<?php
/**
 * ActivityPub Transformer for the plugin Very Simple Event List.
 *
 * @package activity-event-transformers
 * @license AGPL-3.0-or-later
 */

use EM_Event;

use Activitypub\Activity\Event;
use Activitypub\Activity\Place;
use Activitypub\Transformer\Post;
use Activitypub\Model\Blog_user;
use function Activitypub\get_rest_url_by_path;

if ( ! defined( 'ABSPATH' ) ) {
	exit; // Exit if accessed directly.
}

/**
 * ActivityPub Transformer for events from the WordPress plugin 'Events Manager'
 * 
 * @see https://wordpress.org/plugins/events-manager/
 *
 * @since 1.0.0
 */
class Events_Manager extends Post {
	/**
	 * Holds the EM_Event object.
	 * 
	 * @var EM_Event
	 */
	protected $em_event;

	/**
	 * Get transformer name.
	 *
	 * Retrieve the transformers name.
	 *
	 * @since 1.0.0
	 * @access public
	 * @return string Widget name.
	 */
	public function get_transformer_name() {
		return 'activitypub-event-transformers/events-manager';
	}

	/**
	 * Get transformer title.
	 *
	 * Retrieve the transformers label.
	 *
	 * @since 1.0.0
	 * @access public
	 * @return string Widget title.
	 */
	public function get_transformer_label() {
		return 'Events Manager';
	}

	/**
	 * Get supported post types.
	 *
	 * Retrieve the list of supported WordPress post types this transformer widget can handle.
	 *
	 * @since 1.0.0
	 * @access public
	 * @return array Widget categories.
	 */
	public static function get_supported_post_types() {
		return array();
	}

	/**
	 * Returns the ActivityStreams 2.0 Object-Type for an Event.
	 *
	 * @see https://www.w3.org/TR/activitystreams-vocabulary/#dfn-event
	 * @since 1.0.0
	 * @return string The Event Object-Type.
	 */
	protected function get_type() {
		return 'Event';
	}

	/**
	 * Get the event location.
	 *
	 * @param int $post_id The WordPress post ID.
	 * @return array The Place.
	 */
	public function get_location() {
		$location = new Place();
		$em_location = $this->em_event->get_location();

		$location->set_name( $em_location->location_name );
		$location->set_address( array(
			'type' => 'PostalAddress',
			'addressCountry' => $em_location->location_country,
			'addressLocality' => $em_location->location_town,
			'streetAddress' => $em_location->location_address,
			'name' => $em_location->location_name,
		));
		return $location;
	}

	/**
	 * Get the end time from the events metadata.
	 */
	protected function get_end_time() {
		return null;
	}

	/**
	 * Get the end time from the events metadata.
	 */
	protected function get_start_time() {
		$date_string = $this->em_event->event_start_date;
		$time_string = $this->em_event->event_start_time;
		$timezone_string = $this->em_event->event_timezone;

		// Create a DateTime object with the given date, time, and timezone
		$datetime = new DateTime($date_string . ' ' . $time_string, new DateTimeZone($timezone_string));

		// Set the timezone for proper formatting
		$datetime->setTimezone(new DateTimeZone('UTC'));

		// Format the DateTime object as 'Y-m-d\TH:i:s\Z'
		$formatted_date = $datetime->format('Y-m-d\TH:i:s\Z');
		return $formatted_date;
	}

	protected function get_maximum_attendee_capacity() {
		return $this->em_event->event_spaces;
	}

	/**
	 * @todo decide whether to include pending bookings or not!
	 */
	protected function get_remaining_attendee_capacity() {
		$em_bookings = $this->em_event->get_bookings()->get_bookings();
		$remaining_attendee_capacity = $this->em_event->event_spaces - count( $em_bookings->bookings );
		return $remaining_attendee_capacity;
	}

	protected function get_participant_count() {
		$em_bookings = $this->em_event->get_bookings()->get_bookings();
		return count( $em_bookings->bookings );
	}
	 
	protected function get_content() {
		return $this->wp_object->post_content;
	}

	protected function get_summary() {
		if ( $this->em_event->post_excerpt ) {
			$excerpt = $this->em_event->post_excerpt;
		} else {
			$excerpt = $this->get_content();
		}

		$address = $this->em_event->get_location()->location_name;

		$start_time = $this->get_start_time();

		$datetime_format = get_option( 'date_format' ) . ' ' . get_option( 'time_format' );
		$start_time_string = wp_date( $datetime_format, $start_time );
		$summary = "📍 {$address}\n📅 {$start_time_string}\n\n{$excerpt}";
		return $summary;
	}

	/**
	 * Overrides/extends the get_attachments function to also add the event Link.
	 */
	protected function get_attachment() {
		return null;
	}

	/**
	 * This function tries to map VS-Event categories to Mobilizon event categories.
	 *
	 * @return string $category
	 */
	protected function get_category() {
		return null;
	}

	/**
	 * Transform the WordPress Object into an ActivityPub Object.
	 *
	 * @return Activitypub\Activity\Event
	 */
	public function to_object() {
		$this->em_event = new EM_Event( $this->wp_object->ID, 'post_id');
		$activtiypub_object = new Event();

		$activtiypub_object = $this->transform_object_properties( $activtiypub_object );

		return $activtiypub_object;
	}
}