use vars qw(@day_names);
use JSON;

my $pinni_title = "(TaY) Café Pinni";
my $bio_title = "(TAYS) Bio";
my $kliininen_title = "(TAYS) Arvo";
my $kliininen_fusion_title = "(TAYS) Arvo Fusion Kitchen";
my $zip_salaattibaari_title = "(TTY) Zip Salaattibaari";
# last two in order are $kitchen_info_id, $menu_type_id
my @restaurant_info = (
  [ "(TaY) Yliopiston Ravintola", "http://www.juvenes.fi/fi-fi/ravintolatjakahvilat/opiskelijaravintolat/tayp%C3%A4%C3%A4kampus/yliopistonravintola.aspx", "M", "left", 13, 60 ],
  [ "(TaY) Yliopiston Ravintola / Salaattibaari", "http://www.juvenes.fi/fi-fi/ravintolatjakahvilat/opiskelijaravintolat/tayp%C3%A4%C3%A4kampus/yliopistonravintola/salaattibaari.aspx", "", "left", 13, 5 ],
  [ "(TaY) Fusion Kitchen", "http://www.juvenes.fi/fi-fi/ravintolatjakahvilat/opiskelijaravintolat/tayp%C3%A4%C3%A4kampus/yliopistonravintola/fusionkitchen.aspx", "", "left", 13, 3 ],
  [ $pinni_title, "http://www.juvenes.fi/fi-fi/ravintolatjakahvilat/opiskelijaravintolat/tayp%C3%A4%C3%A4kampus/caf%C3%A9lunchpinni.aspx", "M", "middle", 130016, 60 ],
  [ $bio_title, "http://www.juvenes.fi/fi-fi/ravintolatjakahvilat/opiskelijaravintolat/taykaupinkampus/medicabio.aspx", "M", "left", 5, 60 ],
  [ $kliininen_title, "http://www.juvenes.fi/fi-fi/ravintolatjakahvilat/opiskelijaravintolat/taykaupinkampus/medicaarvo.aspx", "M", "left", 50026, 60 ],
  [ $kliininen_fusion_title, "http://www.juvenes.fi/fi-fi/ravintolatjakahvilat/opiskelijaravintolat/taykaupinkampus/medicaarvo/fusionkitchen.aspx", "M", "left", 50026, 3 ],
  [ "(TTY) Newton", "http://www.juvenes.fi/fi-fi/ravintolatjakahvilat/opiskelijaravintolat/ttykampus/newton.aspx", "", "left", 6, 60],
  [ "(TTY) Zip", "http://www.juvenes.fi/fi-fi/ravintolatjakahvilat/opiskelijaravintolat/ttykampus/zip.aspx", "", "right", 12, 60 ],
  [ "(TTY) Fusion Kitchen", "http://www.juvenes.fi/fi-fi/ravintolatjakahvilat/opiskelijaravintolat/ttykampus/newton/fusionkitchen.aspx", "", "left", 6, 3 ],
  [ "(TAMK) Dot", "http://www.juvenes.fi/fi-fi/ravintolatjakahvilat/opiskelijaravintolat/tamkdot.aspx", "", "middle", 110027, 60 ]
);

my @restaurants;
my ($open_hours, $day_id, $cur_title);
my ($cur_food, @cur_day_foods, @week_foods);

sub finish_food {
  chomp $cur_food;
  if ($cur_food =~ /Liha paniini.*tai Kasvis paniini/i && $cur_title eq $pinni_title) {
    # you get this every day, ignore
  } else {
    push @cur_day_foods, utf8_to_8859($cur_food) if ($cur_food ne "");
  }
  $cur_food = "";
}

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

sub can_merge_bio_kliininen {
  my $day = shift;

  my $bio_foods = "";
  my $kliininen_foods = "";
  my $food_dest;
  foreach my $r (@restaurants) {
    my ($title, $open_hours, $week, $week_foods_ref) = @{$r};
    if ($title eq $bio_title) {
      $food_dest = \$bio_foods;
    } elsif ($title eq $kliininen_title) {
      $food_dest = \$kliininen_foods;
    } else {
      next;
    }
    my @week_foods = @{$week_foods_ref};
    foreach my $food (@{$week_foods[$day]}) {
      ${$food_dest} .= "$food\n";
    }
  }
  return $bio_foods eq $kliininen_foods;
}

sub try_merge_bio_kliininen {
  my ($title_ref, $day) = @_;
  my $title = $$title_ref;

  if ($title eq $bio_title && can_merge_bio_kliininen($day)) {
    $$title_ref .= " + Kliininen";
  } elsif ($title eq $kliininen_title && can_merge_bio_kliininen($day)) {
    return 1;
  }
  return 0;
}

sub get_juvenes_restaurants {
  my $use_old = shift;
  my $count = 0;
  # Loops restraurants
  foreach my $i (@restaurant_info) {
    my @info = @{$i};
    my $kitchen = $info[4];
    my $menutype = $info[5];
    $title = $info[0];
    $cur_title = $title;
    $open_hours = "";
    @week_foods = ();
    my $week = `date +%V`;
    chomp($week);
    # Loop weekdays
    for (my $weekday = 1; $weekday < 7; $weekday++) {
      my $temp_fname = "juvenes$count-$weekday.temp.js";
      my $url = "http://www.juvenes.fi/DesktopModules/Talents.LunchMenu/LunchMenuServices.asmx/GetMenuByWeekday?KitchenId=$kitchen&MenuTypeId=$menutype&Week=$week&Weekday=$weekday&lang='fi'&format=json";
      if (!-f $temp_fname || !$use_old) {
        system("rm -f $temp_fname && wget -q --timeout=10 -O $temp_fname.tmp \"$url\" && mv $temp_fname.tmp $temp_fname");
      }
      if (-f $temp_fname) {
        open(FILE, $temp_fname);
        my $jsonp = do { local $/; <FILE> };
        close(FILE);
        # the file is encapsulated in ({"d": json}); so we have to double parse it
        my $data = from_json(substr($jsonp, 1, -2));
        unless ($data->{'d'} eq 'null') {
          $data = from_json($data->{'d'});
          my $mealoptions = $data->{'MealOptions'};
          # loop different meals
          foreach my $meal_info (@$mealoptions) {
            if ($meal_info->{'ForceMajeure'} ne '') {
              $cur_food = $meal_info->{'ForceMajeure'}; 
            } else {
              my $menuitems = $meal_info->{'MenuItems'};
              # loops different foods in a meal
              foreach my $food_info (@$menuitems) {
                $cur_food .= "\n" if $cur_food ne ""; 
                my $name = $food_info->{'Name'};
                $name =~ s/^\*//;
                $cur_food .= $name;
                $cur_food .= " (" . $food_info->{'Diets'} . ")" if $food_info->{'Diets'};
              }
            }
            if ($cur_food ne "-") {
              finish_food();
            } else {
              $cur_food = "";
            }
          }
        }
        finish_day();
      }
    }
    push @restaurants, [ $title, $open_hours, $week, [ @week_foods ], \@info ];
    $count++;
  }
  return @restaurants;
}

1;