// Copyright 2022 Google LLC
//
// 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.

// Generated by the Codegen C++ plugin.
// If you make any local changes, they will be lost.
// source: google/pubsub/v1/pubsub.proto

#ifndef GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_PUBSUB_INTERNAL_SUBSCRIBER_ROUND_ROBIN_DECORATOR_H
#define GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_PUBSUB_INTERNAL_SUBSCRIBER_ROUND_ROBIN_DECORATOR_H

#include "google/cloud/pubsub/internal/subscriber_stub.h"
#include "google/cloud/version.h"
#include <memory>
#include <mutex>
#include <vector>

// Must be included last.
#include "google/cloud/ports_def.inc"

namespace google {
namespace cloud {
namespace pubsub_internal {
GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_BEGIN

class SubscriberRoundRobin : public SubscriberStub {
 public:
  explicit SubscriberRoundRobin(
      std::vector<std::shared_ptr<SubscriberStub>> children);
  ~SubscriberRoundRobin() override = default;

  StatusOr<google::pubsub::v1::Subscription> CreateSubscription(
      grpc::ClientContext& context, Options const& options,
      google::pubsub::v1::Subscription const& request) override;

  StatusOr<google::pubsub::v1::Subscription> GetSubscription(
      grpc::ClientContext& context, Options const& options,
      google::pubsub::v1::GetSubscriptionRequest const& request) override;

  StatusOr<google::pubsub::v1::Subscription> UpdateSubscription(
      grpc::ClientContext& context, Options const& options,
      google::pubsub::v1::UpdateSubscriptionRequest const& request) override;

  StatusOr<google::pubsub::v1::ListSubscriptionsResponse> ListSubscriptions(
      grpc::ClientContext& context, Options const& options,
      google::pubsub::v1::ListSubscriptionsRequest const& request) override;

  Status DeleteSubscription(
      grpc::ClientContext& context, Options const& options,
      google::pubsub::v1::DeleteSubscriptionRequest const& request) override;

  StatusOr<google::pubsub::v1::PullResponse> Pull(
      grpc::ClientContext& context, Options const& options,
      google::pubsub::v1::PullRequest const& request) override;

  std::unique_ptr<::google::cloud::AsyncStreamingReadWriteRpc<
      google::pubsub::v1::StreamingPullRequest,
      google::pubsub::v1::StreamingPullResponse>>
  AsyncStreamingPull(
      google::cloud::CompletionQueue const& cq,
      std::shared_ptr<grpc::ClientContext> context,
      google::cloud::internal::ImmutableOptions options) override;

  Status ModifyPushConfig(
      grpc::ClientContext& context, Options const& options,
      google::pubsub::v1::ModifyPushConfigRequest const& request) override;

  StatusOr<google::pubsub::v1::Snapshot> GetSnapshot(
      grpc::ClientContext& context, Options const& options,
      google::pubsub::v1::GetSnapshotRequest const& request) override;

  StatusOr<google::pubsub::v1::ListSnapshotsResponse> ListSnapshots(
      grpc::ClientContext& context, Options const& options,
      google::pubsub::v1::ListSnapshotsRequest const& request) override;

  StatusOr<google::pubsub::v1::Snapshot> CreateSnapshot(
      grpc::ClientContext& context, Options const& options,
      google::pubsub::v1::CreateSnapshotRequest const& request) override;

  StatusOr<google::pubsub::v1::Snapshot> UpdateSnapshot(
      grpc::ClientContext& context, Options const& options,
      google::pubsub::v1::UpdateSnapshotRequest const& request) override;

  Status DeleteSnapshot(
      grpc::ClientContext& context, Options const& options,
      google::pubsub::v1::DeleteSnapshotRequest const& request) override;

  StatusOr<google::pubsub::v1::SeekResponse> Seek(
      grpc::ClientContext& context, Options const& options,
      google::pubsub::v1::SeekRequest const& request) override;

  StatusOr<google::iam::v1::Policy> SetIamPolicy(
      grpc::ClientContext& context, Options const& options,
      google::iam::v1::SetIamPolicyRequest const& request) override;

  StatusOr<google::iam::v1::Policy> GetIamPolicy(
      grpc::ClientContext& context, Options const& options,
      google::iam::v1::GetIamPolicyRequest const& request) override;

  StatusOr<google::iam::v1::TestIamPermissionsResponse> TestIamPermissions(
      grpc::ClientContext& context, Options const& options,
      google::iam::v1::TestIamPermissionsRequest const& request) override;

  future<Status> AsyncModifyAckDeadline(
      google::cloud::CompletionQueue& cq,
      std::shared_ptr<grpc::ClientContext> context,
      google::cloud::internal::ImmutableOptions options,
      google::pubsub::v1::ModifyAckDeadlineRequest const& request) override;

  future<Status> AsyncAcknowledge(
      google::cloud::CompletionQueue& cq,
      std::shared_ptr<grpc::ClientContext> context,
      google::cloud::internal::ImmutableOptions options,
      google::pubsub::v1::AcknowledgeRequest const& request) override;

 private:
  std::shared_ptr<SubscriberStub> Child();

  std::vector<std::shared_ptr<SubscriberStub>> const children_;
  std::mutex mu_;
  std::size_t current_ = 0;
};

GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
}  // namespace pubsub_internal
}  // namespace cloud
}  // namespace google

#include "google/cloud/ports_undef.inc"

#endif  // GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_PUBSUB_INTERNAL_SUBSCRIBER_ROUND_ROBIN_DECORATOR_H
