<?php namespace ModelSerializers;
/**
 * Copyright 2016 OpenStack Foundation
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * http://www.apache.org/licenses/LICENSE-2.0
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 **/

use App\Facades\ResourceServerContext;
use Libs\ModelSerializers\AbstractSerializer;
use models\main\Member;
use models\summit\SummitEvent;

/**
 * Class SummitEventSerializer
 * @package ModelSerializers
 */
class SummitEventSerializer extends SilverStripeSerializer
{

    protected static $array_mappings = [
        'Title' => 'title:json_string',
        'Abstract' => 'description:json_string',
        'SocialSummary' => 'social_description:json_string',
        'StartDate' => 'start_date:datetime_epoch',
        'EndDate' => 'end_date:datetime_epoch',
        'LocationId' => 'location_id:json_int',
        'SummitId' => 'summit_id:json_int',
        'TypeId' => 'type_id:json_int',
        'ClassName' => 'class_name',
        'AllowFeedBack' => 'allow_feedback:json_boolean',
        'AvgFeedbackRate' => 'avg_feedback_rate:json_float',
        'Published' => 'is_published:json_boolean',
        'HeadCount' => 'head_count:json_int',
        'RSVPLink' => 'rsvp_link:json_string',
        'RSVPTemplateId' => 'rsvp_template_id:json_int',
        'RSVPMaxUserNumber' => 'rsvp_max_user_number:json_int',
        'RSVPMaxUserWaitListNumber' => 'rsvp_max_user_wait_list_number:json_int',
        'RSVPRegularCount' => 'rsvp_regular_count:json_int',
        'RSVPWaitCount' => 'rsvp_wait_count:json_int',
        'ExternalRSVP' => 'rsvp_external:json_boolean',
        'CategoryId' => 'track_id:json_int',
        'MeetingUrl' => 'meeting_url:json_string',
        'TotalAttendanceCount' => 'attendance_count:json_int',
        'CurrentAttendanceCount' => 'current_attendance_count:json_int',
        'ImageUrl' => 'image:json_url',
        "StreamThumbnailUrl" => "stream_thumbnail:json_url",
        'Level' => 'level',
        'CreatedById' => 'created_by_id:json_int',
        'UpdatedById' => 'updated_by_id:json_int',
    ];

    protected static $allowed_fields = [
        'id',
        'title',
        'description',
        'social_description',
        'start_date',
        'end_date',
        'location_id',
        'summit_id',
        'type_id',
        'class_name',
        'allow_feedback',
        'avg_feedback_rate',
        'is_published',
        'head_count',
        'rsvp_link',
        'rsvp_external',
        'track_id',
        'rsvp_template_id',
        'rsvp_max_user_number',
        'rsvp_max_user_wait_list_number',
        'rsvp_regular_count',
        'rsvp_wait_count',
        'streaming_url',
        'etherpad_link',
        'meeting_url',
        'attendance_count',
        'current_attendance_count',
        'image',
        'stream_thumbnail',
        'level',
        'created_by_id',
        'updated_by_id',
    ];

    protected static $allowed_relations = [
        'sponsors',
        'tags',
        'feedback',
        'current_attendance',
    ];

    /**
     * @param null $expand
     * @param array $fields
     * @param array $relations
     * @param array $params
     * @return array
     */
    public function serialize(
        $expand = null, array $fields = array(), array $relations = array(), array $params = array())
    {
        $event = $this->object;
        if (!$event instanceof SummitEvent) return [];

        if (!count($relations)) $relations = $this->getAllowedRelations();

        $values = parent::serialize($expand, $fields, $relations, $params);

        if (in_array('sponsors', $relations))
            $values['sponsors'] = $event->getSponsorsIds();

        if (in_array('tags', $relations)) {
            $tags = [];
            foreach ($event->getTags() as $tag) {
                $tags[] = $tag->getId();
            }
            $values['tags'] = $tags;
        }

        if (in_array('feedback', $relations)) {
            $feedback = [];
            $count = 0;
            foreach ($event->getFeedback() as $f) {
                $feedback[] = $f->getId();
                $count++;
                if (AbstractSerializer::MaxCollectionPage < $count) break;
            }
            $values['feedback'] = $feedback;
        }

        if (in_array('current_attendance', $relations)) {
            $attendance = [];
            $count = 0;
            foreach ($event->getCurrentAttendance() as $a) {
                $attendance[] = $a->getId();
                $count++;
                if (AbstractSerializer::MaxCollectionPage < $count) break;
            }
            $values['current_attendance'] = $attendance;
        }

        if (isset($params['current_user']) && $params['current_user'] instanceof Member  && $event->hasAccess($params['current_user'])) {
            $values['streaming_url'] = $event->getStreamingUrl();
            $values['etherpad_link'] = $event->getEtherpadLink();
        }

        if (!empty($expand)) {
            foreach (explode(',', $expand) as $relation) {
                $relation = trim($relation);
                switch ($relation) {
                    case 'current_attendance':
                    {
                        $attendance = [];
                        $count = 0;
                        foreach ($event->getCurrentAttendance() as $a) {
                            $attendance[] = SerializerRegistry::getInstance()->getSerializer($a)->serialize(AbstractSerializer::filterExpandByPrefix($expand, $relation));
                            $count++;
                            if (AbstractSerializer::MaxCollectionPage < $count) break;
                        }
                        $values['current_attendance'] = $attendance;
                    }
                    case 'feedback':
                        {
                            $feedback = [];
                            foreach ($event->getFeedback() as $f) {
                                $feedback[] = SerializerRegistry::getInstance()->getSerializer($f)->serialize(AbstractSerializer::filterExpandByPrefix($expand, $relation));
                            }
                            $values['feedback'] = $feedback;
                        }
                        break;
                    case 'location':
                        {
                            if ($event->hasLocation()) {
                                unset($values['location_id']);
                                $values['location'] = SerializerRegistry::getInstance()->getSerializer($event->getLocation())->serialize(AbstractSerializer::filterExpandByPrefix($expand, $relation));
                            }
                        }
                        break;
                    case 'rsvp_template':
                        {
                            if ($event->hasRSVPTemplate()) {
                                unset($values['rsvp_template_id']);
                                $values['rsvp_template'] = SerializerRegistry::getInstance()->getSerializer($event->getRSVPTemplate())->serialize(AbstractSerializer::filterExpandByPrefix($expand, $relation));
                            }
                        }
                        break;
                    case 'sponsors':
                        {
                            $sponsors = [];
                            foreach ($event->getSponsors() as $s) {
                                $sponsors[] = SerializerRegistry::getInstance()->getSerializer($s)->serialize(AbstractSerializer::filterExpandByPrefix($expand, $relation));
                            }
                            $values['sponsors'] = $sponsors;
                        }
                        break;
                    case 'track':
                    {
                        unset($values['track_id']);
                        $values['track'] = SerializerRegistry::getInstance()->getSerializer($event->getCategory())->serialize(AbstractSerializer::filterExpandByPrefix($expand, $relation));
                    }
                    case 'type':
                        {
                            unset($values['type_id']);
                            $values['type'] = SerializerRegistry::getInstance()->getSerializer($event->getType())->serialize(AbstractSerializer::filterExpandByPrefix($expand, $relation));
                        }
                        break;
                    case 'tags':
                        {
                            $tags = [];
                            foreach ($event->getTags() as $tag) {
                                $tags[] = SerializerRegistry::getInstance()->getSerializer($tag)->serialize(AbstractSerializer::filterExpandByPrefix($expand, $relation));
                            }
                            $values['tags'] = $tags;
                        }
                        break;
                    case 'created_by':
                        {
                            if(!$event->hasCreatedBy())
                                break;
                            unset($values['created_by_id']);
                            $values['created_by'] = SerializerRegistry::getInstance()->getSerializer($event->getCreatedBy())->serialize(AbstractSerializer::filterExpandByPrefix($expand, $relation));
                        }
                        break;
                    case 'updated_by':
                        {
                            if(!$event->hasUpdatedBy())
                                break;
                            unset($values['updated_by_id']);
                            $values['updated_by'] = SerializerRegistry::getInstance()->getSerializer($event->getUpdatedBy())->serialize(AbstractSerializer::filterExpandByPrefix($expand, $relation));
                        }
                        break;
                }
            }
        }

        return $values;
    }
}