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#ifndef BASE_FILE_VERSION_INFO_H__
#define BASE_FILE_VERSION_INFO_H__

#include <string>

#include "base/basictypes.h"
#include "base/scoped_ptr.h"

// Provides a way to access the version information for a file.
// This is the information you access when you select a file in the Windows
// explorer, right-click select Properties, then click the Version tab.

class FileVersionInfo {
 public:
  // Creates a FileVersionInfo for the specified path. Returns NULL if something
  // goes wrong (typically the file does not exit or cannot be opened). The
  // returned object should be deleted when you are done with it.
  static FileVersionInfo* CreateFileVersionInfo(const std::wstring& file_path);

  // Creates a FileVersionInfo for the current application. Returns NULL in case
  // of error. The returned object should be deleted when you are done with it.
  static FileVersionInfo*
      FileVersionInfo::CreateFileVersionInfoForCurrentModule();

  ~FileVersionInfo();

  // Accessors to the different version properties.
  // Returns an empty string if the property is not found.
  std::wstring company_name();
  std::wstring company_short_name();
  std::wstring product_name();
  std::wstring product_short_name();
  std::wstring internal_name();
  std::wstring product_version();
  std::wstring private_build();
  std::wstring special_build();
  std::wstring comments();
  std::wstring original_filename();
  std::wstring file_description();
  std::wstring file_version();
  std::wstring legal_copyright();
  std::wstring legal_trademarks();
  std::wstring last_change();
  bool is_official_build();

  // Lets you access other properties not covered above.
  bool GetValue(const wchar_t* name, std::wstring* value);

  // Similar to GetValue but returns a wstring (empty string if the property
  // does not exist).
  std::wstring GetStringValue(const wchar_t* name);

  // Get the fixed file info if it exists. Otherwise NULL
  VS_FIXEDFILEINFO* fixed_file_info() { return fixed_file_info_; }

 private:
  FileVersionInfo(void* data, int language, int code_page);

  scoped_ptr_malloc<char> data_;
  int language_;
  int code_page_;
  // This is a pointer into the data_ if it exists. Otherwise NULL.
  VS_FIXEDFILEINFO* fixed_file_info_;

  DISALLOW_EVIL_CONSTRUCTORS(FileVersionInfo);
};

#endif  // BASE_FILE_VERSION_INFO_H__