<?php

class EventPage extends Page {
  public function schedule() {
    $sessions = $this->isMapadoEvent() != 'true' ? $this->sessions()->toStructure() : $this->remoteSessions()->toStructure();
    
    if ($sessions->isEmpty()) {
      return '';
    }

    try {
      $firstSession = $sessions->first()->date();
      $lastSession = $sessions->last()->date();
    } catch (\Throwable $th) {
      throw new Exception('Can\'t define sessions for event "' . $this->title()->value() . '".', 1);
    }

    $startDay = intval($firstSession->toDate('d'));
    $startMonth = $firstSession->toDate('MMMM');
    $endDay = intval($lastSession->toDate('d'));
    $endMonth = $lastSession->toDate('MMMM');

    $isSameMonth = $firstSession->toDate('y-M') === $lastSession->toDate('y-M');
    $isSameDay = $firstSession->toDate('d') === $lastSession->toDate('d');

    if ($isSameMonth) {
      if ($isSameDay) {
        return $startDay . ' ' . $endMonth;
      } else {
        return $startDay . ' - ' . $endDay . ' ' . $endMonth;
      }
    } else {
      return $startDay . ' ' . $startMonth . ' - ' . $endDay . ' ' . $endMonth;
    }
  }
}