// This may look like C code, but it's really -*- C++ -*-

/*

 * Copyright (C) 2008 Emweb bv, Herent, Belgium.

 *

 * See the LICENSE file for terms of use.

 */

#ifndef WMESSAGE_RESOURCES_

#define WMESSAGE_RESOURCES_

#include <string>

#include <vector>

#include <map>

#include <set>

#include <Wt/WFlags.h>

#include <Wt/WMessageResourceBundle.h>

#include <Wt/WDllDefs.h>

#ifdef WT_THREADED

#include <mutex>

#endif

namespace Wt {

class WString;

class WT_API WMessageResources

{

public:

  WMessageResources(const std::string& path, bool loadInMemory = true);

  WMessageResources(const char *builtin);

  void hibernate();

  bool isBuiltin(const char *data) const { return builtin_ == data; }

  const std::string& path() const { return path_; }

  LocalizedString resolveKey(const WLocale& locale, const std::string& key) const;

  LocalizedString resolvePluralKey(const WLocale& locale,

                        const std::string& key,

                        ::uint64_t amount) const;

  static int evalPluralCase(const std::string &expression, ::uint64_t n);

  std::set<std::string> keys(const WLocale& locale) const;

private:

  typedef std::map<std::string, std::vector<std::string> > KeyValuesMap;

  struct Resource {

    KeyValuesMap map_;

    std::string pluralExpression_;

    unsigned pluralCount_;

  };

  typedef std::map<std::string, Resource> ResourceMap;

  bool loadInMemory_;

  std::string path_;

  const char *builtin_;

#ifdef WT_THREADED

  std::mutex resourceMutex_;

#endif

  mutable ResourceMap resources_;

  void load(const WLocale& locale) const;

  LocalizedString resolve(const std::string& locale, const std::string& key) const;

  LocalizedString resolvePlural(const std::string& locale, const std::string& key, ::uint64_t amount) const;

  bool readResourceFile(const std::string& locale, Resource& resource) const;

  bool readResourceStream(std::istream &s, Resource& resource,

                          const std::string &fileName) const;

  std::string findCase(const std::vector<std::string> &cases,

                       std::string pluralExpression,

                       ::uint64_t amount) const;

};

}

#endif // WMESSAGE_RESOURCES_