#include "ins_DB.h"

void InsDB :: Read ()
{
   ifstream in("t.ins") ;
   char buff[80], days[5], course[5] ;
   int len, start, stop, weight, num ;

   in.getline(buff,80);   

   while (buff[0] != '@')
   {
      InsRecord ins(buff);

      in.getline(buff, 80);
      len = sscanf(buff, "%s %i %i %i", days, &start, &stop, &weight);

      while(len != 1)
      {
         ins.AddTimePref(days, start, stop, weight);

         in.getline(buff, 80);
         len = sscanf(buff, "%s %i %i %i", days, &start, &stop, &weight);
      }

      in.getline(buff, 80);
      len = sscanf(buff, "%i %s %i", &weight, course, &num); 

      while(len != 0)
      {
         CourseID id(course, num);
         ins.AddCoursePref(id, weight);

         in.getline(buff, 80);
         len = sscanf(buff, "%i %s %i", &weight, course, &num); 
      }
     
      Add(ins);
      in.getline(buff, 80);   
   } 
}


InsDB :: InsDB () {}


InsDB :: InsDB (const InsDB& i) : GenericDB(i) {} 


InsDB :: ~InsDB () {} 


void InsDB :: Add (const InsName& i)
{
   InsRecord ins_rec(i) ;

   data += ins_rec;
}


void InsDB :: Add (const InsRecord& ins_rec)
{
   data += ins_rec;
}


Boolean InsDB :: Delete (const InsName& i) 
{
   InsRecord* ptr = (InsRecord*)data.ResetCurrent();

   while (ptr != NULL)
   {
      if(ptr->GetName() == i)
      {
         data.DeleteCurrent();
         return TRUE;
      }

      ptr = (InsRecord*)data.ListIter();
   }

   return FALSE;
}


void InsDB :: View (const InsName& i)
{
   InsRecord* ptr = (InsRecord*)data.ResetCurrent();

   while (ptr != NULL)
   {
      if(ptr->GetName() == i)
      {
         ptr->print();
         break;
      } 
  
      ptr = (InsRecord*)data.ListIter();
   }
}


void InsDB :: print () const 
{
   data.print();
}


InsRecord* InsDB :: GetInstructor () 
{
   return (InsRecord*)DBIter();
}


void InsDB :: PickySort () 
{
   InsRecord* cur = (InsRecord*)data.ResetCurrent() ;
   InsRecord* ptr ;
   InsRecord* min ;
 
   while (cur != NULL)
   {
      cur->SetPickyRank();
      cur = (InsRecord*)data.ListIter();
   }

   cur = (InsRecord*)data.ListIter();

   while (cur != NULL)
   {
      ptr = cur;
      min = cur;

      while (ptr != NULL)
      {
         if( (ptr->GetPickyRank()) < (min->GetPickyRank()) ) min = ptr;
         ptr = (InsRecord*)ptr->GetNext();
      }

      if (min != cur)
      {
         ptr = (InsRecord*)min->copy();
         min->operator=(*cur);
         cur->operator=(*ptr);
      }

      cur = (InsRecord*)data.ListIter();
   }
}