/*
 * Copyright (c) Meta Platforms, Inc. and affiliates.
 *
 * 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
 *
 *     http://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.
 */

#pragma once

#include <folly/ExceptionWrapper.h>
#include <folly/io/IOBuf.h>
#include <folly/io/async/HHWheelTimer.h>
#include <folly/io/async/Request.h>

#include <thrift/lib/cpp2/async/RpcOptions.h>
#include <thrift/lib/cpp2/async/StreamCallbacks.h>
#include <thrift/lib/cpp2/transport/rocket/Types.h>
#include <thrift/lib/thrift/gen-cpp2/RpcMetadata_types.h>

namespace apache::thrift::rocket {
class RocketClient;

class RocketStreamServerCallback : public StreamServerCallback {
 public:
  RocketStreamServerCallback(
      StreamId streamId,
      RocketClient& client,
      StreamClientCallback& clientCallback)
      : client_(client),
        clientCallback_(&clientCallback),
        streamId_(streamId) {}

  bool onStreamRequestN(uint64_t tokens) override;
  void onStreamCancel() override;

  bool onSinkHeaders(HeadersPayload&& payload) override;

  void resetClientCallback(StreamClientCallback& clientCallback) override {
    clientCallback_ = &clientCallback;
  }

  [[nodiscard]] bool onInitialPayload(
      FirstResponsePayload&&, folly::EventBase*);
  void onInitialError(folly::exception_wrapper ew);

  [[nodiscard]] bool onStreamPayload(StreamPayload&&);
  void onStreamFinalPayload(StreamPayload&&);
  void onStreamComplete();
  void onStreamError(folly::exception_wrapper);
  void onStreamHeaders(HeadersPayload&&);

  StreamId streamId() const noexcept { return streamId_; }

 protected:
  RocketClient& client_;

 private:
  StreamClientCallback* clientCallback_;
  StreamId streamId_;
};

} // namespace apache::thrift::rocket
