#**************************************************************
#  
#  Licensed to the Apache Software Foundation (ASF) under one
#  or more contributor license agreements.  See the NOTICE file
#  distributed with this work for additional information
#  regarding copyright ownership.  The ASF licenses this file
#  to you under the Apache License, Version 2.0 (the
#  "License"); you may not use this file except in compliance
#  with the License.  You may obtain a copy of the License at
#  
#    http://www.apache.org/licenses/LICENSE-2.0
#  
#  Unless required by applicable law or agreed to in writing,
#  software distributed under the License is distributed on an
#  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
#  KIND, either express or implied.  See the License for the
#  specific language governing permissions and limitations
#  under the License.
#  
#**************************************************************


package pre2par::language;

use pre2par::existence;

##############################################################
# Returning a specific language string from the block
# of all translations
##############################################################

sub get_language_string_from_language_block
{
	my ($language_block, $language) = @_;
	
	my $newstring = "";

	for ( my $i = 0; $i <= $#{$language_block}; $i++ )
	{
	
		if ( ${$language_block}[$i] =~ /^\s*$language\s*\=\s*\"(.*)\"\s*$/ )
		{
			$newstring = $1;
			$newstring =~ s/\"/\\\"/g;	# masquerading all '"' in the string
			$newstring = "\"" . $newstring . "\"";
			last;
		}	
	}	
	
	# defaulting to english!
	
	if ( $newstring eq "" )
	{
		$language = "en-US"; 	# defaulting to english	
	
		for ( my $i = 0; $i <= $#{$language_block}; $i++ )
		{
			if ( ${$language_block}[$i] =~ /^\s*$language\s*\=\s*(\".*\")\s*$/ )
			{
				$newstring = $1;
				last;
			}
		}
	}
	
	return $newstring;
}

##############################################################
# Returning the complete block in all languages
# for a specified string
##############################################################

sub get_language_block_from_language_file
{
	my ($searchstring, $langfile) = @_;

	my @language_block = ();

	for ( my $i = 0; $i <= $#{$langfile}; $i++ )
	{		
		if ( ${$langfile}[$i] =~ /^\s*\[\s*$searchstring\s*\]\s*$/ )
		{
			my $counter = $i;

			push(@language_block, ${$langfile}[$counter]);
			$counter++;
			
			while (( $counter <= $#{$langfile} ) && (!( ${$langfile}[$counter] =~ /^\s*\[/ )))
			{
				push(@language_block, ${$langfile}[$counter]);
				$counter++;
			}
			
			last;
		}
	}	
	
	return \@language_block;
}

############################################
# collecting all replace strings
# in a language file
############################################

sub get_all_replace_strings
{
	my ($langfile) = @_;

	my @allstrings = ();
	
	for ( my $i = 0; $i <= $#{$langfile}; $i++ )
	{		
		if ( ${$langfile}[$i] =~ /^\s*\[\s*(.*?)\s*\]\s*$/ )
		{
			my $replacestring = $1;
			if (! pre2par::existence::exists_in_array($replacestring, \@allstrings))
			{
				push(@allstrings, $replacestring);
			}
		}
	}
	
	return \@allstrings;
}

############################################
# localizing the par file with the
# corresponding language file
############################################

sub localize
{
	my ($parfile, $langfile) = @_;

	my $allreplacestrings = get_all_replace_strings($langfile);	
	
	for ( my $i = 0; $i <= $#{$parfile}; $i++ )
	{
		my $oneline = ${$parfile}[$i];

		for ( my $j = 0; $j <= $#{$allreplacestrings}; $j++ )
		{
			if ( $oneline =~ /\b${$allreplacestrings}[$j]\b/ ) # Not for basic scripts
			{
				my $oldstring = ${$allreplacestrings}[$j];
				
				if ( $oneline =~ /^\s*\w+\s*\(([\w-]+)\)\s*\=/ )
				{
					my $language = $1; 	 # can be "01" or "en" or "en-US" or ...
					
					my $languageblock = get_language_block_from_language_file($oldstring, $langfile);
					my $newstring = get_language_string_from_language_block($languageblock, $language);

					if ( $newstring eq "" )	{ $newstring = "\"" . $oldstring . "\""; }
					
					$oneline =~ s/$oldstring/$newstring/g;
						
					${$parfile}[$i] = $oneline;
				}
			}
		}
	}	
}

1;