// Copyright 2017 Prometheus Team
// 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 prometheus;

option go_package = "prompb";

import "gogoproto/gogo.proto";

message Sample {
  double value    = 1;
  int64 timestamp = 2;
}

message TimeSeries {
  repeated Label labels   = 1;
  repeated Sample samples = 2;
}

message Label {
  string name  = 1;
  string value = 2;
}

message Labels {
  repeated Label labels = 1 [(gogoproto.nullable) = false];
}

// Matcher specifies a rule, which can match or set of labels or not.
message LabelMatcher {
  enum Type {
    EQ  = 0;
    NEQ = 1;
    RE  = 2;
    NRE = 3;
  }
  Type type    = 1;
  string name  = 2;
  string value = 3;
}

message ReadHints {
  int64 step_ms = 1; // Query step size in milliseconds.
  string func = 2;   // String representation of surrounding function or aggregation.
}