// Copyright 2015-2016 gRPC 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
//
//     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.

// Message definitions to be used by integration test service definitions.

syntax = "proto3";

package grpc.testing;

option java_package = "io.grpc.testing.integration";

// TODO(dgq): Go back to using well-known types once
// https://github.com/grpc/grpc/issues/6980 has been fixed.
// import "google/protobuf/wrappers.proto";
message BoolValue {
  // The bool value.
  bool value = 1;
}

// The type of payload that should be returned.
enum PayloadType {
  // Compressable text format.
  COMPRESSABLE = 0;
}

// A block of data, to simply increase gRPC message size.
message Payload {
  // The type of data in body.
  PayloadType type = 1;
  // Primary contents of payload.
  bytes body = 2;
}

// A protobuf representation for grpc status. This is used by test
// clients to specify a status that the server should attempt to return.
message EchoStatus {
  int32 code = 1;
  string message = 2;
}

// The type of route that a client took to reach a server w.r.t. gRPCLB.
// The server must fill in "fallback" if it detects that the RPC reached
// the server via the "gRPCLB fallback" path, and "backend" if it detects
// that the RPC reached the server via "gRPCLB backend" path (i.e. if it got
// the address of this server from the gRPCLB server BalanceLoad RPC). Exactly
// how this detection is done is context and server dependent.
enum GrpclbRouteType {
  // Server didn't detect the route that a client took to reach it.
  GRPCLB_ROUTE_TYPE_UNKNOWN = 0;
  // Indicates that a client reached a server via gRPCLB fallback.
  GRPCLB_ROUTE_TYPE_FALLBACK = 1;
  // Indicates that a client reached a server as a gRPCLB-given backend.
  GRPCLB_ROUTE_TYPE_BACKEND = 2;
}

// Unary request.
message SimpleRequest {
  // Desired payload type in the response from the server.
  // If response_type is RANDOM, server randomly chooses one from other formats.
  PayloadType response_type = 1;

  // Desired payload size in the response from the server.
  int32 response_size = 2;

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

  // Whether SimpleResponse should include username.
  bool fill_username = 4;

  // Whether SimpleResponse should include OAuth scope.
  bool fill_oauth_scope = 5;

  // Whether to request the server to compress the response. This field is
  // "nullable" in order to interoperate seamlessly with clients not able to
  // implement the full compression tests by introspecting the call to verify
  // the response's compression status.
  BoolValue response_compressed = 6;

  // Whether server should return a given status
  EchoStatus response_status = 7;

  // Whether the server should expect this request to be compressed.
  BoolValue expect_compressed = 8;

  // Whether SimpleResponse should include server_id.
  bool fill_server_id = 9;

  // Whether SimpleResponse should include grpclb_route_type.
  bool fill_grpclb_route_type = 10;

  // If set the server should record this metrics report data for the current RPC.
  TestOrcaReport orca_per_query_report = 11;
}

// Unary response, as configured by the request.
message SimpleResponse {
  // Payload to increase message size.
  Payload payload = 1;
  // The user the request came from, for verifying authentication was
  // successful when the client expected it.
  string username = 2;
  // OAuth scope.
  string oauth_scope = 3;

  // Server ID. This must be unique among different server instances,
  // but the same across all RPC's made to a particular server instance.
  string server_id = 4;
  // gRPCLB Path.
  GrpclbRouteType grpclb_route_type = 5;

  // Server hostname.
  string hostname = 6;
}

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

  // Whether the server should expect this request to be compressed. This field
  // is "nullable" in order to interoperate seamlessly with servers not able to
  // implement the full compression tests by introspecting the call to verify
  // the request's compression status.
  BoolValue expect_compressed = 2;

  // Not expecting any payload from the response.
}

// Client-streaming response.
message StreamingInputCallResponse {
  // Aggregated size of payloads received from the client.
  int32 aggregated_payload_size = 1;
}

// Configuration for a particular response.
message ResponseParameters {
  // Desired payload sizes in responses from the server.
  int32 size = 1;

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

  // Whether to request the server to compress the response. This field is
  // "nullable" in order to interoperate seamlessly with clients not able to
  // implement the full compression tests by introspecting the call to verify
  // the response's compression status.
  BoolValue compressed = 3;
}

// Server-streaming request.
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.
  PayloadType response_type = 1;

  // Configuration for each expected response message.
  repeated ResponseParameters response_parameters = 2;

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

  // Whether server should return a given status
  EchoStatus response_status = 7;

  // If set the server should update this metrics report data at the OOB server.
  TestOrcaReport orca_oob_report = 8;
}

// Server-streaming response, as configured by the request and parameters.
message StreamingOutputCallResponse {
  // Payload to increase response size.
  Payload payload = 1;
}

// For reconnect interop test only.
// Client tells server what reconnection parameters it used.
message ReconnectParams {
  int32 max_reconnect_backoff_ms = 1;
}

// For reconnect interop test only.
// Server tells client whether its reconnects are following the spec and the
// reconnect backoffs it saw.
message ReconnectInfo {
  bool passed = 1;
  repeated int32 backoff_ms = 2;
}

message LoadBalancerStatsRequest {
  // Request stats for the next num_rpcs sent by client.
  int32 num_rpcs = 1;
  // If num_rpcs have not completed within timeout_sec, return partial results.
  int32 timeout_sec = 2;
  // Response header + trailer metadata entries we want the values of.
  // Matching of the keys is case-insensitive as per rfc7540#section-8.1.2
  // * (asterisk) is a special value that will return all metadata entries
  repeated string metadata_keys = 3;
}

message LoadBalancerStatsResponse {
  enum MetadataType {
    UNKNOWN = 0;
    INITIAL = 1;
    TRAILING = 2;
  }
  message MetadataEntry {
    // Key, exactly as received from the server. Case may be different from what
    // was requested in the LoadBalancerStatsRequest)
    string key = 1;
    // Value, exactly as received from the server.
    string value = 2;
    // Metadata type
    MetadataType type = 3;
  }
  message RpcMetadata {
    // metadata values for each rpc for the keys specified in
    // LoadBalancerStatsRequest.metadata_keys.
    repeated MetadataEntry metadata = 1;
  }
  message MetadataByPeer {
    // List of RpcMetadata in for each RPC with a given peer
    repeated RpcMetadata rpc_metadata = 1;
  }
  message RpcsByPeer {
    // The number of completed RPCs for each peer.
    map<string, int32> rpcs_by_peer = 1;
  }
  // The number of completed RPCs for each peer.
  map<string, int32> rpcs_by_peer = 1;
  // The number of RPCs that failed to record a remote peer.
  int32 num_failures = 2;
  map<string, RpcsByPeer> rpcs_by_method = 3;
  // All the metadata of all RPCs for each peer.
  map<string, MetadataByPeer> metadatas_by_peer = 4;
}

// Request for retrieving a test client's accumulated stats.
message LoadBalancerAccumulatedStatsRequest {}

// Accumulated stats for RPCs sent by a test client.
message LoadBalancerAccumulatedStatsResponse {
  // The total number of RPCs have ever issued for each type.
  // Deprecated: use stats_per_method.rpcs_started instead.
  map<string, int32> num_rpcs_started_by_method = 1 [deprecated = true];
  // The total number of RPCs have ever completed successfully for each type.
  // Deprecated: use stats_per_method.result instead.
  map<string, int32> num_rpcs_succeeded_by_method = 2 [deprecated = true];
  // The total number of RPCs have ever failed for each type.
  // Deprecated: use stats_per_method.result instead.
  map<string, int32> num_rpcs_failed_by_method = 3 [deprecated = true];

  message MethodStats {
    // The number of RPCs that were started for this method.
    int32 rpcs_started = 1;

    // The number of RPCs that completed with each status for this method.  The
    // key is the integral value of a google.rpc.Code; the value is the count.
    map<int32, int32> result = 2;
  }

  // Per-method RPC statistics.  The key is the RpcType in string form; e.g.
  // 'EMPTY_CALL' or 'UNARY_CALL'
  map<string, MethodStats> stats_per_method = 4;
}

// Configurations for a test client.
message ClientConfigureRequest {
  // Type of RPCs to send.
  enum RpcType {
    EMPTY_CALL = 0;
    UNARY_CALL = 1;
  }

  // Metadata to be attached for the given type of RPCs.
  message Metadata {
    RpcType type = 1;
    string key = 2;
    string value = 3;
  }

  // The types of RPCs the client sends.
  repeated RpcType types = 1;
  // The collection of custom metadata to be attached to RPCs sent by the client.
  repeated Metadata metadata = 2;
  // The deadline to use, in seconds, for all RPCs.  If unset or zero, the
  // client will use the default from the command-line.
  int32 timeout_sec = 3;
}

// Response for updating a test client's configuration.
message ClientConfigureResponse {}

message MemorySize {
  int64 rss = 1;
}

// Metrics data the server will update and send to the client. It mirrors orca load report
// https://github.com/cncf/xds/blob/eded343319d09f30032952beda9840bbd3dcf7ac/xds/data/orca/v3/orca_load_report.proto#L15,
// but avoids orca dependency. Used by both per-query and out-of-band reporting tests.
message TestOrcaReport {
  double cpu_utilization = 1;
  double memory_utilization = 2;
  map<string, double> request_cost = 3;
  map<string, double> utilization = 4;
}

// Status that will be return to callers of the Hook method
message SetReturnStatusRequest {
  int32 grpc_code_to_return = 1;
  string grpc_status_description = 2;
}

message HookRequest {
  enum HookRequestCommand {
    // Default value
    UNSPECIFIED = 0;
    // Start the HTTP endpoint
    START = 1;
    // Stop
    STOP = 2;
    // Return from HTTP GET/POST
    RETURN = 3;
  }
  HookRequestCommand command = 1;
  int32 grpc_code_to_return = 2;
  string grpc_status_description = 3;
  // Server port to listen to
  int32 server_port = 4;
}

message HookResponse {
}