// Copyright 2018 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.

#include "src/logger/internal_metrics.h"

#include <cstdint>
#include <memory>
#include <sstream>
#include <utility>

#include "src/logger/internal_metrics_config.cb.h"
#include "src/logging.h"
#include "src/public/lib/registry_identifiers.h"

namespace cobalt::logger {
namespace {
const std::map<std::string, uint32_t> project_map = {
    {"2147483647/205836624", 1},
    {"1/929352809", 2},
    {"1/657579885", 3},
    {"1/7", 4},
    {"1/2322225253", 5},
    {"1/4", 6},
    {"1/5", 7},
    {"1/3708719327", 8},
    {"1/4228153068", 9},
    {"1/2", 10},
    {"1/2820332838", 11},
    {"1/1334068210", 12},
    {"1/3676913920", 13},
    {"1/285903809", 14},
    {"1/3142410971", 15},
    {"1/3509424520", 16},
    {"1/2165403525", 17},
    {"1/1", 18},
    {"1/3", 19},
    {"1/2550112954", 20},
    {"1/4247972873", 21},
    {"1/6", 22},
    {"1/8", 23},
    {"1/9", 24},
    {"1/10", 25},
    {"1/11", 26},
    {"1/12", 27},
    {"1/13", 28},
    {"1/14", 29},
    {"1/15", 30},
    {"1/16", 31},
};

uint32_t GetProjectEventCode(const std::string& project_identifier) {
  auto event_code = project_map.find(project_identifier);
  if (event_code != project_map.end()) {
    return event_code->second;
  }
  return 0;
}
}  // namespace

std::unique_ptr<InternalMetrics> InternalMetrics::NewWithLogger(LoggerInterface* logger,
                                                                DiagnosticsInterface* diagnostics) {
  if (logger) {
    return std::make_unique<InternalMetricsImpl>(logger, diagnostics);
  }
  return std::make_unique<NoOpInternalMetrics>();
}

InternalMetricsImpl::InternalMetricsImpl(LoggerInterface* logger, DiagnosticsInterface* diagnostics)
    : logger_(logger), diagnostics_(diagnostics) {
  CHECK(logger_);
}

void InternalMetricsImpl::LoggerCalled(
    PerProjectLoggerCallsMadeMigratedMetricDimensionLoggerMethod method, const Project& project) {
  fields_.lock()->queued_lambdas.emplace_back([this, method, project] {
    auto status = logger_->LogOccurrence(kLoggerCallsMadeMigratedMetricId, 1, {method});

    if (!status.ok()) {
      VLOG(1) << "InternalMetricsImpl::LoggerCalled: LogOccurrence() returned status=" << status;
    }

    std::ostringstream component;
    component << project.customer_id() << '/' << project.project_id();
    status = logger_->LogOccurrence(kPerProjectLoggerCallsMadeMigratedMetricId, 1,
                                    {GetProjectEventCode(component.str()), method});

    if (!status.ok()) {
      VLOG(1) << "InternalMetricsImpl::LoggerCalled: LogOccurrence() returned status=" << status;
    }

    if (diagnostics_ != nullptr) {
      diagnostics_->LoggerCalled(method, component.str());
    }
  });
}

void InternalMetricsImpl::BytesUploaded(BytesUploadedMetricDimensionStatus upload_status,
                                        size_t byte_count) {
  fields_.lock()->queued_lambdas.emplace_back([this, upload_status, byte_count] {
    Status status = logger_->LogOccurrence(kBytesUploadedMetricId,
                                           static_cast<uint64_t>(byte_count), {upload_status});

    if (!status.ok()) {
      VLOG(1) << "InternalMetricsImpl::BytesUploaded: LogOccurrence() returned "
              << "status=" << status;
    }
  });
}

void InternalMetricsImpl::BytesUploaded(
    PerProjectBytesUploadedMigratedMetricDimensionStatus upload_status, size_t byte_count,
    const lib::ProjectIdentifier& project_identifier) {
  fields_.lock()->queued_lambdas.emplace_back(
      [this, upload_status, byte_count, project_identifier] {
        std::ostringstream component;
        component << project_identifier.customer_id() << '/' << project_identifier.project_id();

        auto status = logger_->LogInteger(kPerProjectBytesUploadedMigratedMetricId,
                                          static_cast<int64_t>(byte_count),
                                          {GetProjectEventCode(component.str()), upload_status});

        if (!status.ok()) {
          VLOG(1) << "InternalMetricsImpl::BytesUploaded: LogInteger() returned "
                  << "status=" << status;
        }
      });
}

void InternalMetricsImpl::BytesStored(
    PerProjectBytesStoredMigratedMetricDimensionStatus upload_status, size_t byte_count,
    const lib::ProjectIdentifier& project_identifier) {
  fields_.lock()->queued_lambdas.emplace_back(
      [this, upload_status, byte_count, project_identifier] {
        std::ostringstream component;
        component << project_identifier.customer_id() << '/' << project_identifier.project_id();

        auto status = logger_->LogInteger(kPerProjectBytesStoredMigratedMetricId,
                                          static_cast<int64_t>(byte_count),
                                          {GetProjectEventCode(component.str()), upload_status});

        if (!status.ok()) {
          VLOG(1) << "InternalMetricsImpl::BytesStored: LogInteger() returned status=" << status;
        }
      });
}

void InternalMetricsImpl::IdleObservationUpload(
    IdleObservationUploadMigratedMetricDimensionDeviceState state) {
  fields_.lock()->queued_lambdas.emplace_back([this, state] {
    auto status = logger_->LogOccurrence(kIdleObservationUploadMigratedMetricId, 1, {state});
    if (!status.ok()) {
      VLOG(1) << "InternalMetricsImpl::IdleObservationUpload: LogOccurrence() returned status="
              << status;
    }
  });
}

void InternalMetricsImpl::InaccurateClockEventsCached(int64_t event_count) {
  fields_.lock()->queued_lambdas.emplace_back([this, event_count] {
    auto status =
        logger_->LogOccurrence(kInaccurateClockEventsCachedMigratedMetricId, event_count, {});

    if (!status.ok()) {
      VLOG(1)
          << "InternalMetricsImpl::InaccurateClockEventsCached: LogOccurrence() returned status="
          << status;
    }
  });
}

void InternalMetricsImpl::InaccurateClockEventsDropped(int64_t event_count) {
  fields_.lock()->queued_lambdas.emplace_back([this, event_count] {
    auto status =
        logger_->LogOccurrence(kInaccurateClockEventsDroppedMigratedMetricId, event_count, {});

    if (!status.ok()) {
      VLOG(1)
          << "InternalMetricsImpl::InaccurateClockEventsDropped: LogOccurrence() returned status="
          << status;
    }
  });
}

void InternalMetricsImpl::SetSoftwareDistributionInfoCalled(
    SetSoftwareDistributionInfoCalledMigratedEventCodes event_codes) {
  fields_.lock()->queued_lambdas.emplace_back([this, event_codes] {
    auto status = logger_->LogOccurrence(kSetSoftwareDistributionInfoCalledMigratedMetricId, 1,
                                         event_codes.ToVector());

    if (!status.ok()) {
      VLOG(1) << "InternalMetricsImpl::SetSoftwareDistributionInfoCalled: LogOccurrence() returned "
                 "status="
              << status;
    }
  });
}

const float kPerMilleMultiplier = 1000.0;
void InternalMetricsImpl::TrackDiskUsage(StorageClass storage_class, size_t bytes,
                                         int64_t max_bytes) {
  fields_.lock()->queued_lambdas.emplace_back([this, storage_class, bytes, max_bytes] {
    // N.B. This method may only include Cobalt 1.1 metrics. Using Cobalt 1.0 metrics here have the
    // potential to cause logging loops.
    auto status =
        logger_->LogInteger(kStoreUsageMetricId, static_cast<int64_t>(bytes), {storage_class});
    if (!status.ok()) {
      VLOG(1) << "InternalMetricsImpl::TrackDiskUsage: LogInteger(disk_usage) returned status="
              << status;
    }

    if (max_bytes >= 0) {
      auto fullness_per_mille = static_cast<uint32_t>(
          (static_cast<float>(bytes) / static_cast<float>(max_bytes)) * kPerMilleMultiplier);
      status = logger_->LogInteger(kStoreFullnessMetricId, fullness_per_mille, {storage_class});
      if (!status.ok()) {
        VLOG(1) << "InternalMetricsImpl::TrackDiskUsage: LogInteger(disk_fullness) returned status="
                << status;
      }
    }

    if (diagnostics_ != nullptr) {
      diagnostics_->TrackDiskUsage(storage_class, static_cast<int64_t>(bytes), max_bytes);
    }
  });
}

void InternalMetricsImpl::Flush() {
  std::vector<std::function<void()>> queued;
  fields_.lock()->queued_lambdas.swap(queued);

  for (const auto& task : queued) {
    task();
  }
}

}  // namespace cobalt::logger