// Copyright 2020 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

syntax = "proto3";

package cobalt.local_aggregation;

message GlobalAggregates {
  map<uint32, CustomerAggregates> by_customer_id = 1;
}

message CustomerAggregates {
  map<uint32, ProjectAggregates> by_project_id = 1;
}

message ProjectAggregates {
  map<uint32, MetricAggregate> by_metric_id = 1;
}

message MetricAggregate {
  uint32 version = 1;

  // Map from report_id to ReportAggregate
  map<uint32, ReportAggregate> by_report_id = 2;
}

message ReportAggregate {
  oneof time_period {
    DailyAggregate daily = 1;
    HourlyAggregate hourly = 2;
  }
}

message DailyAggregate {
  // Map from day_index to EventCodeAggregate
  map<uint32, EventCodeAggregate> by_day_index = 1;

  // The last day index this report has generated observations for
  uint32 last_day_index = 2;
}

message HourlyAggregate {
  // Map from hour_id to EventCodeAggregate
  map<uint32, EventCodeAggregate> by_hour_id = 1;

  // The last hour id this report has generated observations for
  uint32 last_hour_id = 2;
}

message EventCodeAggregate {
  // A map from packed event_codes vector to AggregateData
  map<uint32, AggregateData> by_event_code = 1;

  // used for metrics of type STRING only. This list should not exceed string_buffer_max entries per
  // aggregation period
  repeated bytes string_hashes = 2;

  // The first |event_code_buffer_max| packed event vectors which were logged for the time
  // window of this EventCodeAggregate, in order of first arrival.
  repeated uint32 event_vectors = 3;
}

message AggregateData {
  oneof aggregate_data {
    uint32 count = 1;
    bool at_least_once = 2;
    SumAndCount sum_and_count = 3;
    int64 integer_value = 4;
    IntegerValues integer_values = 5;
    IntegerHistogram integer_histogram = 6;
    StringHistogram string_histogram = 7;
  }
}

message SumAndCount {
  int64 sum = 1;
  uint32 count = 2;
}

message IntegerValues {
  repeated int64 value = 1;
}

message IntegerHistogram {
  map<uint32, sint64> histogram = 1;
}

message StringHistogram {
  map<uint32, sint64> histogram = 2;
}