/*
   The MIT License (MIT)

   Copyright (c) 2014 Antonio SJ Musumeci <trapexit@spawn.link>

   Permission is hereby granted, free of charge, to any person obtaining a copy
   of this software and associated documentation files (the "Software"), to deal
   in the Software without restriction, including without limitation the rights
   to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   copies of the Software, and to permit persons to whom the Software is
   furnished to do so, subject to the following conditions:

   The above copyright notice and this permission notice shall be included in
   all copies or substantial portions of the Software.

   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
   AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
   OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
   THE SOFTWARE.
*/

#ifndef __POLICY_HPP__
#define __POLICY_HPP__

#include <string>
#include <map>

#include "fs.hpp"

namespace mergerfs
{
  class Policy
  {
  public:
    struct Enum
    {
      enum Type
        {
          invalid = -1,
          BEGIN   = 0,
          epmfs   = BEGIN,
          ff,
          ffwp,
          mfs,
          newest,
          rand,
          END
        };
    };

  private:
    Enum::Type     _enum;
    std::string    _str;
    fs::SearchFunc _func;

  public:
    Policy()
      : _enum(invalid),
        _str(invalid),
        _func(invalid)
    {
    }

    Policy(const Enum::Type      enum_,
           const std::string    &str_,
           const fs::SearchFunc  func_)
      : _enum(enum_),
        _str(str_),
        _func(func_)
    {
    }

  public:
    operator const Enum::Type() const { return _enum; }
    operator const std::string&() const { return _str; }
    operator const fs::SearchFunc() const { return _func; }
    operator const Policy*() const { return this; }

    bool operator==(const Enum::Type enum_) const
    { return _enum == enum_; }
    bool operator==(const std::string &str_) const
    { return _str == str_; }
    bool operator==(const fs::SearchFunc func_) const
    { return _func == func_; }

    bool operator!=(const Policy &r) const
    { return _enum != r._enum; }

    bool operator<(const Policy &r) const
    { return _enum < r._enum; }

  public:
    static const Policy &find(const std::string&);
    static const Policy &find(const Enum::Type);

  public:
    static const std::vector<Policy>  _policies_;
    static const Policy * const       policies;
    static const Policy              &invalid;
    static const Policy              &epmfs;
    static const Policy              &ff;
    static const Policy              &ffwp;
    static const Policy              &mfs;
    static const Policy              &newest;
    static const Policy              &rand;
  };
}

#endif