></head>"
                               "<body><h1>501 Not Implemented</h1></body>"
                               "</html>";
const char bad_gateway[] = "<html>"
                           "<head><title>Bad Gateway</title></head>"
                           "<body><h1>502 Bad Gateway</h1></body>"
                           "</html>";
const char service_unavailable[] = "<html>"
                                   "<head><title>Service Unavailable</title></head>"
                                   "<body><h1>503 Service Unavailable</h1></body>"
                                   "</html>";

std::string
to_string(reply::status_type status)
{
  switch (status) {
    case reply::ok:
      return ok;
    case reply::created:
      return created;
    case reply::accepted:
      return accepted;
    case reply::no_content:
      return no_content;
    case reply::multiple_choices:
      return multiple_choices;
    case reply::moved_permanently:
      return moved_permanently;
    case reply::moved_temporarily:
      return moved_temporarily;
    case reply::not_modified:
      return not_modified;
    case reply::bad_request:
      return bad_request;
    case reply::unauthorized:
      return unauthorized;
    case reply::forbidden:
      return forbidden;
    case reply::not_found:
      return not_found;
    case reply::internal_server_error:
      return internal_server_error;
    case reply::not_implemented:
      return not_implemented;
    case reply::bad_gateway:
      return bad_gateway;
    case reply::service_unavailable:
      return service_unavailable;
    default:
      return internal_server_error;
  }
}

} // namespace stock_replies

reply
reply::stock_reply(reply::status_type status)
{
  reply rep;
  rep.status = status;
  rep.content = stock_replies::to_string(status);
  rep.headers.resize(2);
  rep.headers[0].name = "Content-Length";
  rep.headers[0].value = boost::lexical_cast<std::string>(rep.content.size());
  rep.headers[1].name = "Content-Type";
  rep.headers[1].value = "text/html";
  return rep;
}

} // namespace server
} // namespace http