<?php

function getCorrespondingSeasons($request) {
  $year = explode('-', $request['month'])[0];
  return page('programme')->children()->filter(
    fn ($season) => str_contains($season->title()->value(), $year)
  );
}

function getTimeDifference($start, $end) {
  $start = new DateTime($start);
  $end = new DateTime($end);

  $difference = $end->diff($start);

  return $difference->h . "h" . $difference->i;
}

return [
  'pattern' => '/month-dates.json',
  'method' => 'POST',
  'action' => function () {
    $jsonRequest = file_get_contents("php://input");
    $request = json_decode($jsonRequest, true);

    $dates = $request['dates'];
    $requestMonth = $request['month'];    

    $correspondingSeasons = getCorrespondingSeasons($request);    

    foreach ($correspondingSeasons->children() as $event) {

      $eventInfos = [
        "title" => $event->title()->value(),
        "place" => $event->place()->value(),
        "authors" => $event->authors()->value()
      ];

      if ($event->isMapadoEvent() == 'false') {
        foreach ($event->sessions()->toStructure() as $session) {
          
          $sessionMonth = $session->date()->toDate('Y-MM');
          if ($sessionMonth === $requestMonth) {
            $day = intval($session->date()->toDate('d'));
            $dates[$day]['sessions'][] = array_merge($eventInfos, [
              "color" => $event->color()->value(),
              "day" => $day,
              "time" => $session->time()->value(),
              "place" => $event->place()->value(),
              "duration" => $event->duration()->value(),
              "eventUrl" => $event->url(),
            ]);
          };
        }
      }
      
      if ($event->isMapadoEvent() == 'true') {     
        $request = createMapadoEventRequest($event);
        $mapadoEvent = fetchMapadoEvent($request);

        $duration = null;

        $sessionsToSave = [];

        foreach ($mapadoEvent->eventDateList as $session) {
          
          $sessionMonth = substr($session->startDate, 0, 7);          
          
          if ($sessionMonth === $requestMonth) {
            $day = intval(substr($session->startDate, 8, 2));
            $startTime = substr($session->startDate, 11, 5);
            $eventDateId = explode('/', $session->{'@id'});
            $eventDateId = $eventDateId[count($eventDateId) - 1];
            $ticketingUrl = option('ticketingUrl') . 'event/' . $mapadoEvent->slug . '?eventDate=' . $eventDateId;
            
            if (isset($session->endDate) && !$duration) {
              $endTime = substr($session->endDate, 11 , 5);
              $duration = getTimeDifference($startTime, $endTime);
            }
            
            $dates[$day]['sessions'][] = array_merge($eventInfos, [
              "color" => $event->color()->value(),
              "day" => $day,
              "time" => str_replace(':', 'h', $startTime),
              "duration" => $duration,
              "place" => $event->place()->value(),
              "eventUrl" => $event->url(),
              "ticketingUrl" => $ticketingUrl
            ]);
          }
        }

        saveMapadoEvent($mapadoEvent, $event);
      }
    }

    return json_encode($dates);
  }
];