syntax = "proto3";

package s3gw.control;

option go_package = "git.frostfs.info/TrueCloudLab/frostfs-s3-gw/pkg/service/control";

// `ControlService` provides an interface for internal work with the storage node.
service ControlService {
  // Performs health check of the storage node.
  rpc HealthCheck (HealthCheckRequest) returns (HealthCheckResponse);

  rpc PutPolicies (PutPoliciesRequest) returns (PutPoliciesResponse);

  rpc RemovePolicies (RemovePoliciesRequest) returns (RemovePoliciesResponse);

  rpc GetPolicy (GetPolicyRequest) returns (GetPolicyResponse);

  rpc ListPolicies (ListPoliciesRequest) returns (ListPoliciesResponse);
}

// Signature of some message.
message Signature {
  // Public key used for signing.
  bytes key = 1 [json_name = "key"];

  // Binary signature.
  bytes sign = 2 [json_name = "signature"];
}

// Health check request.
message HealthCheckRequest {
  message Body {
  }

  // Body of health check request message.
  Body body = 1;

  // Body signature.
  Signature signature = 2;
}

// Health check response.
message HealthCheckResponse {
  // Health check response body
  message Body {
    // Health status of storage node application.
    HealthStatus health_status = 1;
  }

  // Body of health check response message.
  Body body = 1;

  Signature signature = 2;
}


// Health status of the storage node application.
enum HealthStatus {
  // Undefined status, default value.
  HEALTH_STATUS_UNDEFINED = 0;

  // Storage node application is starting.
  STARTING = 1;

  // Storage node application is started and serves all services.
  READY = 2;

  // Storage node application is shutting down.
  SHUTTING_DOWN = 3;
}

// Policy target to store chains.
enum PolicyTarget {
  // Undefined target, invalid to use.
  TARGET_UNDEFINED = 0;

  // Container target for bucket policies.
  CONTAINER = 1;

  // Namespace target for namespace policies.
  NAMESPACE = 2;

  // User target for namespace user policies.
  USER = 3;

  // Group target for namespace target policies.
  GROUP = 4;
}

// Put policies request.
message PutPoliciesRequest {
  message ChainData {
    // Policy entity type.
    PolicyTarget target = 1;
    // Policy name.
    string name = 2;
    // Chain rules.
    bytes chain = 3;
  }

  message Body {
    repeated ChainData chainDatas = 1;
  }

  Body body = 1;

  // Body signature.
  Signature signature = 2;
}

// Put policies response.
message PutPoliciesResponse {
  message Body {
  }

  Body body = 1;

  Signature signature = 2;
}

// Remove policies request.
message RemovePoliciesRequest {
  message ChainInfo {
    // Policy entity type.
    PolicyTarget target = 1;
    // Policy name.
    string name = 2;
    // Chain id to remove.
    bytes chainID = 3;
  }

  message Body {
    repeated ChainInfo chainInfos = 1;
  }

  Body body = 1;

  // Body signature.
  Signature signature = 2;
}

// Remove policies response.
message RemovePoliciesResponse {
  message Body {
  }

  Body body = 1;

  Signature signature = 2;
}

// Get policy request.
message GetPolicyRequest {
  message Body {
    // Policy entity type.
    PolicyTarget target = 1;
    // Policy name.
    string name = 2;
    // Chain id to get.
    bytes chainID = 3;
  }

  Body body = 1;

  // Body signature.
  Signature signature = 2;
}

// Get policy response.
message GetPolicyResponse {
  message Body {
    // Chain rules.
    bytes chain = 1;
  }

  Body body = 1;

  Signature signature = 2;
}

// List policies request.
message ListPoliciesRequest {
  message Body {
    // Policy entity type.
    PolicyTarget target = 1;
    // Policy name.
    string name = 2;
  }

  Body body = 1;

  // Body signature.
  Signature signature = 2;
}

// List policies response.
message ListPoliciesResponse {
  message Body {
    // Chain ids.
    repeated bytes chainIDs = 1;
  }

  Body body = 1;

  Signature signature = 2;
}