#include "dgp0.hh"
#include "global.hh"

extern Grammar grammar;
extern MGraph mgraph;
extern SGraph sgraph;

extern bool debug;

list<int> nodelist;
list<int>::iterator processed;

//====================================================================================================

void set_initial_constraints(int node)
{
  sgraph[node].prop.forbidden.reset();
  sgraph[node].prop.required=grammar.is_obl(sgraph.cat(node));
  sgraph[node].prop.attached.reset();
  sgraph[node].prop.flags=grammar.initial_flags(sgraph.cat(node));
}

//----------------------------------------------------------------------------------------------------

bool changing_constraints(int head, Role role)
{
  return grammar.is_sgl(role) || sgraph[head].prop.required[role];
}

//====================================================================================================

NodeProp compute_head_prop(NodeProp headprop, const Link& link, list<Boubble*> bs, FlagSet& depflags)
{
  NodeProp ret=headprop;

  if(grammar.is_sgl(link.role))
    {
      ret.forbidden.set(link.role);
      ret.attached.set(link.role);
    }
  ret.required.reset(link.role);

  ret.required |= (grammar.constr_include(link.role) & ~ret.attached);
  ret.forbidden |= grammar.constr_exclude(link.role);

  ret.boubbles=bs;
  ret.flags |= ( depflags & grammar.pass_flags(link.role) );

  if(link.props[Prop("INIT")]) ret.init_attached=true;
  if(link.props[Prop("FIN")]) ret.fin_attached=true;

  return ret;
}

//----------------------------------------------------------------------------------------------------

NodeProp compute_dep_prop(NodeProp depprop, const Link& link, list<Boubble*> bs)
{
  NodeProp ret=depprop;
  ret.boubbles=bs;
  return ret;
}

//====================================================================================================

int find_existing_node(int mnodeind, NodeProp p, bitset<MAXNODES>& newheadLH, bitset<MAXNODES>& newheadLV)
{
  MNode& mnode = mgraph[mnodeind];
  for(vector<int>::iterator ps=mnode.snodes.begin(); ps!=mnode.snodes.end(); ++ps)
    if(sgraph[*ps].prop==p && sgraph[*ps].LH==newheadLH && sgraph[*ps].LV==newheadLV)      return *ps;
  return -1;
}

//====================================================================================================

list<Boubble*> receive_boubbles(int node, Role role, Dir dir)
{
  list<Boubble*> ret;
  for(list<Boubble*>::iterator b = sgraph[node].prop.boubbles.begin(); b!=sgraph[node].prop.boubbles.end(); b++)
    {
      Boubble* new_boubble = (*b)->step(role,dir);
      if(new_boubble)
	ret.push_back(new_boubble);
    }
  return ret;
}

//----------------------------------------------------------------------------------------------------

list<Boubble*> collect_head_boubbles(int head, int dep, Role role)
{
  list<Boubble*> new_boubbles = grammar.trigger_boubbles(sgraph.cat(dep),role,UP);
  
  for(list<Boubble*>::iterator b = new_boubbles.begin(); b != new_boubbles.end(); b++)
    (*b)->src(dep);

  list<Boubble*> received_boubbles = receive_boubbles(dep,role,UP);

  new_boubbles.insert(new_boubbles.begin(),received_boubbles.begin(),received_boubbles.end());

  return new_boubbles;
}

//----------------------------------------------------------------------------------------------------

list<Boubble*> collect_dep_boubbles(int head, int dep, Role role)
{
  list<Boubble*> new_boubbles = grammar.trigger_boubbles(sgraph.cat(head), role, DOWN);
  
  for(list<Boubble*>::iterator b = new_boubbles.begin(); b != new_boubbles.end(); b++)
    (*b)->src(head);

  list<Boubble*> received_boubbles = receive_boubbles(head,role,DOWN);

  new_boubbles.insert(new_boubbles.begin(),received_boubbles.begin(),received_boubbles.end());

  return new_boubbles;
}

//====================================================================================================

int create_new_head_node_left(list<int>::iterator h, NodeProp& newheadprop, bitset<MAXNODES>& newheadLH, bitset<MAXNODES>& newheadLD, bitset<MAXNODES>& newheadLV)
{
  int newheadind = sgraph.clone(*h,newheadprop);
  list<int>::iterator nextit=h; ++nextit;
  nodelist.insert(nextit,newheadind);
  sgraph[newheadind].LH=newheadLH;
  sgraph[newheadind].LD = newheadLD;
  sgraph[newheadind].in_LH=true;
  sgraph[newheadind].LV.reset();
  
  if(debug) sgraph.print_node_debug(stderr,"C ",newheadind,*h);
  
  return newheadind;
}

int create_new_dep_node_left(list<int>::iterator d, NodeProp& prop, bitset<MAXNODES>& LH, bitset<MAXNODES>& LD, bitset<MAXNODES>& LV)
{
  int newind = sgraph.clone(*d,prop);
  list<int>::iterator nextit=d; ++nextit;
  nodelist.insert(nextit,newind);
  sgraph[newind].LH.reset();
  sgraph[newind].LD=LD;
  sgraph[newind].in_LH=false; //???????
  sgraph[newind].LV.reset();
  
  if(debug) sgraph.print_node_debug(stderr,"C ",newind,*d);
  
  return newind;
}

int create_new_head_node_right(list<int>::iterator h, NodeProp& newheadprop, bitset<MAXNODES>& newheadLH, bitset<MAXNODES>& newheadLD, bitset<MAXNODES>& newheadLV)
{
  int newheadind = sgraph.clone(*h,newheadprop);
  list<int>::iterator nextit=h; ++nextit;
  nodelist.insert(nextit,newheadind);
  sgraph[newheadind].LH=newheadLH;
  sgraph[newheadind].LD=newheadLD;
  sgraph[newheadind].in_LH=false;
  sgraph[newheadind].LV=newheadLV;
  
  if(debug) sgraph.print_node_debug(stderr,"C ",newheadind,*h);
  
  return newheadind;
}

int create_new_dep_node_right(list<int>::iterator d, NodeProp& prop, bitset<MAXNODES>& LH, bitset<MAXNODES>& LD, bitset<MAXNODES>& LV)
{
  int newind = sgraph.clone(*d,prop);
  list<int>::iterator nextit=d; ++nextit;
  nodelist.insert(nextit,newind);
  sgraph[newind].LH=LH;
  sgraph[newind].LD=LD;
  sgraph[newind].in_LH=true; //???????
  sgraph[newind].LV.reset();
  
  if(debug) sgraph.print_node_debug(stderr,"C ",newind,*d);
  
  return newind;
}

//====================================================================================================

void connect_left(list<int>::iterator h, list<int>::iterator d, const Link& l, list<Boubble*>& new_head_boubbles, list<Boubble*>& new_dep_boubbles)
{

  NodeProp &oldheadprop = sgraph[*h].prop;
  NodeProp &olddepprop = sgraph[*d].prop;

  NodeProp newheadprop  = compute_head_prop(oldheadprop,l,new_head_boubbles,olddepprop.flags);
  
  int newheadind;
  if(oldheadprop==newheadprop)
    newheadind = *h;
  else
  {
    bitset<MAXNODES> newheadLH = sgraph[*h].LH;
    bitset<MAXNODES> newheadLV = sgraph[*d].LV;
    bitset<MAXNODES> newheadLD = sgraph[*h].LD;

    newheadind = find_existing_node(sgraph[*h].mnode, newheadprop, newheadLH, newheadLV);
    if( newheadind >= 0 )
      sgraph[newheadind].LD |= newheadLD;
    else
      newheadind = create_new_head_node_left(h,newheadprop,newheadLH,newheadLD,newheadLV);
  }



  NodeProp newdepprop = compute_dep_prop(olddepprop,l,new_dep_boubbles);

  int newdepind;
  
  if(olddepprop==newdepprop)
    newdepind = *d;
  else
  {
    bitset<MAXNODES> newdepLH = sgraph[*d].LH;
    bitset<MAXNODES> newdepLV = sgraph[*d].LV;
    bitset<MAXNODES> newdepLD = sgraph[*d].LD;

    newdepind = find_existing_node(sgraph[*d].mnode, newdepprop, newdepLH, newdepLV);
    if( newdepind >= 0 )
      sgraph[newdepind].LD |= newdepLD; // TYLKO DLA LD
    else
      newdepind = create_new_dep_node_left(d,newdepprop,newdepLH,newdepLD,newdepLV);
  }

  sgraph[newheadind].deps.push_back(Arc(newdepind,l.role,*h,*d));
  
  if(sgraph[*d].saturated()) sgraph[newheadind].LV |= sgraph[*d].LV;

  sgraph[newheadind].LD.set(*d);
  if(sgraph[*d].saturated()) sgraph[newheadind].LD |= sgraph[*d].LD;
  
  if(debug) sgraph.print_arc(stderr,newheadind,*d,l.role,0);
  if(debug) sgraph.print_node_debug(stderr,"U ",newheadind,*h);
  if(debug) sgraph.print_node_debug(stderr,"U ",*d,*d);
}

//----------------------------------------------------------------------------------------------------

void connect_right(list<int>::iterator h, list<int>::iterator d, const Link& l, list<Boubble*>& new_head_boubbles, list<Boubble*>& new_dep_boubbles)
{
  NodeProp &oldheadprop = sgraph[*h].prop;

  NodeProp newheadprop = compute_head_prop(oldheadprop,l,new_head_boubbles, sgraph[*d].prop.flags);

  int newheadind;
  
  if(oldheadprop==newheadprop)
    newheadind = *h;
  else
  {
    bitset<MAXNODES> newheadLH = sgraph[*h].LH;
    bitset<MAXNODES> newheadLV = sgraph[*h].LV;
    bitset<MAXNODES> newheadLD = sgraph[*h].LD;

    newheadind = find_existing_node(sgraph[*h].mnode, newheadprop, newheadLH, newheadLV);
    if( newheadind >= 0 )
      sgraph[newheadind].LD |= newheadLD; // TYLKO DLA LD
    else
      newheadind = create_new_head_node_right(h,newheadprop,newheadLH,newheadLD,newheadLV);
  }

  NodeProp &olddepprop = sgraph[*d].prop;
  NodeProp newdepprop = compute_dep_prop(olddepprop,l,new_dep_boubbles);

  int newdepind;
  
  if(olddepprop==newdepprop)
    newdepind = *d;
  else
  {
    bitset<MAXNODES> newdepLH = sgraph[*d].LH;
    bitset<MAXNODES> newdepLV = sgraph[*d].LV;
    bitset<MAXNODES> newdepLD = sgraph[*d].LD;

    newdepind = find_existing_node(sgraph[*d].mnode, newdepprop, newdepLH, newdepLV);
    if( newdepind >= 0 )
      sgraph[newdepind].LD |= newdepLD; // TYLKO DLA LD
    else
      newdepind = create_new_dep_node_right(d,newdepprop,newdepLH,newdepLD,newdepLV);
  }



  
  sgraph[newdepind].heads.push_back(Arc(newheadind,l.role,*h,*d));

  sgraph[newdepind].LH.set(newheadind);

  //  sgraph[*d].prop.merge_boubbles(new_dep_boubbles);
  
  if(sgraph[newheadind].saturated()) sgraph[newdepind].LH |= sgraph[newheadind].LH;

  if(debug) sgraph.print_arc(stderr,newheadind,newdepind,l.role,1);
  if(debug) sgraph.print_node_debug(stderr,"U ",newheadind,*h);
  if(debug) sgraph.print_node_debug(stderr,"U ",newdepind,*d);
  
}

//====================================================================================================

// sprawdza czy te, spo¶ród b±bli, które dotarły do celu node
// daj± wynik prawdziwy, dodatkowo - usuwa je z listy boubbles

bool check_boubbles_at_target(list<Boubble*>& boubbles, int node)
{
  list<Boubble*>::iterator last; // ostatnio sprawdzany b±bel
  bool remove=false;             // czy usun±ć ostatnio sprawdzany b±bel

  for(list<Boubble*>::iterator b = boubbles.begin(); b != boubbles.end(); b = remove ? boubbles.erase(b) : ++b )
    if( (*b)->is_at_target() )
      if( grammar.check_longrel(sgraph.cat((*b)->src()), sgraph.cat(node), (*b)->rel()) )
	remove=true;
      else
	return false;
    else
      remove=false;
      
  return true;
}

// bool check_boubbles_at_target(list<Boubble*> boubbles, int node)
// {
//   for(list<Boubble*>::iterator b = boubbles.begin(); b != boubbles.end(); ++b )
//     if( (*b)->is_at_target() && !grammar.check_longrel(sgraph.cat((*b)->src()), sgraph.cat(node), (*b)->rel()) )
//       return false;
//   return true;
// }

//====================================================================================================

void try_connect_dependents(list<int>::iterator j)
{
  for(list<int>::iterator i(j); i!=nodelist.begin(); --i)
    if(sgraph.visible(*i,*j) && sgraph.saturated(*i))
    {
      if(debug) {fprintf(stderr,"## %d <-- %d ... ",*i,*j); }

      list<const Link*> ji_links = grammar.connectable2( sgraph.cat(*j), sgraph.cat(*i), sgraph[*j].prop.flags, sgraph[*i].prop.flags); // ref do Roles!!!
      list<const Link*>::iterator ri = ji_links.begin();
      if(ri == ji_links.end()) { if(debug) fprintf(stderr,"no roles\n"); }
      else
	{
	  for(; ri != ji_links.end(); ++ri )
	    if(!grammar.check_constr2(sgraph[*j].prop,sgraph[*i].prop,0,**ri ))
	      { if(debug) fprintf(stderr,"constraints failed\n"); }
	    else
	      {
		list<Boubble*> new_head_boubbles = collect_head_boubbles(*j,*i,(*ri)->role);
		list<Boubble*> new_dep_boubbles = collect_dep_boubbles(*j,*i,(*ri)->role);
		
		if( !(check_boubbles_at_target(new_head_boubbles,*j) && check_boubbles_at_target(new_dep_boubbles,*i)) )
		  { if(debug) fprintf(stderr,"boubbles failed\n"); }
		else
		  {
		    if(debug) fprintf(stderr,"success\n");
		    connect_left( j, i, **ri, new_head_boubbles, new_dep_boubbles);
		  }
	      }
	}
    }
}


//----------------------------------------------------------------------------------------------------

void try_connect_heads(list<int>::iterator j)
{
  for(list<int>::iterator i(j); i!=nodelist.begin(); --i)
    if(sgraph.visible(*i,*j))
    {
      if(debug) fprintf(stderr, "## %d --> %d ... ",*i,*j);

      list<const Link*> ij_links = grammar.connectable2( sgraph.cat(*i), sgraph.cat(*j), sgraph[*i].prop.flags, sgraph[*j].prop.flags );
      list<const Link*>::iterator ri = ij_links.begin();
      if(ri == ij_links.end()) { if(debug) fprintf(stderr,"no roles\n"); }
      else
	{
	  for(; ri != ij_links.end(); ++ri )
	    if( !grammar.check_constr2( sgraph[*i].prop, sgraph[*j].prop, 1, **ri ) )
	      { if(debug) fprintf(stderr,"constraints failed\n"); }
	    else
	      {
		list<Boubble*> new_head_boubbles = collect_head_boubbles(*i,*j,(*ri)->role);
		list<Boubble*> new_dep_boubbles = collect_dep_boubbles(*i,*j,(*ri)->role);
		
		if( !(check_boubbles_at_target(new_head_boubbles,*i) && check_boubbles_at_target(new_dep_boubbles,*j)) )
		  { if(debug) fprintf(stderr,"boubbles failed\n"); }
		else
		  {
		    if(debug) fprintf(stderr,"success\n");
		    connect_right( i, j, **ri, new_head_boubbles, new_dep_boubbles );
		  }
	      }
	}
    }
}
  
//====================================================================================================

void reverse_links()
{
  list<int>::iterator i = nodelist.begin();
  for(++i; i!=nodelist.end(); ++i)
    {
      for(vector<Arc>::iterator da=sgraph[*i].deps.begin()--; da!=sgraph[*i].deps.end(); ++da)
        sgraph[da->dst].heads.push_back(Arc(*i,da->role,da->headanc,da->depanc));
      for(vector<Arc>::iterator ha=sgraph[*i].heads.begin(); ha!=sgraph[*i].heads.end(); ++ha)
        sgraph[ha->dst].deps.push_back(Arc(*i,ha->role,ha->headanc,ha->depanc));
    }
}

//====================================================================================================

void dgp1()
{

  nodelist.clear();
  nodelist.push_back(0); // BOS
  processed=nodelist.begin();

  for(int m=0; m<mgraph.size() ; ++m)
  {
    int basenode = sgraph.add_base_snode(m); // ma zwracać SNode*

    set_initial_constraints(basenode);
    nodelist.push_back(basenode);

    if(debug) {sgraph.print_node_debug(stderr,"B ",basenode,-1);} // STDOUT!!!

    list<int>::iterator cursor=processed;
    while(++cursor != nodelist.end())
    {
      try_connect_dependents(cursor);
      try_connect_heads(cursor);
      processed=cursor;
    }

  }
  reverse_links();
}