#!/usr/bin/perl

####################################################################################
# txt2ldml.pl:
# This tool invokes genldml and genrb to produce res files from xml files
# Author: Ram Viswanadha
#
####################################################################################
use File::Find;
use File::Basename;
use IO::File;
use Cwd;
use File::Copy;
use Getopt::Long;
use File::Path;
use File::Copy;

GetOptions(
           "--lib=s" => \$envVar,
           "--sourcedir=s" => \$sourceDir,
           "--destdir=s" => \$destDir,
           "--icuroot=s" => \$icuRoot,
           "--genldml=s" => \$genldml,
           "--genrb=s" => \$genrb,
	         "--ldml-only=s" => \$ldmlOnly,
           "--ignore-collation" => \$ignoreCollation, 
		       "--base=s" => \$baseFile,
           "--ignore-specials" => \$ignoreSpecials,
           "--ignore-layout" => \$ignoreLayout,
           "--draft"  => \$draft,
           "--only-specials" => \$onlySpecials,
          );
           

usage() unless defined $sourceDir;
usage() unless defined $destDir;
usage() unless defined $icuRoot;
usage() unless defined $genldml;

getPathToGenrb() unless defined $genrb;
								
# create a temp directory and copy all the txt files there
my $tempDir = $destDir."/temp";
mkpath($tempDir);
my $prefix;
my $tempPackage="LDMLTestPackage";
# set up environment 
if($$^O =~ /win/){
    $prefix ="";
    cmd("set PATH=%PATH%;$icuRoot/bin;");
}else{
    $prefix ="$ldVar=$ICU_ROOT/source/common:$ICU_ROOT/source/i18n:$ICU_ROOT/source/tools/toolutil:$ICU_ROOT/source/data/out:$ICU_ROOT/source/data: "
}

# create list of xml files
my @list;
if (@ARGV) {
    @list = @ARGV;
    foreach (@list) { $_ .= ".txt" unless (/\.txt$/i); }
} else {
    opendir(DIR,$sourceDir);
    @list = grep{/\.txt$/} readdir(DIR);
    closedir(DIR);
}

# creating res files and LDML files 
# cannot be combined in one step
# since there may be dependencies while building
# the res files which may not be resolved until
# all files are built

# Step 1: create *.res files
foreach $item (@list){
    next if($item eq "." || $item eq "..");
    resify($item) unless defined $ldmlOnly;
}

# Step 2:  create *.xml files
foreach $item (@list){
    next if($item eq "." || $item eq ".." );
    $txt = $item;;
    $txt =~ s/\.txt$//i;
    ldmlify($txt);
}

# run the xmlify converter
sub ldmlify{
    my $infile = shift;
    my $genldmlExec = $genldml."/genldml";
    my $ic ="";
    my $is ="";
    my $il ="";
    my $base = "";
    my $baseTyp = "";
    my $id = "";
    my $os = "";
    if (defined $ignoreCollation){
        $ic = "--ignore-collation";
    }
    if (defined $ignoreSpecials){
        $is = "--ignore-specials";
    }
    if(defined $ignoreLayout){
        $il = "--ignore-layout";
    }
    if(defined $draft){
        $id = "--draft";
    }
    if(defined $onlySpecials){
        $os = "--only-specials";
    }
    if(defined $baseFile){
        $baseLoc = getBaseLocale($baseFile, $infile);
        $base = "--base $baseLoc";
        
        # Commented out because currently we don't need to 
        # pass in the type argument to genldml
        # can be uncommented if needed
        #$baseLoc = getBaseType ($baseFile, $infile);
        #if(baseLoc ne ""){
        #    $baseTyp ="--base-type $baseLoc";
        #}
        
    }
    
    cmd("$prefix $genldmlExec --sourcedir $tempDir --destdir $destDir --package $tempPackage $base $baseTyp $ic $il $is $id $os $infile");
}

sub getBaseLocale(){
    my $basefile = shift;
    my $locale = shift;
    $baseFH = IO::File->new($basefile,"r")
            or die  "could not open the file $basefile for reading: $! \n";
    while(defined ( $line = <$baseFH>)){
        if( $line =~ /^\<$locale\>/){
            ($loc,$bse) = split (/\>/, $line);
             $bse =~ s/^\s+\<//;
             return $bse;
        }
    }
}

#------------------------
# This method is commented out for now
# can be uncommented if we need to pass baseType argument to 
# genldml. Currently we don't need this feature
# P.S: Not tested.
#--------------------------
#sub getBaseType(){
#    my $basefile = shift;
#    my $locale = shift;
#    $baseFH = IO::File->new($basefile,"r")
#            or die  "could not open the file $basefile for reading: $! \n";
#    while(defined ( $line = <$baseFH>)){
#        if( $line =~ /\<$locale\>/){
#            ($loc,$bse) = split (/\>/, $line);
#             $bse =~ s/^\s+\<//;
#             return $bse;
#        }
#    }
#}

# run genrb 
sub resify{
    my $infile = shift;
    my $genrbExec = $genrb."/genrb";

    cmd("$prefix $genrbExec --sourcedir $sourceDir --package-name $tempPackage --destdir $tempDir --encoding UTF8 $infile");
}

#
sub getPathToGenrb{
    $genrb = $icuRoot."/bin";
}

#-----------------------------------------------------------------------
# Execute a command
# Param: Command
# Param: Display line, or '' to display command
sub cmd {
    my $cmd = shift;
    my $prompt = shift;
    $prompt = "Command: $cmd.." unless ($prompt);
    print $prompt."\n";
    system($cmd);
    my $exit_value  = $? >> 8;
    #my $signal_num  = $? & 127;
    #my $dumped_core = $? & 128;
    if ($exit_value == 0) {
        print "ok\n";
    } else {
        ++$errCount;
        print "ERROR ($exit_value)\n";
        exit(1);
    }
}

#-----------------------------------------------------------------------
sub usage {
    print << "END";
Usage:
txt2ldml.pl 
Options:
        --lib=<environment variable for lib path> 
        --sourcedir=<directory> 
        --destdir=<directory>
        --icuroot=<path to ICU's root directory> 
        --genldml=<path to genldml executatble>
        --genrb=<path to genrb executatble>
        --ignore-collation
        --base=<the text file that contains the base to locale mapping including the path>
        --ignore-layout
        --ignore-specials
        --only-specials
        --draft

txt2ldml creates *.xml file from *.txt files by invoking the respective tools
Optionally, one or more locales may be specified on the command line.
If this is done, only those locales will be processed.  If no locales
are listed, all locales are processed.

END
  exit(0);
}