#include <graph_displayer_canvas.h>
#include <broken_edge.h>
#include <math.h>


int GraphDisplayerCanvas::changeEdgeWidth (std::string mapname, Graph::Edge edge)
{
  Graph::EdgeMap<double> * actual_map;
  if(mapname=="Default")
    {
      actual_map=new Graph::EdgeMap<double>(g,edge_property_defaults[E_WIDTH]);
    }
  else
    {
      actual_map=(mapstorage.edgemap_storage)[mapname];
    }

  if(edge==INVALID)
    {
      for (EdgeIt i(g); i!=INVALID; ++i)
	{
	  int w=(int)(*actual_map)[i];
	  if(w>=0)
	    {
	      edgesmap[i]->property_width_pixels().set_value(w);
	    }
	}
    }
  else
    {
      int w=(int)(*actual_map)[edge];
      if(w>=0)
	{
	  edgesmap[edge]->property_width_pixels().set_value(w);
	}
    }
  return 0;
};

int GraphDisplayerCanvas::changeEdgeColor (std::string mapname, Graph::Edge edge)
{  

  //function maps the range of the maximum and
  //the minimum of the nodemap to the range of
  //green in RGB
  Graph::EdgeMap<double> * actual_map;
  if(mapname=="Default")
    {
      actual_map=new Graph::EdgeMap<double>(g,edge_property_defaults[E_COLOR]);
    }
  else
    {
      actual_map=(mapstorage.edgemap_storage)[mapname];
    }

  double max, min;

  if(mapname!="Default")
    {
      max=mapstorage.maxOfEdgeMap(mapname);
      min=mapstorage.minOfEdgeMap(mapname);
    }
  else
    {
      max=edge_property_defaults[E_COLOR];
      min=edge_property_defaults[E_COLOR];
    }

  if(edge==INVALID)
    {
      for (EdgeIt i(g); i!=INVALID; ++i)
	{
	  double w=(*actual_map)[i];

	  Gdk::Color color;
	  if(max!=min)
	    {
	      color.set_rgb_p (0, 100*(w-min)/(max-min), 0);
	    }
	  else
	    {
	      color.set_rgb_p (0, 100, 0);
	    }
	  edgesmap[i]->property_fill_color_gdk().set_value(color);
	}
    }
  else
    {
      Gdk::Color color;

      double w=(*actual_map)[edge];

      if(max!=min)
	{
	  color.set_rgb_p (0, 100*(w-min)/(max-min), 0);
	}
      else
	{
	  color.set_rgb_p (0, 100, 0);
	}

      edgesmap[edge]->property_fill_color_gdk().set_value(color);
    }
  return 0;
};

int GraphDisplayerCanvas::changeEdgeText (std::string mapname, Graph::Edge edge)
{

  //the number in the map will be written on the edge
  //EXCEPT when the name of the map is Text, because
  //in that case empty string will be written, because
  //that is the deleter map

  if(edge==INVALID)
    {
      for (EdgeIt i(g); i!=INVALID; ++i)
	{
	  if(mapname!="Default")
	    {
	      edgemap_to_edit=mapname;
	      double number=(*(mapstorage.edgemap_storage)[mapname])[i];
	      int length=1;
	      //if number is smaller than one, length would be negative, or invalid
	      if(number>=1)
		{
		  length=(int)(floor(log(number)/log(10)))+1;
		}
	      int maxpos=(int)(pow(10,length-1));
	      int strl=length+1+RANGE;
	      char * str=new char[strl];
	      str[length]='.';
	      str[strl]='\0';
      
	      for(int j=0;j<strl;j++)
		{
		  if(j!=length)
		    {
		      if((number-(int)number)>ALMOST_ONE)
			{
			  number=round(number);
			}
		      int digit=(int)(number/maxpos);
		      str[j]=(digit+'0');
		      number-=digit*maxpos;
		      number*=10;
		    }
		}
      
	      edgetextmap[i]->property_text().set_value(str);
	    }
	  else
	    {
	      edgemap_to_edit="";
	      edgetextmap[i]->property_text().set_value("");
	    }
	}

    }
  else
    {
      if(mapname!="Default")
	{
	  double number=(*(mapstorage.edgemap_storage)[mapname])[edge];
	  int length=1;
	  //if number is smaller than one, length would be negative, or invalid
	  if(number>=1)
	    {
	      length=(int)(floor(log(number)/log(10)))+1;
	    }
	  int maxpos=(int)(pow(10,length-1));
	  int strl=length+1+RANGE;
	  char * str=new char[strl];
	  str[length]='.';
	  str[strl]='\0';
      
	  for(int j=0;j<strl;j++)
	    {
	      if(j!=length)
		{
		  if((number-(int)number)>ALMOST_ONE)
		    {
		      number=round(number);
		    }
		  int digit=(int)(number/maxpos);
		  str[j]=(digit+'0');
		  number-=digit*maxpos;
		  number*=10;
		}
	    }
      
	  edgetextmap[edge]->property_text().set_value(str);
	}
      else
	{
	  edgetextmap[edge]->property_text().set_value("");
	}
	  
    }

  return 0;

};