#**************************************************************
#  
#  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 par2script::work;

use par2script::existence;
use par2script::globals;
use par2script::remover;

############################################
# par2script working module
############################################

sub analyze_comma_separated_list
{
	my ($list, $listref) = @_;	# second parameter is optional

	my @list = ();
	my $locallistref;
	
	if (!( $listref )) { $locallistref = \@list; }
	else { $locallistref = $listref; }
	
	par2script::remover::remove_leading_and_ending_comma(\$list);
	par2script::remover::remove_leading_and_ending_whitespaces(\$list);

	while ( $list =~ /^\s*(.*?)\s*\,\s*(.*)\s*$/ )
	{
		my $oneentry = $1;
		$list = $2;
		par2script::remover::remove_leading_and_ending_whitespaces(\$oneentry);
		push(@{$locallistref}, $oneentry);
	}

	# the last entry

	par2script::remover::remove_leading_and_ending_whitespaces(\$list);
	push(@{$locallistref}, $list);

	return $locallistref;	
}

############################################
# setting list of include pathes
############################################

sub setincludes
{
	my ($list) = @_;
	
	# input is the comma separated list of include pathes
	
	my $includes = analyze_comma_separated_list($list);

	return $includes;
}

############################################
# setting list of all par files
############################################

sub setparfiles
{
	my ($filename) = @_;

	# input is the name of the list file
	$filename =~ s/\@//;	# removing the leading \@

	my $filecontent = par2script::files::read_file($filename);
	
	my @parfiles = ();
	my $parfilesref = \@parfiles;

	foreach ( @{$filecontent} ) { $parfilesref = analyze_comma_separated_list($_, $parfilesref); }

	return $parfilesref;	
}

############################################
# finding the correct include path
# for the par files
############################################

sub make_complete_pathes_for_parfiles
{
	my ($parfiles, $includes) = @_;

	my $oneparfile;

	foreach $oneparfile ( @{$parfiles} )
	{
		my $foundparfile = 0;
		my $includepath;
		
		foreach $includepath ( @{$includes} )
		{
			my $parfile = "$includepath/$oneparfile"; 

			if ( -f $parfile )
			{
				$foundparfile = 1;
				$oneparfile = $parfile;
				last;
			}
		}

		if ( ! $foundparfile )
		{
			die "ERROR: Could not find parfile ${$parfiles}[$i] in includes pathes: $par2script::globals::includepathlist !\n"; 	
		}	
	}
}

######################################################
# collecting one special item in the par files and 
# including it into the "definitions" hash
######################################################

sub collect_definitions
{
	my ($parfilecontent) = @_;
	
	my $multidefinitionerror = 0;
	my @multidefinitiongids = ();


	foreach $oneitem ( @par2script::globals::allitems )
	{
		my $docollect = 0;
		my $gid = "";
		my %allitemhash = ();
	
		for ( my $i = 0; $i <= $#{$parfilecontent}; $i++ )
		{
			my $line = ${$parfilecontent}[$i];
			
			if ( $line =~ /^\s*$oneitem\s+(\w+)\s*$/ )
			{
				$gid = $1;
				$docollect = 1;
			}
			else
			{
				$docollect = 0;			
			}

			if ( $docollect )
			{
				my $currentline = $i;
				my %oneitemhash;
			
				while (! ( ${$parfilecontent}[$currentline] =~ /^\s*End\s*$/i ) )
				{
					if ( ${$parfilecontent}[$currentline] =~ /^\s*(.+?)\s*\=\s*(.+?)\s*\;\s*$/ )	# only oneliner!
					{
						$itemkey = $1;
						$itemvalue = $2;
					
						if ( $oneitem eq "Directory" ) { if ( $itemkey =~ "DosName" ) { $itemkey =~ s/DosName/HostName/; } }
						if (( $oneitem eq "Directory" ) || ( $oneitem eq "File" ) || ( $oneitem eq "Unixlink" )) { if ( $itemvalue eq "PD_PROGDIR" ) { $itemvalue = "PREDEFINED_PROGDIR"; }}
						if (( $itemkey eq "Styles" ) && ( $itemvalue =~ /^\s*(\w+)(\s*\;\s*)$/ )) { $itemvalue = "($1)$2"; }

						$oneitemhash{$itemkey} = $itemvalue;
					}
						
					$currentline++;
				}

				# no hyphen allowed in gids -> cannot happen here because (\w+) is required for gids
				if ( $gid =~ /-/ ) { par2script::exiter::exit_program("ERROR: No hyphen allowed in global id: $gid", "test_of_hyphen"); }

				# test of uniqueness
				if ( exists($allitemhash{$gid}) )
				{
					$multidefinitionerror = 1;
					push(@multidefinitiongids, $gid);			
				}

				$allitemhash{$gid} = \%oneitemhash;
			}
		}

		$par2script::globals::definitions{$oneitem} = \%allitemhash;
	}

	if ( $multidefinitionerror ) {	par2script::exiter::multidefinitionerror(\@multidefinitiongids); }
	
	# foreach $key (keys %par2script::globals::definitions)
	# {
	#	print "Key: $key \n";
	#
	#	foreach $key (keys %{$par2script::globals::definitions{$key}})
	#	{
	#		print "\t$key \n";			
	#	}
	# }
}

######################################################
# Filling content into the script
######################################################

sub put_oneitem_into_script
{
	my ( $script, $item, $itemhash, $itemkey ) = @_;
	
	push(@{$script}, "$item $itemkey\n" );
	my $content = "";
	foreach $content (sort keys %{$itemhash->{$itemkey}}) { push(@{$script}, "\t$content = $itemhash->{$itemkey}->{$content};\n" ); }
	push(@{$script}, "End\n" );
	push(@{$script}, "\n" );
}

######################################################
# Creating the script
######################################################

sub create_script
{
	my @script = ();
	my $oneitem;
	
	foreach $oneitem ( @par2script::globals::allitems )
	{
		if ( exists($par2script::globals::definitions{$oneitem}) )
		{
			if ( $oneitem eq "Shortcut" ) { next; } # "Shortcuts" after "Files"

			if (( $oneitem eq "Module" ) || ( $oneitem eq "Directory" )) { write_sorted_items(\@script, $oneitem); }
			else { write_unsorted_items(\@script, $oneitem); }
		}
	}

	return \@script;	
}

######################################################
# Adding script content for the unsorted items
######################################################

sub write_unsorted_items
{
	my ( $script, $oneitem ) = @_;
	
	my $itemhash = $par2script::globals::definitions{$oneitem};

	my $itemkey = "";
	foreach $itemkey (sort keys %{$itemhash})
	{
		put_oneitem_into_script($script, $oneitem, $itemhash, $itemkey);
			
		# special handling for Shortcuts after Files
		if (( $oneitem eq "File" ) && ( exists($par2script::globals::definitions{"Shortcut"}) ))
		{
			my $shortcutkey;
			foreach $shortcutkey ( keys %{$par2script::globals::definitions{"Shortcut"}} )
			{
				if ( $par2script::globals::definitions{"Shortcut"}->{$shortcutkey}->{'FileID'} eq $itemkey )
				{
					put_oneitem_into_script($script, "Shortcut", $par2script::globals::definitions{"Shortcut"}, $shortcutkey);

					# and Shortcut to Shortcut also
					my $internshortcutkey;
					foreach $internshortcutkey ( keys %{$par2script::globals::definitions{"Shortcut"}} )
					{
						if ( $par2script::globals::definitions{"Shortcut"}->{$internshortcutkey}->{'ShortcutID'} eq $shortcutkey )
						{
							put_oneitem_into_script($script, "Shortcut", $par2script::globals::definitions{"Shortcut"}, $internshortcutkey);
						}
					}
				}
			}
		}
	}
}

######################################################
# Collecting all children of a specified parent
######################################################

sub collect_children
{
	my ( $itemhash, $parent, $order ) = @_;
	
	my $item;
	foreach $item ( keys %{$itemhash} )
	{
		if ( $itemhash->{$item}->{'ParentID'} eq $parent )
		{
			push(@{$order}, $item);
			my $newparent = $item;
			collect_children($itemhash, $newparent, $order);
		}	
	}
}

######################################################
# Adding script content for the sorted items
######################################################

sub write_sorted_items
{
	my ( $script, $oneitem ) = @_;
	
	my $itemhash = $par2script::globals::definitions{$oneitem};

	my @itemorder = ();
	my @startparents = ();

	if ( $oneitem eq "Module" ) { push(@startparents, ""); }
	elsif ( $oneitem eq "Directory" ) { push(@startparents, "PREDEFINED_PROGDIR"); }
	else { die "ERROR: No root parent defined for item type $oneitem !\n"; }

	# supporting more than one toplevel item
	my $parent;
	foreach $parent ( @startparents ) { collect_children($itemhash, $parent, \@itemorder); }
	
	my $itemkey;
	foreach $itemkey ( @itemorder ) { put_oneitem_into_script($script, $oneitem, $itemhash, $itemkey); }
}

#######################################################################
# Collecting all assigned gids of the type "item" from the modules
# in the par files. Using a hash!
#######################################################################

sub collect_assigned_gids
{
	my $allmodules = $par2script::globals::definitions{'Module'};

	my $item;	
	foreach $item ( @par2script::globals::items_assigned_at_modules )
	{		
		if ( ! exists($par2script::globals::searchkeys{$item}) ) { par2script::exiter::exit_program("ERROR: Unknown type \"$item\" at modules.", "collect_assigned_gids"); }

		my $searchkey = $par2script::globals::searchkeys{$item};
		
		my %assignitems = ();
		my $modulegid = "";
		
		foreach $modulegid (keys %{$allmodules} )
		{
			# print "Module $modulegid\n";
			# my $content = "";
			# foreach $content (sort keys %{$allmodules->{$modulegid}}) { print "\t$content = $allmodules->{$modulegid}->{$content};\n"; }
			# print "End\n";
			# print "\n";
						
			if ( exists($allmodules->{$modulegid}->{$searchkey}) )
			{
				my $list = $allmodules->{$modulegid}->{$searchkey};
				if ( $list =~ /^\s*\((.*?)\)\s*(.*?)\s*$/ ) { $list = $1; }
				else { par2script::exiter::exit_program("ERROR: Invalid module list: $list", "collect_assigned_gids"); }
				my $allassigneditems = par2script::converter::convert_stringlist_into_array_2($list, ",");

				my $gid;
				foreach $gid ( @{$allassigneditems} )
				{
					if ( exists($assignitems{$gid}) ) { $assignitems{$gid} = $assignitems{$gid} + 1; }
					else { $assignitems{$gid} = 1; }
				}				
			}
		}
		
		$par2script::globals::assignedgids{$item} = \%assignitems;
	}	
}

##################################################
# Collecting the content of all par files.
# Then the files do not need to be opened twice.
##################################################

sub read_all_parfiles
{
	my ($parfiles) = @_;

	my @parfilecontent = ();
	my $parfilename;

	foreach $parfilename ( @{$parfiles} )
	{
		my $parfile = par2script::files::read_file($parfilename);
		foreach ( @{$parfile} ) { push(@parfilecontent, $_); }
		push(@parfilecontent, "\n");
	}

	return \@parfilecontent;	
}

1;