// docker-finance | modern accounting for the power-user
//
// Copyright (C) 2021-2024 Aaron Fiore (Founder, Evergreen Crypto LLC)
//
// 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 3 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, see <https://www.gnu.org/licenses/>.

//! \file
//! \author Aaron Fiore (Founder, Evergreen Crypto LLC)
//! \note File intended to be loaded into ROOT.cern framework / Cling interpreter
//! \since docker-finance 1.0.0

#ifndef CONTAINER_SRC_ROOT_MACRO_COMMON_UTILITY_HH_
#define CONTAINER_SRC_ROOT_MACRO_COMMON_UTILITY_HH_

#include <ctime>
#include <initializer_list>
#include <iostream>
#include <string>
#include <vector>

//! \namespace docker_finance
//! \since docker-finance 1.0.0
namespace docker_finance
{
//! \namespace docker_finance::macro
//! \brief ROOT macros
//! \since docker-finance 1.0.0
namespace macro
{
//! \namespace docker_finance::macro::common
//! \brief Shared ROOT macro-related functionality
//! \since docker-finance 1.0.0
namespace common
{
//! \brief Wrapper to ROOT Cling commands
//! \ingroup cpp_macro_impl
//! \since docker-finance 1.0.0
class Command final
{
 public:
  Command() = default;
  ~Command() = default;

  Command(const Command&) = default;
  Command& operator=(const Command&) = default;

  Command(Command&&) = default;
  Command& operator=(Command&&) = default;

 private:
  static void cmd_handler(const std::initializer_list<std::string>& command)
  {
    for (const auto& cmd : command)
      {
        std::cout << "Interpreting: '" << cmd << "'" << std::endl;
        gInterpreter->ProcessLine(cmd.c_str());
      }
  }

 public:
  //! \brief Load given file path
  static void load(const std::string& path)
  {
    std::string cmd{".L ./" + path};
    Command::cmd_handler({cmd});
  }

  //! \brief Load given file paths
  static void load(const std::initializer_list<std::string>& commands)
  {
    for (const auto& cmd : commands)
      Command::load(cmd);
  }
};

//! \brief Get ROOT environment variable
//! \param var ROOT variable
//! \note ROOT environment variables include shell (and shell caller) environment
//! \since docker-finance 1.0.0
std::string get_env(const std::string& var)
{
  const auto* env = gSystem->Getenv(var.c_str());
  if (!env)
    throw std::runtime_error(
        std::string{var + " is not set or is unavailable"}.c_str());
  return std::string{env};
}

//! \brief Make current timestamp
//! \return timestamp in "yyyy-mm-ddThh:mm:ssZ" format
//! \since docker-finance 1.0.0
std::string make_timestamp()
{
  const std::time_t t{std::time({})};
  std::vector<char> time(std::size("yyyy-mm-ddThh:mm:ssZ"));
  std::strftime(time.data(), time.size(), "%FT%TZ", std::gmtime(&t));
  return std::string{time.data()};
}
}  // namespace common

//! \brief Load file by path
//! \ingroup cpp_macro
//! \details
//!   Example:
//!     <br>&emsp; root [0] docker_finance::macro::load("test/test.C")<br>
//!
//!   Will load:
//!     <br>&emsp; root/macro/test/test.C<br>
//!
//! \note  Parent directory is `root/macro`
void load(const std::string& path)
{
  common::Command::load(path);
}

//! \brief Wrapper to load files by list of paths
//! \ingroup cpp_macro
//! \details
//!   Example:
//!     <br>&emsp; root [0] docker_finance::macro::load({"test/test.C", "../src/hash.hh"})<br>
//!
//!   Will load:
//!     <br>&emsp; root/macro/test/test.C and root/src/hash.hh<br>
//!
//! \note  Parent directory is `root/macro`
void load(const std::initializer_list<std::string>& paths)
{
  for (const auto& path : paths)
    common::Command::load(path);
}
}  // namespace macro
}  // namespace docker_finance

#endif  // CONTAINER_SRC_ROOT_MACRO_COMMON_UTILITY_HH_

// # vim: sw=2 sts=2 si ai et