syntax = "proto3";

// Echo Service
//
// Echo Service API consists of a single service which returns
// a message.
package grpc.gateway.examples.internal.proto.examplepb;

import "google/api/annotations.proto";
import "google/protobuf/field_mask.proto";
import "google/protobuf/struct.proto";

option go_package = "github.com/grpc-ecosystem/grpc-gateway/v2/examples/internal/proto/examplepb";

// Embedded represents a message embedded in SimpleMessage.
message Embedded {
  oneof mark {
    int64 progress = 1;
    string note = 2;
  }
}

message NestedMessage {
  string n_id = 1;
  string val = 2;
}

// SimpleMessage represents a simple message sent to the Echo service.
message SimpleMessage {
  // Id represents the message identifier.
  string id = 1;
  int64 num = 2;
  oneof code {
    int64 line_num = 3;
    string lang = 4;
  }
  Embedded status = 5;
  oneof ext {
    int64 en = 6;
    Embedded no = 7;
  }
  string resource_id = 8;
  NestedMessage n_id = 9;
}

// DynamicMessage represents a message which can have its structure
// built dynamically using Struct and Values.
message DynamicMessage {
  google.protobuf.Struct struct_field = 1;
  google.protobuf.Value value_field = 2;
}

message DynamicMessageUpdate {
  DynamicMessage body = 1;
  google.protobuf.FieldMask update_mask = 2;
}

// Echo service responds to incoming echo requests.
service EchoService {
  // Echo method receives a simple message and returns it.
  //
  // The message posted as the id parameter will also be
  // returned.
  rpc Echo(SimpleMessage) returns (SimpleMessage) {
    option (google.api.http) = {
      post: "/v1/example/echo/{id}"
      additional_bindings: {get: "/v1/example/echo/{id}/{num}"}
      additional_bindings: {get: "/v1/example/echo/{id}/{num}/{lang}"}
      additional_bindings: {get: "/v1/example/echo1/{id}/{line_num}/{status.note}"}
      additional_bindings: {get: "/v1/example/echo2/{no.note}"}
      additional_bindings: {get: "/v1/example/echo/resource/{resource_id}"}
      additional_bindings: {get: "/v1/example/echo/nested/{n_id.n_id}"}
    };
  }
  // EchoBody method receives a simple message and returns it.
  rpc EchoBody(SimpleMessage) returns (SimpleMessage) {
    option (google.api.http) = {
      post: "/v1/example/echo_body"
      body: "*"
      additional_bindings: {
        put: "/v1/example/echo_body/{id}"
        body: "no"
      }
    };
  }
  // EchoDelete method receives a simple message and returns it.
  rpc EchoDelete(SimpleMessage) returns (SimpleMessage) {
    option (google.api.http) = {delete: "/v1/example/echo_delete"};
  }
  // EchoPatch method receives a NonStandardUpdateRequest and returns it.
  rpc EchoPatch(DynamicMessageUpdate) returns (DynamicMessageUpdate) {
    option (google.api.http) = {
      patch: "/v1/example/echo_patch"
      body: "body"
    };
  }
  // EchoUnauthorized method receives a simple message and returns it. It must
  // always return a google.rpc.Code of `UNAUTHENTICATED` and a HTTP Status code
  // of 401.
  rpc EchoUnauthorized(SimpleMessage) returns (SimpleMessage) {
    option (google.api.http) = {get: "/v1/example/echo_unauthorized"};
  }
}
