// Copyright 2025 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.v21.services;

import "google/ads/googleads/v21/enums/month_of_year.proto";
import "google/ads/googleads/v21/resources/invoice.proto";
import "google/api/annotations.proto";
import "google/api/client.proto";
import "google/api/field_behavior.proto";

option csharp_namespace = "Google.Ads.GoogleAds.V21.Services";
option go_package = "google.golang.org/genproto/googleapis/ads/googleads/v21/services;services";
option java_multiple_files = true;
option java_outer_classname = "InvoiceServiceProto";
option java_package = "com.google.ads.googleads.v21.services";
option objc_class_prefix = "GAA";
option php_namespace = "Google\\Ads\\GoogleAds\\V21\\Services";
option ruby_package = "Google::Ads::GoogleAds::V21::Services";

// Proto file describing the Invoice service.

// A service to fetch invoices issued for a billing setup during a given month.
service InvoiceService {
  option (google.api.default_host) = "googleads.googleapis.com";
  option (google.api.oauth_scopes) = "https://www.googleapis.com/auth/adwords";

  // Returns all invoices associated with a billing setup, for a given month.
  //
  // List of thrown errors:
  //   [AuthenticationError]()
  //   [AuthorizationError]()
  //   [FieldError]()
  //   [HeaderError]()
  //   [InternalError]()
  //   [InvoiceError]()
  //   [QuotaError]()
  //   [RequestError]()
  rpc ListInvoices(ListInvoicesRequest) returns (ListInvoicesResponse) {
    option (google.api.http) = {
      get: "/v21/customers/{customer_id=*}/invoices"
    };
    option (google.api.method_signature) =
        "customer_id,billing_setup,issue_year,issue_month";
  }
}

// Request message for fetching the invoices of a given billing setup that were
// issued during a given month.
message ListInvoicesRequest {
  // Required. The ID of the customer to fetch invoices for.
  string customer_id = 1 [(google.api.field_behavior) = REQUIRED];

  // Required. The billing setup resource name of the requested invoices.
  //
  // `customers/{customer_id}/billingSetups/{billing_setup_id}`
  string billing_setup = 2 [(google.api.field_behavior) = REQUIRED];

  // Required. The issue year to retrieve invoices, in yyyy format. Only
  // invoices issued in 2019 or later can be retrieved.
  string issue_year = 3 [(google.api.field_behavior) = REQUIRED];

  // Required. The issue month to retrieve invoices.
  google.ads.googleads.v21.enums.MonthOfYearEnum.MonthOfYear issue_month = 4
      [(google.api.field_behavior) = REQUIRED];
}

// Response message for
// [InvoiceService.ListInvoices][google.ads.googleads.v21.services.InvoiceService.ListInvoices].
message ListInvoicesResponse {
  // The list of invoices that match the billing setup and time period.
  repeated google.ads.googleads.v21.resources.Invoice invoices = 1;
}