#pragma once
#ifndef REAL_BUILD
# include "externals.hh"
#endif


/*= T_FilesWatcher / T_WatchedFiles ==========================================*/

struct T_FilesWatcher;
struct T_WatchedFiles;
using F_OnFileChanges = std::function< void( void ) >;

struct T_FilesWatcher
{
	friend struct T_WatchedFiles;

	T_FilesWatcher( T_FilesWatcher const& ) = delete;

	T_FilesWatcher( );
	T_FilesWatcher( T_FilesWatcher&& ) noexcept;
	~T_FilesWatcher( );

	void check( );

    private:
	int fd;
	std::vector< T_WatchedFiles* > watched;
};

/*----------------------------------------------------------------------------*/

struct T_WatchedFiles
{
	friend struct T_FilesWatcher;

	T_WatchedFiles( ) = delete;
	T_WatchedFiles( T_WatchedFiles const& ) = delete;

	T_WatchedFiles( T_WatchedFiles&& ) noexcept;
	T_WatchedFiles(
			__rw__ T_FilesWatcher& watcher ,
			__rd__ const F_OnFileChanges callback );

	~T_WatchedFiles( );

	void clear( );
	bool watch( __rd__ std::string const& file );

    private:
	T_FilesWatcher* watcher;
	const F_OnFileChanges callback;
	bool triggered;
	std::vector< int > identifiers;
};
using P_WatchedFiles = std::unique_ptr< T_WatchedFiles >;