<?php namespace App\Services;
/**
 * Copyright 2018 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\Events\SummitEventTypeDeleted;
use App\Events\SummitEventTypeInserted;
use App\Events\SummitEventTypeUpdated;
use App\Models\Foundation\Summit\Factories\SummitEventTypeFactory;
use App\Models\Foundation\Summit\Repositories\IDefaultSummitEventTypeRepository;
use App\Models\Foundation\Summit\Repositories\ISummitEventTypeRepository;
use App\Services\Model\AbstractService;
use App\Services\Model\ISummitEventTypeService;
use Illuminate\Support\Facades\Event;
use libs\utils\ITransactionService;
use models\exceptions\EntityNotFoundException;
use models\exceptions\ValidationException;
use models\summit\Summit;
use models\summit\SummitEventType;
/**
 * Class SummitEventTypeService
 * @package App\Services
 */
final class SummitEventTypeService
    extends AbstractService
    implements ISummitEventTypeService
{
    /**
     * @var ISummitEventTypeRepository
     */
    private $repository;

    /**
     * @var IDefaultSummitEventTypeRepository
     */
    private $default_event_types_repository;

    /**
     * SummitEventTypeService constructor.
     * @param ISummitEventTypeRepository $repository
     * @param IDefaultSummitEventTypeRepository $default_event_types_repository
     * @param ITransactionService $tx_service
     */
    public function __construct
    (
        ISummitEventTypeRepository $repository,
        IDefaultSummitEventTypeRepository $default_event_types_repository,
        ITransactionService $tx_service
    )
    {
        parent::__construct($tx_service);
        $this->repository                     = $repository;
        $this->default_event_types_repository = $default_event_types_repository;
    }

    /**
     * @param Summit $summit
     * @param array $data
     * @return SummitEventType
     * @throws EntityNotFoundException
     * @throws ValidationException
     */
    public function addEventType(Summit $summit, array $data)
    {
        $event_type =  $this->tx_service->transaction(function() use($summit, $data){

            $type = trim($data['name']);

            if($summit->hasEventType($type)){
                throw new ValidationException(sprintf("event type %s already exist on summit id %s", $type, $summit->getId()));
            }

            $event_type = SummitEventTypeFactory::build($summit, $data);

            if(is_null($event_type))
                throw new ValidationException(sprintf("class_name %s is invalid", $data['class_name']));

            return $event_type;

        });

        Event::fire
        (
            new SummitEventTypeInserted
            (
                $event_type->getId(),
                $event_type->getClassName(),
                $event_type->getSummitId()
            )
        );

        return $event_type;
    }

    /**
     * @param Summit $summit
     * @param int $event_type_id
     * @param array $data
     * @return SummitEventType
     * @throws EntityNotFoundException
     * @throws ValidationException
     */
    public function updateEventType(Summit $summit, $event_type_id, array $data)
    {
        return $this->tx_service->transaction(function() use($summit, $event_type_id, $data){

            $type = isset($data['name']) ? trim($data['name']) : null;

            $event_type = $summit->getEventType($event_type_id);

            if(is_null($event_type))
                throw new EntityNotFoundException(sprintf("event type id %s does not belongs to summit id %s", $event_type_id, $summit->getId()));

            if(!empty($type)) {
                $old_event_type = $summit->getEventTypeByType($type);
                if(!is_null($old_event_type) && $old_event_type->getId() != $event_type->getId()){
                    throw new ValidationException(sprintf("name %s already belongs to another event type id %s", $type, $old_event_type->getId()));
                }
            }

            $event_type = SummitEventTypeFactory::populate($event_type, $summit, $data);

            Event::fire
            (
                new SummitEventTypeUpdated
                (
                    $event_type->getId(),
                    $event_type->getClassName(),
                    $event_type->getSummitId()
                )
            );

            return $event_type;

        });
    }

    /**
     * @param Summit $summit
     * @param int $event_type_id
     * @return void
     * @throws EntityNotFoundException
     * @throws ValidationException
     */
    public function deleteEventType(Summit $summit, $event_type_id)
    {
        return $this->tx_service->transaction(function() use($event_type_id, $summit){

            $event_type = $summit->getEventType($event_type_id);

            if(is_null($event_type))
                throw new EntityNotFoundException
                (
                  sprintf("event type id %s does not belongs to summit id %s", $event_type_id, $summit->getId())
                );

            if ($event_type->isDefault())
                throw new ValidationException
                (
                    sprintf("event type id %s is a default one and is not allowed to be deleted", $event_type_id)
                );

            $summit_events = $event_type->getRelatedPublishedSummitEventsIds();

            if(count($summit_events) > 0){
                throw new ValidationException
                (
                    sprintf("event type id %s could not be deleted bc its assigned to published events on summit id %s", $event_type_id, $summit->getId())
                );
            }

            Event::fire
            (
                new SummitEventTypeDeleted
                (
                    $event_type->getId(),
                    $event_type->getClassName(),
                    $event_type->getSummitId()
                )
            );

            $summit->removeEventType($event_type);

        });
    }

    /**
     * @param Summit $summit
     * @return SummitEventType[]
     * @throws EntityNotFoundException
     * @throws ValidationException
     */
    public function seedDefaultEventTypes(Summit $summit)
    {
        $added_types =  $this->tx_service->transaction(function() use($summit){
            $added_types = [];
            $default_types = $this->default_event_types_repository->getAll();
            foreach ($default_types as $default_type){
                $former_type = $summit->getEventTypeByType($default_type->getType());
                if(!is_null($former_type)) continue;
                $new_type = $default_type->buildType($summit);
                $summit->addEventType($new_type);
                $added_types[] = $new_type;
            }

            return $added_types;
        });

        foreach ($added_types as $event_type){
            Event::fire
            (
                new SummitEventTypeInserted
                (
                    $event_type->getId(),
                    $event_type->getClassName(),
                    $event_type->getSummitId()
                )
            );
        }

        return $added_types;
    }
}