#pragma once

#include <cstdint>
#include <filesystem>
#include <string>
#include <string_view>

#include "nf7.hh"


namespace nf7 {

class NativeFile final : public nf7::Context {
 public:
  enum Flag : uint8_t {
    kRead   = 1 << 0,
    kWrite  = 1 << 1,
    kExLock = 1 << 2,
  };
  using Flags = uint8_t;

  NativeFile() = delete;
  NativeFile(Env& env, File::Id id, const std::filesystem::path& path, Flags flags) noexcept :
      Context(env, id), path_(path), flags_(flags) {
  }
  NativeFile(const NativeFile&) = delete;
  NativeFile(NativeFile&&) = delete;
  NativeFile& operator=(const NativeFile&) = delete;
  NativeFile& operator=(NativeFile&&) = delete;

  void CleanUp() noexcept override;
  void Abort() noexcept override;

  void Lock();
  void Unlock();
  size_t Read(size_t offset, uint8_t* buf, size_t size);
  size_t Write(size_t offset, const uint8_t* buf, size_t size);
  size_t Truncate(size_t size);

  size_t GetMemoryUsage() const noexcept override;
  std::string GetDescription() const noexcept override;

 private:
  const std::filesystem::path path_;
  const Flags flags_;

  uint64_t handle_;
};

}  // namespace nf7