/**
 * @file bindings/cli/get_printable_param.hpp
 * @author Ryan Curtin
 *
 * Print the parameter to stdout, using template metaprogramming to enforce
 * different behavior for different parameter types.
 *
 * mlpack is free software; you may redistribute it and/or modify it under the
 * terms of the 3-clause BSD license.  You should have received a copy of the
 * 3-clause BSD license along with mlpack.  If not, see
 * http://www.opensource.org/licenses/BSD-3-Clause for more information.
 */
#ifndef MLPACK_BINDINGS_CLI_GET_PRINTABLE_PARAM_HPP
#define MLPACK_BINDINGS_CLI_GET_PRINTABLE_PARAM_HPP

#include <mlpack/prereqs.hpp>
#include <mlpack/core/util/param_data.hpp>
#include <mlpack/core/util/is_std_vector.hpp>

namespace mlpack {
namespace bindings {
namespace cli {

/**
 * Print an option.
 */
template<typename T>
std::string GetPrintableParam(
    util::ParamData& data,
    const typename boost::disable_if<arma::is_arma_type<T>>::type* = 0,
    const typename boost::disable_if<util::IsStdVector<T>>::type* = 0,
    const typename boost::disable_if<data::HasSerialize<T>>::type* = 0,
    const typename boost::disable_if<std::is_same<T,
        std::tuple<data::DatasetInfo, arma::mat>>>::type* = 0);

/**
 * Print a vector option, with spaces between it.
 */
template<typename T>
std::string GetPrintableParam(
    util::ParamData& data,
    const typename std::enable_if<util::IsStdVector<T>::value>::type* = 0);

/**
 * Print a matrix/tuple option (this just prints the filename).
 */
template<typename T>
std::string GetPrintableParam(
    util::ParamData& data,
    const typename std::enable_if<arma::is_arma_type<T>::value ||
                                  std::is_same<T,
        std::tuple<data::DatasetInfo, arma::mat>>::value>::type* = 0);

/**
 * Print a model option (this just prints the filename).
 */
template<typename T>
std::string GetPrintableParam(
    util::ParamData& data,
    const typename boost::disable_if<arma::is_arma_type<T>>::type* = 0,
    const typename boost::enable_if<data::HasSerialize<T>>::type* = 0);

/**
 * Print an option into a std::string.  This should print a short, one-line
 * representation of the object.  The string will be stored in the output
 * pointer.
 */
template<typename T>
void GetPrintableParam(util::ParamData& data,
                       const void* /* input */,
                       void* output)
{
  *((std::string*) output) =
      GetPrintableParam<typename std::remove_pointer<T>::type>(data);
}

} // namespace cli
} // namespace bindings
} // namespace mlpack

// Include implementation.
#include "get_printable_param_impl.hpp"

#endif
