#pragma once

#include <array>
#include <string_view>

#include <openssl/evp.h>
#include <openssl/hmac.h>

namespace rublon {

// +1 for \0
inline std::array< char, 64 + 1 > signData(std::string_view data, std::string_view secretKey) {
    std::array< char, 64 + 1 > xRublon;
    std::array< unsigned char, EVP_MAX_MD_SIZE > md;
    unsigned int md_len{};

    HMAC(EVP_sha256(), secretKey.data(), secretKey.size(), ( unsigned const char * ) data.data(), data.size(), md.data(), &md_len);

    for(unsigned int i = 0; i < md_len; i++)
        sprintf(&xRublon[i * 2], "%02x", ( unsigned int ) md[i]);

    return xRublon;
}

} // namespace rublon