/**
 * \file
 * \author Egor Tensin <Egor.Tensin@gmail.com>
 * \date 2015
 * \copyright This file is licensed under the terms of the MIT License.
 *            See LICENSE.txt for details.
 */

#pragma once

#include <aesnixx/all.hpp>

#include <boost/algorithm/string.hpp>
#include <boost/program_options.hpp>

#include <istream>
#include <string>

static std::istream& operator>>(std::istream& is, aesni::Mode& dest)
{
    static const char* const argument_name = "mode";

    std::string src;
    is >> src;

    if (boost::iequals(src, "ecb"))
        dest = AESNI_ECB;
    else if (boost::iequals(src, "cbc"))
        dest = AESNI_CBC;
    else if (boost::iequals(src, "cfb"))
        dest = AESNI_CFB;
    else if (boost::iequals(src, "ofb"))
        dest = AESNI_OFB;
    else if (boost::iequals(src, "ctr"))
        dest = AESNI_CTR;
    else
    {
        throw boost::program_options::validation_error(
            boost::program_options::validation_error::invalid_option_value,
            argument_name, src);
    }

    return is;
}

static std::istream& operator>>(std::istream& is, aesni::Algorithm& dest)
{
    static const char* const argument_name = "algorithm";

    std::string src;
    is >> src;

    if (boost::iequals(src, "aes128"))
        dest = AESNI_AES128;
    else if (boost::iequals(src, "aes192"))
        dest = AESNI_AES192;
    else if (boost::iequals(src, "aes256"))
        dest = AESNI_AES256;
    else
    {
        throw boost::program_options::validation_error(
            boost::program_options::validation_error::invalid_option_value,
            argument_name, src);
    }

    return is;
}