#!/usr/bin/perl

use strict;
use warnings;

# $Id$
use constant TAGS => qw{ul li code};
my %mods;
my @modDir = ("FHEM");
foreach my $modDir (@modDir) {
  opendir(DH, $modDir) || die "Cant open $modDir: $!\n";
  while(my $l = readdir DH) {
    next if($l !~ m/^\d\d_.*\.pm$/);
    my $of = $l;
    $l =~ s/.pm$//;
    $l =~ s/^[0-9][0-9]_//;
    $mods{$l} = "$modDir/$of";
  }
}


my @lang = ("EN", "DE");

foreach my $lang (@lang) {
  my $suffix = ($lang eq "EN" ? "" : "_$lang");
  my $docIn  = "docs/commandref_frame$suffix.html";
  my $docOut = "docs/commandref$suffix.html";

  open(IN, "$docIn")    || die "Cant open $docIn: $!\n";
  open(OUT, ">$docOut") || die "Cant open $docOut: $!\n";

  # First run: check what is a command and what is a helper module
  my $status;
  my %noindex;
  while(my $l = <IN>) {
    last if($l =~ m/<h3>Introduction/);
    $noindex{$1} = 1 if($l =~ m/href="#(.*)"/);
  }
  seek(IN,0,0);

  # Second run: create the file
  # Header
  while(my $l = <IN>) {
    print OUT $l;
    last if($l =~ m/#global/);
  }

  # index for devices.
  foreach my $mod (sort keys %mods) {
    next if($noindex{$mod});
    print OUT "      <a href='#$mod'>$mod</a> &nbsp;\n";
  }

  # Copy the middle part
  while(my $l = <IN>) {
    last if($l =~ m/name="perl"/);
    print OUT $l;
  }

  # Copy the doc part from the module
  foreach my $mod (sort keys %mods) {
    my $tag;
    my %tagcount= ();
    open(MOD, $mods{$mod}) || die("Cant open $mods{$mod}:$!\n");
    my $skip = 1;
    while(my $l = <MOD>) {
      if($l =~ m/^=begin html$suffix$/) {
        $l = <MOD>;    # skip one line, to be able to repeat join+split
        $skip = 0;
      } elsif($l =~ m/^=end html$suffix/) {
        $skip = 1;
      } elsif(!$skip) {
        # here we copy line by line from the module
        print OUT $l;
        foreach $tag (TAGS) {
          $tagcount{$tag}+= ($l =~ /<$tag>/i);
          $tagcount{$tag}-= ($l =~ /<\/$tag>/i);
        }
      }
    }
    close(MOD);
    foreach $tag (TAGS) {
      print("$lang $mods{$mod}: Unbalanced $tag\n") if($tagcount{$tag});
    }
  }

  # Copy the tail
  print OUT '<a name="perl"></a>',"\n";
  while(my $l = <IN>) {
    print OUT $l;
  }
  close(OUT);
}