use vars qw(@day_names);

my @short_day_names = ( "ma", "ti", "ke", "to", "pe", "la", "su" );

#my $pky_url = "http://www.pky.fi/lounaslistat";
my $pky_url = "http://www.pikante.fi/index.php/Pikante/lounaaksi-t%C3%A4n%C3%A4%C3%A4n.html";

my @restaurant_info = (
  [ "(TAYS) Finn-Medi", "$pky_url", "all", "middle" ],
  [ "(TAYS) Café Olive", "$pky_url", "all", "middle" ],
  [ "(TAYS) Ellipsi", "$pky_url", "all", "middle" ]
);

my ($parse_func, $day_id, $week);
my (@cur_day_foods, @week_foods);
my ($show_next_week, $content_title);

sub utf8_to_8859 {
  $_ = shift;

  s/ //g;
  s/é/é/g;
  s/ä/ä/g;
  s/ö/ö/g;
  s/Ä/Ä/g;
  s/Ö/Ö/g;
  return $_;
}

sub pky_finish_day {
  push @week_foods, [@cur_day_foods];
  @cur_day_foods = ();
  $day_id = $day_id + 1;
}

sub pky_parse_more_food {
  my $token = shift;
  
  if ($token->[0] eq 'T') {
    my $text = utf8_to_8859($token->[1]);
    foreach my $text (split("/", $text)) {
      push @cur_day_foods, $text if ($text ne "");
    }
  } elsif ($token->[0] eq 'E') {
    if ($token->[1] eq 'tr') {
      pky_finish_day();
      $parse_func = \&pky_parse_day_td;
    }
  }
}

sub pky_parse_day_td {
  my $token = shift;
  
  if ($token->[0] eq 'E') {
    if ($token->[1] eq 'td') {
      $parse_func = \&pky_parse_more_food;
    } elsif ($token->[1] eq 'table') {
      $parse_func = \&pky_parse_to_week;
    }
  } elsif ($token->[0] eq 'T') {
    my $text = $token->[1];
    my $i = 0;
    foreach my $day (@short_day_names) {
      if ($text =~ /$day$/i) {
	while ($day_id < $i) {
	  push @week_foods, [ ];
	  $day_id++;
	}
	last;
      }
      $i++;
    }
  }
}

sub pky_parse_to_monday {
  my $token = shift;
  
  if ($token->[0] eq 'S' && $token->[1] eq 'tr') {
    $parse_func = \&pky_parse_day_td;
  } elsif ($token->[0] eq 'E' && $token->[1] eq 'table') {
    $parse_func = \&pky_parse_to_week;
  }
}

sub want_second_week {
  my $week = shift;

  return 1 if $day_id == 0; # week didn't start from beginning
  
  my @l = localtime;
  my $this_week = strftime("%V", @l);
  return $week == $this_week || ($l[6] == 6 && ($week%52)+1 == $this_week);
}

sub pky_parse_to_eof {
}

sub pky_parse_to_week {
  my $token = shift;
  
  if ($token->[0] eq 'T' && $token->[1] =~ /Viikko (\d+)/) {
    my $parsed_week = $1;
    # earlier version could have shown two tables for two weeks
    # sometimes. but the new version? dunno yet..
    #if ($week == 0 || $show_next_week) {
    if ($week == 0) {
      $week = $parsed_week;
      $day_id = 0;
      @cur_day_foods = ();
      @week_foods = ();
      $parse_func = \&pky_parse_to_monday;
    } else {
      $parse_func = \&pky_parse_to_eof;
    }
  }
}

sub pky_parse_to_title {
  my $token = shift;
  
  if ($token->[0] eq 'T') {
    my $text = utf8_to_8859($token->[1]);
    if ($text =~ /$content_title.*lounasaika/) {
      $parse_func = \&pky_parse_to_week;
    }
  }
}

sub parse_pky {
  my ($fname, $info_ref) = @_;
  my $p = HTML::TokeParser->new($fname) or die("Can't open file $fname");
  
  my $title = @{$info_ref}[0];
  $week = 0;
  
  $content_title = $title;
  $content_title =~ s/^\(TAYS\) //;

  $parse_func = \&pky_parse_to_title;
  while (my $token = $p->get_token) {
    &$parse_func($token);
  }
  return [ $title, "", $week, [ @week_foods ], $info_ref ];
}

sub get_pky_restaurants {
  my $use_old;
  ($use_old, $show_next_week) = @_;

  my $temp_fname = "pky.temp.html";
  if (!-f $temp_fname || !$use_old) {
    system("wget -q --timeout=10 -O $temp_fname.tmp '$pky_url' && mv $temp_fname.tmp $temp_fname");
  }
  
  my @restaurants = ();
  if (-f $temp_fname) {
    my $count = 0;
    foreach my $i (@restaurant_info) {
      my @info = @{$i};
      push @restaurants, parse_pky($temp_fname, \@info);
      $count++;
    }
  }
  return @restaurants;
}

1;