/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2; -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef TelemetryScalar_h__
#define TelemetryScalar_h__

#include <stdint.h>
#include "mozilla/TelemetryProcessEnums.h"
#include "mozilla/TelemetryScalarEnums.h"
#include "nsTArray.h"
#include "TelemetryCommon.h"

// This module is internal to Telemetry. It encapsulates Telemetry's
// scalar accumulation and storage logic. It should only be used by
// Telemetry.cpp. These functions should not be used anywhere else.
// For the public interface to Telemetry functionality, see Telemetry.h.

namespace mozilla {
// This is only used for the GeckoView persistence.
class JSONWriter;
namespace Telemetry {
struct ScalarAction;
struct KeyedScalarAction;
struct DiscardedData;
struct DynamicScalarDefinition;
}  // namespace Telemetry
}  // namespace mozilla

namespace TelemetryScalar {

void InitializeGlobalState(bool canRecordBase, bool canRecordExtended);
void DeInitializeGlobalState();

void SetCanRecordBase(bool b);
void SetCanRecordExtended(bool b);

// JS API Endpoints.
nsresult Add(const nsACString& aName, JS::Handle<JS::Value> aVal,
             JSContext* aCx);
nsresult Set(const nsACString& aName, JS::Handle<JS::Value> aVal,
             JSContext* aCx);
nsresult SetMaximum(const nsACString& aName, JS::Handle<JS::Value> aVal,
                    JSContext* aCx);
nsresult CreateSnapshots(unsigned int aDataset, bool aClearScalars,
                         JSContext* aCx, uint8_t optional_argc,
                         JS::MutableHandle<JS::Value> aResult, bool aFilterTest,
                         const nsACString& aStoreName);

// Keyed JS API Endpoints.
nsresult Add(const nsACString& aName, const nsAString& aKey,
             JS::Handle<JS::Value> aVal, JSContext* aCx);
nsresult Set(const nsACString& aName, const nsAString& aKey,
             JS::Handle<JS::Value> aVal, JSContext* aCx);
nsresult SetMaximum(const nsACString& aName, const nsAString& aKey,
                    JS::Handle<JS::Value> aVal, JSContext* aCx);
nsresult CreateKeyedSnapshots(unsigned int aDataset, bool aClearScalars,
                              JSContext* aCx, uint8_t optional_argc,
                              JS::MutableHandle<JS::Value> aResult,
                              bool aFilterTest, const nsACString& aStoreName);

// C++ API Endpoints.
void Add(mozilla::Telemetry::ScalarID aId, uint32_t aValue);
void Set(mozilla::Telemetry::ScalarID aId, uint32_t aValue);
void Set(mozilla::Telemetry::ScalarID aId, const nsAString& aValue);
void Set(mozilla::Telemetry::ScalarID aId, bool aValue);
void SetMaximum(mozilla::Telemetry::ScalarID aId, uint32_t aValue);

// Keyed C++ API Endpoints.
void Add(mozilla::Telemetry::ScalarID aId, const nsAString& aKey,
         uint32_t aValue);
void Set(mozilla::Telemetry::ScalarID aId, const nsAString& aKey,
         uint32_t aValue);
void Set(mozilla::Telemetry::ScalarID aId, const nsAString& aKey, bool aValue);
void SetMaximum(mozilla::Telemetry::ScalarID aId, const nsAString& aKey,
                uint32_t aValue);

nsresult RegisterScalars(const nsACString& aCategoryName,
                         JS::Handle<JS::Value> aScalarData, bool aBuiltin,
                         JSContext* cx);

// Event Summary
void SummarizeEvent(const nsCString& aUniqueEventName,
                    mozilla::Telemetry::ProcessID aProcessType, bool aDynamic);

// Only to be used for testing.
void ClearScalars();

size_t GetMapShallowSizesOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf);
size_t GetScalarSizesOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf);

void UpdateChildData(
    mozilla::Telemetry::ProcessID aProcessType,
    const nsTArray<mozilla::Telemetry::ScalarAction>& aScalarActions);

void UpdateChildKeyedData(
    mozilla::Telemetry::ProcessID aProcessType,
    const nsTArray<mozilla::Telemetry::KeyedScalarAction>& aScalarActions);

void RecordDiscardedData(
    mozilla::Telemetry::ProcessID aProcessType,
    const mozilla::Telemetry::DiscardedData& aDiscardedData);

void GetDynamicScalarDefinitions(
    nsTArray<mozilla::Telemetry::DynamicScalarDefinition>&);
void AddDynamicScalarDefinitions(
    const nsTArray<mozilla::Telemetry::DynamicScalarDefinition>&);

/**
 * Append the list of registered stores to the given set.
 * This includes dynamic stores.
 */
nsresult GetAllStores(mozilla::Telemetry::Common::StringHashSet& set);

// They are responsible for updating in-memory probes with the data persisted
// on the disk and vice-versa.
nsresult SerializeScalars(mozilla::JSONWriter& aWriter);
nsresult SerializeKeyedScalars(mozilla::JSONWriter& aWriter);
nsresult DeserializePersistedScalars(JSContext* aCx,
                                     JS::Handle<JS::Value> aData);
nsresult DeserializePersistedKeyedScalars(JSContext* aCx,
                                          JS::Handle<JS::Value> aData);
// Mark deserialization as in progress.
// After this, all scalar operations are recorded into the pending operations
// list.
void DeserializationStarted();
// Apply all operations from the pending operations list and mark
// deserialization finished afterwards.
void ApplyPendingOperations();
}  // namespace TelemetryScalar

#endif  // TelemetryScalar_h__