// Copyright 2020 The Abseil Authors.

//

// Licensed under the Apache License, Version 2.0 (the "License");

// you may not use this file except in compliance with the License.

// You may obtain a copy of the License at

//

//      https://www.apache.org/licenses/LICENSE-2.0

//

// Unless required by applicable law or agreed to in writing, software

// distributed under the License is distributed on an "AS IS" BASIS,

// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

// See the License for the specific language governing permissions and

// limitations under the License.

#include "absl/status/statusor.h"

#include <cstdlib>

#include <utility>

#include "absl/base/call_once.h"

#include "absl/base/config.h"

#include "absl/base/internal/raw_logging.h"

#include "absl/base/nullability.h"

#include "absl/status/internal/statusor_internal.h"

#include "absl/status/status.h"

#include "absl/strings/str_cat.h"

namespace absl {

ABSL_NAMESPACE_BEGIN

BadStatusOrAccess::BadStatusOrAccess(absl::Status status)

    : status_(std::move(status)) {}

BadStatusOrAccess::BadStatusOrAccess(const BadStatusOrAccess& other)

    : status_(other.status_) {}

BadStatusOrAccess& BadStatusOrAccess::operator=(

    const BadStatusOrAccess& other) {

  // Ensure assignment is correct regardless of whether this->InitWhat() has

  // already been called.

  other.InitWhat();

  status_ = other.status_;

  what_ = other.what_;

  return *this;

}

BadStatusOrAccess& BadStatusOrAccess::operator=(BadStatusOrAccess&& other) {

  // Ensure assignment is correct regardless of whether this->InitWhat() has

  // already been called.

  other.InitWhat();

  status_ = std::move(other.status_);

  what_ = std::move(other.what_);

  return *this;

}

BadStatusOrAccess::BadStatusOrAccess(BadStatusOrAccess&& other)

    : status_(std::move(other.status_)) {}

const char* absl_nonnull BadStatusOrAccess::what() const noexcept {

  InitWhat();

  return what_.c_str();

}

const absl::Status& BadStatusOrAccess::status() const { return status_; }

void BadStatusOrAccess::InitWhat() const {

  absl::call_once(init_what_, [this] {

    what_ = absl::StrCat("Bad StatusOr access: ", status_.ToString());

  });

}

namespace internal_statusor {

void Helper::HandleInvalidStatusCtorArg(absl::Status* absl_nonnull status) {

  const char* kMessage =

      "An OK status is not a valid constructor argument to StatusOr<T>";

#ifdef NDEBUG

  ABSL_INTERNAL_LOG(ERROR, kMessage);

#else

  ABSL_INTERNAL_LOG(FATAL, kMessage);

#endif

  // In optimized builds, we will fall back to InternalError.

  *status = absl::InternalError(kMessage);

}

void Helper::Crash(const absl::Status& status) {

  ABSL_INTERNAL_LOG(

      FATAL,

      absl::StrCat("Attempting to fetch value instead of handling error ",

                   status.ToString()));

}

void ThrowBadStatusOrAccess(absl::Status status) {

#ifdef ABSL_HAVE_EXCEPTIONS

  throw absl::BadStatusOrAccess(std::move(status));

#else

  ABSL_INTERNAL_LOG(

      FATAL,

      absl::StrCat("Attempting to fetch value instead of handling error ",

                   status.ToString()));

  std::abort();

#endif

}

}  // namespace internal_statusor

ABSL_NAMESPACE_END

}  // namespace absl