//
// Copyright © 2017 Arm Ltd. All rights reserved.
// SPDX-License-Identifier: MIT
//

#pragma once

#include <iostream>
#include <memory>
#include <vector>

namespace armnn
{

class ProfilerImpl;
class BackendId;
class Instrument;
class Event;
struct WorkloadInfo;

class IProfiler
{
public:
    /// Enables/disables profiling for this profiler.
    /// @param [in] enableProfiling A flag that indicates whether profiling should be enabled or not.
    void EnableProfiling(bool enableProfiling);

    /// Checks whether profiling is enabled.
    /// Profiling is disabled by default.
    /// @return true if profiling is enabled, false otherwise.
    bool IsProfilingEnabled();

    /// Analyzes the tracked events and writes the results to the given output stream.
    /// Please refer to the configuration variables in Profiling.cpp to customize the information written.
    /// @param [out] outStream The stream where to write the profiling results to.
    void AnalyzeEventsAndWriteResults(std::ostream& outStream) const;

    /// Print stats for events in JSON Format to the given output stream.
    /// @param [out] outStream The stream where to write the profiling results to.
    void Print(std::ostream& outStream) const;

    /// Print out details of each layer within the network that possesses a descriptor.
    /// Also outputs tensor info. This will be part of the profiling json output
    void EnableNetworkDetailsToStdOut(ProfilingDetailsMethod detailsMethod);

    ~IProfiler();
    IProfiler();

private:

    using InstrumentPtr = std::unique_ptr<Instrument>;

    template<typename DescriptorType>
    void AddLayerDetails(const std::string& name,
                         const DescriptorType& desc,
                         const WorkloadInfo& infos,
                         const profiling::ProfilingGuid guid);

    Event* BeginEvent(const BackendId& backendId,
                      const std::string& label,
                      std::vector<InstrumentPtr>&& instruments,
                      const Optional<profiling::ProfilingGuid>& guid);

    std::unique_ptr<ProfilerImpl> pProfilerImpl;

    friend class ScopedProfilingEvent;

    template<typename DescriptorType>
    friend inline void ProfilingUpdateDescriptions(const std::string& name,
                                                   const DescriptorType& desc,
                                                   const WorkloadInfo& infos,
                                                   const profiling::ProfilingGuid guid);

    // Friend functions for unit testing, see ProfilerTests.cpp.
    friend size_t GetProfilerEventSequenceSize(armnn::IProfiler* profiler);
};

} // namespace armnn