#pragma region CPL License
/*
Nuclex Native Framework
Copyright (C) 2002-2013 Nuclex Development Labs

This library is free software; you can redistribute it and/or
modify it under the terms of the IBM Common Public License as
published by the IBM Corporation; either version 1.0 of the
License, or (at your option) any later version.

This library 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
IBM Common Public License for more details.

You should have received a copy of the IBM Common Public
License along with this library
*/
#pragma endregion // CPL License

#ifndef NUCLEX_STORAGE_FILESYSTEM_WINRTPATHFORMAT_H
#define NUCLEX_STORAGE_FILESYSTEM_WINRTPATHFORMAT_H

#include "Nuclex/Storage/Config.h"

#if defined(NUCLEX_STORAGE_WINRT)

#include <string>
#include <cctype>

namespace Nuclex { namespace Storage { namespace FileSystem {

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

  /// <summary>Defines the path format used on Windows-based systems</summary>
  class WinRTPathFormat {

    /// <summary>The preferred path separator of this platform</summary>
    public: static const char PathSeparator;

    /// <summary>Whether this platform has a current working directory</summary>
    public: static const bool HasCurrentWorkingDirectory;

    /// <summary>Determines if the specified character is a path separator</summary>
    /// <param name="character">Character that will be checked for being a path separator</param>
    /// <returns>True if the specified character is a path separator</returns>
    public: static bool IsPathSeparator(char character) {
      return (character == '\\') || (character == '/');
    }

    /// <summary>Determines whether the path contains a windows drive letter</summary>
    /// <param name="path">Path that will be checked</param>
    /// <returns>True if the path contains a drive letter</returns>
    /// <remarks>
    ///   This is just here to support Windows' confusing drive letter and working
    ///   directory interaction. All other systems should simply return false.
    /// </remarks>
    public: static bool ContainsDriveLetter(const std::string &path) {
      if(path.length() > 1) {
        return (path[1] == ':');
      }

      return false;
    }

    /// <summary>Throws an exception since there is no current working directory</summary>
    /// <returns>Nothing; an exception is thrown in any case</returns>
    public: static std::string GetCurrentWorkingDirectory();

    /// <summary>Determines if the specified path is an absolute path</summary>
    /// <param name="path">Path that will be checked</param>
    /// <returns>True if the specified path is an absolute path</returns>
    public: static bool IsAbsolutePath(const std::string &path) {
      return (GetAbsolutePathPrefixLength(path) > 0);
    }

    /// <summary>Determines the length of the absolute path prefix in the path</summary>
    /// <param name="path">
    ///   Path in which the length of the absolute path prefix will be determined
    /// </param>
    /// <returns>The length of the absolute path prefix in the specified path</returns>
    /// <remarks>
    ///   <para>
    ///     This returns the number of characters that qualify the specified path as
    ///     an absolute path. The path "C:\dos\x" would for example return 3 since both
    ///     the drive letter and the backslash are required. "\\server\\dir\\file.txt"
    ///     would return 2 since only the double backslash is required to build
    ///     a UNC path. "X:myfile" would also be considered absolute and return 2.
    ///     "mooh" returns 0 since it is relative.
    ///   </para>
    ///   <para>
    ///     We do not handle the length extender (\\?\) here because that detail should never
    ///     bleed into the public API. Even the GetNativePath() methods should not return
    ///     this stuff (you wouldn't expect your Explorer to show \\?\... in the address bar).
    ///     Instead, API wrappers could be made to check the path's length and preprend
    ///     the length extender if necessary.
    ///   </para>
    /// </remarks>
    public: static std::size_t GetAbsolutePathPrefixLength(const std::string &path);

  };

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

}}} // namespace Nuclex::Storage::FileSystem

#endif // defined(NUCLEX_STORAGE_WINRT)
#endif // NUCLEX_STORAGE_FILESYSTEM_WINRTPATHFORMAT_H