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// An integration test service that covers all the method signature permutations
// of unary/streaming requests/responses.
// This file is duplicated around the code base. See GitHub issue #526.
syntax = "proto2";

// TODO(atash): Investigate this statement's utility.
// package grpc.testing;

enum PayloadType {
  // Compressable text format.
  COMPRESSABLE= 1;

  // Uncompressable binary format.
  UNCOMPRESSABLE = 2;

  // Randomly chosen from all other formats defined in this enum.
  RANDOM = 3;
}

message Payload {
  required PayloadType payload_type = 1;
  oneof payload_body {
    string payload_compressable = 2;
    bytes payload_uncompressable = 3;
  }
}

message SimpleRequest {
  // Desired payload type in the response from the server.
  // If response_type is RANDOM, server randomly chooses one from other formats.
  optional PayloadType response_type = 1 [default=COMPRESSABLE];

  // Desired payload size in the response from the server.
  // If response_type is COMPRESSABLE, this denotes the size before compression.
  optional int32 response_size = 2;

  // Optional input payload sent along with the request.
  optional Payload payload = 3;
}

message SimpleResponse {
  optional Payload payload = 1;
}

message StreamingInputCallRequest {
  // Optional input payload sent along with the request.
  optional Payload payload = 1;

  // Not expecting any payload from the response.
}

message StreamingInputCallResponse {
  // Aggregated size of payloads received from the client.
  optional int32 aggregated_payload_size = 1;
}

message ResponseParameters {
  // Desired payload sizes in responses from the server.
  // If response_type is COMPRESSABLE, this denotes the size before compression.
  required int32 size = 1;

  // Desired interval between consecutive responses in the response stream in
  // microseconds.
  required int32 interval_us = 2;
}

message StreamingOutputCallRequest {
  // Desired payload type in the response from the server.
  // If response_type is RANDOM, the payload from each response in the stream
  // might be of different types. This is to simulate a mixed type of payload
  // stream.
  optional PayloadType response_type = 1 [default=COMPRESSABLE];

  repeated ResponseParameters response_parameters = 2;

  // Optional input payload sent along with the request.
  optional Payload payload = 3;
}

message StreamingOutputCallResponse {
  optional Payload payload = 1;
}

service TestService {
  // One request followed by one response.
  // The server returns the client payload as-is.
  rpc UnaryCall(SimpleRequest) returns (SimpleResponse);

  // One request followed by a sequence of responses (streamed download).
  // The server returns the payload with client desired type and sizes.
  rpc StreamingOutputCall(StreamingOutputCallRequest)
      returns (stream StreamingOutputCallResponse);

  // A sequence of requests followed by one response (streamed upload).
  // The server returns the aggregated size of client payload as the result.
  rpc StreamingInputCall(stream StreamingInputCallRequest)
      returns (StreamingInputCallResponse);

  // A sequence of requests with each request served by the server immediately.
  // As one request could lead to multiple responses, this interface
  // demonstrates the idea of full duplexing.
  rpc FullDuplexCall(stream StreamingOutputCallRequest)
      returns (stream StreamingOutputCallResponse);

  // A sequence of requests followed by a sequence of responses.
  // The server buffers all the client requests and then serves them in order. A
  // stream of responses are returned to the client when the server starts with
  // first request.
  rpc HalfDuplexCall(stream StreamingOutputCallRequest)
      returns (stream StreamingOutputCallResponse);
}