syntax = "proto3";

package yandex.cloud.apploadbalancer.v1;

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

import "yandex/cloud/api/operation.proto";
import "yandex/cloud/operation/operation.proto";
import "yandex/cloud/apploadbalancer/v1/backend_group.proto";
import "yandex/cloud/validation.proto";

option go_package = "github.com/yandex-cloud/go-genproto/yandex/cloud/apploadbalancer/v1;apploadbalancer";
option java_package = "yandex.cloud.api.apploadbalancer.v1";

// A set of methods for managing backend groups.
service BackendGroupService {
  // Returns the specified backend group.
  //
  // To get the list of all available backend groups, make a [List] request.
  rpc Get(GetBackendGroupRequest) returns (BackendGroup) {
    option (google.api.http) = { get: "/apploadbalancer/v1/backendGroups/{backend_group_id}" };
  }

  // Lists backend groups in the specified folder.
  rpc List(ListBackendGroupsRequest) returns (ListBackendGroupsResponse) {
    option (google.api.http) = { get: "/apploadbalancer/v1/backendGroups" };
  }

  // Creates a backend group in the specified folder.
  rpc Create(CreateBackendGroupRequest) returns (operation.Operation) {
    option (google.api.http) = { post: "/apploadbalancer/v1/backendGroups" body: "*" };
    option (yandex.cloud.api.operation) = {
      metadata: "CreateBackendGroupMetadata"
      response: "BackendGroup"
    };
  }

  // Updates the specified backend group.
  rpc Update(UpdateBackendGroupRequest) returns (operation.Operation) {
    option (google.api.http) = { patch: "/apploadbalancer/v1/backendGroups/{backend_group_id}" body: "*" };
    option (yandex.cloud.api.operation) = {
      metadata: "UpdateBackendGroupMetadata"
      response: "BackendGroup"
    };
  }

  // Deletes the specified backend group.
  rpc Delete(DeleteBackendGroupRequest) returns (operation.Operation) {
    option (google.api.http) = { delete: "/apploadbalancer/v1/backendGroups/{backend_group_id}" };
    option (yandex.cloud.api.operation) = {
      metadata: "DeleteBackendGroupMetadata"
      response: "google.protobuf.Empty"
    };
  }

  // Adds backends to the specified backend group.
  rpc AddBackend(AddBackendRequest) returns (operation.Operation) {
    option (google.api.http) = { post: "/apploadbalancer/v1/backendGroups/{backend_group_id}:addBackend" body: "*" };
    option (yandex.cloud.api.operation) = {
      metadata: "AddBackendMetadata"
      response: "BackendGroup"
    };
  }

  // Removes backends from the specified backend group.
  rpc RemoveBackend(RemoveBackendRequest) returns (operation.Operation) {
    option (google.api.http) = { post: "/apploadbalancer/v1/backendGroups/{backend_group_id}:removeBackend" body: "*" };
    option (yandex.cloud.api.operation) = {
      metadata: "RemoveBackendMetadata"
      response: "BackendGroup"
    };
  }

  // Updates the specified backend.
  rpc UpdateBackend(UpdateBackendRequest) returns (operation.Operation) {
    option (google.api.http) = { post: "/apploadbalancer/v1/backendGroups/{backend_group_id}:updateBackend" body: "*" };
    option (yandex.cloud.api.operation) = {
      metadata: "UpdateBackendMetadata"
      response: "BackendGroup"
    };
  }

  // Lists operations for the specified backend group.
  rpc ListOperations (ListBackendGroupOperationsRequest) returns (ListBackendGroupOperationsResponse) {
    option (google.api.http) = { get: "/apploadbalancer/v1/backendGroups/{backend_group_id}/operations" };
  }
}

message GetBackendGroupRequest {
  // ID of the backend group to return.
  //
  // To get the backend group ID, make a [BackendGroupService.List] request.
  string backend_group_id = 1 [(required) = true];
}

message ListBackendGroupsRequest {
  // ID of the folder to list backend groups in.
  //
  // To get the folder ID, make a [yandex.cloud.resourcemanager.v1.FolderService.List] request.
  string folder_id = 1 [(required) = true];

  // The maximum number of results per page to return. If the number of available
  // results is larger than `page_size`, the service returns a [ListBackendGroupsResponse.next_page_token]
  // that can be used to get the next page of results in subsequent list requests.
  // Default value: 100.
  int64 page_size = 2 [(value) = "0-1000"];

  // Page token. To get the next page of results, set `page_token` to the
  // [ListBackendGroupsResponse.next_page_token] returned by a previous list request.
  string page_token = 3 [(length) = "<=100"];

  // A filter expression that filters backend groups listed in the response.
  //
  // The expression must specify:
  // 1. The field name. Currently you can use filtering only on [BackendGroup.name] field.
  // 2. An operator. Can be either `=` or `!=` for single values, `IN` or `NOT IN` for lists of values.
  // 3. The value. Must be 3-63 characters long and match the regular expression `^[a-z][-a-z0-9]{1,61}[a-z0-9]`.
  // Example of a filter: `name=my-backend-group`.
  string filter = 4 [(length) = "<=1000"];
}

message ListBackendGroupsResponse {
  // List of backend groups in the specified folder.
  repeated BackendGroup backend_groups = 1;

  // Token for getting the next page of the list. If the number of results is greater than
  // the specified [ListBackendGroupsRequest.page_size], use `next_page_token` as the value
  // for the [ListBackendGroupsRequest.page_token] parameter in the next list request.
  //
  // Each subsequent page will have its own `next_page_token` to continue paging through the results.
  string next_page_token = 2;
}

message DeleteBackendGroupRequest {
  // ID of the backend group to delete.
  //
  // To get the backend group ID, make a [BackendGroupService.List] request.
  string backend_group_id = 1 [(required) = true];
}

message DeleteBackendGroupMetadata {
  // ID of the backend group that is being deleted.
  string backend_group_id = 1;
}

message UpdateBackendGroupRequest {
  // ID of the backend group to update.
  //
  // To get the backend group ID, make a [BackendGroupService.List] request.
  string backend_group_id = 1 [(required) = true];

  // Field mask that specifies which attributes of the backend group should be updated.
  google.protobuf.FieldMask update_mask = 2;

  // New name for the backend group.
  // The name must be unique within the folder.
  string name = 3 [(pattern) = "([a-z]([-a-z0-9]{0,61}[a-z0-9])?)?"];

  // New description of the backend group.
  string description = 4 [(length) = "<=256"];

  // Backend group labels as `key:value` pairs.
  // For details about the concept, see [documentation](/docs/overview/concepts/services#labels).
  //
  // Existing set of labels is completely replaced by the provided set, so if you just want
  // to add or remove a label:
  // 1. Get the current set of labels with a [BackendGroupService.Get] request.
  // 2. Add or remove a label in this set.
  // 3. Send the new set in this field.
  map<string, string> labels = 5 [(yandex.cloud.size) = "<=64", (length) = "<=63", (pattern) = "[-_./\\@0-9a-z]*", (map_key).length = "1-63", (map_key).pattern = "[a-z][-_./\\@0-9a-z]*"];

  // New list of backends in the backend group.
  //
  // A backend group must consist of either HTTP backends or gRPC backends.
  //
  // Existing list of backends is completely replaced by the specified list, so if you just want to add or remove
  // a target, make a [BackendGroupService.AddBackend] request or a [BackendGroupService.RemoveBackend] request.
  oneof backend {
    option (exactly_one) = true;

    // New list of HTTP backends that the backend group will consist of.
    HttpBackendGroup http = 6;

    // New list of gRPC backends that the backend group will consist of.
    GrpcBackendGroup grpc = 7;
  }
}

message UpdateBackendGroupMetadata {
  // ID of the backend group that is being updated.
  string backend_group_id = 1;
}

message CreateBackendGroupRequest {
  // ID of the folder to create a backend group in.
  //
  // To get the folder ID, make a [yandex.cloud.resourcemanager.v1.FolderService.List] request.
  string folder_id = 1 [(required) = true];

  // Name of the backend group.
  // The name must be unique within the folder.
  string name = 2 [(pattern) = "([a-z]([-a-z0-9]{0,61}[a-z0-9])?)?"];

  // Description of the backend group.
  string description = 3 [(length) = "<=256"];

  // Backend group labels as `key:value` pairs.
  // For details about the concept, see [documentation](/docs/overview/concepts/services#labels).
  map<string, string> labels = 4 [(yandex.cloud.size) = "<=64", (length) = "<=63", (pattern) = "[-_./\\@0-9a-z]*", (map_key).length = "1-63", (map_key).pattern = "[a-z][-_./\\@0-9a-z]*"];

  // Backends that the backend group will consist of.
  //
  // A backend group must consist of either HTTP backends or gRPC backends.
  oneof backend {
    // List of HTTP backends that the backend group will consist of.
    HttpBackendGroup http = 5;

    // List of gRPC backends that the backend group consists of.
    GrpcBackendGroup grpc = 6;
  }
}

message CreateBackendGroupMetadata {
  // ID of the backend group that is being created.
  string backend_group_id = 1;
}

message AddBackendRequest {
  // ID of the backend group to add a backend to.
  //
  // To get the backend group ID, make a [BackendGroupService.List] request.
  string backend_group_id = 1 [(required) = true];

  // Backend to add to the backend group.
  //
  // A backend group must consist of either HTTP backends or gRPC backends.
  oneof backend {
    option (exactly_one) = true;

    // HTTP backend to add to the backend group.
    HttpBackend http = 2;

    // gRPC backend to add to the backend group.
    GrpcBackend grpc = 3;
  }
}

message AddBackendMetadata {
  // ID of the backend group that the backend is being added to.
  string backend_group_id = 1;

  // Name of the backend that is being added to the backend group.
  string backend_name = 2;
}

message UpdateBackendRequest {
  // ID of the backend group to update the backend in.
  string backend_group_id = 1 [(required) = true];

  // Field mask that specifies which attributes of the backend should be updated.
  google.protobuf.FieldMask update_mask = 2;

  // Name of the backend to update (required) and new settings for the backend.
  oneof backend {
    option (exactly_one) = true;
    // New settings for the HTTP backend.
    HttpBackend http = 3;

    // New settings for the gRPC backend.
    GrpcBackend grpc = 4;
  }
}

message UpdateBackendMetadata {
  // ID of the backend group that the backend is being updated it.
  string backend_group_id = 1;

  // Name of the backend that is being updated.
  string backend_name = 2;
}

message RemoveBackendRequest {
  // ID of the backend group to remove a backend from.
  //
  // To get the backend group ID, make a [BackendGroupService.List] request.
  string backend_group_id = 1 [(required) = true];

  // Name of the backend to remove.
  //
  // To get the backend name, make a [BackendGroupService.Get] request.
  string backend_name = 2 [(required) = true];
}

message RemoveBackendMetadata {
  // ID of the backend group that the backend is being removed from.
  string backend_group_id = 1;

  // Name of the backend that is being removed.
  string backend_name = 2;
}

message ListBackendGroupOperationsRequest {
  // ID of the backend group to get operations for.
  //
  // To get the backend group ID, use a [BackendGroupService.List] request.
  string backend_group_id = 1 [(required) = true, (length) = "<=50"];

  // The maximum number of results per page that should be returned. If the number of available
  // results is larger than [page_size], the service returns a [ListBackendGroupOperationsResponse.next_page_token]
  // that can be used to get the next page of results in subsequent list requests.
  // Default value: 100.
  int64 page_size = 2 [(value) = "<=1000"];

  // Page token. To get the next page of results, set [page_token] to the
  // [ListBackendGroupOperationsResponse.next_page_token] returned by a previous list request.
  string page_token = 3 [(length) = "<=100"];
}

message ListBackendGroupOperationsResponse {
  // List of operations for the specified backend group.
  repeated operation.Operation operations = 1;

  // Token for getting the next page of the list. If the number of results is greater than
  // the specified [ListBackendGroupOperationsRequest.page_size], use `next_page_token` as the value
  // for the [ListBackendGroupOperationsRequest.page_token] parameter in the next list request.
  //
  // Each subsequent page will have its own `next_page_token` to continue paging through the results.
  string next_page_token = 2;
}