#ifndef I2PD_TOOLS_COMMON_KEY_HPP
#define I2PD_TOOLS_COMMON_KEY_HPP
#include "Identity.h"
#include <algorithm>
#include <cctype>
#include <sstream>
#include <string>


/** @brief returns string representation of a signing key type */
std::string SigTypeToName(uint16_t keytype)
{
  switch(keytype) {
  case i2p::data::SIGNING_KEY_TYPE_DSA_SHA1:
    return "DSA-SHA1";
  case i2p::data::SIGNING_KEY_TYPE_ECDSA_SHA256_P256:
    return "ECDSA-P256";
  case i2p::data::SIGNING_KEY_TYPE_ECDSA_SHA384_P384:
    return "ECDSA-P384";
  case i2p::data::SIGNING_KEY_TYPE_ECDSA_SHA512_P521:
    return "ECDSA-P521";
  case i2p::data::SIGNING_KEY_TYPE_RSA_SHA256_2048:
    return "RSA-2048-SHA256";
  case i2p::data::SIGNING_KEY_TYPE_RSA_SHA384_3072:
    return "RSA-3072-SHA384";
  case i2p::data::SIGNING_KEY_TYPE_RSA_SHA512_4096:
    return "RSA-4096-SHA512";
  case i2p::data::SIGNING_KEY_TYPE_EDDSA_SHA512_ED25519:
    return "ED25519-SHA512";
  default:
    std::stringstream ss;
    ss << "unknown: " << keytype;
    return ss.str();
  }
}

/** @brief make string uppercase */
static void ToUpper(std::string & str)
{
  std::transform(str.begin(), str.end(), str.begin(), [] (uint8_t ch) {
      return std::toupper(ch);
  });
}
/** @brief returns the signing key number given its name or -1 if there is no key of that type */
uint16_t NameToSigType(const std::string & keyname)
{
  if(keyname.size() == 1) return atoi(keyname.c_str());
  
  std::string name = keyname;
  ToUpper(name);
  auto npos = std::string::npos;
  if(name.find("DSA") == 0) return i2p::data::SIGNING_KEY_TYPE_DSA_SHA1;

  if(name.find("P256") != npos) return i2p::data::SIGNING_KEY_TYPE_ECDSA_SHA256_P256;

  if(name.find("P384") != npos) return i2p::data::SIGNING_KEY_TYPE_ECDSA_SHA384_P384;
  
  if(name.find("RSA2048") != npos) return i2p::data::SIGNING_KEY_TYPE_RSA_SHA256_2048;
  if(name.find("RSA-2048") != npos) return i2p::data::SIGNING_KEY_TYPE_RSA_SHA256_2048;
  
  if(name.find("RSA3072") != npos) return i2p::data::SIGNING_KEY_TYPE_RSA_SHA384_3072;
  if(name.find("RSA-3072") != npos) return i2p::data::SIGNING_KEY_TYPE_RSA_SHA384_3072;
  
  if(name.find("RSA4096") != npos) return i2p::data::SIGNING_KEY_TYPE_RSA_SHA512_4096;
  if(name.find("RSA-4096") != npos) return i2p::data::SIGNING_KEY_TYPE_RSA_SHA512_4096;

  if(name.find("ED25519") != npos) return i2p::data::SIGNING_KEY_TYPE_EDDSA_SHA512_ED25519;
  
  return -1;
}

#endif