#ifndef __MOBIUS_IO_FOLDER_H__
#define __MOBIUS_IO_FOLDER_H__

// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
// Mobius Forensic Toolkit
// Copyright (C) 2008,2009,2010,2011,2012,2013,2014,2015,2016,2017,2018 Eduardo Aguiar
//
// This program is free software; you can redistribute it and/or modify it
// under the terms of the GNU General Public License as published by the
// Free Software Foundation; either version 2, or (at your option) any later
// version.
//
// This program is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General
// Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
#include <mobius/io/resource.h>
#include <mobius/io/folder_impl_base.h>

namespace mobius
{
namespace io
{
// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
//! \brief filesystem folder
//! \author Eduardo Aguiar
// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
class folder : public resource
{
public:
  // =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
  //! \brief const iterator
  // =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
  class const_iterator
  {
  public:
    const_iterator () = default;
    const_iterator (const const_iterator&) = default;
    const_iterator (const_iterator&&) = default;
    const resource operator* () const;
    const_iterator& operator++ ();
    const_iterator (std::shared_ptr <folder_impl_base::walker>, const std::string&);

    // =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
    //! \brief postfix increment operator
    //! \param return previous iterator
    // =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
    const_iterator
    operator++ (int)
    {
      const_iterator tmp (*this);
      this->operator++ ();
      return tmp;
    }

    // =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
    //! \brief compare two iterators
    //! \param true/false if iterators are equal
    // =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
    bool
    operator!= (const const_iterator& b)
    {
      return is_valid_ != b.is_valid_ || resource_name_ != b.resource_name_;
    }

  private:
    bool is_valid_ = false;
    std::shared_ptr <folder_impl_base::walker> walker_;
    std::string url_;
    std::string resource_name_;
  };

  // =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
  // folder's methods
  // =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
  folder ();
  explicit folder (const std::string&);
  explicit folder (const resource&);
  folder (const folder&) noexcept = default;
  folder (folder&&) noexcept = default;
  folder& operator=(const folder&) noexcept = default;
  folder& operator=(folder&&) noexcept = default;

  // =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
  //! \brief create iterator to folder's first resource
  //! \return const iterator
  // =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
  const_iterator
  begin () const
  {
    return const_iterator (impl_->new_walker (), get_url ());
  }

  // =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
  //! \brief create iterator pointing after folder's last resource
  //! \return const iterator
  // =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
  const_iterator
  end () const
  {
    return const_iterator ();
  }

private:
  std::shared_ptr <folder_impl_base> impl_;
};

} // namespace io
} // namespace mobius

#endif
