#  Copyright (c) 1997-2021
#  Ewgenij Gawrilow, Michael Joswig, and the polymake team
#  Technische Universität Berlin, Germany
#  https://polymake.org
#
#  This program is free software; you can redistribute it and/or modify it
#  under the terms of the GNU General Public License as published by the
#  Free Software Foundation; either version 2, or (at your option) any
#  later version: http://www.gnu.org/licenses/gpl.txt.
#
#  This program is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#  GNU General Public License for more details.
#-------------------------------------------------------------------------------

#  The aim of all these methods is to convert the obsolete properties read from a plain data file
#  to the corresponding sub-object properties.

sub translate_plain_file_type : method {
   (undef, my $legacy_type)=@_;
   ( $legacy_type && do {
        $legacy_type =~ s/^(Rational|Float)Polytope$/Polytope<$1>/;
        eval("typeof $legacy_type")
     }, typeof Polytope<Rational> )
}

object Polytope {

   # the graph and dual graph related properties

   method upgrade_plain_GRAPH {
      my ($this, $value)=@_;
      $this->take("GRAPH.ADJACENCY", $value);
   }

   method upgrade_plain_DUAL_GRAPH {
      my ($this, $value)=@_;
      $this->take("DUAL_GRAPH.ADJACENCY", $value);
   }

   method upgrade_plain_N_EDGES {
      my ($this, $value)=@_;
      $this->take("GRAPH.N_EDGES", $value);
   }

   method upgrade_plain_N_RIDGES {
      my ($this, $value)=@_;
      $this->take("DUAL_GRAPH.N_EDGES", $value);
   }

   method upgrade_plain_VERTEX_DEGREES {
      my ($this, $value)=@_;
      $this->take("GRAPH.NODE_DEGREES", $value);
   }

   method upgrade_plain_FACET_DEGREES {
      my ($this, $value)=@_;
      $this->take("DUAL_GRAPH.NODE_DEGREES", $value);
   }

   method upgrade_plain_DIAMETER {
      my ($this, $value)=@_;
      $this->take("GRAPH.DIAMETER", $value);
   }

   method upgrade_plain_DUAL_DIAMETER {
      my ($this, $value)=@_;
      $this->take("DUAL_GRAPH.DIAMETER", $value);
   }

   method upgrade_plain_TRIANGLE_FREE {
      my ($this, $value, $boolean_value)=@_;
      $this->take("GRAPH.TRIANGLE_FREE", $boolean_value);
   }

   method upgrade_plain_DUAL_TRIANGLE_FREE {
      my ($this, $value, $boolean_value)=@_;
      $this->take("DUAL_GRAPH.TRIANGLE_FREE", $boolean_value);
   }

   method upgrade_plain_EVEN {
      my ($this, $value, $boolean_value)=@_;
      $this->take("GRAPH.BIPARTITE", $boolean_value);
   }

   method upgrade_plain_DUAL_EVEN {
      my ($this, $value, $boolean_value)=@_;
      $this->take("DUAL_GRAPH.BIPARTITE", $boolean_value);
   }

   method upgrade_plain_GRAPH_SIGNATURE {
      my ($this, $value)=@_;
      $this->take("GRAPH.SIGNATURE", $value);
   }

   method upgrade_plain_DUAL_GRAPH_SIGNATURE {
      my ($this, $value)=@_;
      $this->take("DUAL_GRAPH.SIGNATURE", $value);
   }

   method upgrade_plain_CONNECTIVITY {
      my ($this, $value)=@_;
      $this->take("GRAPH.CONNECTIVITY", $value);
   }

   method upgrade_plain_DUAL_CONNECTIVITY {
      my ($this, $value)=@_;
      $this->take("DUAL_GRAPH.CONNECTIVITY", $value);
   }

   method upgrade_plain_HASSE_DIAGRAM {
      my ($this, $value)=@_;
      $this->HASSE_DIAGRAM=graph::FaceLattice_from_plain_text($value);
   }

   method upgrade_plain_BOUNDED_COMPLEX {
      my ($this, $value)=@_;
      $this->BOUNDED_COMPLEX->HASSE_DIAGRAM=graph::FaceLattice_from_plain_text($value);
   }

   # Triangulations
   
   method upgrade_plain_TRIANGULATION {
      my ($this, $value)=@_;
      $this->take("TRIANGULATION.FACETS", $value);
   }
   
   method upgrade_plain_TRIANGULATION_BOUNDARY {
      my ($this, $value)=@_;
      my $tb_new;
      foreach (split /\n/, $value) {
         s/\{\{/\{/;
	 s/\}\}/\}/;
	 s/\}\s\{/\}\n\{/g;
	 $tb_new.=$_;
      }
      $this->take("TRIANGULATION.BOUNDARY.FACETS",$tb_new);
      my $tb=new Array<Set<Int>>($value);
      my $n_facets=scalar(@$tb);
      my $tb_f_triag=new Array<Set<Int>>($n_facets);
      my $n_simplices=0;
      for (my $i=0; $i<$n_facets;++$i) {
         my $ns_f=$tb->[$i]->size;
         $tb_f_triag->[$i]=sequence($n_simplices,$ns_f);
	 $n_simplices+=$ns_f;
      }
      print $tb_f_triag; 
      $this->TRIANGULATION->BOUNDARY->FACET_TRIANGULATIONS=$tb_f_triag;
   }

   # Schlegel diagrams

   method upgrade_plain_SCHLEGEL_PARAMS {
      my ($this, $value)=@_;
      my ($facet, $zoom, $facet_point, $inner_point)= $value =~ /\A\s* (\d+) \s+ (\S+) \s* ^(.*)$ \n ^(.*)$/xm;
      $this->SCHLEGEL_DIAGRAM(FACET=>$facet, ZOOM=>$zoom, FACET_POINT=>$facet_point, INNER_POINT=>$inner_point);
   }

   method upgrade_plain_SCHLEGEL_TRANSFORM {
      my ($this, $value)=@_;
      $this->take("SCHLEGEL_DIAGRAM.TRANSFORM", $value);
   }

   method upgrade_plain_SCHLEGEL_VIEWPOINT {
      my ($this, $value)=@_;
      $this->take("SCHLEGEL_DIAGRAM.VIEWPOINT", $value);
   }

   method upgrade_plain_SCHLEGEL_VERTICES {
      my ($this, $value)=@_;
      $this->take("SCHLEGEL_DIAGRAM.VERTICES", $value);
   }

   # LP related properties

   method upgrade_plain_LINEAR_OBJECTIVE {
      my ($this, $value)=@_;
      $this->take("LP.LINEAR_OBJECTIVE", $value);
   }

   method upgrade_plain_ABSTRACT_OBJECTIVE {
      my ($this, $value)=@_;
      $this->take("LP.ABSTRACT_OBJECTIVE", $value);
   }

   method upgrade_plain_MAXIMAL_FACE {
      my ($this, $value)=@_;
      $this->take("LP.MAXIMAL_FACE", $value);
   }

   method upgrade_plain_MINIMAL_FACE {
      my ($this, $value)=@_;
      $this->take("LP.MINIMAL_FACE", $value);
   }

   method upgrade_plain_MAXIMAL_VERTEX {
      my ($this, $value)=@_;
      $this->take("LP.MAXIMAL_VERTEX", $value);
   }

   method upgrade_plain_MINIMAL_VERTEX {
      my ($this, $value)=@_;
      $this->take("LP.MINIMAL_VERTEX", $value);
   }

   method upgrade_plain_MAXIMAL_VALUE {
      my ($this, $value)=@_;
      if ($value !~ $Core::PropertyValue::UNDEF_re) {
	 $this->take("LP.MAXIMAL_VALUE", $value);
      }
   }

   method upgrade_plain_MINIMAL_VALUE {
      my ($this, $value)=@_;
      if ($value !~ $Core::PropertyValue::UNDEF_re) {
	 $this->take("LP.MINIMAL_VALUE", $value);
      }
   }

   method upgrade_plain_DIRECTED_GRAPH {
      my ($this, $value)=@_;
      $this->take("LP.DIRECTED_GRAPH.ADJACENCY", $value);
   }

   method upgrade_plain_VERTEX_OUT_DEGREES {
      my ($this, $value)=@_;
      $this->take("LP.DIRECTED_GRAPH.NODE_OUT_DEGREES", $value);
   }

   method upgrade_plain_VERTEX_IN_DEGREES {
      my ($this, $value)=@_;
      $this->take("LP.DIRECTED_GRAPH.NODE_IN_DEGREES", $value);
   }

   method upgrade_plain_VERTEX_COLORS { }	# discard it

   method upgrade_plain_RANDOM_EDGE_EPL {
      my ($this, $value)=@_;
      $this->take("LP.RANDOM_EDGE_EPL", $value);
   }

   method upgrade_plain_VARIABLE_NAMES {
      my ($this, $value)=@_;
      $this->take("COORDINATE_LABELS", $value);
   }

   # attributed graphs are converted to graphs with property maps

   method upgrade_plain_BOUNDED_GRAPH {
      my ($this, $value)=@_;
      my $n;
      # we dare not use rules on an object being built up
      unless (defined ($n=$this->lookup("N_VERTICES"))) {
	 if (defined (my $v=$this->lookup("VERTICES"))) {
	    $n=$v->rows;
	 } elsif (defined ($v=$this->lookup("VERTICES_IN_FACETS"))) {
	    $n=$v->cols;
	 } elsif (defined (my $G=$this->lookup("GRAPH.ADJACENCY"))) {
	    $n=$G->nodes;
	 } else {
	    return;
	 }
      }
      my $BG=new GraphAdjacency($n);
      my @renumber= map { /^\s*\(\s*(\d+)/ } split /\n/, $value;
      my $from=0;
      foreach (split /\n/, $value) {
	 my ($edges)=/\{(.*)\}/;
	 foreach my $to ($edges =~ /\d+/g) {
	    if ($from>=$to) {
	       $BG->edge($renumber[$from], $renumber[$to]);
	    }
	 }
	 ++$from;
      }
      $from=0;
      foreach (@renumber) {
	 while ($from<$_) {
	    $BG->delete_node($from);
	    ++$from;
	 }
	 ++$from;
      }
      while ($from<$n) {
	 $BG->delete_node($from++);
      }
      $this->take("BOUNDED_COMPLEX.GRAPH.ADJACENCY", $BG);
      1
   }

   sub parse_graph_with_edge_attributes {
      my ($value, $attr_re)=@_;
      my $adjacency="";
      my @map;
      my $from=0;
      foreach (split /\n/, $value) {
         s{\(\s*(\d+)\s+($attr_re)\s*\)}{
            if ($from>=$1) {
               push @map, $2; $1
            } else {
               ""
            }
         }eg;
         $adjacency.="$_\n";
         ++$from;
      }
      return ($adjacency, \@map);
   }

   method upgrade_plain_EDGE_COLORED_BOUNDED_GRAPH {
      my ($this, $value)=@_;
      my ($adjacency, $colors)=parse_graph_with_edge_attributes($value, qr/\d+/);
      if ($this->lookup("BOUNDED_COMPLEX.GRAPH.ADJACENCY") || upgrade_plain_BOUNDED_GRAPH($this,$adjacency)) {
         $this->take("BOUNDED_COMPLEX.GRAPH.EDGE_COLORS", $colors);
      }
   }
      
   method upgrade_plain_EDGE_DIRECTIONS_GRAPH {
      my ($this, $value)=@_;
      my ($adjacency, $dirs)=parse_graph_with_edge_attributes($value, qr/<.*?>/);
      $this->lookup("GRAPH.ADJACENCY") || upgrade_plain_GRAPH($this,$adjacency);
      tr/<>/  / for @$dirs;
      $this->take("GRAPH.EDGE_DIRECTIONS", $dirs);
   }

   method upgrade_plain_EDGE_DIRECTED_BOUNDED_GRAPH {
      my ($this, $value)=@_;
      my ($adjacency, $dirs)=parse_graph_with_edge_attributes($value, qr/<.*?>/);
      if ($this->lookup("BOUNDED_COMPLEX.GRAPH.ADJACENCY") || upgrade_plain_BOUNDED_GRAPH($this,$adjacency)) {
	 tr/<>/  / for @$dirs;
	 $this->take("BOUNDED_COMPLEX.GRAPH.EDGE_DIRECTIONS", $dirs);
      }
   }

   # new object types introduced

   method cast_if_seen_SUM_PRODUCT_GRAPH { "PropagatedPolytope" }

   method cast_if_seen_VORONOI_BOUNDING_BOX { "VoronoiPolyhedron" }

   method cast_if_seen_VORONOI_GRAPH { "VoronoiPolyhedron" }

   method cast_if_seen_DELAUNAY_GRAPH { "VoronoiPolyhedron" }
   
   method cast_if_seen_NN_GRAPH { "VoronoiPolyhedron" }

   method cast_if_seen_NN_CRUST_GRAPH { "VoronoiPolyhedron" }

   sub convert_to_PointConfiguration {
      my $this=shift;
      if (defined (my $pts=$this->lookup("POINTS"))) {
	 my $pc=new PointConfiguration;
	 $pc->take("POINTS", $pts);
	 $this->remove("POINTS");
	 [ $pc, "CONVEX_HULL" ]
      } else {
	 undef
      }
   }

   method cast_if_seen_TRIANGULATION_INT {
      if (defined $_[0]->lookup("VERTICES")) {
	 # do nothing
	 undef;
      } else {
	 &convert_to_PointConfiguration;
      }
   }

   method cast_if_seen_CHIROTOPE_INT {
      &convert_to_PointConfiguration;
   }

   # properties with changed semantics

   method upgrade_plain_H_VECTOR {
      my ($this, $value)=@_;
      if ($this->lookup("SIMPLICIAL")) {
	 $this->take("H_VECTOR",$value);
      } elsif ($this->lookup("SIMPLE")) {
	 $this->take("DUAL_H_VECTOR",$value);
      }  # if neither SIMPLE nor SIMPLICIAL known, discard this section
   }

   # obsolete properties

   method upgrade_plain_TRIANGULATION_SIGNS { }  # discard

   method upgrade_plain_TRIANGULATION_INT_SIGNS { }  # discard

   method upgrade_plain_REVERSE_TRANSFORMATION {
      my ($this, $value)=@_;
      $this->attach("REVERSE_TRANSFORMATION", new Matrix<Scalar>($value));
   }

   # dimensions renamed after the switch to cones

   method upgrade_plain_AMBIENT_DIM {
      my ($this, $value)=@_;
      $this->take("CONE_AMBIENT_DIM", $value+1);
   }

   method upgrade_plain_DIM {
      my ($this, $value)=@_;
      my $as_dim;
      if(defined($this->lookup("POINTS | VERTICES | INEQUALITIES | FACETS | EQUATIONS | AFFINE_HULL"))){
	  $as_dim="CONE_DIM"; #POLYTOPE_AMBIENT_DIM was wrong! Should have been POLYTOPE_DIM!
	  $value++;
      } else {
	  $as_dim="COMBINATORIAL_DIM";
      }
      $this->take($as_dim, $value);
   }

   method upgrade_plain_AFFINE_HULL {
      my ($this, $value)=@_;
      if (length($value)) {
	 $this->take("AFFINE_HULL", $value);
      }
   }
}


object PropagatedPolytope {

   method upgrade_plain_SUM_PRODUCT_GRAPH {
      my ($this, $value)=@_;
      my (@adjacency, @trans);
      foreach (split /\n/, $value) {
	 while (s/\((\d+) \s+ <? ([^>)]+) >?\s*\)/$1/x) {
	    push @trans, $2;
	 }
	 push @adjacency, $_;
      }
      $this->take("SUM_PRODUCT_GRAPH.ADJACENCY", \@adjacency);
      $this->take("SUM_PRODUCT_GRAPH.TRANSLATIONS", \@trans);
   }
}


object VoronoiPolyhedron {

   method upgrade_plain_DELAUNAY_GRAPH {
      my ($this, $value)=@_;
      $this->take("DELAUNAY_GRAPH.ADJACENCY", $value);
   }

   method upgrade_plain_VORONOI_GRAPH {
      my ($this, $value)=@_;
      convert_graph_with_coords($this, $value, "VORONOI_GRAPH");
   }

   method upgrade_plain_VORONOI_BOUNDING_BOX {
      my ($this, $value)=@_;
      $this->take("VORONOI_GRAPH.BOUNDING_BOX", $value);
   }

   method upgrade_plain_NN_GRAPH {
      my ($this, $value)=@_;
      $this->take("NN_GRAPH.ADJACENCY", $value);
   }

   method upgrade_plain_NN_CRUST_GRAPH {
      my ($this, $value)=@_;
      $this->take("NN_CRUST_GRAPH.ADJACENCY", $value);
   }

   sub convert_graph_with_coords {
      my ($this, $value, $prop_name)=@_;
      my (@adjacency, @coords);
      while (/^\s*\(\s*<? (.*?) >?\s* (\{.*?\})/xm) {
	 push @coords, $1;
	 push @adjacency, $2;
      }
      $this->take("$prop_name.ADJACENCY", \@adjacency);
      $this->take("$prop_name.COORDINATES", \@coords);
   }

}

object PointConfiguration {

   method upgrade_plain_TRIANGULATION_INT {
      my ($this, $value)=@_;
      $this->take("TRIANGULATION", $value);
   }

   method upgrade_plain_CHIROTOPE_INT {
      my ($this, $value)=@_;
      $this->take("CHIROTOPE", $value);
   }
}


# Local Variables:
# mode: perl
# c-basic-offset:3
# End:
