#pragma once

#include "fs/api/fs_file_system.hpp"

#include "tools/std_hash_fs_path.hpp"

#include <unordered_map>

//------------------------------------------------------------------------------

namespace fs::memory

{

class MemoryFolder;

//------------------------------------------------------------------------------

class MemoryFileSystem final : public FileSystem

{

public:

FilePtr openFile( const Path & _path ) const override;

FilePtr createFile( const Path & _path ) override;

bool isExistFile( const Path & _path ) const override;

void

forEachItem( const Path & _dirPath, ItemCallback _callback ) const override;

Path getCurrentPath() const override;

Path toAbsolute( const Path & _path ) const override;

private:

using FolderPtr = std::shared_ptr< MemoryFolder >;

FolderPtr getRoot( const Path & _path ) const;

MemoryFolder & ensureRoot( const Path & _path );

FolderPtr getFolder( const Path & _path ) const;

MemoryFolder & ensureFolder( const Path & _path );

Path toAbsolutePath( const Path & _path ) const;

private:

using Roots = std::unordered_map< Path, FolderPtr >;

Roots m_roots;

};

//------------------------------------------------------------------------------

}