#ifndef IDEAL_CPP_HEADER
#define IDEAL_CPP_HEADER
#include <vector>
#include <singular/Poly.h>
#include <singular/ideals.h>
//base for ideals as well for modules
//doesn't need a destructor, as Polys will destroy itself
template <class poly_type> class IdealBase {
 protected:
  std::vector<poly_type> storage;
 public:
  typedef poly_type value_type;
  typedef typename std::vector<poly_type>::size_type size_type;
  typedef typename std::vector<poly_type>::iterator iterator;
  typedef typename std::vector<poly_type>::difference_type difference_type;
  typedef typename std::vector<poly_type>::allocator_type allocator_type;
 IdealBase(){
 }
  
 IdealBase(iterator first, 
	     iterator last,
	     const typename
	     std::vector<poly_type>::allocator_type& __a = allocator_type()):
   storage(first,last,__a)
   {
   
 }
 ring getRing() const{
  //FIXME: is a hack
  if (size()>0){
    return storage[0].getRing();
  }
  else
  return (ring) NULL;
 }
 poly_type& operator[] (int n){
   return storage[n];
 }
 const poly_type& operator[](int n) const{
   return storage[n];
 }
 void push_back(const poly_type& p){
   storage.push_back(p);
 }
 void push_front(const poly_type& p){
   storage.push_front(p);
 }

 iterator begin(){
   return storage.begin();
 }
 iterator end(){
   return storage.end();
 }
 size_type size() const{
   return storage.size();
 }
 iterator
   insert(iterator __position, const value_type& __x){
   return storage.insert(__position,__x);
 }
 iterator
   erase(iterator __position){
   return storage.erase(__position);
 }
 iterator
   erase(iterator __first, iterator __last){
   return storage.erase(__first,__last);
 }
 void insert(iterator __pos, iterator __first, iterator __last){
   return insert(__pos,__first,__last);
 }

};

class Ideal:
public IdealBase<Poly>{
 public:
  Ideal(){
  }
  Ideal(ideal i, ring r){
    for(int j=0;j<IDELEMS(i);j++){
      storage.push_back(Poly(i->m[j],r));
    }
  }
  Ideal(iterator first, 
	iterator last,
	const allocator_type& __a = allocator_type()):
    IdealBase<Poly>(first,last,__a){
  }
 ideal as_ideal() const{
   //no checks for rings
   int s=size();
   
   if (s==0)
    s=1;
   
   ideal result=idInit(s,1);
   result->m[0]=NULL;
   s=size();
   for(int i=0;i<s;i++){
     result->m[i]=storage[i].as_poly();
   }
   return result;
 }
};
class Module:
public IdealBase<Vector>{
public:
 Module(ideal i, ring r){
    for(int j=0;j<IDELEMS(i);j++){
      storage.push_back(Vector(i->m[j],r));
    }
  }
  ideal as_module() const{
    
   //no checks for rings
        int s=size();
   
        if (s==0)
        s=1;
   
        ideal result=idInit(s,1);
        result->m[0]=NULL;
        s=size();
        for(int i=0;i<s;i++){
            result->m[i]=storage[i].as_poly();

        }
    if (size()==0)
            result->rank=0;
        else
            result->rank=idRankFreeModule(result,storage[0].getRing());
   return result;
    
  }
  Module(iterator first, 
	iterator last,
	const allocator_type& __a = allocator_type()):
    IdealBase<Vector>(first,last,__a){
  }
  Module(){
  }
};
#endif
