#pragma once

#include <iosfwd>

namespace logging {
  class layout;
  struct logpacket;
  class properties;
  enum class level : int;

  struct appender {
    virtual ~appender() = default;
    virtual std::ostream & stream() = 0;
    virtual void write(logpacket const & packet, layout & withLayout) = 0;
    virtual bool should_log(level ll) const = 0;
    virtual void flush() = 0;
  };

  struct simple_appender : appender {
    level threshold;

    simple_appender() = default;
    simple_appender(properties const & props);

    void write(logpacket const & packet, layout & withLayout) override;
    bool should_log(level ll) const override;
    void flush() override;
  };
}