#include <kernel/mod2.h>

#include <omalloc/omalloc.h>
#include <coeffs/coeffs.h>
#include <kernel/longrat.h>

#include <kernel/febase.h>

#include <Singular/ipid.h>
#include <Singular/subexpr.h>
#include <Singular/tok.h>
#include <Singular/blackbox.h>
#include <Singular/ipshell.h>

#include <Singular/ipid.h> 
// extern coeffs coeffs_BIGINT


#include "bigintm.h"


#define HAVE_BIGINTM 1

namespace
{

#ifdef HAVE_BIGINTM
static int bigintm_type_id = -1;
#endif

#ifdef HAVE_BIGINTM
static char * bigintm_String(blackbox */*b*/, void *d)
{ if (d==NULL) return omStrDup("oo");
   else
   {
     StringSetS("");
     number n=(number)d; n_Write(n, coeffs_BIGINT); d=(void*)n;
     return StringEndS();
    }
}
static void * bigintm_Copy(blackbox*/*b*/, void *d)
{  number n=(number)d; return n_Copy(n, coeffs_BIGINT); }

static BOOLEAN bigintm_Assign(leftv l, leftv r)
{
  assume( l->Typ() == bigintm_type_id );
  
  // blackbox *ll=getBlackboxStuff(l->Typ());
  
  if (r->Typ()>MAX_TOK)
  {
    if (bigintm_type_id == r->Typ())
    {
      // blackbox *rr=getBlackboxStuff(r->Typ());
      
      if (l->Data()!=NULL) { number n1=(number)l->Data(); n_Delete(&n1,coeffs_BIGINT); }
      number n2=(number)r->CopyD();
      if (l->rtyp==IDHDL)
      {
        IDDATA((idhdl)l->data)=(char *)n2;
      }
      else
      {
        l->data=(void *)n2;
      }
      return FALSE;
    }
    else
    {
      Werror("bigintm_Assign: assign %s (%d) = %s (%d)",
             getBlackboxName(l->Typ()), l->Typ(),
             getBlackboxName(r->Typ()), r->Typ());
      return TRUE;
    }
  }
  else if (r->Typ()==INT_CMD)
  {
    if (l->Data()!=NULL) { number n1=(number)l->Data(); n_Delete(&n1,coeffs_BIGINT); }
    number n2=n_Init((int)(long)r->Data(),coeffs_BIGINT);
    if (l->rtyp==IDHDL)
    {
      IDDATA((idhdl)l->data)=(char *)n2;
    }
    else
    {
      l->data=(void *)n2;
    }
    return FALSE;
  }
  else
    Werror("assign %d = %d",l->Typ(),r->Typ());
  
  return TRUE;
}

BOOLEAN bigintm_Op1(int op,leftv l, leftv r)
{
  // interpreter: a1 is ist bigintm
  assume( r->Typ() == bigintm_type_id );
/*
  // "typeof( <blackbox> )" is handled by 'blackboxDefaultOp1'
  if (op==TYPEOF_CMD)
  {
    l->data=omStrDup(getBlackboxName(r->Typ()));
    l->rtyp=STRING_CMD;
    return FALSE;
  }
*/
  
  if( op=='(' ) // <bigintm>  VAR();
  {
    Werror("bigintm_Op1: What do you mean by '<bigintm>()'?!");
    return TRUE;  
  }

  return blackboxDefaultOp1(op, l, r);
}


static BOOLEAN bigintm_OpM(int op, leftv res, leftv args);


static BOOLEAN bigintm_Op2(int op, leftv res, leftv a1, leftv a2)
{
  // interpreter: a1 is ist bigintm
  assume( a1->Typ() == bigintm_type_id );
  
  // blackbox *a=getBlackboxStuff(a1->Typ());
  number n1=(number)a1->Data(); 
  switch(op)
  {
    case '+':
    {
      if (a2->Typ()==INT_CMD)
      {
        number n2=n_Init((int)(long)a2->Data(), coeffs_BIGINT);
        number n=n_Add(n1,n2, coeffs_BIGINT);
        res->data=(void *)n;
        res->rtyp=a1->Typ();
        return FALSE;
      }
      else if (a2->Typ()==a1->Typ())
      {
        number n2=(number)a2->Data(); 
        number n=n_Add(n1,n2, coeffs_BIGINT);
        res->data=(void *)n;
        res->rtyp=a1->Typ();
        return FALSE;
      }

      Werror("bigintm_Op2: Op: '+': Sorry unsupported 2nd argument-type: %s in", Tok2Cmdname(a2->Typ()));
      return WrongOp("bigintm_Op2", op, a1);
    }

    case '-':
    {
      if (a2->Typ()==INT_CMD)
      {
        number n2=n_Init((int)(long)a2->Data(),coeffs_BIGINT);
        number n=n_Sub(n1,n2, coeffs_BIGINT);
        res->data=(void *)n;
        res->rtyp=a1->Typ();
        return FALSE;
      }
      else if (a2->Typ()==a1->Typ())
      {
        number n2=(number)a2->Data(); 
        number n=n_Sub(n1,n2, coeffs_BIGINT);
        res->data=(void *)n;
        res->rtyp=a1->Typ();
        return FALSE;
      }
      
      Werror("bigintm_Op2: Op: '-': Sorry unsupported 2nd argument-type: %s in", Tok2Cmdname(a2->Typ()));
      WrongOp("bigintm_Op2", op, a1);
      return TRUE;
    }


    case '*':
    {
      if (a2->Typ()==INT_CMD)
      {
        number n2=n_Init((int)(long)a2->Data(), coeffs_BIGINT);
        number n=n_Mult(n1,n2, coeffs_BIGINT);
        res->data=(void *)n;
        res->rtyp=a1->Typ();
        return FALSE;
      }
      else if (a2->Typ()==a1->Typ())
      {
        number n2=(number)a2->Data(); 
        number n=n_Mult(n1,n2, coeffs_BIGINT);
        res->data=(void *)n;
        res->rtyp=a1->Typ();
        return FALSE;
      }
      Werror("bigintm_Op2: Op: '*': Sorry unsupported 2nd argument-type: '%s' in", Tok2Cmdname(a2->Typ()));
      WrongOp("bigintm_Op2", op, a1);
      return TRUE;
    }
/*
    /// TODO: Why is this ignored???!
    case '(' : // <bigintm>  VAR(b);
    {
      Werror("bigintm_Op2: What du you mean by '<bigintm>(...%s...)'?!", Tok2Cmdname(a2->Typ()));
      return TRUE;  
    }
*/
    case EQUAL_EQUAL:
    {
      if( a1 == a2)
      {
        res->data= (void *) (TRUE);
        res->rtyp= INT_CMD;
        return FALSE;
      } else
      if (a2->Typ()==INT_CMD)
      {
        number n2=n_Init((int)(long)a2->Data(), coeffs_BIGINT);
        res->data=(void *) (long) n_Equal(n1,n2, coeffs_BIGINT);
        res->rtyp= INT_CMD;
        return FALSE;
      }
      else if (a2->Typ()==a1->Typ())
      {
        number n2=(number)a2->Data(); 
        res->data=(void *) (long) n_Equal(n1,n2, coeffs_BIGINT);
        res->rtyp= INT_CMD;
        return FALSE;
      }

      Werror("bigintm_Op2: Op: '==': Sorry unsupported 2nd argument-type: '%s' in", Tok2Cmdname(a2->Typ()));
      WrongOp("bigintm_Op2", op, a1);
      return TRUE;
    }

    case '.':
    {

      if (a2->name==NULL)
      {
        Werror("bigintm_Op2: Op: '.': 2nd argument-type: '%s'(%d) should be a NAME", Tok2Cmdname(a2->Typ()), a2->Typ());      
        return TRUE;
      }
      
      Werror("bigintm_Op2: Op: '.': 2nd argument-type: '%s'(%d) is called '%s' in ", Tok2Cmdname(a2->Typ()), a2->Typ(), a2->name);      
      return blackboxDefaultOp2(op,res,a1,a2);
      return TRUE;
    }

    default:
    {
      WrongOp("bigintm_Op2", op, a1);
      return blackboxDefaultOp2(op,res,a1,a2);
      break;
    }
  }
}
// BOOLEAN opM(int op, leftv res, leftv args)
static BOOLEAN bigintm_OpM(int op, leftv res, leftv args)
{
  // interpreter: args->1. arg is ist bigintm
  assume( args->Typ() == bigintm_type_id );
  blackbox *a=getBlackboxStuff(args->Typ());
  switch(op)
  {
    case STRING_CMD:
    {
      res->data=(void *)a->blackbox_String(a,args->Data());
      res->rtyp=STRING_CMD;
      return FALSE;
    }

    /// TODO: Why is this used for ALL the cases: even for "a(1)"  ???!
    case '(' : // <bigintm>  VAR(b,...);
    {
      Werror("bigintm_OpM: What do you mean by '<bigintm>(...)'?!");
      return TRUE;  
    }
    
    default:
      WrongOp("bigintm_OpM", op, args);
      break;
  }
  return blackbox_default_OpM(op, res, args);
}

static void bigintm_destroy(blackbox */*b*/, void *d)
{
  if (d!=NULL)
  {
    number n=(number)d;
    n_Delete(&n, coeffs_BIGINT);
  }
}

#endif

}

// this is only a demo
BOOLEAN bigintm_setup()
{
#ifndef HAVE_BIGINTM
  Werror("bigintm_setup: Sorry BIGINTM was not compiled in!");
  return TRUE; // ok, TRUE = error!
#else

  if( bigintm_type_id == -1 )
  {
    blackbox *b=(blackbox*)omAlloc0(sizeof(blackbox));
    // all undefined entries will be set to default in setBlackboxStuff
    // the default Print is quite usefule,
    // all other are simply error messages
    b->blackbox_destroy=bigintm_destroy;
    b->blackbox_String=bigintm_String;
    //b->blackbox_Print=blackbox_default_Print;
    //b->blackbox_Init=blackbox_default_Init;
    b->blackbox_Copy=bigintm_Copy;
    b->blackbox_Assign=bigintm_Assign; // TO ASK: no default?!
    b->blackbox_Op1=bigintm_Op1;
    b->blackbox_Op2=bigintm_Op2;
    //b->blackbox_Op3=blackbox_default_Op3;
    b->blackbox_OpM=bigintm_OpM;

    bigintm_type_id = setBlackboxStuff(b,"bigintm");

    Print("bigintm_setup: created a blackbox type [%d] '%s'",bigintm_type_id, getBlackboxName(bigintm_type_id));
    PrintLn();

    return FALSE; // ok, TRUE = error!
  } else
  {
    Werror("bigintm_setup: Sorry should NOT be run twice!");
    return TRUE; // ok, TRUE = error!
  }

#endif
}