// MIT License
// Copyright (c) 2026 by Peter Siegmund (mars3142)
// 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.

#include "storage/storage.h"

#include <fstream>

namespace storage {

std::expected<std::vector<uint8_t>, StorageError> Storage::readFile(
    const std::string &path) const {
  std::ifstream file(path, std::ios::binary | std::ios::ate);
  if (!file) {
    return std::unexpected(StorageError::FileNotFound);
  }

  const std::streamsize size = file.tellg();
  if (size < 0) {
    return std::unexpected(StorageError::ReadError);
  }
  file.seekg(0, std::ios::beg);

  std::vector<uint8_t> data(static_cast<size_t>(size));
  if (!file.read(reinterpret_cast<char *>(data.data()), size)) {
    return std::unexpected(StorageError::ReadError);
  }
  return data;
}

std::expected<void, StorageError> Storage::writeFile(
    const std::string &path,
    const std::vector<uint8_t> &data) const {
  std::ofstream file(path, std::ios::binary);
  if (!file) {
    return std::unexpected(StorageError::WriteError);
  }
  file.write(reinterpret_cast<const char *>(data.data()), data.size());
  if (!file.good()) {
    return std::unexpected(StorageError::WriteError);
  }
  return {};
}

} // namespace storage
