#ifndef SRC_CRYPTO_CRYPTO_HASH_H_

#define SRC_CRYPTO_CRYPTO_HASH_H_

#if defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS

#include "base_object.h"

#include "crypto/crypto_keys.h"

#include "crypto/crypto_util.h"

#include "env.h"

#include "memory_tracker.h"

#include "v8.h"

namespace node {

namespace crypto {

class Hash final : public BaseObject {

 public:

  static void Initialize(Environment* env, v8::Local<v8::Object> target);

  static void RegisterExternalReferences(ExternalReferenceRegistry* registry);

  void MemoryInfo(MemoryTracker* tracker) const override;

  SET_MEMORY_INFO_NAME(Hash)

  SET_SELF_SIZE(Hash)

  bool HashInit(const EVP_MD* md, v8::Maybe<unsigned int> xof_md_len);

  bool HashUpdate(const char* data, size_t len);

  static void GetHashes(const v8::FunctionCallbackInfo<v8::Value>& args);

  static void GetCachedAliases(const v8::FunctionCallbackInfo<v8::Value>& args);

  static void OneShotDigest(const v8::FunctionCallbackInfo<v8::Value>& args);

 protected:

  static void New(const v8::FunctionCallbackInfo<v8::Value>& args);

  static void HashUpdate(const v8::FunctionCallbackInfo<v8::Value>& args);

  static void HashDigest(const v8::FunctionCallbackInfo<v8::Value>& args);

  Hash(Environment* env, v8::Local<v8::Object> wrap);

 private:

  ncrypto::EVPMDCtxPointer mdctx_{};

  unsigned int md_len_ = 0;

  ByteSource digest_;

};

struct HashConfig final : public MemoryRetainer {

  CryptoJobMode mode;

  ByteSource in;

  const EVP_MD* digest;

  unsigned int length;

  HashConfig() = default;

  explicit HashConfig(HashConfig&& other) noexcept;

  HashConfig& operator=(HashConfig&& other) noexcept;

  void MemoryInfo(MemoryTracker* tracker) const override;

  SET_MEMORY_INFO_NAME(HashConfig)

  SET_SELF_SIZE(HashConfig)

};

struct HashTraits final {

  using AdditionalParameters = HashConfig;

  static constexpr const char* JobName = "HashJob";

  static constexpr AsyncWrap::ProviderType Provider =

      AsyncWrap::PROVIDER_HASHREQUEST;

  static v8::Maybe<void> AdditionalConfig(

      CryptoJobMode mode,

      const v8::FunctionCallbackInfo<v8::Value>& args,

      unsigned int offset,

      HashConfig* params);

  static bool DeriveBits(Environment* env,

                         const HashConfig& params,

                         ByteSource* out,

                         CryptoJobMode mode);

  static v8::MaybeLocal<v8::Value> EncodeOutput(Environment* env,

                                                const HashConfig& params,

                                                ByteSource* out);

};

using HashJob = DeriveBitsJob<HashTraits>;

}  // namespace crypto

}  // namespace node

#endif  // defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS

#endif  // SRC_CRYPTO_CRYPTO_HASH_H_