Logger.h

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// SPDX-FileCopyrightText: 2026 Valentin Eloy
// SPDX-License-Identifier: GPL-3.0-or-later
 
#pragma once
 
#include <atomic>
#include <memory>
#include <mutex>
#include <string_view>
#include <vector>
 
#include "Core/Diagnostics/ILogSink.h"
#include "Core/Diagnostics/LogLevel.h"

 
namespace core {

class Logger {
public:
    Logger() = default;
 
    Logger(const Logger&) = delete;
    Logger& operator=(const Logger&) = delete;

    void setMinimumLevel(LogLevel level);

    [[nodiscard]] LogLevel minimumLevel() const noexcept {
        return _minimumLevel.load(std::memory_order_relaxed);
    }

    void beginLevelElevation(LogLevel floor);

    void endLevelElevation();

    [[nodiscard]] bool isEnabled(LogLevel level) const;

    void addSink(std::unique_ptr<ILogSink> sink);

    void clearSinks();

    void log(LogLevel level, std::string_view message);
 
private:
    std::atomic<LogLevel> _minimumLevel = LogLevel::Trace;
    std::mutex _elevationMutex;
    int _elevationDepth = 0;
    LogLevel _levelBeforeElevation = LogLevel::Trace;
    std::vector<std::unique_ptr<ILogSink>> _sinks;
};

[[nodiscard]] Logger& defaultLogger();
 
}  // namespace core