// Created on: 1995-03-08
// Created by: Christian CAILLET
// Copyright (c) 1995-1999 Matra Datavision
// Copyright (c) 1999-2014 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 _Interface_MSG_HeaderFile
#define _Interface_MSG_HeaderFile

#include <Standard.hxx>
#include <Standard_DefineAlloc.hxx>
#include <Standard_Handle.hxx>

#include <Standard_PCharacter.hxx>
#include <Standard_Real.hxx>
#include <Standard_IStream.hxx>
#include <Standard_OStream.hxx>

//! This class gives a set of functions to manage and use a list
//! of translated messages (messagery)
//!
//! Keys are strings, their corresponding (i.e. translated) items
//! are strings, managed by a dictionary (a global one).
//!
//! If the dictionary is not set, or if a key is not recorded,
//! the key is returned as item, and it is possible to :
//! - trace or not this fail, record or not it for further trace
//!
//! It is also possible to suspend the translation (keys are then
//! always returned as items)
//!
//! This class also provides a file format for loading :
//! It is made of couples of lines, the first one begins by '@'
//! the following is the key, the second one is the message
//! Lines which are empty or which begin by '@@' are skipped
class Interface_MSG
{
public:
  DEFINE_STANDARD_ALLOC

  //! A MSG is created to write a "functional code" in conjunction
  //! with operator () attached to Value
  //! Then, to have a translated message, write in C++ :
  //!
  //! Interface_MSG("...mykey...") which returns a CString
  //! See also some help which follow
  Standard_EXPORT Interface_MSG(const char* key);

  //! Translates a message which contains one integer variable
  //! It is just a help which avoid the following :
  //! char mess[100]; Sprintf(mess,Interface_MSG("code"),ival);
  //! then AddFail(mess);
  //! replaced by AddFail (Interface_MSG("code",ival));
  //!
  //! The basic message is intended to be in C-Sprintf format,
  //! with one %d form in it
  Standard_EXPORT Interface_MSG(const char* key, const int i1);

  //! Translates a message which contains two integer variables
  //! As for one integer, it is just a writing help
  //!
  //! The basic message is intended to be in C-Sprintf format
  //! with two %d forms in it
  Standard_EXPORT Interface_MSG(const char* key, const int i1, const int i2);

  //! Translates a message which contains one real variable
  //! <intervals> if set, commands the variable to be rounded to an
  //! interval (see below, method Intervals)
  //! As for one integer, it is just a writing help
  //!
  //! The basic message is intended to be in C-Sprintf format
  //! with one %f form (or equivalent : %e etc) in it
  Standard_EXPORT Interface_MSG(const char* key, const double r1, const int intervals = -1);

  //! Translates a message which contains one string variable
  //! As for one integer, it is just a writing help
  //!
  //! The basic message is intended to be in C-Sprintf format
  //! with one %s form in it
  Standard_EXPORT Interface_MSG(const char* key, const char* str);

  //! Translates a message which contains one integer and one
  //! string variables
  //! As for one integer, it is just a writing help
  //! Used for instance to say "Param n0.<ival> i.e. <str> is not.."
  //!
  //! The basic message is intended to be in C-Sprintf format
  //! with one %d then one %s forms in it
  Standard_EXPORT Interface_MSG(const char* key, const int ival, const char* str);

  //! Optimised destructor (applies for additional forms of Create)
  Standard_EXPORT void Destroy();

  ~Interface_MSG() { Destroy(); }

  //! Returns the translated message, in a functional form with
  //! operator ()
  //! was C++ : return const
  Standard_EXPORT const char* Value() const;
  operator const char*() const;

  //! Reads a list of messages from a stream, returns read count
  //! 0 means empty file, -1 means error
  Standard_EXPORT static int Read(Standard_IStream& S);

  //! Reads a list of messages from a file defined by its name
  Standard_EXPORT static int Read(const char* file);

  //! Writes the list of messages recorded to be translated, to a
  //! stream. Writes all the list (Default) or only keys which begin
  //! by <rootkey>. Returns the count of written messages
  Standard_EXPORT static int Write(Standard_OStream& S, const char* rootkey = "");

  //! Returns True if a given message is surely a key
  //! (according to the form adopted for keys)
  //! (before activating messages, answer is false)
  Standard_EXPORT static bool IsKey(const char* mess);

  //! Returns the item recorded for a key.
  //! Returns the key itself if :
  //! - it is not recorded (then, the trace system is activated)
  //! - MSG has been required to be hung on
  Standard_EXPORT static const char* Translated(const char* key);

  //! Fills the dictionary with a couple (key-item)
  //! If a key is already recorded, it is possible to :
  //! - keep the last definition, and activate the trace system
  Standard_EXPORT static void Record(const char* key, const char* item);

  //! Sets the trace system to work when activated, as follow :
  //! - if <toprint>  is True, print immediately on standard output
  //! - if <torecord> is True, record it for further print
  Standard_EXPORT static void SetTrace(const bool toprint, const bool torecord);

  //! Sets the main modes for MSG :
  //! - if <running> is True, translation works normally
  //! - if <running> is False, translated item equate keys
  //! - if <raising> is True, errors (from Record or Translate)
  //! cause MSG to raise an exception
  //! - if <raising> is False, MSG runs without exception, then
  //! see also Trace Modes above
  Standard_EXPORT static void SetMode(const bool running, const bool raising);

  //! Prints the recorded errors (without title; can be empty, this
  //! is the normally expected case)
  Standard_EXPORT static void PrintTrace(Standard_OStream& S);

  //! Returns an "intervalled" value from a starting real <val> :
  //! i.e. a value which is rounded on an interval limit
  //! Interval limits are defined to be in a coarsely "geometric"
  //! progression (two successive intervals are inside a limit ratio)
  //!
  //! <order> gives the count of desired intervals in a range <1-10>
  //! <upper> False, returns the first lower interval (D)
  //! <upper> True,  returns the first upper interval
  //! Values of Intervals according <order> :
  //! 0,1 : 1 10 100 ...
  //! 2   : 1 3 10 30 100 ...
  //! 3(D): 1 2 5 10 20 50 100 ...
  //! 4   : 1 2 3 6 10 20 30 60 100 ...
  //! 6   : 1 1.5 2 3 5 7 10 15 20 ...
  //! 10  : 1 1.2 1.5 2 2.5 3 4 5 6 8 10 12 15 20 25 ...
  Standard_EXPORT static double Intervalled(const double val,
                                            const int    order = 3,
                                            const bool   upper = false);

  //! Codes a date as a text, from its numeric value (-> seconds) :
  //! YYYY-MM-DD:HH-MN-SS fixed format, completed by leading zeros
  //! Another format can be provided, as follows :
  //! C:%d ...   C like format, preceded by C:
  //! S:...      format to call system (not yet implemented)
  Standard_EXPORT static void TDate(const char* text,
                                    const int   yy,
                                    const int   mm,
                                    const int   dd,
                                    const int   hh,
                                    const int   mn,
                                    const int   ss,
                                    const char* format = "");

  //! Decodes a date to numeric integer values
  //! Returns True if OK, False if text does not fit with required
  //! format. Incomplete forms are allowed (for instance, for only
  //! YYYY-MM-DD, hour is zero)
  Standard_EXPORT static bool NDate(const char* text,
                                    int&        yy,
                                    int&        mm,
                                    int&        dd,
                                    int&        hh,
                                    int&        mn,
                                    int&        ss);

  //! Returns a value about comparison of two dates
  //! 0 : equal. <0 text1 anterior. >0 text1 posterior
  Standard_EXPORT static int CDate(const char* text1, const char* text2);

  //! Returns a blank string, of length between 0 and <max>, to fill
  //! the printing of a numeric value <val>, i.e.
  //! If val < 10 , max-1 blanks
  //! If val between 10 and 99, max-2 blanks ... etc...
  Standard_EXPORT static const char* Blanks(const int val, const int max);

  //! Returns a blank string, to complete a given string <val> up to
  //! <max> characters:
  //! If strlen(val) is 0, max blanks
  //! If strlen(val) is 5, max-5 blanks etc...
  Standard_EXPORT static const char* Blanks(const char* val, const int max);

  //! Returns a blank string of <count> blanks (mini 0, maxi 76)
  Standard_EXPORT static const char* Blanks(const int count);

  //! Prints a String on an Output Stream, as follows:
  //! Accompanied with blanks, to give up to <max> chars at all,
  //! justified accordingly:
  //! -1 (D) : left 0 : center 1 : right
  //! Maximum 76 characters
  Standard_EXPORT static void Print(Standard_OStream& S,
                                    const char*       val,
                                    const int         max,
                                    const int         just = -1);

private:
  const char*         thekey;
  Standard_PCharacter theval;
};

#endif // _Interface_MSG_HeaderFile
