log.h

// SPDX-License-Identifier: MIT
// SPDX-FileCopyrightText: 2025-2026 Manuel Osorio
#pragma once
 
#include <format>
#include <string_view>
#include <utility>
 
namespace Flint {
 
  enum class LOG_LEVEL {
    Trace,
    Debug,
    Info,
    Warn,
    Error,
    Critical,
    Off
  };
 
  enum class LOG_CHANNEL {
    Engine,
    Application
  };
 
  class Log {
    public:
      static void init(std::string_view applicationName, LOG_LEVEL engineLevel,
                       LOG_LEVEL applicationLevel);
 
      [[nodiscard]] static bool isInitialized();
 
      static void setLevel(LOG_CHANNEL channel, LOG_LEVEL level);
 
      template <typename... Args>
      static void engine(LOG_LEVEL level, std::format_string<Args...> format, Args &&...args) {
        if (!shouldLog(LOG_CHANNEL::Engine, level)) {
          return;
        }
 
        write(LOG_CHANNEL::Engine, level, std::format(format, std::forward<Args>(args)...));
      }
 
      template <typename... Args>
      static void application(LOG_LEVEL level, std::format_string<Args...> format, Args &&...args) {
        if (!shouldLog(LOG_CHANNEL::Application, level)) {
          return;
        }
 
        write(LOG_CHANNEL::Application, level, std::format(format, std::forward<Args>(args)...));
      }
 
    private:
      [[nodiscard]] static bool shouldLog(LOG_CHANNEL channel, LOG_LEVEL level);
      static void write(LOG_CHANNEL channel, LOG_LEVEL level, std::string_view message);
  };
 
}
 
#define FLINT_ENGINE_TRACE(...) ::Flint::Log::engine(::Flint::LOG_LEVEL::Trace, __VA_ARGS__)
 
#define FLINT_ENGINE_DEBUG(...) ::Flint::Log::engine(::Flint::LOG_LEVEL::Debug, __VA_ARGS__)
 
#define FLINT_ENGINE_INFO(...) ::Flint::Log::engine(::Flint::LOG_LEVEL::Info, __VA_ARGS__)
 
#define FLINT_ENGINE_WARN(...) ::Flint::Log::engine(::Flint::LOG_LEVEL::Warn, __VA_ARGS__)
 
#define FLINT_ENGINE_ERROR(...) ::Flint::Log::engine(::Flint::LOG_LEVEL::Error, __VA_ARGS__)
 
#define FLINT_ENGINE_CRITICAL(...) ::Flint::Log::engine(::Flint::LOG_LEVEL::Critical, __VA_ARGS__)
 
#define FLINT_APP_TRACE(...) ::Flint::Log::application(::Flint::LOG_LEVEL::Trace, __VA_ARGS__)
 
#define FLINT_APP_DEBUG(...) ::Flint::Log::application(::Flint::LOG_LEVEL::Debug, __VA_ARGS__)
 
#define FLINT_APP_INFO(...) ::Flint::Log::application(::Flint::LOG_LEVEL::Info, __VA_ARGS__)
 
#define FLINT_APP_WARN(...) ::Flint::Log::application(::Flint::LOG_LEVEL::Warn, __VA_ARGS__)
 
#define FLINT_APP_ERROR(...) ::Flint::Log::application(::Flint::LOG_LEVEL::Error, __VA_ARGS__)
 
#define FLINT_APP_CRITICAL(...) ::Flint::Log::application(::Flint::LOG_LEVEL::Critical, __VA_ARGS__)