#!/usr/bin/perl

###
## Copyright 2020 Tomas Moyano (tcmoyano@uc.cl) , Jose Alvarez and Rodrigo Gutierrez.
# 
# This program receives ordered files and sorts them taking into 
# account equal columns and collapses the different information in the last column. 
# usage: sort file |perl collapse.pl >file.collapse

#  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 3 of the License, or
#  (at your option) any later version.
#  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.

use strict;

  
my $id=$ARGV[0];
my $cuentas;
my $ini=0;

while( my $file = <STDIN> )
{
  chomp ($file);

  my @data = split(/\t/,$file);

  # $nid contain the columns used for the comparison in this case all minus the last.
  
  my $nid= join "\t",@data[0..($#data-1)];

  if ($nid ne $id)
  {
    if($ini eq "0")
    {
      print  "$nid\t$data[$#data]";
    }

    if($ini eq "1") 
    {
    print  "\n$nid\t$data[$#data]";
    }
  }

  $ini=1;
  if ($nid eq $id ) 
  {
    print "|$data[$#data]";
    next;
  }

  $id=join "\t",join "\t",@data[0..($#data-1)];
 
}

print "\n";