// Copyright (c) 2014-2019, The Monero Project
// Copyright (c)      2018, The Loki Project
// 
// All rights reserved.
// 
// Redistribution and use in source and binary forms, with or without modification, are
// permitted provided that the following conditions are met:
// 
// 1. Redistributions of source code must retain the above copyright notice, this list of
//    conditions and the following disclaimer.
// 
// 2. Redistributions in binary form must reproduce the above copyright notice, this list
//    of conditions and the following disclaimer in the documentation and/or other
//    materials provided with the distribution.
// 
// 3. Neither the name of the copyright holder nor the names of its contributors may be
//    used to endorse or promote products derived from this software without specific
//    prior written permission.
// 
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#pragma once

#include "common/scoped_message_writer.h"
#include "common/util.h"
#include "daemonizer/posix_fork.h"

#include <boost/filesystem/operations.hpp>
#include <boost/filesystem/path.hpp>

namespace daemonizer
{
  namespace
  {
    const command_line::arg_descriptor<bool> arg_detach = {
      "detach"
    , "Run as daemon"
    };
    const command_line::arg_descriptor<std::string> arg_pidfile = {
      "pidfile"
    , "File path to write the daemon's PID to (optional, requires --detach)"
    };
    const command_line::arg_descriptor<bool> arg_non_interactive = {
      "non-interactive"
    , "Run non-interactive"
    };
  }

  inline void init_options(
      boost::program_options::options_description & hidden_options
    , boost::program_options::options_description & normal_options
    )
  {
    command_line::add_arg(normal_options, arg_detach);
    command_line::add_arg(normal_options, arg_pidfile);
    command_line::add_arg(normal_options, arg_non_interactive);
  }

  inline boost::filesystem::path get_default_data_dir()
  {
    return boost::filesystem::absolute(tools::get_default_data_dir());
  }

  inline boost::filesystem::path get_relative_path_base(
      boost::program_options::variables_map const & vm
    )
  {
    return boost::filesystem::current_path();
  }

  template <typename T_executor>
  inline bool daemonize(
      int argc, char const * argv[]
    , T_executor && executor // universal ref
    , boost::program_options::variables_map const & vm
    )
  {
    if (command_line::has_arg(vm, arg_detach))
    {
      tools::success_msg_writer() << "Forking to background...";
      std::string pidfile;
      if (command_line::has_arg(vm, arg_pidfile))
      {
        pidfile = command_line::get_arg(vm, arg_pidfile);
      }
      posix::fork(pidfile);
      auto daemon = executor.create_daemon(vm);
      return daemon.run();
    }
    else if (command_line::has_arg(vm, arg_non_interactive))
    {
      return executor.run_non_interactive(vm);
    }
    else
    {
      //LOG_PRINT_L0("Loki '" << LOKI_RELEASE_NAME << "' (v" << LOKI_VERSION_FULL);
      return executor.run_interactive(vm);
    }
  }
}
