#!/usr/bin/perl -w
# A quick-hack solution for checking coupons for the Norwegian LOTTO.
# This code is not hapered by copyright, it was released into
# the public domain by Jon Langseth (jon dot langseth at lilug dot no) in 2009.
#
# Sample result of execution is screenshotted at 
#     http://defcon.no/files/lotto.pl.png
#
# File formats;
# Common for both files: 
#   Numbers below 10 may be zero-padded,
#   Whitespace is matched and filtered using \s+, so any number of
#   non-line-terminating whitespace can be used to separate numbers.
#
# File format, results, remove leading "# ". File consists of _two_ lines:
#
# 1 5 9 16 25 26 31
# 4 32 34
#
# The fist line is the main result numbers, the second is the extra numbers.
#
# File format, coupon(s), remove leading "# ". The file consists of coupon
# rows, one row per line, numbers separated by whitespace, seven numbers to a 
# row, 
#
#  8 10 19 20 21 28 30
#  3  8 15 16 18 19 33
#  7 11 21 22 23 28 34
#  6 16 18 25 26 31 32
#  2  3 11 16 21 22 27
#  1  8 12 16 21 22 23
#  2  9 16 21 23 26 34
#  2  3  4  7 10 27 30
# 11 16 19 20 21 29 32 
#  5 16 22 24 28 30 34
# 

use strict;

sub errr {
	print "Syntax: " . $0 . " kupong.txt resultat.txt\n";
	print "  kupong.txt inneholder lottokupong med siffere \n";
	print "  skilt av mellom, en rekke per linje, \n";
	print "  resultat.txt inneholder en linje med resultatets\n";
	print "  hovedtall, og en linje med tilleggstall\n";
	print "  # på start av linje er kommentar i begge filer.\n";
	exit(1);
}

# Check that two arguments are passed.
if ( $#ARGV < 1 ) {
	&errr;
}
my $coupon = $ARGV[0];
my $result = $ARGV[1];
my $tmp;
my $count = 0;
my @mains;
my @extras;

# Check for the existance of the files given as arguments.
# I do not check for readable, as this will be handled by a failure to open later :P
&errr if ( not -f $coupon );
&errr if ( not -f $result );

# Read the results file
open( IN, "<" . $result ) or &errr;

# First, the main numbers. The norwegian standard LOTTO has seven main numbers.
# Note that I do not actually check that the array has seven, only seven, entries..
# Yeah, I could have done a sub of the text-sanitation, as it is used three times.
# But, as a do not like to fiddle with array-referencing, inline is the simplest.
$tmp = <IN>;
chomp $tmp;
if ( $tmp =~ m/\d{1,2}\s+\d{1,2}\s+\d{1,2}\s+\d{1,2}\s+\d{1,2}\s+\d{1,2}\s+\d{1,2}/ ) {
	$tmp =~ s/^\s+//g;
	$tmp =~ s/\s+/:/g;
	$tmp =~ s/0(\d)/$1/g;
	@mains = split ( ":", $tmp);
} else {
	&errr;
}
# Next line of the result file contains the extra numbers (bonus numbers/additionals)
# In the Norwegian LOTTO there are three such numbers.
# Note that I do not actually check that the array has three, only three, entries..
$tmp = <IN>;
chomp $tmp;
if ( $tmp =~ m/\d{1,2}\s+\d{1,2}\s+\d{1,2}/ ) {
	$tmp =~ s/^\s+//g;
	$tmp =~ s/\s+/:/g;
	$tmp =~ s/0(\d)/$1/g;
	@extras = split ( ":", $tmp);
} else {
	&errr;
}
close(IN);

open( IN, "<" . $coupon ) or &errr;

print "\n  .-------------------------+---------+-------------.\n";

# Read teh coupon file, line by line. 
while (<IN>) {
	next if m/^#/;
	# The Norwegian LOTTO uses seven numbers per sequence, ten sequences to a row.
	# I do not check for additional numbers above seven, and yes, that is a weakness.
	# I hope the user is sane enough to not feed stupidness...
	next if not  m/\d{1,2}\s+\d{1,2}\s+\d{1,2}\s+\d{1,2}\s+\d{1,2}\s+\d{1,2}\s+\d{1,2}/;

	# Again, the text-sanitation. This is the last time.
	chomp $_;
	$_ =~ s/^\s+//g;
	$_ =~ s/\s+/:/g;
	$_ =~ s/0(\d)/$1/g;
	my @row = split ( ":");

	my $mres = 0;
	my $mext = 0;
	# Ten rows to a coupon in the Norwegian LOTTO....
	if ( $count > 9 ) {
		print "  |-------------------------+---------+-------------|\n";
		$count = 0;
	}
	print "  |  ";
	foreach my $num ( @row ) {
		# Dirty, slow, but good enough, and a simple solution:
		# Step through all the main numbers, checking for a match,
		# and set a color + increment the main result or extras result
		# accordingly. The "last" statements may speed things a litte :P
		# This is not a robust mechanism, but as long as we are given
		# other data than garbage as input, we should be safe..
		foreach my $m ( @mains) {
			if ( $num == $m ) { print ""; $mres++; last; }
		}
		foreach my $m ( @extras) {
			if ( $num == $m ) { print ""; $mext++; last; }
		}

		# Prettyprint the current number..
		if ( $num < 10 ) { print "0"; }
		print $num . " ";

	}
	print "  |  $mres + $mext  | ";

	# This is the price weighting of the norwegian LOTTO. 
	# $mres is the main result, $mext is the extras result.
	# 7 main numbers..
	if    ( $mres == 7 )                       { print " 1. premie! |"; }
	# 6 main numbers, plus one extra number
	elsif ( ( $mres == 6 ) && ( $mext  > 0 ) ) { print " 2. premie! |"; }
	# 6 main numbers, no extras
	elsif ( ( $mres == 6 ) && ( $mext == 0 ) ) { print " 3. premie  |"; }
	# 5 main numbers, no extras
	elsif ( ( $mres == 5 ) && ( $mext == 0 ) ) { print " 4. premie  |"; }
	# 4 main numbers, plus one or more extra numbers
	elsif ( ( $mres == 4 ) && ( $mext  > 0 ) ) { print " 5. premie  |"; }
	# less than four correct numbers, no price....
	else                                       { print      "            |"; }

	print "\n";
	$count++;
}
close(IN);
print "  '-------------------------+---------+-------------'\n\n";