// Copyright 2019 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.ads.googleads.v2.services;

import "google/ads/googleads/v2/resources/campaign_experiment.proto";
import "google/api/annotations.proto";
import "google/longrunning/operations.proto";
import "google/protobuf/empty.proto";
import "google/protobuf/field_mask.proto";
import "google/rpc/status.proto";
import "google/api/client.proto";

option csharp_namespace = "Google.Ads.GoogleAds.V2.Services";
option go_package = "google.golang.org/genproto/googleapis/ads/googleads/v2/services;services";
option java_multiple_files = true;
option java_outer_classname = "CampaignExperimentServiceProto";
option java_package = "com.google.ads.googleads.v2.services";
option objc_class_prefix = "GAA";
option php_namespace = "Google\\Ads\\GoogleAds\\V2\\Services";
option ruby_package = "Google::Ads::GoogleAds::V2::Services";

// Proto file describing the Campaign Experiment service.

// CampaignExperimentService manages the life cycle of campaign experiments.
// It is used to create new experiments from drafts, modify experiment
// properties, promote changes in an experiment back to its base campaign,
// graduate experiments into new stand-alone campaigns, and to remove an
// experiment.
//
// An experiment consists of two variants or arms - the base campaign and the
// experiment campaign, directing a fixed share of traffic to each arm.
// A campaign experiment is created from a draft of changes to the base campaign
// and will be a snapshot of changes in the draft at the time of creation.
service CampaignExperimentService {
  option (google.api.default_host) = "googleads.googleapis.com";

  // Returns the requested campaign experiment in full detail.
  rpc GetCampaignExperiment(GetCampaignExperimentRequest) returns (google.ads.googleads.v2.resources.CampaignExperiment) {
    option (google.api.http) = {
      get: "/v2/{resource_name=customers/*/campaignExperiments/*}"
    };
  }

  // Creates a campaign experiment based on a campaign draft. The draft campaign
  // will be forked into a real campaign (called the experiment campaign) that
  // will begin serving ads if successfully created.
  //
  // The campaign experiment is created immediately with status INITIALIZING.
  // This method return a long running operation that tracks the forking of the
  // draft campaign. If the forking fails, a list of errors can be retrieved
  // using the ListCampaignExperimentAsyncErrors method. The operation's
  // metadata will be a StringValue containing the resource name of the created
  // campaign experiment.
  rpc CreateCampaignExperiment(CreateCampaignExperimentRequest) returns (google.longrunning.Operation) {
    option (google.api.http) = {
      post: "/v2/customers/{customer_id=*}/campaignExperiments:create"
      body: "*"
    };
    option (google.longrunning.operation_info) = {
      response_type: "google.protobuf.Empty"
      metadata_type: "google.ads.googleads.v2.services.CreateCampaignExperimentMetadata"
    };
  }

  // Updates campaign experiments. Operation statuses are returned.
  rpc MutateCampaignExperiments(MutateCampaignExperimentsRequest) returns (MutateCampaignExperimentsResponse) {
    option (google.api.http) = {
      post: "/v2/customers/{customer_id=*}/campaignExperiments:mutate"
      body: "*"
    };
  }

  // Graduates a campaign experiment to a full campaign. The base and experiment
  // campaigns will start running independently with their own budgets.
  rpc GraduateCampaignExperiment(GraduateCampaignExperimentRequest) returns (GraduateCampaignExperimentResponse) {
    option (google.api.http) = {
      post: "/v2/{campaign_experiment=customers/*/campaignExperiments/*}:graduate"
      body: "*"
    };
  }

  // Promotes the changes in a experiment campaign back to the base campaign.
  //
  // The campaign experiment is updated immediately with status PROMOTING.
  // This method return a long running operation that tracks the promoting of
  // the experiment campaign. If the promoting fails, a list of errors can be
  // retrieved using the ListCampaignExperimentAsyncErrors method.
  rpc PromoteCampaignExperiment(PromoteCampaignExperimentRequest) returns (google.longrunning.Operation) {
    option (google.api.http) = {
      post: "/v2/{campaign_experiment=customers/*/campaignExperiments/*}:promote"
      body: "*"
    };
    option (google.longrunning.operation_info) = {
      response_type: "google.protobuf.Empty"
    };
  }

  // Immediately ends a campaign experiment, changing the experiment's scheduled
  // end date and without waiting for end of day. End date is updated to be the
  // time of the request.
  rpc EndCampaignExperiment(EndCampaignExperimentRequest) returns (google.protobuf.Empty) {
    option (google.api.http) = {
      post: "/v2/{campaign_experiment=customers/*/campaignExperiments/*}:end"
      body: "*"
    };
  }

  // Returns all errors that occurred during CampaignExperiment create or
  // promote (whichever occurred last).
  // Supports standard list paging.
  rpc ListCampaignExperimentAsyncErrors(ListCampaignExperimentAsyncErrorsRequest) returns (ListCampaignExperimentAsyncErrorsResponse) {
    option (google.api.http) = {
      get: "/v2/{resource_name=customers/*/campaignExperiments/*}:listAsyncErrors"
    };
  }
}

// Request message for [CampaignExperimentService.GetCampaignExperiment][google.ads.googleads.v2.services.CampaignExperimentService.GetCampaignExperiment].
message GetCampaignExperimentRequest {
  // The resource name of the campaign experiment to fetch.
  string resource_name = 1;
}

// Request message for [CampaignExperimentService.MutateCampaignExperiments][google.ads.googleads.v2.services.CampaignExperimentService.MutateCampaignExperiments].
message MutateCampaignExperimentsRequest {
  // The ID of the customer whose campaign experiments are being modified.
  string customer_id = 1;

  // The list of operations to perform on individual campaign experiments.
  repeated CampaignExperimentOperation operations = 2;

  // If true, successful operations will be carried out and invalid
  // operations will return errors. If false, all operations will be carried
  // out in one transaction if and only if they are all valid.
  // Default is false.
  bool partial_failure = 3;

  // If true, the request is validated but not executed. Only errors are
  // returned, not results.
  bool validate_only = 4;
}

// A single update operation on a campaign experiment.
message CampaignExperimentOperation {
  // FieldMask that determines which resource fields are modified in an update.
  google.protobuf.FieldMask update_mask = 3;

  // The mutate operation.
  oneof operation {
    // Update operation: The campaign experiment is expected to have a valid
    // resource name.
    google.ads.googleads.v2.resources.CampaignExperiment update = 1;

    // Remove operation: The campaign experiment is expected to have a valid
    // resource name, in this format:
    //
    // `customers/{customer_id}/campaignExperiments/{campaign_experiment_id}`
    string remove = 2;
  }
}

// Response message for campaign experiment mutate.
message MutateCampaignExperimentsResponse {
  // Errors that pertain to operation failures in the partial failure mode.
  // Returned only when partial_failure = true and all errors occur inside the
  // operations. If any errors occur outside the operations (e.g. auth errors),
  // we return an RPC level error.
  google.rpc.Status partial_failure_error = 3;

  // All results for the mutate.
  repeated MutateCampaignExperimentResult results = 2;
}

// The result for the campaign experiment mutate.
message MutateCampaignExperimentResult {
  // Returned for successful operations.
  string resource_name = 1;
}

// Request message for [CampaignExperimentService.CreateCampaignExperiment][google.ads.googleads.v2.services.CampaignExperimentService.CreateCampaignExperiment].
message CreateCampaignExperimentRequest {
  // The ID of the customer whose campaign experiment is being created.
  string customer_id = 1;

  // The campaign experiment to be created.
  google.ads.googleads.v2.resources.CampaignExperiment campaign_experiment = 2;

  // If true, the request is validated but not executed. Only errors are
  // returned, not results.
  bool validate_only = 3;
}

// Message used as metadata returned in Long Running Operations for
// CreateCampaignExperimentRequest
message CreateCampaignExperimentMetadata {
  // Resource name of campaign experiment created.
  string campaign_experiment = 1;
}

// Request message for [CampaignExperimentService.GraduateCampaignExperiment][google.ads.googleads.v2.services.CampaignExperimentService.GraduateCampaignExperiment].
message GraduateCampaignExperimentRequest {
  // The resource name of the campaign experiment to graduate.
  string campaign_experiment = 1;

  // Resource name of the budget to attach to the campaign graduated from the
  // experiment.
  string campaign_budget = 2;
}

// Response message for campaign experiment graduate.
message GraduateCampaignExperimentResponse {
  // The resource name of the campaign from the graduated experiment.
  // This campaign is the same one as CampaignExperiment.experiment_campaign.
  string graduated_campaign = 1;
}

// Request message for [CampaignExperimentService.PromoteCampaignExperiment][google.ads.googleads.v2.services.CampaignExperimentService.PromoteCampaignExperiment].
message PromoteCampaignExperimentRequest {
  // The resource name of the campaign experiment to promote.
  string campaign_experiment = 1;
}

// Request message for [CampaignExperimentService.EndCampaignExperiment][google.ads.googleads.v2.services.CampaignExperimentService.EndCampaignExperiment].
message EndCampaignExperimentRequest {
  // The resource name of the campaign experiment to end.
  string campaign_experiment = 1;
}

// Request message for
// [CampaignExperimentService.ListCampaignExperimentAsyncErrors][google.ads.googleads.v2.services.CampaignExperimentService.ListCampaignExperimentAsyncErrors].
message ListCampaignExperimentAsyncErrorsRequest {
  // The name of the campaign experiment from which to retrieve the async
  // errors.
  string resource_name = 1;

  // Token of the page to retrieve. If not specified, the first
  // page of results will be returned. Use the value obtained from
  // `next_page_token` in the previous response in order to request
  // the next page of results.
  string page_token = 2;

  // Number of elements to retrieve in a single page.
  // When a page request is too large, the server may decide to
  // further limit the number of returned resources.
  int32 page_size = 3;
}

// Response message for
// [CampaignExperimentService.ListCampaignExperimentAsyncErrors][google.ads.googleads.v2.services.CampaignExperimentService.ListCampaignExperimentAsyncErrors].
message ListCampaignExperimentAsyncErrorsResponse {
  // Details of the errors when performing the asynchronous operation.
  repeated google.rpc.Status errors = 1;

  // Pagination token used to retrieve the next page of results.
  // Pass the content of this string as the `page_token` attribute of
  // the next request. `next_page_token` is not returned for the last
  // page.
  string next_page_token = 2;
}