syntax = "proto3";
package prometheus;

option go_package = "prompb";

message WriteRequest {
  repeated prometheus.TimeSeries timeseries = 1;
}

message ReadRequest {
  repeated Query queries = 1;
}

message ReadResponse {
  // In same order as the request's queries.
  repeated QueryResult results = 1;
}

message Query {
  int64 start_timestamp_ms = 1;
  int64 end_timestamp_ms = 2;
  repeated prometheus.LabelMatcher matchers = 3;
  prometheus.ReadHints hints = 4;
}

message QueryResult {
  // Samples within a time series must be ordered by time.
  repeated prometheus.TimeSeries timeseries = 1;
}

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;
}

// 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.
  int64 start_ms = 3; // Start time in milliseconds.
  int64 end_ms = 4;   // End time in milliseconds.
}