// Copyright 2020 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
//
//     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.

syntax = "proto3";

package google.cloud.servicedirectory.v1;

import "google/api/annotations.proto";
import "google/api/client.proto";
import "google/api/field_behavior.proto";
import "google/api/resource.proto";
import "google/cloud/servicedirectory/v1/service.proto";

option cc_enable_arenas = true;
option csharp_namespace = "Google.Cloud.ServiceDirectory.V1";
option go_package = "cloud.google.com/go/servicedirectory/apiv1/servicedirectorypb;servicedirectorypb";
option java_multiple_files = true;
option java_outer_classname = "LookupServiceProto";
option java_package = "com.google.cloud.servicedirectory.v1";
option php_namespace = "Google\\Cloud\\ServiceDirectory\\V1";
option ruby_package = "Google::Cloud::ServiceDirectory::V1";

// Service Directory API for looking up service data at runtime.
service LookupService {
  option (google.api.default_host) = "servicedirectory.googleapis.com";
  option (google.api.oauth_scopes) =
      "https://www.googleapis.com/auth/cloud-platform";

  // Returns a [service][google.cloud.servicedirectory.v1.Service] and its
  // associated endpoints.
  // Resolving a service is not considered an active developer method.
  rpc ResolveService(ResolveServiceRequest) returns (ResolveServiceResponse) {
    option (google.api.http) = {
      post: "/v1/{name=projects/*/locations/*/namespaces/*/services/*}:resolve"
      body: "*"
    };
  }
}

// The request message for
// [LookupService.ResolveService][google.cloud.servicedirectory.v1.LookupService.ResolveService].
// Looks up a service by its name, returns the service and its endpoints.
message ResolveServiceRequest {
  // Required. The name of the service to resolve.
  string name = 1 [
    (google.api.field_behavior) = REQUIRED,
    (google.api.resource_reference) = {
      type: "servicedirectory.googleapis.com/Service"
    }
  ];

  // Optional. The maximum number of endpoints to return. Defaults to 25.
  // Maximum is 100. If a value less than one is specified, the Default is used.
  // If a value greater than the Maximum is specified, the Maximum is used.
  int32 max_endpoints = 2 [(google.api.field_behavior) = OPTIONAL];

  // Optional. The filter applied to the endpoints of the resolved service.
  //
  // General filter string syntax:
  // <field> <operator> <value> (<logical connector>)
  // <field> can be "name" or "metadata.<key>" for map field.
  // <operator> can be "<, >, <=, >=, !=, =, :". Of which ":" means HAS and is
  // roughly the same as "=".
  // <value> must be the same data type as the field.
  // <logical connector> can be "AND, OR, NOT".
  //
  // Examples of valid filters:
  // * "metadata.owner" returns Endpoints that have a label with the
  //   key "owner", this is the same as "metadata:owner"
  // * "metadata.protocol=gRPC" returns Endpoints that have key/value
  //   "protocol=gRPC"
  // * "metadata.owner!=sd AND metadata.foo=bar" returns
  //   Endpoints that have "owner" field in metadata with a value that is not
  //   "sd" AND have the key/value foo=bar.
  string endpoint_filter = 3 [(google.api.field_behavior) = OPTIONAL];
}

// The response message for
// [LookupService.ResolveService][google.cloud.servicedirectory.v1.LookupService.ResolveService].
message ResolveServiceResponse {
  Service service = 1;
}