use vars qw(@day_names);
use JSON;

my @restaurant_info = (
  [ "(TaY) Amica Minerva", "http://www.amica.fi/minerva", "", "middle", "http://www.amica.fi/api/restaurant/menu/week?language=fi&restaurantPageId=7381" ],
  [ "(TaY) Tampereen normaalikoulun ravintola", "http://www.amica.fi/tampereennormaalikoulu", "", "middle", "http://www.amica.fi/api/restaurant/menu/week?language=fi&restaurantPageId=6655" ],
  [ "(TTY) Ravintola Reaktori", "http://www.amica.fi/reaktori", "", "middle", "http://www.amica.fi/api/restaurant/menu/week?language=fi&restaurantPageId=69171" ]
);

sub utf8_to_8859 {
  $_ = shift;

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

sub parse_amica {
  my ($fname, $info_ref) = @_;
  open(FILE, $fname);
  my $json = do { local $/; <FILE> };
  close(FILE);
  
  my $title = @{$info_ref}[0];
  my $week = `date +%V`;
  my @cur_day_foods = ();
  my @week_foods = ();

  my $data = from_json($json);
  my $LunchMenus = $data->{'LunchMenus'};
  foreach my $LunchMenu (@$LunchMenus) {
    my $SetMenus = $LunchMenu->{'SetMenus'};
    my $Html = $LunchMenu->{'Html'};
    if (length($Html) > 0) {
      my @Menus = split('<p>', $Html);
      foreach my $SetMenu (@Menus) {
        my @Meals = split('<br />', $SetMenu);
	foreach my $Meal (@Meals) {
	  my @parts = split('\\(', $Meal);
	  $cur_food .= "\n" if $cur_food ne "";
	  $cur_food .= @parts[0];
	  my @Diets = split(",\s*", substr(@parts[1], 0, index(@parts[1], ')')));
	  $cur_food .= ' (' . join(', ', @Diets) . ')' if @Diets;
	}
        push @cur_day_foods, utf8_to_8859($cur_food) if ($cur_food ne "");
        $cur_food = "";
      }
    } else {
      foreach my $SetMenu (@$SetMenus) {
        my $Meals = $SetMenu->{'Meals'};
        foreach my $Meal (@$Meals) {
          $cur_food .= "\n" if $cur_food ne "";
          $cur_food .= $Meal->{'Name'};
          my $Diets = $Meal->{'Diets'};
          $cur_food .= ' (' . join(', ', @$Diets) . ')';
        }
        push @cur_day_foods, utf8_to_8859($cur_food) if ($cur_food ne "");
        $cur_food = "";
      }
    }

    push @week_foods, [@cur_day_foods];
    @cur_day_foods = ();
  }

  return [ $title, "", $week, [ @week_foods ], $info_ref ];
}

sub get_amica_restaurant {
  my $use_old = shift;
  my $count = 0;
  my @restaurants = ();
  my $weekDay = `date +%w`;
  chomp($weekDay);
  my $first_day = $weekDay == 1 
    ? `date --date="today" +%Y-%m-%d`
    : `date --date="last monday" +%Y-%m-%d`;
  chomp($first_day);
  my $last_day = $weekDay == 0
    ? `date --date="today" +%Y-%m-%d`
    : `date --date="next sunday" +%Y-%m-%d`;
  chomp($last_day);
  foreach my $i (@restaurant_info) {
    my @info = @{$i};
    my $temp_fname = "amica$count.temp.html";
    my $url = "${info[4]}&weekDate=$first_day";
    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[4] = $url;
      push @restaurants, parse_amica($temp_fname, \@info);
    }
    $count++;
  }
  return @restaurants;
}

1;