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package par2script::work;

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 paths
############################################

sub setincludes
{
    my ($list) = @_;

    # input is the comma separated list of include paths

    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_paths_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 paths: $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 = ();

    my %itemhash;

    # create empty item hashes
    foreach $oneitem ( @par2script::globals::allitems ) {
    my %items;
        $par2script::globals::definitions{$oneitem} = \%items;
    }

    for ( my $i = 0; $i <= $#{$parfilecontent}; $i++ )
    {
    my $line = ${$parfilecontent}[$i];
    my $oneitem, $gid;

    $line =~ /^\s*$/ && next; # skip blank lines

    # lines should be well formed:
    if ($line =~ m/^\s*(\w+)\s+(\w+)\s*$/)
    {
        $oneitem = $1;
        $gid = $2;
    } else {
        chomp ($line);
        my $invalid = $line;
        $invalid =~ s/[\s\w]*//g;
        par2script::exiter::exit_program("ERROR: malformed par file, invalid character '$invalid', expecting <token> <gid> but saw '$line'", "test_par_syntax");
    }
#   print STDERR "line '$line' -> '$oneitem' '$gid'\n";

    # hunt badness variously
    if ( ! defined $par2script::globals::definitions{$oneitem} )
    {
        par2script::exiter::exit_program("ERROR: invalid scp2 fragment item type '$oneitem' in line: '$line'", "test_par_syntax");
    }

    # 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"); }

    my %oneitemhash;

    while (! ( ${$parfilecontent}[$i] =~ /^\s*End\s*$/i ) )
    {
        if ( ${$parfilecontent}[$i] =~ /^\s*(.+?)\s*\=\s*(.+?)\s*\;\s*$/ )  # 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;
        }
        $i++;
    }

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

    # test of uniqueness
    if ( defined ($par2script::globals::definitions{$oneitem}->{$gid}) )
    {
        $multidefinitionerror = 1;
        push(@multidefinitiongids, $gid);
    }

    $par2script::globals::definitions{$oneitem}->{$gid} = \%oneitemhash;
    }

    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 $item ( sort keys %{$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;
