#ifndef TDESTRINGMATCHER_H
#define TDESTRINGMATCHER_H

#include "tdelibs_export.h"

#include <tqobject.h>
#include <tqvaluevector.h>

#define TSMTRACE kdWarning() << "<TSMTRACE> "

// Use horizontal tab as m_patternString separator
inline constexpr char PatternStringDivider = '\t' ;


/**
 *  Generic string matcher class.
 */
class TDECORE_EXPORT TDEStringMatcher : public TQObject
{
Q_OBJECT
public:

  /**
   *  Enumeration defining types of patterns to be matched
  */
  enum class PatternType: uchar
  {
    REGEX,
    WILDCARD,
    SUBSTRING,
    //OTHER,
    DEFAULT = REGEX
  };

  /**
   *  Enumeration defining special handling of alphanumeric characters
   */
  enum class ANCHandling: uchar
  {
    CASE_SENSITIVE    = 0, // No handling, each character distinct
    CASE_INSENSITIVE  = 1, // Alphabetic case variants are same
    EQUIVALENCE       = 2, // Alphanumeric equivalents are same
    DEFAULT = CASE_SENSITIVE
  };

  /**
   *  Structure representing properties of a single match specification.
   */
  struct MatchSpec
  {
    PatternType      patternType;
    ANCHandling      ancHandling;
    bool             expectMatch; // "matching" vs. "not matching"
    TQString         pattern;
  };

  /**
   *  Container representing multiple match specifications.
   */
  typedef TQValueVector<MatchSpec> MatchSpecList;


  TDEStringMatcher();
  ~TDEStringMatcher();

  /**
      @return list of currently defined match specifications.
   */
  const MatchSpecList getMatchSpecs() const;

  /**
      @return string encoding list of currently defined match specifications.
   */
  const TQString getMatchSpecString() const;

  /**
      Use @param newMatchSpecList to generate the internal list of match
      specifications to be used for pattern matching.
   */
  bool setMatchSpecs( MatchSpecList newMatchSpecList );

  /**
      Use specially encoded @param newPatternString to generate the internal
      list of match specifications to be used for pattern matching. Refer
      to file README.tdestringmatcher in tdelibs/tdecore source code for
      more information on how the input string should be formatted.
   */
  bool setMatchSpecs( TQString newMatchSpecString );

  /**
      @return whether or not @param stringToMatch matches any of
      the current match specifications.
   */
  bool matchAny( const TQString& stringToMatch ) const;

  /**
      @return whether or not @param stringToMatch matches all of
      the current match specifications.
   */
  bool matchAll( const TQString& stringToMatch ) const;

protected:

  /**
      @return a basic regular expression formed by converting the basic
      wildcard expression in @param wildcardPattern.
   */
  TQString wildcardToRegex( const TQString& wildcardPattern );

  /**
      @return a string that is @param basicString with all special regular
      expression characters escaped. Useful for regular expression engines
      that do not support /Q.../E.
  */
  TQString escapeRegexChars( const TQString& basicString );


signals:

  void patternsChanged();

private:

  class TDEStringMatcherPrivate;
  TDEStringMatcherPrivate *d;

};

#endif