syntax = "proto3";
package core;

enum TelemetryDataType {
    FLOAT_32 = 0;
    FLOAT_64 = 1;
}

message TelemetryValue {
    oneof value {
        float float_32 = 1;
        double float_64 = 2;
    }
}

message UUID {
    string value = 1;
}

// UTC since UNIX
message Timestamp {
    sfixed64 secs = 1;
    sfixed32 nanos = 2;
}

message TelemetryDefinitionRequest {
    string name = 1;
    TelemetryDataType data_type = 2;
}

message TelemetryDefinitionResponse {
    UUID uuid = 1;
}

message TelemetryItem {
    UUID uuid = 1;
    TelemetryValue value = 2;
    Timestamp timestamp = 3;
}

message TelemetryInsertResponse {
}

service TelemetryService {
    rpc NewTelemetry (TelemetryDefinitionRequest) returns (TelemetryDefinitionResponse);
    rpc InsertTelemetry (stream TelemetryItem) returns (stream TelemetryInsertResponse);
}