#!/usr/bin/perl

##BILLING PROGRAM##

use strict;

my(@data,@data2);
##open needed files to use in program

    open(FILE, "../Counts/newdata.txt")
                or die "Can't open file: $!\n";
    open(FILE2, "../Counts/info.csv")
                or die "Can't open file: $!\n";

##throw files into arrays and define arrays

    chomp(@data = <FILE>);
    chomp(@data2 = <FILE2>);

##define hash
my ($id,$name,$srid);

    my %keyhash = ( $id => { NAME => $name,
            SRID  => $srid,
            CSV => []
            }
            );

##populate arrays: 

    foreach ( @data ) {

    ##define variables
    my ($id,$name,$srid) = split /,/;

    # Add some error checking to make sure the
    # hash key $id does not already exist

    $keyhash{$id} = { NAME => $name,
            SRID  => $srid,
            CSV => [],
        }
    }

##print unused ids from csv file

    print "\n\nUnused ids from csv file\n";
    print "--------------------------\n";

    foreach ( @data2 ) {
        my ($id,$name,$srid) = split /,/;

        # Warn and do nothing if a record is found for which the
        # $name is not already in %keyhash
    
        unless ( defined( $keyhash{$name} ) ) {
            warn "No such record $id!\n";
        next;
        }
  
    push @{$keyhash{$id}{CSV}}, [ $name, $srid ];
    }

##Finally, extract the number of records for each customer 

##print column headers

    print "\n\n";
    print "Customer    #of docs\n";
    print "-------------------------\n";

# A little something to get the plurality correct

    foreach ( keys %keyhash ) {
        my $num = @{$keyhash{$_}{CSV}};
        printf "%s        %d\n",
        $keyhash{$_}{NAME}, 
    $num,
    }

##just formatting by adding a couple returns at the end of the printou
+t

    print "\n\n";

##my choice of data structures ( hashes instead of arrays ) is dependa
+nt 
##on how we want to use the data later.

##close files

    close (FILE);
    close (FILE2);

##exit program

    exit;
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