#if !defined(FZYLV_H)
#define FZYLV_H
#include "fzyset.h"

typedef Array1D<FuzzySet> FzySetArray;
/******************************************************************************/
/*                                                                            */
/*  Linguistic Variable class                                                 */
/*                                                                            */
/******************************************************************************/

class LinguisticVariable
{
public:
  FzySetArray FzySet;
  int NbFzyTerm;
  float DomainMax;
  float DomainMin;
  f1D point;
  void Initialize(int nb_terms, float min, float max);
  void Print(ostream &os);
  void SetName(char name[]){Name=name;}
  int FindMaxDegreeFuzzySet(float t);
  float FindFuzzySetValue(int ndx_fzy_set, float t);
  FuzzySet GetFuzzySet(int i);
protected:
  void CreateFuzzySet();
  char *Name;
};


void LinguisticVariable::Initialize(int nb_terms, float min, float max)
{
  NbFzyTerm = nb_terms;
  DomainMax = max;
  DomainMin = min;
  point.Initialize(NbFzyTerm+2);
  FzySet.Initialize(NbFzyTerm);
  float step = (max-min)/float(NbFzyTerm+1);
  point[0]= DomainMin;
  for(int i=1; i<NbFzyTerm+2; i++) point[i] = point[i-1] + step;
  CreateFuzzySet();
  Name=0;
}

void LinguisticVariable::CreateFuzzySet()
{
  for(int i=0;i<NbFzyTerm;i++)
  {
// create left shouder curve
    if(i == 0)FzySet[i].Initialize(point[i],1,point[i+1],1,point[i+2],0);
// create right shouder curve
    else if(i == NbFzyTerm-1)FzySet[i].Initialize(point[i],0,point[i+1],1,point[i+2],1);
// otherwise, create triangular curve
    else FzySet[i].Initialize(point[i],0,point[i+1],1,point[i+2],0);
  }
  for(int i=0;i<NbFzyTerm;i++)FzySet[i].Labeling(i);
}

void LinguisticVariable::Print(ostream &os)
{
  os<<"Linguistic Variable : "<<Name<<endl;
  os<<"There are "<<NbFzyTerm<<" terms(fuzzy set)"<<endl;
  for(int i=0;i<NbFzyTerm;i++)
  {
    FzySet[i].Print(os);
  }
}

int LinguisticVariable::FindMaxDegreeFuzzySet(float t)
{
  int i, ndx;
  float max=-1e20;
  float *d = new float[NbFzyTerm];
  for(int i=0;i<NbFzyTerm;i++)d[i] = FzySet[i].membership(t);
  for(int i=0;i<NbFzyTerm;i++)if(d[i]>max){max=d[i];ndx=i;}
  delete [] d;
  return ndx;
}

float LinguisticVariable::FindFuzzySetValue(int ndx_fzy_set, float t)
{
  float tt = FzySet[ndx_fzy_set].membership(t);
  return tt;
}

FuzzySet LinguisticVariable::GetFuzzySet(int ndx_fzy_set)
{
  FuzzySet fzy;
  fzy.Initialize(FzySet[ndx_fzy_set]);
  return fzy;
}
#endif