// Copyright 2021 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.sql.v1;

import "google/api/annotations.proto";
import "google/api/field_behavior.proto";
import "google/cloud/sql/v1/cloud_sql_resources.proto";
import "google/protobuf/timestamp.proto";
import "google/api/client.proto";

option go_package = "cloud.google.com/go/sql/apiv1/sqlpb;sqlpb";
option java_multiple_files = true;
option java_outer_classname = "CloudSqlConnectProto";
option java_package = "com.google.cloud.sql.v1";

// LINT: LEGACY_NAMES

// Cloud SQL connect service.
service SqlConnectService {
  option (google.api.default_host) = "sqladmin.googleapis.com";
  option (google.api.oauth_scopes) =
      "https://www.googleapis.com/auth/cloud-platform,"
      "https://www.googleapis.com/auth/sqlservice.admin";

  // Retrieves connect settings about a Cloud SQL instance.
  rpc GetConnectSettings(GetConnectSettingsRequest) returns (ConnectSettings) {
    option (google.api.http) = {
      get: "/v1/projects/{project}/instances/{instance}/connectSettings"
    };
  }

  // Generates a short-lived X509 certificate containing the provided public key
  // and signed by a private key specific to the target instance. Users may use
  // the certificate to authenticate as themselves when connecting to the
  // database.
  rpc GenerateEphemeralCert(GenerateEphemeralCertRequest) returns (GenerateEphemeralCertResponse) {
    option (google.api.http) = {
      post: "/v1/projects/{project}/instances/{instance}:generateEphemeralCert"
      body: "*"
    };
  }
}

// Connect settings retrieval request.
message GetConnectSettingsRequest {
  // Cloud SQL instance ID. This does not include the project ID.
  string instance = 1;

  // Project ID of the project that contains the instance.
  string project = 2;

  // Optional. Optional snapshot read timestamp to trade freshness for performance.
  google.protobuf.Timestamp read_time = 7 [(google.api.field_behavior) = OPTIONAL];
}

// Connect settings retrieval response.
message ConnectSettings {
  // This is always `sql#connectSettings`.
  string kind = 1;

  // SSL configuration.
  SslCert server_ca_cert = 2;

  // The assigned IP addresses for the instance.
  repeated IpMapping ip_addresses = 3;

  // The cloud region for the instance. e.g. **us-central1**, **europe-west1**.
  // The region cannot be changed after instance creation.
  string region = 4;

  // The database engine type and version. The **databaseVersion**
  // field cannot be changed after instance creation.
  //   MySQL instances: **MYSQL_8_0**, **MYSQL_5_7** (default),
  // or **MYSQL_5_6**.
  //   PostgreSQL instances: **POSTGRES_9_6**, **POSTGRES_10**,
  // **POSTGRES_11** or **POSTGRES_12** (default).
  //   SQL Server instances: **SQLSERVER_2017_STANDARD** (default),
  // **SQLSERVER_2017_ENTERPRISE**, **SQLSERVER_2017_EXPRESS**, or
  // **SQLSERVER_2017_WEB**.
  SqlDatabaseVersion database_version = 31;

  // **SECOND_GEN**: Cloud SQL database instance.
  // **EXTERNAL**: A database server that is not managed by Google.
  // This property is read-only; use the **tier** property in the **settings**
  // object to determine the database type.
  SqlBackendType backend_type = 32;
}

// Ephemeral certificate creation request.
message GenerateEphemeralCertRequest {
  // Cloud SQL instance ID. This does not include the project ID.
  string instance = 1;

  // Project ID of the project that contains the instance.
  string project = 2;

  // PEM encoded public key to include in the signed certificate.
  string public_key = 3;

  // Optional. Access token to include in the signed certificate.
  string access_token = 4 [(google.api.field_behavior) = OPTIONAL];

  // Optional. Optional snapshot read timestamp to trade freshness for performance.
  google.protobuf.Timestamp read_time = 7 [(google.api.field_behavior) = OPTIONAL];
}

// Ephemeral certificate creation request.
message GenerateEphemeralCertResponse {
  // Generated cert
  SslCert ephemeral_cert = 1;
}