use strict;
use utf8;

# usage: perl extractbench.pl konvensin.tsv konvensout.tsv

my $input  = $ARGV[0];
my $output = $ARGV[1];

open( IN,  '<:encoding(UTF-8)', $input )  or die("can't open $input");
open( OUT, '>:encoding(UTF-8)', $output ) or die("can't open $output");

my $splitbysent = 0;
my $contextsize = 5;

print OUT "ID\tNGRAMNORM\tCLASS\tNGRAM1\tCONTEXT1\tNGRAM2\tCONTEXT2\n";

while ( defined( my $line = <IN> ) ) {
	chomp($line);
	my @fields = split(/\t/,$line);
	my $id = $fields[0];
	my $ngramnorm = $fields[1];
	my $class = $fields[2];
	my $data = $fields[3];
	my @sents;
	$sents[0] = $data;
	if ($splitbysent==1) {
	   @sents = split(/\s*[.:]\s*/,$data);
	}
	my $left = "";
	my $right = "";
	my $inner = "";
	my $ngram1 = "";
	my $ngram2 = "";
	foreach my $sent (@sents) {
		if ($sent=~/(.*?)(<b>.+<\/b>)(.*)/) {
			$left = $1;
			my $innerall = $2;
			$right = $3;
			my @innertokens = split(/\s+/,$innerall);
			foreach my $innertoken (@innertokens) {
				if ($innertoken=~/<b>(.+?)<\/b>/) {
					$ngram1 .= " " . $1;
					$ngram2 .= " " . $1;
				}
				else {
					$ngram1 .= " " . $innertoken;
					$inner .= " " . $innertoken;
				}
			}
		}
	}
	my @lefts = split(/[\W]+/,$left);
	my @rights = split(/[\W]+/,$right);
	# for some reason we have a spurious first element in @rights.
	shift(@rights);
	$left = "";
	for (my $i=$contextsize; $i >0; $i--) {
		my $j = scalar(@lefts)-$i;
		if ($j>0) {
			$left .= " " . $lefts[$j];
		}
	}
	$right = "";
	for (my $i=0; $i<$contextsize;$i++) {
		if ($i < scalar(@rights)) {
			$right .= " " . $rights[$i];
		}
	}
	$ngram1 =~ s/[^\w\s]+/ /g;
	$ngram2 =~s/[^\w\s]+/ /g;
	my $context1 = $left . " " . $right;
	my $context2 = $left . " " . $inner . " " . $right;
	$context1=~s/\s+/ /g;
	$context2=~s/\s+/ /g;
	print OUT $id . "\t" . $ngramnorm . "\t" . $class . "\t" . $ngram1 . "\t" . $context1 . "\t" . $ngram2 . "\t" . $context2 . "\n";
}

close(IN);
close(OUT);