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 // Created on: 2015-03-15
 // Created by: Danila ULYANOV
 // Copyright (c) 2014 OPEN CASCADE SAS
 //
 // This file is part of Open CASCADE Technology software library.
 //
 // This library is free software; you can redistribute it and/or modify it under
 // the terms of the GNU Lesser General Public License version 2.1 as published
 // by the Free Software Foundation, with special exception defined in the file
 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
 // distribution for complete text of the license and disclaimer of any warranty.
 //
 // Alternatively, this file may be used under the terms of Open CASCADE
 // commercial license or contractual agreement.
 
 #ifndef _ViewerTest_CmdParser_HeaderFile
 #define _ViewerTest_CmdParser_HeaderFile
 
 #include <NCollection_Vec3.hxx>
 #include <Standard_TypeDef.hxx>
 
 #include <map>
 #include <vector>
 #include <set>
 #include <string>
 
 class gp_Vec;
 class gp_Pnt;
 
 //! A key for a command line option used for a ViewerTest_CmdParser work
 typedef std::size_t ViewerTest_CommandOptionKey;
 
 //! A set of keys for command-line options
 typedef std::set<ViewerTest_CommandOptionKey> ViewerTest_CommandOptionKeySet;
 
 //! Command parser.
 class ViewerTest_CmdParser
 {
 public:
   //! The key of the unnamed command option
   static const std::size_t THE_UNNAMED_COMMAND_OPTION_KEY;
 
   //! The key of the help command option
   static const std::size_t THE_HELP_COMMAND_OPTION_KEY;
 
   //! Initializes help option.
   //! @param theDescription the description of the command
   ViewerTest_CmdParser(const std::string& theDescription = std::string());
 
   //! Sets description for command.
   void SetDescription(const std::string& theDescription) { myDescription = theDescription; }
 
   //! Adds option to available option list. Several names may be provided if separated with '|'.
   //! @param theOptionNames the list of possible option names separated with '|'
   //! (the first name is main, the other names are aliases)
   //! @param theOptionDescription the description of the option
   //! @return an access key of the newly added option
   ViewerTest_CommandOptionKey AddOption(const std::string& theOptionNames,
                                         const std::string& theOptionDescription = std::string());
 
   //! Prints help message based on provided command and options descriptions.
   void PrintHelp() const;
 
   //! Parses argument list (skips the command name); assigns local arguments to each option.
   void Parse(int theArgsNb, const char* const* theArgVec);
 
   //! Gets an option name by its access key
   //! @param theOptionKey the access key of the option which name is to be found
   //! @retuan a name of the option with the given access key
   std::string GetOptionNameByKey(ViewerTest_CommandOptionKey theOptionKey) const;
 
   //! Gets a set of used options
   //! @return a set of used options
   ViewerTest_CommandOptionKeySet GetUsedOptions() const;
 
   //! Tests if there were no command line options provided
   //! @return true if no command line options were provided, or false otherwise
   bool HasNoOption() const;
 
   //! Tests if the unnamed command line option was provided
   //! @return true if the unnamed command line option was provided, or false otherwise
   bool HasUnnamedOption() const;
 
   //! Tests if only unnamed command line option was provided
   //! @return true if only unnamed command line option was provided, or false otherwise
   bool HasOnlyUnnamedOption() const;
 
   //! Checks if option was used with given minimal number of arguments.
   //! Prints error message if isFatal flag was set.
   //! @param theOptionName the name of the option to be checked
   //! @param theMandatoryArgsNb the number of mandatory arguments
   //! @param isFatal the flag that controls printing of an error message
   //! @return true if an option was set, or false otherwise
   bool HasOption(const std::string& theOptionName,
                  std::size_t        theMandatoryArgsNb = 0,
                  bool               isFatal            = false) const;
 
   //! Checks if option was used with given minimal number of arguments.
   //! Prints error message if isFatal flag was set.
   //! @param theOptionKey the access key of the option to be checked
   //! @param theMandatoryArgsNb the number of mandatory arguments
   //! @param isFatal the flag that controls printing of an error message
   //! @return true if an option was set, or false otherwise
   bool HasOption(ViewerTest_CommandOptionKey theOptionKey,
                  std::size_t                 theMandatoryArgsNb = 0,
                  bool                        isFatal            = false) const;
 
   //! Gets a number of option arguments
   //! @param theOptionName the name of the option
   //! @return a number of option arguments, or 0 if option was not used
   int GetNumberOfOptionArguments(const std::string& theOptionName) const;
 
   //! Gets a number of option arguments
   //! @param theOptionKey the access key of the option
   //! @return a number of option arguments, or 0 if option was not used
   int GetNumberOfOptionArguments(ViewerTest_CommandOptionKey theOptionKey) const;
 
   //! Accesses local argument of option 'theOptionName' with index 'theArgumentIndex'.
   //! @param theOptionName the name of the option which argument is to be accessed
   //! @param theArgumentIndex the index of an accessed argument
   //! @param theOptionArgument an argument of the option with the given name
   //! @return true if an access was successful, or false otherwise
   bool Arg(const std::string& theOptionName,
            int                theArgumentIndex,
            std::string&       theOptionArgument) const;
 
   //! Accesses a local argument with the index 'theArgumentIndex' of the option with the key
   //! 'theOptionKey'.
   //! @param theOptionKey the access key of the option which argument is to be accessed
   //! @param theArgumentIndex the index of an accessed argument
   //! @param theOptionArgument an argument of the option with the given key
   //! @return true if an access was successful, or false otherwise
   bool Arg(ViewerTest_CommandOptionKey theOptionKey,
            int                         theArgumentIndex,
            std::string&                theOptionArgument) const;
 
   //! Accesses local argument of option 'theOptionName' with index 'theArgumentIndex'.
   //! @param theOptionName the name of the option which argument is to be accessed
   //! @param theArgumentIndex the index of an accessed argument
   //! @return an argument of the option with the given name
   std::string Arg(const std::string& theOptionName, int theArgumentIndex) const;
 
   //! Accesses a local argument with the index 'theArgumentIndex' of the option with the key
   //! 'theOptionKey'.
   //! @param theOptionKey the access key of the option which argument is to be accessed
   //! @param theArgumentIndex the index of an accessed argument
   //! @return an argument of the option with the given key
   std::string Arg(ViewerTest_CommandOptionKey theOptionKey, int theArgumentIndex) const;
 
   // Interprets arguments of option 'theOptionName' as float vector starting with index
   // 'theArgumentIndex'.
   NCollection_Vec3<float> ArgVec3f(const std::string& theOptionName,
                                    const int          theArgumentIndex = 0) const;
 
   // Interprets arguments of option 'theOptionName' as double vector starting with index
   // 'theArgumentIndex'.
   NCollection_Vec3<double> ArgVec3d(const std::string& theOptionName,
                                     const int          theArgumentIndex = 0) const;
 
   // Interprets arguments of option 'theOptionName' as gp vector starting with index
   // 'theArgumentIndex'.
   gp_Vec ArgVec(const std::string& theOptionName, const int theArgumentIndex = 0) const;
 
   // Interprets arguments of option 'theOptionName' as gp vector starting with index
   // 'theArgumentIndex'.
   gp_Pnt ArgPnt(const std::string& theOptionName, const int theArgumentIndex = 0) const;
 
   // Interprets arguments of option 'theOptionName' as double at index 'theArgumentIndex'.
   double ArgDouble(const std::string& theOptionName, const int theArgumentIndex = 0) const;
 
   // Interprets arguments of option 'theOptionName' as float at index 'theArgumentIndex'.
   float ArgFloat(const std::string& theOptionName, const int theArgumentIndex = 0) const;
 
   // Interprets arguments of option 'theOptionName' as integer at index 'theArgumentIndex'.
   int ArgInt(const std::string& theOptionName, const int theArgumentIndex = 0) const;
 
   // Interprets arguments of option 'theOptionName' as boolean at index 'theArgumentIndex'.
   bool ArgBool(const std::string& theOptionName, const int theArgumentIndex = 0) const;
 
   //! Interprets arguments of the option 'theOptionName' with the index 'theArgumentIndex' as an
   //! RGB(A) color object.
   //! @tparam theColor the type of a resulting RGB(A) color object
   //! @param theOptionName the name of the option which arguments are to be interpreted
   //! @param theArgumentIndex the index of the first argument to be interpreted
   //! (will be promoted to the next argument after the block of interpreted arguments)
   //! @param theColor a color that is an interpretation of argument(s) of the option with the given
   //! name
   //! @return true if an interpretation was successful, or false otherwise
   template <typename TheColor>
   bool ArgColor(const std::string& theOptionName, int& theArgumentIndex, TheColor& theColor) const;
 
   //! Interprets arguments of the option with the key 'theOptionKey' as an RGB(A) color object.
   //! @tparam theColor the type of a resulting RGB(A) color object
   //! @param theOptionKey the access key of the option which arguments are to be interpreted
   //! @param theArgumentIndex the index of the first argument to be interpreted
   //! (will be promoted to the next argument after the block of interpreted arguments)
   //! @param theColor a color that is an interpretation of argument(s) of the option with the given
   //! name
   //! @return true if an interpretation was successful, or false otherwise
   template <typename TheColor>
   bool ArgColor(ViewerTest_CommandOptionKey theOptionKey,
                 int&                        theArgumentIndex,
                 TheColor&                   theColor) const;
 
 private:
   //! A list of aliases to a command option name
   typedef std::vector<std::string> OptionAliases;
 
   //! A map from all possible option names to option access keys
   typedef std::map<std::string, ViewerTest_CommandOptionKey> OptionMap;
 
   //! A map from keys of used options to their indices in the storage
   typedef std::map<ViewerTest_CommandOptionKey, std::size_t> UsedOptionMap;
 
   //! A list of command option arguments
   typedef std::vector<std::string> OptionArguments;
 
   //! A storage of arguments of different command options
   typedef std::vector<OptionArguments> OptionArgumentsStorage;
 
   //! A full description of a command option
   struct CommandOption
   {
     std::string   Name;        //!< A command option name
     OptionAliases Aliases;     //!< A list of aliases to a command option name
     std::string   Description; //!< A text description of a command option
   };
 
   // A storage of command options descriptions
   typedef std::vector<CommandOption> CommandOptionStorage;
 
   // A list of raw string arguments
   typedef std::vector<const char*> RawStringArguments;
 
   //! Description of command.
   std::string myDescription;
 
   //! Container which stores option objects.
   std::vector<CommandOption> myOptionStorage;
 
   //! Map from all possible option names to option access keys (that are indices in myOptionStorage)
   OptionMap myOptionMap;
 
   //! Map from keys of used options to their indices in the option arguments storage
   UsedOptionMap myUsedOptionMap;
 
   //! Container which stores the arguments of all used options
   OptionArgumentsStorage myOptionArgumentStorage;
 
   //! Gets an access key of the option
   //! @param theOptionName the name of the option which key is to be found
   //! @param theOptionKey an access key of the option with the given name
   //! @return true if the given option was found, or false otherwise
   bool findOptionKey(const std::string&           theOptionName,
                      ViewerTest_CommandOptionKey& theOptionKey) const;
 
   //! Gets an index of an option that was used
   //! @param theOptionKey the access key of the used option which index is to be found
   //! @param theUsedOptionIndex an index of the used option with the given access key
   //! @return true if the given option was not found or not used, or false otherwise
   bool findUsedOptionIndex(ViewerTest_CommandOptionKey theOptionKey,
                            std::size_t&                theUsedOptionIndex) const;
 
   //! Gets an index of an option that was used
   //! @param theOptionName the name of the used option which index is to be found
   //! @param theUsedOptionIndex an index of the used option with the given name
   //! @return true if the given option was not found or not used, or false otherwise
   bool findUsedOptionIndex(const std::string& theOptionName, std::size_t& theUsedOptionIndex) const;
 
   //! Adds the option that is used in the passed command line parameters
   //! @param theNewUsedOptionKey the access key of the adding option
   //! @return an index of a newly added option
   std::size_t addUsedOption(ViewerTest_CommandOptionKey theNewUsedOptionKey);
 
   //! Gets an index of an option that was used
   //! @param theOptionName the name of the used option which index is to be found
   //! @param theUsedOptionIndex an index of the used option with the given name
   //! @return true if the given option was not found or not used, or false otherwise
   RawStringArguments getRawStringArguments(std::size_t theUsedOptionIndex) const;
 };
 
 #endif // _ViewerTest_CmdParser_HeaderFile

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