// Copyright 2019 Google LLC.
//
// 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 google.monitoring.v3;

import "google/api/distribution.proto";
import "google/api/label.proto";
import "google/api/metric.proto";
import "google/api/monitored_resource.proto";
import "google/monitoring/v3/common.proto";

option csharp_namespace = "Google.Cloud.Monitoring.V3";
option go_package = "google.golang.org/genproto/googleapis/monitoring/v3;monitoring";
option java_multiple_files = true;
option java_outer_classname = "MetricProto";
option java_package = "com.google.monitoring.v3";
option php_namespace = "Google\\Cloud\\Monitoring\\V3";

// A single data point in a time series.
message Point {
  // The time interval to which the data point applies.  For `GAUGE` metrics,
  // the start time is optional, but if it is supplied, it must equal the end
  // time.  For `DELTA` metrics, the start and end time should specify a
  // non-zero interval, with subsequent points specifying contiguous and
  // non-overlapping intervals.  For `CUMULATIVE` metrics, the start and end
  // time should specify a non-zero interval, with subsequent points specifying
  // the same start time and increasing end times, until an event resets the
  // cumulative value to zero and sets a new start time for the following
  // points.
  TimeInterval interval = 1;

  // The value of the data point.
  TypedValue value = 2;
}

// A collection of data points that describes the time-varying values
// of a metric. A time series is identified by a combination of a
// fully-specified monitored resource and a fully-specified metric.
// This type is used for both listing and creating time series.
message TimeSeries {
  // The associated metric. A fully-specified metric used to identify the time
  // series.
  google.api.Metric metric = 1;

  // The associated monitored resource.  Custom metrics can use only certain
  // monitored resource types in their time series data.
  google.api.MonitoredResource resource = 2;

  // Output only. The associated monitored resource metadata. When reading a
  // a timeseries, this field will include metadata labels that are explicitly
  // named in the reduction. When creating a timeseries, this field is ignored.
  google.api.MonitoredResourceMetadata metadata = 7;

  // The metric kind of the time series. When listing time series, this metric
  // kind might be different from the metric kind of the associated metric if
  // this time series is an alignment or reduction of other time series.
  //
  // When creating a time series, this field is optional. If present, it must be
  // the same as the metric kind of the associated metric. If the associated
  // metric's descriptor must be auto-created, then this field specifies the
  // metric kind of the new descriptor and must be either `GAUGE` (the default)
  // or `CUMULATIVE`.
  google.api.MetricDescriptor.MetricKind metric_kind = 3;

  // The value type of the time series. When listing time series, this value
  // type might be different from the value type of the associated metric if
  // this time series is an alignment or reduction of other time series.
  //
  // When creating a time series, this field is optional. If present, it must be
  // the same as the type of the data in the `points` field.
  google.api.MetricDescriptor.ValueType value_type = 4;

  // The data points of this time series. When listing time series, points are
  // returned in reverse time order.
  //
  // When creating a time series, this field must contain exactly one point and
  // the point's type must be the same as the value type of the associated
  // metric. If the associated metric's descriptor must be auto-created, then
  // the value type of the descriptor is determined by the point's type, which
  // must be `BOOL`, `INT64`, `DOUBLE`, or `DISTRIBUTION`.
  repeated Point points = 5;
}