<?php

require_once 'participoLib/participo.php';
require_once 'participoLib/shiai.php';

/** Framework for a event
 */
class Event
{
	// members in the db
	private $id = null;       //< unique id of the event in the db
	private $date = null;     //< date for the event (@todo ranges?)
	private $shiaiId = null;  //< unique id of the shiai in the db (if appropriate)
	private $deadline = null; //< until when one can register for the event
	private $remarks = null;  //< remarks to the event (special rules) or a json object for missing data (e.g. non-shiai events)

	// linked data
	private $shiai = null;    //< a place to load the linked shiai to (if loaded)

	/** constructor
	 *
	 * @param int $id id in the database
	 * @param string $date date of the event as string in the format "YYYY-MM-DD"
	 * @param int $shiaiId id of the linked shiai or null if not appropriate
	 * @param string $deadline deadline for sign ins in the format "YYYY-MM-DD"
	 * @param string $remarks (json formatted) string with meta information
	 */
	public function __construct($id, $date, $shiaiId, $deadline, $remarks)
	{
		//! @todo InputValidation
		$this->id = filterId($id);
		$this->date = DateTime::createFromFormat('Y-m-d', $date);
		$this->shiaiId = filterId($shiaiId);
		$this->deadline = DateTime::createFromFormat('Y-m-d', $deadline);
		$this->remarks = $remarks;
	}

	// Getter

	/** Getter for the id
	 *
	 * @return (int) Id of the event
	 */
	public function getId()
	{
		return $this->id;
	}

	/** Getter for the date
	 *
	 * @return DateTime date of the event
	 */
	public function getDate()
	{
		return $this->date;
	}

	/** Getter for the shiaiId
	 *
	 * @return int>0 id for the shiai in the db
	 */
	public function getShiaiId()
	{
		return $this->shiaiId;
	}

	/** Getter for the deadline
	 *
	 * @return DateTime deadline for the event
	 */
	public function getDeadLine()
	{
		return $this->deadline;
	}

	/** Getter for the linked Shiai
	 *
	 * - lazy loading: only load if not already loaded (overridable by the $forceLoading param)
	 *
	 * @param boolean $forceLoading if true, the loading is enforced even if there already is a shiai linked
	 *
	 * @return Shiai reference to the linked Shiai
	 */
	public function shiai($forceLoading = false)
	{
		// We want to load if it isn't loaded yet or we want to enforce it. But in either case we need an id to load
		if ((!isset($this->shiai) || $forceLoading) && isset($this->shiaiId)) {
			$this->shiai = Shiai::loadFromDb($this->shiaiId);
		}
		return $this->shiai;
	}

	/** load the Event by id from the db
	 *
	 * - Frontend function: sanitizes the input and calls the backend function
	 *
	 * @param integer>0 $id id of the Event to load from the data base
	 * @return Event Event from the db with this id, null in case the Event couldn't be loaded
	 */
	public static function loadFromDb($id)
	{
		$id = filterId($id);
		if ($id) {
			return self::loadFromDbById($id);
		}
		return null;
	}

	/**
	 * loads an event from the db by id
	 *
	 * - Backend function, input is supposed to be sanitized
	 *
	 * @param integer>0 $id sanitized id of the event to load
	 * @return Event Event from the db with this id, null in case the Event couldn't be loaded
	 */
	private static function loadFromDbById(int $id)
	{
		$query = 'SELECT * FROM `cwsvjudo`.`wkParticipo_Events` WHERE `id` = :id;';
		$params = [':id' => ['value' => $id, 'data_type' => PDO::PARAM_INT]];
		$response = dbConnector::query($query, $params);

		// ids are considered unique. so every other count then 1 is treated as error to prevent unprivileged access
		if (count($response) != 1) {
			return null;
		}
		return self::fromDbArray($response[0]);
	}

	public function htmlDate($format = 'Y-m-d')
	{
		return $this->date->format($format);
	}

	public function htmlDeadLine($format = 'Y-m-d')
	{
		return $this->deadline->format($format);
	}

	/** Representation of an event as (materializeCss) card
	 *
	 * @return string string with the html code of the event
	 */
	public function asHtmlCard()
	{
		$shiai = $this->shiai();
		return
			'<div class="card blue-grey darken-1">' .
				'<div class="card-content white-text">' .
					'<span class="card-title">' . $shiai->getHtmlName() . '</span>' .
					'<dl>' .
						'<dt>Datum</dt>' .
						'<dd>' . $this->htmlDate() . '</dd>' .
						'<dt>Einschreibefrist</dt>' .
						'<dd>' . $this->htmlDeadLine() . '</dd>' .
						'<dt>Altersklassen</dt>' .
						'<dd>' . $this->shiai()->getHtmlDescriptiveAgeClasses() . '</dd>' .
					'</dl>' .
				'</div>' .
			'</div>';
	}

	public function getHtmlEventDetails()
	{
		$html .= '<dl>';
		$html .= '<dt>Datum</dt><dd>' . $this->event()->htmlDate() . '</dd>';
		$html .= '<dt>Deadline zum Einschreiben:</dt><dd>' . $this->event()->htmlDeadline() . '</dd>';
		$html .= '</dl>';
		$html .= $this->event()->shiai()->getHtml();
		$html .= $this->event()->getHtmlStarterStatistic();
		$html .= $this->event()->getHtmlStarterList();
	}

	public function htmlTableRow()
	{
		$shiai = $this->shiai();
		return
			'<tr>' .
				'<td>' . $this->htmlDate() . '</td>' .
				'<td><a href="/participo/events#' . $this->id . '" >' . $shiai->getHtmlName() . '</a></td>' .
				'<td>' . $shiai->getHtmlDescriptiveAgeClasses() . '</td>' .
				'<td><a class="waves-effect waves-light btn modal-trigger" href="#event-modal-' . $this->id . '"><i class="material-icons">zoom_in</i></a></td>' .
			'</tr>';
	}

	public function htmlModal()
	{
		$modal =
			'<div id="event-modal-' . $this->id . '" class="modal black-text">'
				. '<div class="modal-content">'
				. $this->shiai->getHtml()
				. '<hr />'
				. $this->getHtmlStarterStatistic()
				. '<hr />'
				. $this->getHtmlStarterList()
				. '<hr />';
		$modal .= '<div class="row">';
		$modal .= '<div class="s12">Deadline zum Eintragen: ' . $this->htmlDeadLine() . '</div>';

		$today = new DateTime();
		if (
			(isset($this->deadline) && ($today <= $this->deadline))
			|| participo::isUserAdmin($userData['id'])
		) {
			$kids = participo::getKids();
			foreach ($kids as $k) {
				$modal .= $this->getHtmlAddStarterForm($k, ['returnToUrl' => '/participo/events#' . $this->id]);
			}
		} else {
			$modal .= '<div>Es ist leider zu spät noch jemanden einzutragen!</div>';
		}
		$modal .= '</div>';

		$modal .=
				'</div>' . // end modal-content
				'<div class="modal-footer">' .
					'<a href="/pages/desktop/wkParticipo/showWkEvent.php?eventId=' . $this->id . '" class="modal-close waves-effect waves-green btn-flat">Zum Event im alten Planer</a>' .
					'<a href="#!" class="modal-close waves-effect waves-green btn-flat">Schließen</a>' .
				'</div>' . // end modal-footer
			'</div>';
		echo($modal);
	}

	/** Get the list of starters as html list */
	public function getHtmlStarterList()
	{
		$listOfStarter = $this->getStarter();

		if (!isset($listOfStarter) || count($listOfStarter) == 0) {
			return '';
		}
		$starterList .= 'Bereits eingetragen: <div class="row">';
		foreach ($listOfStarter as $start) {
			$startingUser = $start->loadStarter();
			$starterList .= '<div class="col s12 m6"><div class="row valign-wrapper">'
				. '<div class="col s6">' . $startingUser->getName() . ', ' . $startingUser->getFirstname() . ' (' . StartingType::$AsString[$start->getTypeId()] . '):</div>'
				. '<div class="col s6">' . $start->getHtmlFormRemove() . '</div>'
			. '</div></div>';
		}
		$starterList .= '</div>';
		return $starterList;
	}

	/** Returns the currents users starter to this event
	 *
	 * @todo docu
	 */
	public function getStarter()
	{
		$userId = $_SESSION['user']['userId'] ?? null;

		$query = 'SELECT `wkParticipo_Starter`.`id` as `starterId` FROM `wkParticipo_Starter` '
			. 'LEFT JOIN `vormundschaft` ON `vormundschaft`.`kidId` = `wkParticipo_Starter`.`userId` '
		. ' WHERE `wkParticipo_Starter`.`eventId` = :eventId AND `vormundschaft`.`userId` = :userId;';
		$params = [
			':eventId' => ['value' => $this->id, 'data_type' => PDO::PARAM_INT],
			':userId' => ['value' => $userId,   'data_type' => PDO::PARAM_INT]
		];
		$response = dbConnector::query($query, $params);

		$starter = [];
		foreach ($response as $r) {
			$starter[$r['starterId']] = Starter::loadFromDb($r['starterId']);
		}
		return $starter;
	}

	/** get number of starters of a certain type for this event
	 *
	 * @param int $startingType it representation of the StartingType to count
	 * @return int count of starters
	 */
	public function getStarterCount(int $startingType)
	{
		$query = 'SELECT COUNT(`wkParticipo_Starter`.`id`) AS starterCount FROM `wkParticipo_Starter` '
		. ' WHERE `wkParticipo_Starter`.`eventId` = :eventId AND `wkParticipo_Starter`.`type` = :typeId;';
		$params = [
			':eventId' => ['value' => $this->id, 'data_type' => PDO::PARAM_INT],
			':typeId' => ['value' => $startingType, 'data_type' => PDO::PARAM_INT],
		];
		$response = dbConnector::query($query, $params);
		return intval($response[0]['starterCount']);
	}

	public function getSeatCount()
	{
		return self::getSeatCountOf($this->id);
	}

	public function getHtmlStarterStatistic()
	{
		$isEmpty = true;
		$retHtml = '<dl>';
		foreach ([StartingType::Fighter, StartingType::NoParticipation, StartingType::Audience] as $type) {
			$count = $this->getStarterCount($type);
			if ($count > 0) {
				$isEmpty = false;
				$retHtml .= '<dt>' . StartingType::$AsString[$type] . '</dt><dd>' . $count . '</dd>';
			}
		}
		if ($this->getSeatCount() > 0) {
			$isEmpty = false;
			$retHtml .= '<dt>Mitfahrgelegenheiten</dt><dd>' . $this->getSeatCount() . '</dd>';
		}
		$retHtml .= '</dl>';
		return $isEmpty ? '' : $retHtml;
	}

	public static function fromDbArray($member)
	{
		$shiai = json_decode($member['bemerkungen'], true);

		return new event(
			$member['id'] ?? null,
			$member['date'] ?? null,
			$member['wkId'] ?? null,
			$member['meldefrist'] ?? null,
			$member['bemerkungen'] ?? null,
			shiai::fromDbArray(($shiai != null) ? $shiai : $member)
		);
	}

	/// Einen Starter per userId mit typeId zu einem Event per eventId hinzufügen
	/// Es erfolgt keine Überprüfung der Meldeberechtigung!
	public static function addStarter($dbConnection, $starter)
	{
		$query = 'INSERT INTO `wkParticipo_Starter` (eventId, userId, type) values (:eventId, :userId, :typeId);';
		$params = [
			':eventId' => ['value' => $starter->getEventId(), 'data_type' => PDO::PARAM_INT],
			':userId' => ['value' => $starter->getUserId(), 'data_type' => PDO::PARAM_INT],
			':typeId' => ['value' => $starter->getTypeId(), 'data_type' => PDO::PARAM_INT]
		];

		return dbConnector::query($query, $params);
	}

	public static function getSeatCountOf(int $id)
	{
		$query = 'SELECT SUM(plaetze) AS sumSeats FROM `cwsvjudo`.`wkParticipo_Fahrten` WHERE eventId = :eventId;';
		$params = [
			'eventId' => ['value' => $id, 'data_type' => PDO::PARAM_INT]
		];
		$response = dbConnector::query($query, $params);
		$sumSeats = filterCount($response[0]['sumSeats']);
		return $sumSeats;
	}

	public function getHtmlAddStarterForm($user, $options = [])
	{
		$defaults = [
			'formClass' => 's12 m6 xl3',
			'inputClass' => 'col s12',
			'buttonClass' => 'btn'
		];

		$options = array_merge($defaults, $options);

		$returnToUrl = $options['returnToUrl'] ?? urlencode(getCurPagesUrl());

		$key = isset($_SESSION['apiKey']) ? $_SESSION['apiKey'] : null;
		$selectId = 'form-selectType-event-' . $this->id . '-user-' . $user->getId();

		$form =
			'<form class="' . $options['formClass'] . '" action="api.starter.add.php" method="post">'
				. '<input type="hidden" name="eventId" id="eventId" value="' . $this->id . '">'
				. '<input type="hidden" name="userId"  id="userId"  value="' . $user->getId() . '">'
				. '<input type="hidden" name="returnToUrl" id="returnToUrl" value="' . $returnToUrl . '" >'
				. '<div class="' . $options['inputClass'] . '">'
					. '<fieldset id="' . $selectId . '>'
						. '<label for="' . $selectId . '">' . $user->getName() . ', ' . $user->getFirstname() . '</label>'
						. '<p>'
							. '<label for="' . $selectId . '-asStarter">'
								. '<input name="type" type="radio" id="' . $selectId . '-asStarter" value="1" />'
								. '<span>als Starter</span>'
							. '</label>'
						. '</p>'
						. '<p>'
							. '<label for="' . $selectId . '-asWatcher">'
								. '<input name="type" type="radio" id="' . $selectId . '-asWatcher" value="2" />'
								. '<span>als Zuschauer</span>'
							. '</label>'
						. '</p>'
						. '<p>'
							. '<label for="' . $selectId . '-asNone">'
								. '<input name="type" type="radio" id="' . $selectId . '-asNone" value="3" checked />'
								. '<span>keine Teilnahme</span>'
							. '</label>'
						. '</p>'
						. '<input class="' . $options['buttonClass'] . '" type="submit" name="submit" value="eintragen" />'
					. '</fieldset>'
				. '</div>'
			. '</form>';

		return $form;
	}
} // end class event