use vars qw(@day_names);

# erkkeri is gone - could remove a lot of this ugliness

my $erkkeri_title = "(TTY) Amica Erkkeri";
my @restaurant_info = (
  [ "(TaY) Amica Minerva", "http://www.amica.fi/minerva", "", "middle" ]
  #[ $erkkeri_title, "http://www.amica.fi/erkkeri", "", "left" ]
);

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

sub amica_parse_to_eof {
}

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

sub utf8_to_8859 {
  $_ = shift;

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

sub amica_parse_line {
  my $text = shift;
  
  $text =~ tr/\r\n\t/   /;
  $text =~ s/( | )*$//;
  $text =~ s/ *(\d+,\d+ *\/ *)?\d+,\d+ *$//;
  $text =~ s/^( | )*//;
  $text =~ s/( | )*$//;
  $text =~ s/valinnan mukaan$//;
  if ($text =~ /^(.*) \(([^\)]+)\)$/) {
    my ($name, $allergy) = ($1, $2);
    $name =~ s/( )*$//;
    $allergy =~ s/\*veg\./ eriks: Ve/g;
    $allergy =~ s/veg/Ve/gi;
    $allergy =~ s/\*([A-Z]+)/ eriks: $1/;
    return "$name ($allergy)\n";
  } elsif ($text ne "") {
    return "$text\n";
  }
  return "";
}

sub amica_parse_split {
  my $text = shift;
  
  my $food = "";
  for (;;) {
    $i = index($text, ")");
    last if ($i == -1);
    
    my $line = substr($text, 0, $i + 1);
    $food .= amica_parse_line($line);
    $text = substr($text, $i + 1);
  }
  $food .= amica_parse_line($text);
  push @cur_day_foods, $food if ($food ne "");
}

sub amica_parse_more_food {
  my $token = shift;
  
  if ($token->[0] eq 'T') {
    my $text = utf8_to_8859($token->[1]);
    my $next_day_name = $day_names[$day_id+1];
    
    if ($day_id < 6 && $text =~ /^$next_day_name\b/i) {
      # day changed
      amica_finish_day();
    } else {
      amica_parse_split($text);
    }
  } elsif ($token->[0] eq 'S' && $token->[1] eq 'h2') {
    amica_finish_day();
    $parse_func = \&amica_parse_to_eof;
  }
}

sub amica_parse_first_day {
  my $token = shift;
  
  if ($token->[0] eq 'T') {
    for ($day_id = 0; $day_id < 7; $day_id++) {
      my $dayname = $day_names[$i];
      last if ($token->[1] =~ /^$dayname\b/i);
    }
    $day_id = 0 if ($day_id == 7);
    $parse_func = \&amica_parse_more_food;
  }
}

sub amica_parse_to_start {
  my $token = shift;
  
  if ($token->[0] eq 'S' && $token->[1] eq 'p') {
    $parse_func = \&amica_parse_first_day;
  }
}

sub get_week {
  my ($mday, $mon) = @_;

  my @l = localtime;
  my @l2 = (0, 0, 0, $mday, $mon-1, $l[5], 0, 0, -1);
  @l = localtime(mktime(@l2));
  return strftime("%V", @l);
}

sub amica_parse_date {
  my $token = shift;
  
  if ($token->[0] eq 'T') {
    my $text = $token->[1];
    if ($text =~ /^(\d\d\d\d)-(\d?\d)-(\d?\d) /) {
      my ($mday, $mon) = ($3, $2);
      $week = get_week($mday, $mon);
    }
  } elsif ($token->[0] eq 'E' && $token->[1] eq 'h2') {
    $parse_func = \&amica_parse_to_start;
  }
}

sub amica_parse_to_date {
  my $token = shift;
  
  if ($token->[0] eq 'S' && $token->[1] eq 'h2') {
    my %attrs = %{$token->[2]};
    if ($attrs{'id'} =~ /HeadingMenu/) {
      $parse_func = \&amica_parse_date;
    }
  }
}

sub parse_amica {
  my ($fname, $info_ref) = @_;
  my $p = HTML::TokeParser->new($fname) or die("Can't open file $fname");
  my $title = @{$info_ref}[0];
  
  $week = "";
  $day_id = 0;
  @cur_day_foods = ();
  @week_foods = ();

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

sub parse_amica_get_finnish_url {
  my ($fname) = @_;
  my $p = HTML::TokeParser->new($fname) or die("Can't open file $fname");

  my @l = localtime;
  my $this_week = strftime("%V", @l);

  my $state = 0;
  my $last_url = "";
  my $week = "";
  while (my $token = $p->get_token) {
    if ($token->[0] eq 'S' && $token->[1] eq 'meta') {
      my %attrs = %{$token->[2]};
      if ($attrs{'name'} eq "TITLE") {
        if ($attrs{'content'} =~ /(\d+)\.(\d+)\.? *- *(\d+)\.(\d+)/) {
          my ($mday, $mon) = ($1, $2);
          $week = get_week($mday, $mon);
        } elsif ($attrs{'content'} =~ /(\d+)\.? *- *(\d+)\.(\d+)/) {
          my ($mday, $mon) = ($1, $3);
          $week = get_week($mday, $mon);
        }
	return "" if ($attrs{'content'} !~ /English/i && $week == $this_week);
      }
    } elsif ($token->[0] eq 'S' && $token->[1] eq 'a') {
      my %attrs = %{$token->[2]};
      $last_url = $attrs{'href'};
    } elsif ($token->[0] eq 'T' && $token->[1] =~ /^ruokalista (\d+)\.(\d+)\.? *- *(\d+)\.(\d+)/i) {
      my ($mday, $mon) = ($1, $2);
      $week = get_week($mday, $mon);
      return $last_url if ($week == $this_week);
    } elsif ($token->[0] eq 'T' && $token->[1] =~ /^ruokalista (\d+)\.? *- *(\d+)\.(\d+)/i) {
      my ($mday, $mon) = ($1, $3);
      $week = get_week($mday, $mon);
      return $last_url if ($week == $this_week);
    } elsif ($token->[0] eq 'T' && $token->[1] =~ /^ruokalista (viikko|vko) (\d+)/i) {
      $week = $2;
      return $last_url if ($week == $this_week);
    }
  }
  return "";
}

sub parse_amica_url {
  my ($fname) = @_;
  my $p = HTML::TokeParser->new($fname) or die("Can't open file $fname");
  
  my $state = 0;
  while (my $token = $p->get_token) {
    if ($token->[0] eq 'S') {
      my %attrs = %{$token->[2]};
      if ($token->[1] eq 'td' && $attrs{'title'} eq 'Ruokalistat' && $state == 0) {
	$state = 1;
      } elsif ($token->[1] eq 'a' && $state == 1) {
	return $attrs{'href'};
      }
    }
  }
  return "";
}

sub get_amica_restaurant {
  my $use_old = shift;
  my $count = 0;
  my @restaurants = ();
  foreach my $i (@restaurant_info) {
    my @info = @{$i};
    my $temp_fname = "amica$count.temp.html";
    my $url = $info[1];
    if (!-f $temp_fname || !$use_old) {
      system("wget -q --timeout=10 -O $temp_fname.tmp '$url' && mv $temp_fname.tmp $temp_fname") if ($url ne "");
    }
    if (-f $temp_fname) {
      $info[1] = $url;
      push @restaurants, parse_amica($temp_fname, \@info);
    }
    $count++;
  }
  return @restaurants;
}

1;