//
// Copyright (c) 2003-2006 Greg Landrum and Rational Discovery LLC
//
//   @@ All Rights Reserved @@
//  This file is part of the RDKit.
//  The contents are covered by the terms of the BSD license
//  which is included in the file license.txt, found at the root
//  of the RDKit source tree.
//
#ifndef __RD_EQUALITYQUERY_H__
#define __RD_EQUALITYQUERY_H__
#include "Query.h"
#include <sstream>

namespace Queries {

//! \brief a Query implementing ==: arguments must match a particular
//!  value (within an optional tolerance)
template <typename MatchFuncArgType,
          typename DataFuncArgType = MatchFuncArgType,
          bool needsConversion = false>
class EqualityQuery
    : public Query<MatchFuncArgType, DataFuncArgType, needsConversion> {
 public:
  EqualityQuery() : d_tol(0) { this->df_negate = false; };

  //! constructs with our target value
  explicit EqualityQuery(MatchFuncArgType v) : d_val(v), d_tol(0) {
    this->df_negate = false;
  };

  //! constructs with our target value and a tolerance
  EqualityQuery(MatchFuncArgType v, MatchFuncArgType t) : d_val(v), d_tol(t) {
    this->df_negate = false;
  };

  //! sets our target value
  void setVal(MatchFuncArgType what) { this->d_val = what; };
  //! returns our target value
  const MatchFuncArgType getVal() const { return this->d_val; };

  //! sets our tolerance
  void setTol(MatchFuncArgType what) { this->d_tol = what; };
  //! returns out tolerance
  const MatchFuncArgType getTol() const { return this->d_tol; };

  virtual bool Match(const DataFuncArgType what) const {
    MatchFuncArgType mfArg =
        this->TypeConvert(what, Int2Type<needsConversion>());
    if (queryCmp(this->d_val, mfArg, this->d_tol) == 0) {
      if (this->getNegation()) {
        return false;
      } else {
        return true;
      }
    } else {
      if (this->getNegation()) {
        return true;
      } else {
        return false;
      }
    }
  };

  virtual Query<MatchFuncArgType, DataFuncArgType, needsConversion> *copy()
      const {
    EqualityQuery<MatchFuncArgType, DataFuncArgType, needsConversion> *res =
        new EqualityQuery<MatchFuncArgType, DataFuncArgType, needsConversion>();
    res->setNegation(this->getNegation());
    res->setVal(this->d_val);
    res->setTol(this->d_tol);
    res->setDataFunc(this->d_dataFunc);
    res->d_description = this->d_description;
    return res;
  };

  std::string getFullDescription() const {
    std::ostringstream res;
    res << this->getDescription();
    res << " " << this->d_val;
    if (this->getNegation())
      res << " != ";
    else
      res << " = ";
    res << "val";
    return res.str();
  }

 protected:
  MatchFuncArgType d_val;
  MatchFuncArgType d_tol;
};
}
#endif
