<?php

namespace App\Event\Form;

use App\Event\AbstractObj as Obj;
use Qs_Form;
use Qs_Array;
use Qs_Exception_EmptyPropertyException;
use Qs_Request;
use Zend_Registry;
use Exception;

use Qs\Form\DynamicFormTrait;

abstract class AbstractSignupForm extends Qs_Form
{
    use DynamicFormTrait;

    const RENDER_MODE_FULL     = 'full';
    const RENDER_MODE_ATTENDEE = 'attendee';

    const ATTEND_MYSELF       = 'myself';
    const ATTEND_MYSELF_OTHER = 'myselfOther';
    const ATTEND_OTHER        = 'other';

    protected $_renderMode = self::RENDER_MODE_FULL;
    protected $_attendeeIndex = 0;
    protected $_maxAttendeeCount = 50;

    protected $_allowCurrentUser;
    protected $_allowMembers;
    protected $_currentUserId;
    protected $_allowNonMembers;
    protected $_userAutocompleteUrl;

    /**
     * @var \App\Event\AbstractObj
     */
    protected $_eventObj;

    /**
     * @var \App\Event\Attendee\Obj
     */
    protected $_attendeeObj;

    protected $_defaults = [
        'attendType' => null,
    ];

    public function init()
    {
        $renderMode = $this->getRenderMode();
        if (self::RENDER_MODE_FULL === $renderMode) {
            $this->_defaults['attendType'] = ($this->getAllowCurrentUser()) ? self::ATTEND_MYSELF : self::ATTEND_OTHER;
            $this->_initDFRelations();
            $this->addFormRule([$this, 'validateData']);
            parent::init();
        } elseif (self::RENDER_MODE_ATTENDEE === $renderMode) {
            $this->_initPaths();
            $this->_addAttendeeSubForm();
        } else {
            throw new Exception('Wrong option "renderMode"');
        }
        return $this;
    }

    protected function _initDFRelations()
    {
        $this->_dfRelations = [
            [
                'node'  => '[name="attendType"]' . ($this->getAllowCurrentUser() ? ':checked' : ''),
                'group' => '[name="attendType"]',
                'event' => 'change',
                'rules' => [
                    [
                        'value' => self::ATTEND_MYSELF,
                        'nodes' => ['#attendee-fieldset-current'],
                    ],
                    [
                        'value'            => self::ATTEND_MYSELF_OTHER,
                        'autoRebuildNodes' => true,
                        'nodes'            => [
                            '#attendee-fieldset-current', 'fieldset[data-attendee]',
                            '#addAttendee-label', '#addAttendee-element'
                        ],
                    ],
                    [
                        'value'            => self::ATTEND_OTHER,
                        'autoRebuildNodes' => true,
                        'nodes'            => [
                            'fieldset[data-attendee]',
                            '#addAttendee-label', '#addAttendee-element'
                        ],
                    ],
                ]
            ],
        ];
        return $this;
    }

    /**
     * @param string $name element name
     * @return string element label id  (e.g. foo-label)
     */
    protected function _dfGetElementLabelId($name)
    {
        return null;
    }

    /**
     * @param string $name element name
     * @return string element container id (e.g. foo-element)
     */
    protected function _dfGetElementContainerId($name)
    {
        return null;
    }

    protected function _initElements()
    {
        $this->_addAttendeesGroup();
        $this->_addAddAttendeeButton();
        return $this;
    }

    protected function _addAddAttendeeButton()
    {
        $this->addElement(
            'button',
            'addAttendee',
            [
                'label'   => '<i class="fa fa-user"></i> Add New Attendee',
                'attribs' => [
                    'data-action' => 'add',
                    'class'       => 'btn btn-secondary'
                ],
                'ignore'  => true,
                'escape'  => false,
            ]
        );

        return $this;
    }

    protected function _addAttendeeSubForm()
    {
        $defaults = (self::RENDER_MODE_FULL === $this->getRenderMode())
            ? (array) $this->_getData('attendee')
            : [$this->getAttendeeIndex() => []];
        $attendeeForm = new AttendeeForm([
            'defaults'               => $defaults,
            'renderMode'             => $this->getRenderMode(),
            'maxAttendeeCount'       => $this->getMaxAttendeeCount(),
            'currentUserId'          => $this->getCurrentUserId(),
            'allowCurrentUser'       => $this->getAllowCurrentUser(),
            'allowMembers'           => $this->getAllowMembers(),
            'allowNonMembers'        => $this->getAllowNonMembers(),
            'userAutocompleteUrl'    => $this->getUserAutocompleteUrl(),
        ]);
        $this->addSubForm($attendeeForm, 'attendee');
        return $this;
    }

    protected function _addAttendeesGroup()
    {
        if ($this->getAllowCurrentUser()) {
            $options = [
                self::ATTEND_MYSELF       => 'Myself Only',
                self::ATTEND_MYSELF_OTHER => 'Myself and Others',
                self::ATTEND_OTHER        => 'Others (I\'m not attending)',
            ];
            if (false == $this->getAllowNonMembers() && null == $this->getCurrentUserId()) {
                unset($options[self::ATTEND_MYSELF], $options[self::ATTEND_MYSELF_OTHER]);
            }
            $this->addElement(
                'radio',
                'attendType',
                [
                    'label'        => 'Who Will Attend?',
                    'separator'    => ' &nbsp; ',
                    'multiOptions' => $options,
                    'required'     => true
                ]
            );
        } else {
            $this->addElement('hidden', 'attendType', ['value' => self::ATTEND_OTHER]);
        }

        $this->_addAttendeeSubForm();
        return $this;
    }

    public function initRender()
    {
        if ($this->getInitializedRender()) {
            return $this;
        }
        $this->setAttrib('style', 'display: none');
        return parent::initRender();
    }

    protected function _addResources()
    {
        /** @var $doc \Qs_Doc */
        $doc = Zend_Registry::get('doc');

        // add scripts used by dynamically loaded form elements
        $doc->addScript('js/jquery-ui.js');
        $doc->addScript('js/lib/form-element-autocomplete.js');

        $doc->addScript('js/jquery.required.js');
        $doc->addScript('js/app/event/form.js');
        $doc->addScript('js/jquery.dynamicForm.js');

        if (self::RENDER_MODE_FULL === $this->getRenderMode()) {
            $doc->addInitObject('app.event.Form', [$this->_getScriptOptions()]);

            $dynamicFormOptions = ['relations' => $this->dfConvertRelations()];
            $doc->addInitFunction('$("#' . $this->getId() . '").dynamicForm', [$dynamicFormOptions]);
        }

        return $this;
    }

    protected function _getScriptOptions()
    {
        $options = [
            'requestUrl'       => Qs_Request::getBaseUrl(),
            'formId'           => $this->getId(),
        ];

        if (($attendeeForm = $this->getSubForm('attendee'))) {
            $options['attendeeNodeId'] = $this->getSubForm('attendee')->getId() . '-element';
            $options['maxAttendeeCount'] = $this->getMaxAttendeeCount();
        }
        return $options;
    }

    public function loadDefaultDecorators()
    {
        if (self::RENDER_MODE_ATTENDEE === $this->getRenderMode()) {
            if (false == $this->loadDefaultDecoratorsIsDisabled() && null == $this->getDecorators()) {
                $this->addDecorator('FormElements');
            }
        } else {
            parent::loadDefaultDecorators();
        }
        return $this;
    }

    protected function _fetchAttendeeNames(array $attendees)
    {
        $result = [];
        foreach ($attendees as $attendee) {
            if (!empty($attendee['firstName']) && !empty($attendee['lastName'])
                && ($name = $attendee['firstName'] . ' ' . $attendee['lastName'])
                && !in_array($name, $result)
            ) {
                $result[] = $name;
            }
        }
        return $result;
    }

    /**
     * Валідуєтсья наступне:
     * 1. дублювання аттенді в евенті
     * 2. дублювання аттенді в формі
     * @param array $data
     * @return array|bool
     * @throws \Exception
     */
    public function validateData($data)
    {
        if ($this->hasErrors()) {
            return true;
        }

        $errors = [];

        $eventObj = $this->getEventObj();
        $attendeeObj = $this->getAttendeeObj();

        $data = $this->_filterData($data);
        $attendees = (array) $data['attendee'];

        // [email => id] pairs for entered attendees
        $formNames = $this->_fetchAttendeeNames($attendees);
        $nameToId = (array) $attendeeObj->getUsersIds($formNames);
        $formIds = array_filter(array_unique(Qs_Array::fetchColAll($attendees, 'id')));
        $idToName = (array) $attendeeObj->getUsersNames($formIds);

        $registeredAttendees = (array) $this->getAttendeeObj()->getRegisteredAttendees();
        $registeredIds = array_filter(Qs_Array::fetchColAll($registeredAttendees, 'userId'));
        $registeredNames = array_unique(Qs_Array::fetchColAll($registeredAttendees, 'name'));

        $registrationLimit = (int) $eventObj->getData('registrationLimit');
        $registeredCount = count($registeredAttendees) + count($attendees);

        // registration limit validation
        if ($registrationLimit && $registrationLimit < $registeredCount) {
            $errors[] = 'Registration limit is exceeded by ' . ($registeredCount - $registrationLimit);
        }

        $signedIds = [];
        $signedNames = [];

        if ($this->getAllowCurrentUser() && ($currentId = $this->getCurrentUserId())) {
            if (isset($attendees['current']) && $attendees['current']['id'] != $currentId) {
                throw new Exception('Wrong params');
            }
        }

        if (empty($attendees)) {
            $errors[] = 'No attendees to register';
        }

        $alreadyRegisteredMsg = 'User has already been registered for this event';
        $alreadyAddedMsg = 'User has already been added to this form';
        $memberAddedAsNonMember = 'Registered member can not be signed in as a nonmember';

        // user can be signed for event only once
        foreach ($attendees as $idx => $item) {
            if (AttendeeForm::TYPE_MEMBER === $item['type']) {
                $userId = $item['id'];
                if (in_array($userId, $registeredIds)) {
                    $errors['attendee'][$idx]['id'][] = $alreadyRegisteredMsg;
                }

                $userName = isset($idToName[$userId]) ? $idToName[$userId] : null;
                if ($userName && in_array($userName, $registeredNames)) {
                    if (empty($errors['attendee'][$idx]['id'])
                        || !in_array($alreadyRegisteredMsg, $errors['attendee'][$idx]['id'])
                    ) {
                        $errors['attendee'][$idx]['id'][] = $alreadyRegisteredMsg;
                    }
                }

                if (in_array($userId, $signedIds)) {
                    $errors['attendee'][$idx]['id'][] = $alreadyAddedMsg;
                } else {
                    $signedIds[] = $userId;
                }
            } elseif ($item['firstName'] && $item['lastName']) {
                $userName = $item['firstName'] . ' ' . $item['lastName'];
                $userId = (isset($nameToId[$userName])) ? $nameToId[$userName] : null;

                if ($userId) {
                    $errors['attendee'][$idx]['lastName'][] = $memberAddedAsNonMember;
                }

                if (in_array($userName, $registeredNames)) {
                    $errors['attendee'][$idx]['lastName'][] = $alreadyRegisteredMsg;
                }

                $nameAdded = in_array($userName, $signedNames);
                $idAdded = ($userId && in_array($userId, $signedIds));
                if ($nameAdded || $idAdded) {
                    $errors['attendee'][$idx]['lastName'][] = $alreadyAddedMsg;
                }

                if (!$nameAdded) {
                    $signedNames[] = $userName;
                }

                if (!$idAdded) {
                    $signedIds[] = $userId;
                }
            }
        }

        return ($errors) ? $errors : true;
    }

    public function getValues($suppressArrayNotation = false)
    {
        $data = parent::getValues($suppressArrayNotation);
        return $this->_filterData($data);
    }

    /**
     * Unset values of unavailable elements
     * @param array $data Request or Form data
     * @return array
     */
    protected function _filterData(array $data)
    {
        $result = $data;
        $result['attendee'] = [];

        $attendees = (isset($data['attendee'])) ? (array) $data['attendee'] : [];
        $attendType = $data['attendType'];
        $allowCurrent = (bool) $this->getAllowCurrentUser();
        $allowMembers = (bool) $this->getAllowMembers();
        $allowNonMembers = (bool) $this->getAllowNonMembers();

        foreach ($attendees as $idx => $item) {
            $attendee = [
                'mode' => $item['mode'],
                'type' => $item['type'],
            ];
            if (AttendeeItemForm::MODE_CURRENT_USER === $item['mode']) {
                if (!$allowCurrent || self::ATTEND_OTHER === $attendType) {
                    continue;
                }
            } else {    // AttendeeItemForm::MODE_CHOOSE_TYPE
                if (self::ATTEND_MYSELF === $attendType) {
                    continue;
                }
            }

            if (AttendeeForm::TYPE_MEMBER === $item['type']) {
                if (!$allowMembers) {
                    continue;
                }
                $attendee['id'] = $item['id'];
            } else {    // AttendeeForm::TYPE_NONMEMBER
                if (!$allowNonMembers) {
                    continue;
                }
                $attendee['firstName'] = $item['firstName'];
                $attendee['lastName'] = $item['lastName'];
                $attendee['email'] = $item['email'];
                $attendee['company'] = $item['company'];
            }
            $result['attendee'][$idx] = $attendee;
        }

        return $result;
    }

    public function setRenderMode($renderMode)
    {
        $this->_renderMode = $renderMode;
        return $this;
    }

    public function getRenderMode()
    {
        return $this->_renderMode;
    }

    public function setAttendeeIndex($attendeeIndex)
    {
        $this->_attendeeIndex = $attendeeIndex;
        return $this;
    }

    public function getAttendeeIndex()
    {
        if (null === $this->_attendeeIndex) {
            throw new Qs_Exception_EmptyPropertyException($this, '_attendeeIndex');
        }
        return $this->_attendeeIndex;
    }

    public function setMaxAttendeeCount($maxAttendeeCount)
    {
        $this->_maxAttendeeCount = (int) $maxAttendeeCount;
        return $this;
    }

    public function getMaxAttendeeCount()
    {
        return $this->_maxAttendeeCount;
    }

    public function setAllowCurrentUser($allowCurrentUser)
    {
        $this->_allowCurrentUser = (bool) $allowCurrentUser;
        return $this;
    }

    public function getAllowCurrentUser()
    {
        return $this->_allowCurrentUser;
    }

    public function setAllowMembers($allowMembers)
    {
        $this->_allowMembers = (bool) $allowMembers;
        return $this;
    }

    public function getAllowMembers()
    {
        return $this->_allowMembers;
    }

    public function setCurrentUserId($currentUserId)
    {
        $this->_currentUserId = $currentUserId;
        return $this;
    }

    public function getCurrentUserId()
    {
        return $this->_currentUserId;
    }

    public function setAllowNonMembers($allowNonMembers)
    {
        $this->_allowNonMembers = (bool) $allowNonMembers;
        return $this;
    }

    public function getAllowNonMembers()
    {
        return $this->_allowNonMembers;
    }

    public function setUserAutocompleteUrl($userAutocompleteUrl)
    {
        $this->_userAutocompleteUrl = $userAutocompleteUrl;
        return $this;
    }

    public function getUserAutocompleteUrl()
    {
        return $this->_userAutocompleteUrl;
    }

    public function setEventObj(Obj $dataObj)
    {
        $this->_eventObj = $dataObj;
        return $this;
    }

    public function getEventObj()
    {
        if (null === $this->_eventObj) {
            throw new Qs_Exception_EmptyPropertyException($this, '_eventObj');
        }
        return $this->_eventObj;
    }

    public function setAttendeeObj($attendeeObj)
    {
        $this->_attendeeObj = $attendeeObj;
        return $this;
    }

    public function getAttendeeObj()
    {
        if (null === $this->_attendeeObj) {
            throw new Qs_Exception_EmptyPropertyException($this, '_attendeeObj');
        }
        return $this->_attendeeObj;
    }

}