/*
 * Copyright (C) 2005-2019 Centre National d'Etudes Spatiales (CNES)
 *
 * This file is part of Orfeo Toolbox
 *
 *     https://www.orfeo-toolbox.org/
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef otbParserX_h
#define otbParserX_h

#include "itkLightObject.h"
#include "itkObjectFactory.h"

#if defined(__clang__)
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wc++11-extensions"

#if defined(__apple_build_version__) && __apple_build_version__ < 7000053
/* Apple's 3.6.0 based clang doesn't support -Winconsistent-missing-override */
#else
#pragma clang diagnostic ignored "-Winconsistent-missing-override"
#endif

#include "mpParser.h"
#pragma clang diagnostic pop

#else
#include "mpParser.h"
#endif

namespace otb
{

class ParserXImpl;


/** \class ParserX
 * \brief  Definition of the standard floating point parser.
 * Standard implementation of the mathematical expressions parser.
 *
 * \sa BandMathImageFilter
 *
 *
 * \ingroup OTBMathParserX
 */
class ITK_EXPORT ParserX : public itk::LightObject
{
public:
  /** Standard class typedefs. */
  typedef ParserX                       Self;
  typedef itk::LightObject              Superclass;
  typedef itk::SmartPointer<Self>       Pointer;
  typedef itk::SmartPointer<const Self> ConstPointer;

  /** New macro for creation of through a Smart Pointer */
  itkNewMacro(Self);

  /** Run-time type information (and related methods) */
  itkTypeMacro(ParserX, itk::LightObject);

  /** Convenient type definitions */
  typedef ParserX     ParserXType;
  typedef mup::Value  ValueType;
  typedef mup::IValue IValueType;

  /** Set the expression to be parsed */
  virtual void SetExpr(const std::string& Expression);

  /** Trigger the parsing */
  ValueType Eval();

  /** Trigger the parsing but return a const ref */
  const IValueType& EvalRef();

  /** Define a variable */
  void DefineVar(const std::string& sName, ValueType* fVar);

  /** Define a constant */
  // void DefineConst(const std::string &sName, ValueType *fVar);

  /** Clear all the defined variables */
  void ClearVar();

  /** Return the expression to be parsed */
  const std::string& GetExpr() const;

  /** Return the list of variables */
  const mup::var_maptype& GetVar() const;

  /** Return the list of expression variables (only make sense after having set up an expression) */
  const mup::var_maptype& GetExprVar() const;

  /**  Check Expression **/
  bool CheckExpr();

protected:
  ParserX();
  ~ParserX() override;
  void PrintSelf(std::ostream& os, itk::Indent indent) const override;


private:
  ParserX(const Self&) = delete;
  void operator=(const Self&) = delete;

  typedef itk::SmartPointer<ParserXImpl> ParserXImplPtr;
  ParserXImplPtr                         m_InternalParserX;
}; // end class

} // end namespace otb

#endif