#!/usr/bin/perl

#Reading command line arguments
use Getopt::Long "GetOptions";
$ENV{"LC_ALL"} = "C";
&GetOptions("help!"=>\$help,'mode=s' => \$mode,
		'path=s'=> \$path,
		'stype=s'=> \$stype,
		'slang=s'=>\$slang,
		'tlang=s'=>\$tlang,
	   );
print "Unprocessed by Getopt::Long\n" if $ARGV[0];

foreach (@ARGV) {
        print "$_\n";
        exit(0);
}


if($help eq 1)
{
        print "transliteration-3.4\n(27th Jan 2009 last modified on 8th December 2008)\n\n";
        print "usage : ./run-transliteration.pl --path=/home/transliteration-3.4 --stype=ssf --slang=hin --tlang=tel \n";
        print "or  ./run-transliteration.pl --path=/home/transliteration-3.4 --stype=text --slang=hin --tlang=tel \n";
        exit(0);
}

#Checking for each command line arguments
if($path eq "")
{
        print "Please Specify the Path as defined in --help\n";
        exit(0);

}
if($stype eq "")
{
        print "Please Specify the Source Language type in ssf/text as defined in --help\n";
        exit(0);
}
if($slang eq "")
{
        print "Please Specify the Language as defined in --help\n";
        exit(0);
}
if($tlang eq "")
{
        print "Please Specify the Language as defined in --help\n";
        exit(0);
}

my $bin=$path."/bin";

#Requiring Mapping modules of source language
require "$bin/$slang/utf2wx.pl";
require "$bin/$slang/wx2utf.pl";

#Requiring API
require "$path/API/feature_filter.pl";

#Requiring Mapping module of target language
require "$path/trans.pl";

while($line = <STDIN>)
{
	chomp ($line);
	#SSF Conversion
	if(($stype eq "ssf") or ($stype eq "SSF"))
        {
		($num,$lex,$pos,$fs) = split(/\t/,$line);
		$flag=0;
		#TKN Field Conversion
		#Checking "@" symbol
		if($lex=~/^\@.*/)
		{
			($sym,$lex)=split(/\@/,$lex); #Symbol extracted
			$flag=1;
		}	
		if($lex ne "((" and $lex ne "))")
		{
			#Conversion happens only when the input is starting with "@" symbol
			if($flag)
			{
				#Identifying source language
                		$srlang = &findlang($lex);
				#if intended source language is marathi set $srlang to marathi
				if(($slang eq "mar") and ($srlang eq "hin"))
		                {
        		                $srlang="mar";
                		}
				#Conversion happens only when the input is in source language specified by user
				if($srlang =~/$slang/)
				{
                	       	       	system("echo $lex > word");
					#Urdu to Hindi conversion
					if(($slang eq "urd") and ($tlang eq "hin"))
					{
						#Requiring Mapping module
						require "$bin/$slang/urd2hin.pl";
						#Conversion function call
						&urd2hin($path,"word","out_word");
						open(FILE2,"out_word");
		        	       		$lex_out = <FILE2>;
	        		               	chomp($lex_out);
						system("rm -f word out_word");
					}
					#Hindi to Urdu conversion
					elsif(($slang eq "hin") and ($tlang eq "urd"))
					{
						#Requiring Mapping module
						require "$bin/$tlang/hin2urd.pl";
						#Conversion function call
						&hin2urd($path,"word","out_word");
						open(FILE2,"out_word");
		        	       		$lex_out = <FILE2>;
	        		               	chomp($lex_out);
						system("rm -f word out_word");
					}
					else
					{
						#UTF -> WX conversion function call of source language
						&utf2wx($path,"word","out_word");
						open(FILE1,"out_word");
						$lex_out = <FILE1>;
						chomp($lex_out);
						#Bengla v->b mapping
						if($tlang eq "ben")
						{
							$lex_out=~s/v/b/g;
						}
						system("echo $lex_out > word");
						#WX -> UTF conversion function call of target language
						system("indictrans --source hin --target kan -i word > outword");
						open(FILE2,"outword");
		        		       	$lex_out = <FILE2>;
        		        	       	chomp($lex_out);
						system("rm -f word out_word");
						system("rm -f word outword");
					}
				}
				else{
					$lex_out=$lex;
				}
				#Reattaching "@" symbol
				$lex_out="@".$lex_out;
			}
			else
			{
				$lex_out = $lex;
			}
		}	
		if($fs ne "")
		{
			#Feature Structure conversion
			@fss = split(/\|/,$fs);
			my $len = @fss;
			@string  = "";
			$newfs = "";
			my $i=0;
			foreach $af (@fss)
			{
				#Extraction of each fields using API
				my $FSreference = &read_FS($af,$line);
				my @lex_root = &get_values("lex",$FSreference);
				my @fs_vib = &get_values("vib",$FSreference);
				my @head_root = &get_values("head",$FSreference);
				my @name_root = &get_values("name",$FSreference);

				#Lexical field conversion
				foreach $field (@lex_root)
				{
					$flag1=0;
					#Checking "@" symbol
					if($field=~/^\@.*/)
	        			{
		                       		($sym,$field)=split(/\@/,$field); #Symbol extracted
                	        		$flag1=1;
	               			}
					#Conversion happens only when the input is starting with "@" symbol
					if($flag1)
			                {
						#Identifying source language
        	                		$srlang = &findlang($field);
						#if intended source language is marathi set $srlang to marathi
						if(($slang eq "mar") and ($srlang eq "hin"))
				                {
                        			        $srlang="mar";
			                	}
						#Conversion happens only when the input is in source language specified by user
						if($srlang =~/$slang/)
						{
							system("echo $field > word ");
							#Urdu to Hindi conversion
							if(($slang eq "urd") and ($tlang eq "hin"))
							{
								#Requiring Mapping module
								require "$bin/$slang/urd2hin.pl";
								#Conversion function call
								&urd2hin($path,"word","out_word");
								open(FILE2,"out_word");
		        	       				$val_out = <FILE2>;
			        		               	chomp($val_out);
								system("rm -f word out_word");
							}
							#Hindi to Urdu conversion
							elsif(($slang eq "hin") and ($tlang eq "urd"))
							{
								#Requiring Mapping module
								require "$bin/$tlang/hin2urd.pl";
								#Conversion function call
								&hin2urd($path,"word","out_word");
								open(FILE2,"out_word");
				        	       		$val_out = <FILE2>;
	        				               	chomp($val_out);
								system("rm -f word out_word");
							}
							else
							{
								#UTF -> WX conversion function call of source language
								&utf2wx($path,"word","out_word");
								open(FILE1,"out_word");
								$val_out = <FILE1>;
								chomp($val_out);
								#Bengla v->b mapping
								if($tlang eq "ben")
								{
									$val_out=~s/v/b/g;
								}
	               					       	system("echo $val_out > word");
								#WX -> UTF conversion function call of target language
        	               			        	system("indictrans --source hin --target kan -i word > outword");
                	               				open(FILE2,"outword");
	                	         			$val_out = <FILE2>;
			                	               	chomp($val_out);
								system("rm -f word out_word");
								system("rm -f word outword");
							}
						}
						else{
							$val_out=$field;
						}
						#Reattaching "@" symbol
						$val_out="@".$val_out;
						#updating the Lex field with new value using API
						my @lex_arr=();
						$val_out=~s/\@\./\./g;
						push @lex_arr,$val_out;
						&update_attr_val("lex", \@lex_arr,$FSreference,$af);
						$string[$i]=&make_string($FSreference,$af);
					}
					else
					{
						$val_out=$field;
						#updating the Lex field with same value using API
                	        	        my @lex_arr=();
                        	        	push @lex_arr,$val_out;
	                                	&update_attr_val("lex", \@lex_arr,$FSreference,$af);
        	                                $string[$i]=&make_string($FSreference,$af);
					}	
				}
				#Vibhakthi field conversion
	                        foreach $field (@fs_vib)
        	                {
                	        	$flag2=0;
					#Checking "@" symbol
					$temp_field=$field;
                        	        if(($field=~/^\@.*/)||($field=~/^-\@.*/))
                                	{
                                		($sym,$field)=split(/\@/,$field);#Symbol extracted
	                                        $flag2=1;
        	                        }
					#Conversion happens only when the input is starting with "@" symbol
                	                if($flag2)
                        	        {
						#Identifying source language
        	                		$srlang = &findlang($field);
						#if intended source language is marathi set $srlang to marathi
						if(($slang eq "mar") and ($srlang eq "hin"))
				                {
        	                		        $srlang="mar";
				                }
						#Conversion happens only when the input is in source language specified by user
						if($srlang=~/$slang/)
						{
							system("echo $field > word ");
							#Urdu to Hindi conversion
							if(($slang eq "urd") and ($tlang eq "hin"))
							{
								#Requiring Mapping module
								require "$bin/$slang/urd2hin.pl";
								#Conversion function call
								&urd2hin($path,"word","out_word");
								open(FILE2,"out_word");
		        	       				$val_out = <FILE2>;
			        		               	chomp($val_out);
								system("rm -f word out_word");
							}
							#Hindi to Urdu conversion
							elsif(($slang eq "hin") and ($tlang eq "urd"))
							{
								#Requiring Mapping module
								require "$bin/$tlang/hin2urd.pl";
								#Conversion function call
								&hin2urd($path,"word","out_word");
								open(FILE2,"out_word");
				        	       		$val_out = <FILE2>;
	        				               	chomp($val_out);
								system("rm -f word out_word");
							}
							else
							{
								#UTF -> WX conversion function call of source language
								&utf2wx($path,"word","out_word");
		        	                                open(FILE1,"out_word");
        		        	                        $val_out = <FILE1>;
                		        	                chomp($val_out);
								#Bengla v->b mapping
								if($tlang eq "ben")
								{
									$val_out=~s/v/b/g;
								}
                        		        	        system("echo $val_out > word");
								#WX -> UTF conversion function call of target language
                                		                system("indictrans --source hin --target kan -i word > outword");
                                        		       	open(FILE2,"outword");
	                                        		$val_out = <FILE2>;
	        	                                	chomp($val_out);
	        	                                	system("rm -f word out_word");
        	        	                        	system("rm -f word outword");
							}
						}
						else{
							$val_out=$field;
						}
						#Reattaching "@" symbol
						if($temp_field=~/^-/){
                                        	$val_out="-@".$val_out;
						}
						else{
                                        	$val_out="@".$val_out;
						}
	                                        $val_out=~s/\@\./\./g;
						#Updating vibhakthi field with new value using API
                        	                my @vib_arr=();
                                	        push @vib_arr,$val_out;
                                        	&update_attr_val("vib", \@vib_arr,$FSreference,$af);
	                                        $string[$i]=&make_string($FSreference,$af);
        	                        }
                	                else{
                        	                $val_out=$field;
						#Updating vibhakthi field with same value using API
                                	        my @vib_arr=();
                                        	push @vib_arr,$val_out;
	                                        &update_attr_val("vib", \@vib_arr,$FSreference,$af);
        	                                $string[$i]=&make_string($FSreference,$af);
                	                }
                        	}
				if(@head_root ne "")
				{
					#HEAD conversion
					foreach $field (@head_root)
					{
						$flag2=0;
						$flag3 = 0;
	                                       	if($field=~/^\"\@.*\"/)
        	                               	{
                	                               	$field=~s/\"//g;#Symbol extracted
                        	                       	$flag3 = 1;
                                	       	}
						#Checking "@" symbol
						if($field=~/^\@.*/)
	             			 	{
        	                			($sym,$field)=split(/\@/,$field);#Symbol extracted
	        	               			$flag2=1;
        	        			}
						#Conversion happens only when the input is starting with "@" symbol
						if($flag2)
		        	        	{
							#Identifying source language
        	                			$srlang = &findlang($field);
							#if intended source language is marathi set $srlang to marathi
							if(($slang eq "mar") and ($srlang eq "hin"))
				                        {
                	        			        $srlang="mar";
                        				}
							#Conversion happens only when the input is in source language specified by user
							if($srlang=~/$slang/)
							{
								system("echo $field > word ");
								#Urdu to Hindi conversion
								if(($slang eq "urd") and ($tlang eq "hin"))
								{
									#Requiring Mapping module
									require "$bin/$slang/urd2hin.pl";
									#Conversion function call
									&urd2hin($path,"word","out_word");
									open(FILE2,"out_word");
		        		       				$val_out = <FILE2>;
			        			               	chomp($val_out);
									system("rm -f word out_word");
								}
								#Hindi to Urdu conversion
								elsif(($slang eq "hin") and ($tlang eq "urd"))
								{
									#Requiring Mapping module
									require "$bin/$tlang/hin2urd.pl";
									#Conversion function call
									&hin2urd($path,"word","out_word");
									open(FILE2,"out_word");
				        		       		$val_out = <FILE2>;
	        					               	chomp($val_out);
									system("rm -f word out_word");
								}
								else
								{
									#UTF -> WX conversion function call of source language
									&utf2wx($path,"word","out_word");
									open(FILE1,"out_word");
									$val_out = <FILE1>;
									chomp($val_out);
									#Bengla v->b mapping
									if($tlang eq "ben")
									{
										$val_out=~s/v/b/g;
									}
	               			        			system("echo $val_out > word");
									#WX -> UTF conversion function call of target language
                        			       			system("indictrans --source hin --target kan -i word > outword");
		                               				open(FILE2,"outword");
			       	                  			$val_out = <FILE2>;
        		        	               			chomp($val_out);
									system("rm -f word out_word");
									system("rm -f word outword");
								}
							}
							else{
								$val_out=$field;
							}
							#Reattaching symbols
							$val_out="@".$val_out;
							if($flag3)
                                                	{
                                                        	$val_out = "\"".$val_out."\"";
	                                                }
							$val_out=~s/\@\./\./g;
							#Updation of HEAD with new value using API
							my @head_arr=();
							push @head_arr,$val_out;
							&update_attr_val("head", \@head_arr,$FSreference,$af);
							$string[$i]=&make_string($FSreference,$af);
						}
						else{
							$val_out=$field;
							#Updation of HEAD with old value using API
                                	                my @head_arr=();
                                        	       	push @head_arr,$val_out;
	                                        	&update_attr_val("head", \@head_arr,$FSreference,$af);
	        	                                $string[$i]=&make_string($FSreference,$af);
						}
					}
				}
				if(@name_root ne "")
				{
					#NAME conversion
					foreach $field (@name_root)
					{
						$flag2=0;
						$flag3 = 0;
	                                       	if($field=~/^\"\@.*\"/)
        	                               	{
                	                               	$field=~s/\"//g;#Symbol extracted
                        	                       	$flag3 = 1;
                                	       	}
						#Checking "@" symbol
						if($field=~/^\@.*/)
			      		 	{
			               			($sym,$field)=split(/\@/,$field); #Symbol extracted
			               			$flag2=1;
		        			}
						#Conversion happens only when the input is starting with "@" symbol
						if($flag2)
				        	{
							#Identifying source language
        	                			$srlang = &findlang($field);
							#if intended source language is marathi set $srlang to marathi
							if(($slang eq "mar") and ($srlang eq "hin"))
				                        {
                	        			        $srlang="mar";
				                        }
							#Conversion happens only when the input is in source language specified by user
							if($srlang=~/$slang/)
							{
								system("echo $field > word ");
								#Urdu to Hindi conversion
								if(($slang eq "urd") and ($tlang eq "hin"))
								{
									#Requiring Mapping module
									require "$bin/$slang/urd2hin.pl";
									#Conversion function call
									&urd2hin($path,"word","out_word");
									open(FILE2,"out_word");
		        		       				$val_out = <FILE2>;
			        			               	chomp($val_out);
									system("rm -f word out_word");
								}
								#Hindi to Urdu conversion
								elsif(($slang eq "hin") and ($tlang eq "urd"))
								{
									#Requiring Mapping module
									require "$bin/$tlang/hin2urd.pl";
									#Conversion function call
									&hin2urd($path,"word","out_word");
									open(FILE2,"out_word");
				        		       		$val_out = <FILE2>;
	        					               	chomp($val_out);
									system("rm -f word out_word");
								}
								else
								{
									#UTF -> WX conversion function call of source language
									&utf2wx($path,"word","out_word");
									open(FILE1,"out_word");
									$val_out = <FILE1>;
									chomp($val_out);
									#Bengla v->b mapping
									if($tlang eq "ben")
									{
										$val_out=~s/v/b/g;
									}
		        				               	system("echo $val_out > word");
									#WX -> UTF conversion function call of target language
		                				  	system("indictrans --source hin --target kan -i word > outword");
			                		    		open(FILE2,"outword");
				                		    	$val_out = <FILE2>;
			        	               			chomp($val_out);
									system("rm -f word out_word");
									system("rm -f word outword");
								}
							}
							else{
								$val_out=$field;
							}
							#Reattaching symbols
							$val_out="@".$val_out;
							if($flag3)
                                                	{
                                                		$val_out = "\"".$val_out."\"";
	                                                }
							$val_out=~s/\@\./\./g;
							#Updation of NAME with new value using API
							my @name_arr=();
							push @name_arr,$val_out;
							&update_attr_val("name", \@name_arr,$FSreference,$af);
							$string[$i]=&make_string($FSreference,$af);
			                	}
						else{
							$val_out=$field;
							#Updation of NAME with old value using API
		                	                my @name_arr=();
		                        	        push @name_arr,$val_out;
		                                	&update_attr_val("name", \@name_arr,$FSreference,$af);
			                                $string[$i]=&make_string($FSreference,$af);
						}
					}
				}
				$i++;
			}
			#Making New FS
			foreach $string (@string)
			{	
				if(--$len)
				{
					$newfs=$newfs.$string."|";
				}
				else{
					$newfs=$newfs.$string;
				}
			}
			#Clean up of Arrays
			delete @string[0..$#string];
			delete @lex_root[0..$#lex_root];
			delete @fss[0..$#fss];

			#Printing converted line
			if($line =~ /\(\(/ or $line =~ /\)\)/)
			{
				($num,$lex,$pos,$fs) = split(/\t/,$line);
				$lex=~s/\@\./\./g;
				print $num,"\t",$lex,"\t",$pos,"\t",$newfs,"\n";                       
			}
			else
			{
				$lex_out=~s/\@\./\./g;
				print $num,"\t",$lex_out,"\t",$pos,"\t",$newfs,"\n";
			}
		}
		else{
			if($lex ne "((" and $lex ne "))")
			{
				print $num,"\t",$lex_out,"\t",$pos,"\t",$fs,"\n";
			}
			else{
				print $line."\n";
			}
		}
	}
	#TEXT File conversion
        elsif(($stype eq "text") or ($stype eq "TEXT"))
        {
                @words = split(/\s/,$line);
                foreach $lex (@words)
                {
                        my $flag=0;
			#Symbols extraction
                        if($lex=~/^\@.*/)
                        {
                                ($sym,$lex)=split(/\@/,$lex);
                                print "\@";
                        }
                        elsif($lex=~/^\'.*/)
                        {
                                if($lex=~/^\'.*\'/)
                                {
                                        $symbol=1;
                                }
                                ($sym,$lex)=split(/\'/,$lex);
                                print "\'";
                        }
                        elsif($lex=~/^.*\'/)
                        {
                                ($lex,$sym)=split(/\'/,$lex);
                                $symbol=1;
                        }
                        elsif($lex=~/^\`.*/)
                        {
                                if($lex=~/^\`.*\`/)
                                {
                                        $symbol3=1;
                                }
                                ($sym,$lex)=split(/\`/,$lex);
                                print "\`";
                        }
                        elsif($lex=~/^.*\`/)
                        {
                                ($lex,$sym)=split(/\`/,$lex);
				$symbol3=1;
                        }
                        elsif($lex=~/^\(.*/)
                        {
                                ($sym,$lex)=split(/\(/,$lex);
                                print "\(";
                                if($lex=~/^.*\)/)
                                {
                                        ($lex,$sym)=split(/\)/,$lex);
                                        $symbol2 =1;
                                }
                        }
                        elsif($lex=~/^.*\)/)
                        {
                                ($lex,$sym)=split(/\)/,$lex);
                                $symbol2=1;
                        }
                        elsif($lex=~/^\".*/)
                        {
                                if($lex=~/^\".*\"/)
                                {
                                        $symbol1=1;
                                }
                                ($sym,$lex)=split(/\"/,$lex);
                                print "\"";
                        }
                        else{
                                if($lex=~/^.*\"/)
                                {
                                        ($lex,$sym)=split(/\"/,$lex);
                                        $symbol1=1;
                                }
                        }
			#Identifying source language
			$srlang = &findlang($lex);
			#if intended source language is marathi set $srlang to marathi
                        if(($slang eq "mar") and ($srlang eq "hin"))
                        {
                                $srlang="mar";
                        }
			if(($lex=~/^\|.*/) and (($slang eq "hin") or ($slang eq "mar")))
                        {
                                $lex=~s/\|/\./g;
                        }
			#Conversion happens only when the input is in source language specified by user
                        if($srlang =~/$slang/)
                        {
                                system("echo $lex > word");
				#Urdu to Hindi conversion
				if(($slang eq "urd") and ($tlang eq "hin"))
				{
					#Requiring Mapping module
					require "$bin/$slang/urd2hin.pl";
					#Conversion function call
					&urd2hin($path,"word","out_word");
					open(FILE2,"out_word");
		        	   	$lex_out = <FILE2>;
	        		        chomp($lex_out);
					system("rm -f word out_word");
				}
				#Hindi to Urdu conversion
				elsif(($slang eq "hin") and ($tlang eq "urd"))
				{
					#Requiring Mapping module
					require "$bin/$tlang/hin2urd.pl";
					#Conversion function call
					&hin2urd($path,"word","out_word");
					open(FILE2,"out_word");
		        	   	$lex_out = <FILE2>;
	        		        chomp($lex_out);
					system("rm -f word out_word");
					}
				else
				{
					#UTF -> WX conversion function call of source language
					&utf2wx($path,"word","out_word");
	                                open(FILE1,"out_word");
        	                        $lex_out = <FILE1>;
                	                chomp($lex_out);
					#Bengla v->b mapping
					if($tlang eq "ben")
					{
						$lex_out=~s/v/b/g;
					}
                        	        system("echo $lex_out > word");
					#WX -> UTF conversion function call of target language
                                	&trans($path,$tlang,"word","outword");
	                                open(FILE2,"outword");
        	                        $lex_out = <FILE2>;
                	                chomp($lex_out);
                        	        system("rm -f word out_word");
                                	system("rm -f word outword");
				}
                        }
                        else
                        {
                                $lex_out=$lex;
                        }
                        if(!$symbol and !$symbol1 and !$symbol2 and !$symbol3)
                        {
                                print $lex_out." ";
                        }
			#Reattaching symbols
                        elsif($symbol){
                                print $lex_out."\' ";
                        }
                        elsif($symbol2){
                                print $lex_out."\) ";
                        }
			elsif($symbol3){
                                print $lex_out."\` ";
                        }
                        else{
                                print $lex_out."\" ";
                        }
                        $symbol =0;
                        $symbol1 =0;
                        $symbol2 =0;
                        $symbol3 =0;
                        $flag = 0 ;
                }
                print "\n";
        }
}

#Module to find the source language
#Language is determined by the unicode value of first letter(ignoring numbers and _) of the word
sub findlang
{
        $infile =$_[0];
        system("echo $_[0] > lanword");
        open(FILE, "<:utf8", "lanword");
        $word = <FILE>;
	if($word=~/([0-9]+\_)(.*)/)
        {
                $word=$2;
        }
        @letter = split(//,$word);
        $val = ord($letter[0]);
        system("rm -f lanword");

        if($val >= 2304 and $val <= 2431)
        {
                $result = "hin";
        }
        elsif($val >= 2432 and $val <= 2559)
        {
                $result = "ben";
        }
        elsif($val >= 2560 and $val <= 2659)
        {
                $result = "pan";
        }
        elsif($val >= 2944 and $val <= 3071)
        {
                $result = "tam";
        }
        elsif($val >= 3072 and $val <= 3199)
        {
                $result = "tel";
        }
        elsif($val >= 3200 and $val <= 3327)
        {
                $result = "kan";
        }
        elsif($val >= 3328 and $val <= 3455)
        {
                $result = "mal";
        }
	elsif($val >= 1536 and $val <= 1791)
	{
		$result = "urd";
        }
        else
        {
                $result = "eng";
        }
        return $result;
}