package ILMT::HIN::PAN::POSTagger;
use strict;
use warnings;
use Dir::Self;
use Data::Dumper;
use IPC::Run qw(run);

my @dispatch_seq = (
    "ssf2tnt",
    "extra_features",
    "crf_test",
    "split",
    "tnt2ssf"
);

sub crf_test {
    my %par = @_;
    my $data = $par{'data'};
    my $result = "";
    run ["/usr/local/bin/crf_test", "-m", __DIR__ . "/POSTagger/models/300k_hin_postagger.model"], \$data, \$result;
    return $result;
}

sub split {
    my %par = @_;
    my $data = $par{'data'};
    my $result = "";
    open my $fh, '<', \$data  or die $!;
    while (my $line = <$fh>) {
        chomp($line);
        my @array = split (/[ \t]+/, $line);
        if ($#array > 0) {
            $result .= "$array[0] $array[14] $array[13]\n";
        } else {
            $result .= "\n";
        }
    }
    return $result;
}

sub ssf2tnt {
    my %par = @_;
    my $data = $par{'data'};
    my $result = "";
    open my $fh, '<', \$data  or die $!;
    while (my $line = <$fh>) {
        chomp($line);
        if ($line =~ /^\s*$/) { # if the line has all space charcters
            $result .= "\n";
            next;
        }
        $line=~s/[ ]+/___/g;
        my ($att1,$att2,$att3,$att4) = split (/[\t]+/, $line);
        if ($att1 =~ /\<.*/ || $att2 eq "((" || $att2 eq "))") {#unwanted lines
            next;
        }
        else {
            $result .= "$att2\t$att4\n";
        }
    }
    return $result;
}

sub extra_features {
    my %par = @_;
    my $data = $par{'data'};
    my $result = "";
    open my $fh, '<', \$data  or die $!;
    while (my $line = <$fh>)
    {
        chomp($line);
        if($line =~ /^\s*$/)  # if the line has all space charcters
        {
            $result .=  "\n";
            next;
        }
        my ($att1 , $att2) = split (/\s+/, $line);
        $result .=  "$att1 ";
        my @array=split(//,$att1);
        my $len=@array;
        if($len  < 3) # if the length of the word is less than 3 $result .=  LESS
        {
            $result .=  "LESS ";
        }
        else
        {
            $result .=  "MORE ";
        }
        if($len >= 4) # if the length of the word is less than 4 $result .=  LL which mean its not defined else print the last four charcters of the word
        {
            $result .=  $array[-4];
            $result .=  $array[-3];
            $result .=  $array[-2];
            $result .=  $array[-1];
        }
        else
        {
            $result .=  "LL"; # here LL means not defined
        }
        $result .=  " ";
        if($len >= 3 )
        {
            $result .=  $array[-3];
            $result .=  $array[-2];
            $result .=  $array[-1];
        }
        else
        {
            $result .=  "LL";
        }
        $result .=  " ";
        if($len >= 2)
        {
            $result .=  $array[-2];
            $result .=  $array[-1];
        }
        else
        {
            $result .=  "LL";
        }
        $result .=  " ";
        $result .=  $array[-1];
        $result .=  " ";
        if($len >= 7)
        {
            $result .=  $array[0];
            $result .=  $array[1];
            $result .=  $array[2];
            $result .=  $array[3];
            $result .=  $array[4];
            $result .=  $array[5];
            $result .=  $array[6];
        }
        else
        {
            $result .=  "LL";
        }
        $result .=  " ";
        if($len >= 6)
        {
            $result .=  $array[0];
            $result .=  $array[1];
            $result .=  $array[2];
            $result .=  $array[3];
            $result .=  $array[4];
            $result .=  $array[5];
        }
        else
        {
            $result .=  "LL";
        }
        $result .=  " ";
        if($len >= 5)
        {
            $result .=  $array[0];
            $result .=  $array[1];
            $result .=  $array[2];
            $result .=  $array[3];
            $result .=  $array[4];
        }
        else
        {
            $result .=  "LL";
        }
        $result .=  " ";
        if($len >= 4)
        {
            $result .=  $array[0];
            $result .=  $array[1];
            $result .=  $array[2];
            $result .=  $array[3];
        }
        else
        {
            $result .=  "LL";
        }
        $result .=  " ";
        if($len >= 3)
        {
            $result .=  $array[0];
            $result .=  $array[1];
            $result .=  $array[2];
        }
        else
        {
            $result .=  "LL";
        }
        $result .=  " ";
        if($len >= 2)
        {
            $result .=  $array[0];
            $result .=  $array[1];
        }
        else
        {
            $result .=  "LL";
        }
        $result .=  " ";
        $result .=  $array[0]; # so overall printing the first 1-7 charcters and last 1-4 charcters
        $result .=  " ";
        $result .=  "$att2\n";
    }
    return $result;
}

sub tnt2ssf {
    my %par = @_;
    my $data = $par{'data'};
    my $result = "";
    open my $fh, '<', \$data  or die $!;
    my $line = "";
    my $startFlag = 1;
    my $wno = 1;
    my $prevCTag = "";
    my $error = "";
    my $lno = 0;
    my $sno = 1;

    while($line = <$fh>)
    {
        if($wno==1)
        {
            $result .= "<Sentence id=\"$sno\">\n";
        }
        if($line =~ /^\s*$/)
        {
            $result .= "</Sentence>\n";
            $sno ++;
            $wno=1;
            next;
        }
        chomp($line);

        my @cols = split(/[ ]+/,$line);
        $cols[2]=~s/___/ /g;
        $result .= "$wno\t$cols[0]\t$cols[1]\t$cols[2]\n";
        $wno ++;
    }
    return $result;
}

sub process {
    my %args = @_;
    utf8::encode($args{"data"});
    foreach my $submodule (@dispatch_seq) {
        $args{'data'} = __PACKAGE__->can($submodule)->(%args);
    }
    utf8::decode($args{"data"});
    return $args{"data"};
}