/*
  Copyright <2018-2024> <scott.e.graves@protonmail.com>

  Permission is hereby granted, free of charge, to any person obtaining a copy
  of this software and associated documentation files (the "Software"), to deal
  in the Software without restriction, including without limitation the rights
  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  copies of the Software, and to permit persons to whom the Software is
  furnished to do so, subject to the following conditions:

  The above copyright notice and this permission notice shall be included in all
  copies or substantial portions of the Software.

  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  SOFTWARE.
*/
#ifndef REPERTORY_INCLUDE_UTILS_HASH_HPP_
#define REPERTORY_INCLUDE_UTILS_HASH_HPP_
#if defined(PROJECT_ENABLE_LIBSODIUM)

#include "utils/config.hpp"

namespace repertory::utils::encryption {
using hash_256_t = std::array<unsigned char, 32U>;
using hash_384_t = std::array<unsigned char, 48U>;
using hash_512_t = std::array<unsigned char, 64U>;

[[nodiscard]] auto create_hash_blake2b_256(std::string_view data) -> hash_256_t;

[[nodiscard]] auto
create_hash_blake2b_256(std::wstring_view data) -> hash_256_t;

[[nodiscard]] auto create_hash_blake2b_384(std::string_view data) -> hash_384_t;

[[nodiscard]] auto
create_hash_blake2b_384(std::wstring_view data) -> hash_384_t;

[[nodiscard]] auto create_hash_blake2b_512(std::string_view data) -> hash_512_t;

[[nodiscard]] auto
create_hash_blake2b_512(std::wstring_view data) -> hash_512_t;

template <typename char_t, typename hash_t>
[[nodiscard]] auto
create_hash_blake2b_t(std::basic_string_view<char_t> data) -> hash_t;

template <typename hash_t>
[[nodiscard]] auto create_hash_blake2b_t(const data_buffer &data) -> hash_t;

template <typename char_t, typename hash_t>
[[nodiscard]] auto create_hash_blake2b_t(
    const std::vector<std::basic_string<char_t>> &data) -> hash_t;

template <typename arr_t, std::size_t arr_size>
[[nodiscard]] auto
create_hash_blake2b_t(const std::vector<std::array<arr_t, arr_size>> &data)
    -> std::array<arr_t, arr_size>;

[[nodiscard]] auto create_hash_sha256(std::string_view data) -> hash_256_t;

[[nodiscard]] auto create_hash_sha256(std::wstring_view data) -> hash_256_t;

[[nodiscard]] auto create_hash_sha512(std::string_view data) -> hash_512_t;

[[nodiscard]] auto create_hash_sha512(std::wstring_view data) -> hash_512_t;

template <typename char_t>
[[nodiscard]] auto
create_hash_sha256_t(std::basic_string_view<char_t> data) -> hash_256_t;

template <typename char_t>
[[nodiscard]] auto create_hash_sha512_t(std::basic_string_view<char_t> data)
    -> repertory::utils::encryption::hash_512_t;

template <typename hash_t>
auto create_hash_blake2b_t(const data_buffer &data) -> hash_t {
  hash_t hash{};

  crypto_generichash_blake2b_state state{};
  auto res = crypto_generichash_blake2b_init(&state, nullptr, 0U, hash.size());
  if (res != 0) {
    throw std::runtime_error("failed to initialize blake2b|" +
                             std::to_string(res));
  }

  res = crypto_generichash_blake2b_update(
      &state, reinterpret_cast<const unsigned char *>(data.data()),
      data.size() * sizeof(data_buffer::value_type));
  if (res != 0) {
    throw std::runtime_error("failed to update blake2b|" + std::to_string(res));
  }

  res = crypto_generichash_blake2b_final(&state, hash.data(), hash.size());
  if (res != 0) {
    throw std::runtime_error("failed to finalize blake2b|" +
                             std::to_string(res));
  }

  return hash;
}

template <typename arr_t, std::size_t arr_size>
auto create_hash_blake2b_t(const std::vector<std::array<arr_t, arr_size>> &data)
    -> std::array<arr_t, arr_size> {
  using hash_t = std::array<arr_t, arr_size>;
  hash_t hash{};

  crypto_generichash_blake2b_state state{};
  auto res = crypto_generichash_blake2b_init(&state, nullptr, 0U, hash.size());
  if (res != 0) {
    throw std::runtime_error("failed to initialize blake2b|" +
                             std::to_string(res));
  }

  for (const auto &item : data) {
    res = crypto_generichash_blake2b_update(
        &state, reinterpret_cast<const unsigned char *>(item.data()),
        item.size());
    if (res != 0) {
      throw std::runtime_error("failed to update blake2b|" +
                               std::to_string(res));
    }
  }

  res = crypto_generichash_blake2b_final(&state, hash.data(), hash.size());
  if (res != 0) {
    throw std::runtime_error("failed to finalize blake2b|" +
                             std::to_string(res));
  }

  return hash;
}

template <typename char_t, typename hash_t>
auto create_hash_blake2b_t(const std::vector<std::basic_string<char_t>> &data)
    -> hash_t {
  hash_t hash{};

  crypto_generichash_blake2b_state state{};
  auto res = crypto_generichash_blake2b_init(&state, nullptr, 0U, hash.size());
  if (res != 0) {
    throw std::runtime_error("failed to initialize blake2b|" +
                             std::to_string(res));
  }

  for (const auto &item : data) {
    res = crypto_generichash_blake2b_update(
        &state, reinterpret_cast<const unsigned char *>(item.data()),
        item.size() * sizeof(char_t));
    if (res != 0) {
      throw std::runtime_error("failed to update blake2b|" +
                               std::to_string(res));
    }
  }

  res = crypto_generichash_blake2b_final(&state, hash.data(), hash.size());
  if (res != 0) {
    throw std::runtime_error("failed to finalize blake2b|" +
                             std::to_string(res));
  }

  return hash;
}

template <typename char_t, typename hash_t>
auto create_hash_blake2b_t(std::basic_string_view<char_t> data) -> hash_t {
  hash_t hash{};

  crypto_generichash_blake2b_state state{};
  auto res = crypto_generichash_blake2b_init(&state, nullptr, 0U, hash.size());
  if (res != 0) {
    throw std::runtime_error("failed to initialize blake2b|" +
                             std::to_string(res));
  }

  res = crypto_generichash_blake2b_update(
      &state, reinterpret_cast<const unsigned char *>(data.data()),
      data.size() * sizeof(char_t));
  if (res != 0) {
    throw std::runtime_error("failed to update blake2b|" + std::to_string(res));
  }

  res = crypto_generichash_blake2b_final(&state, hash.data(), hash.size());
  if (res != 0) {
    throw std::runtime_error("failed to finalize blake2b|" +
                             std::to_string(res));
  }

  return hash;
}

template <typename char_t>
auto create_hash_sha256_t(std::basic_string_view<char_t> data)
    -> repertory::utils::encryption::hash_256_t {
  repertory::utils::encryption::hash_256_t hash{};

  crypto_hash_sha256_state state{};
  auto res = crypto_hash_sha256_init(&state);
  if (res != 0) {
    throw std::runtime_error("failed to initialize sha256|" +
                             std::to_string(res));
  }

  res = crypto_hash_sha256_update(
      &state, reinterpret_cast<const unsigned char *>(data.data()),
      data.size() * sizeof(char_t));
  if (res != 0) {
    throw std::runtime_error("failed to update sha256|" + std::to_string(res));
  }

  res = crypto_hash_sha256_final(&state, hash.data());
  if (res != 0) {
    throw std::runtime_error("failed to finalize sha256|" +
                             std::to_string(res));
  }

  return hash;
}

template <typename char_t>
auto create_hash_sha512_t(std::basic_string_view<char_t> data)
    -> repertory::utils::encryption::hash_512_t {
  repertory::utils::encryption::hash_512_t hash{};

  crypto_hash_sha512_state state{};
  auto res = crypto_hash_sha512_init(&state);
  if (res != 0) {
    throw std::runtime_error("failed to initialize sha512|" +
                             std::to_string(res));
  }

  res = crypto_hash_sha512_update(
      &state, reinterpret_cast<const unsigned char *>(data.data()),
      data.size() * sizeof(char_t));
  if (res != 0) {
    throw std::runtime_error("failed to update sha512|" + std::to_string(res));
  }

  res = crypto_hash_sha512_final(&state, hash.data());
  if (res != 0) {
    throw std::runtime_error("failed to finalize sha512|" +
                             std::to_string(res));
  }

  return hash;
}
} // namespace repertory::utils::encryption

#endif // defined(PROJECT_ENABLE_LIBSODIUM)
#endif // REPERTORY_INCLUDE_UTILS_HASH_HPP_