message Request {
  enum ConfigFormat {
    CURLY = 0;
    JSON = 1;
  }

  enum OutputFormat {
    OutPlain = 0;
    OutJSON = 1;
  }

  message Prompt {
  }

  message SetupSession {
    required int32 client_pid = 1;
    optional string client_application = 2;
    optional int32 on_behalf_of = 3;
    optional string client_user = 4;
    optional string client_sudo_user = 5;
  }

  message SessionOfPid {
    required int32 client_pid = 1;
  }

  message SessionExists {
    optional int32 dummy = 1;
  }

  message GetConfig {
    optional int32 dummy = 1;
  }

  message Teardown {
    optional int32 on_behalf_of = 1;
  }

  message Validate {
    repeated string Path = 1;
    optional OutputFormat output_format = 2;
  }

  message Set {
    repeated string path = 1;
  }

  message Delete {
    repeated string path = 1;
  }

  message AuxSet {
    repeated string path = 1;
    required string script_name = 2;
    optional string tag_value = 3;
  }

  message AuxDelete {
    repeated string path = 1;
    required string script_name = 2;
    optional string tag_value = 3;
  }

  message Discard {
    optional int32 dummy = 1;
  }

  message SessionChanged {
    optional int32 dummy = 1;
  }

  message Copy {
    repeated string source = 1;
    repeated string destination = 2;
  }

  message Rename {
    repeated string source = 1;
    repeated string destination = 2;
  }

  message Comment {
    repeated string path = 1;
    required string comment = 2;
  }

  message Commit {
    optional bool confirm = 1;
    optional int32 confirm_timeout = 2;
    optional string comment = 3;
    optional bool dry_run = 4;
  }

  message Rollback {
    required int32 revision = 1;
  }

  message Load {
    required string location = 1;
    required bool cached = 2;
    optional ConfigFormat format = 3;
  }

  message Merge {
    required string location = 1;
    required bool destructive = 2;
    optional ConfigFormat format = 3;
  }

  message Save {
    required string location = 1;
    optional ConfigFormat format = 2;
  }

  message ShowConfig {
    repeated string path = 1;
    optional ConfigFormat format = 2;
  }

  message Exists {
    repeated string path = 1;
  }

  message GetValue {
    repeated string path = 1;
    optional OutputFormat output_format = 2;
  }

  message GetValues {
    repeated string path = 1;
    optional OutputFormat output_format = 2;
  }

  message ListChildren {
    repeated string path = 1;
    optional OutputFormat output_format = 2;
  }

  message RunOpMode {
    repeated string path = 1;
    optional OutputFormat output_format = 2;
  }

  message Confirm {
  }

  message EnterConfigurationMode {
    required bool exclusive = 1;
    required bool override_exclusive = 2;
  }

  message ExitConfigurationMode {
  }

  message ReloadReftree {
    // this is a temporary workaround for a bug with empty messages, and
    // will be removed when the issue is resolved
    optional int32 on_behalf_of = 1;
  }

  message ShowSessions {
    required bool exclude_self = 1;
    required bool exclude_other = 2;
  }

  message SetEditLevel {
    repeated string path = 1;
  }

  message SetEditLevelUp {
    optional int32 dummy = 1;
  }

  message ResetEditLevel {
    optional int32 dummy = 1;
  }

  message GetEditLevel {
    optional int32 dummy = 1;
  }

  message EditLevelRoot {
    optional int32 dummy = 1;
  }

  message ConfigUnsaved {
    optional string file = 1;
  }

  message ReferencePathExists {
    repeated string path = 1;
  }

  message GetPathType {
    repeated string path = 1;
    required bool legacy_format = 2;
  }

  message GetCompletionEnv {
    repeated string path = 1;
    required bool legacy_format = 2;
  }

  oneof msg {
    Prompt prompt = 1;
    SetupSession setup_session = 2;
    Set set = 3;
    Delete delete = 4;
    Rename rename = 5;
    Copy copy = 6;
    Comment comment = 7;
    Commit commit = 8;
    Rollback rollback = 9;
    Merge merge = 10;
    Save save = 11;
    ShowConfig show_config = 12;
    Exists exists = 13;
    GetValue get_value = 14;
    GetValues get_values = 15;
    ListChildren list_children = 16;
    RunOpMode run_op_mode = 17;
    Confirm confirm = 18;
    EnterConfigurationMode enter_configuration_mode = 19;
    ExitConfigurationMode exit_configuration_mode = 20;
    Validate validate = 21;
    Teardown teardown = 22;
    ReloadReftree reload_reftree = 23;
    Load load = 24;
    Discard discard = 25;
    SessionChanged session_changed = 26;
    SessionOfPid session_of_pid = 27;
    SessionExists session_exists = 28;
    GetConfig get_config = 29;
    AuxSet aux_set = 30;
    AuxDelete aux_delete = 31;
    ShowSessions show_sessions = 32;
    SetEditLevel set_edit_level = 33;
    SetEditLevelUp set_edit_level_up = 34;
    ResetEditLevel reset_edit_level = 35;
    GetEditLevel get_edit_level = 36;
    EditLevelRoot edit_level_root = 37;
    ConfigUnsaved config_unsaved = 38;
    ReferencePathExists reference_path_exists = 39;
    GetPathType get_path_type = 40;
    GetCompletionEnv get_completion_env = 41;
  }
}

message RequestEnvelope {
    optional string token = 1;
    required Request request = 2;
}

enum Errnum {
  SUCCESS = 0;
  FAIL = 1;
  INVALID_PATH = 2;
  INVALID_VALUE = 3;
  COMMIT_IN_PROGRESS = 4;
  CONFIGURATION_LOCKED = 5;
  INTERNAL_ERROR = 6;
  PERMISSION_DENIED = 7;
  PATH_ALREADY_EXISTS = 8;
  UNCOMMITED_CHANGES = 9;
}

message Response {
  required Errnum status = 1;
  optional string output = 2;
  optional string error = 3;
  optional string warning = 4;
}