<?php

namespace Chill\PersonBundle\Export\Aggregator;

use Chill\MainBundle\Export\AggregatorInterface;
use Chill\MainBundle\Repository\ScopeRepository;
use Chill\MainBundle\Templating\TranslatableStringHelper;
use Chill\PersonBundle\Export\Declarations;
use Doctrine\ORM\Query\Expr\From;
use Doctrine\ORM\QueryBuilder;
use Symfony\Component\Form\FormBuilderInterface;

final class ScopeAggregator implements AggregatorInterface
{

    private ScopeRepository $scopeRepository;

    private TranslatableStringHelper $translatableStringHelper;

    public function __construct(
        ScopeRepository $scopeRepository,
        TranslatableStringHelper $translatableStringHelper
    ) {
        $this->scopeRepository = $scopeRepository;
        $this->translatableStringHelper = $translatableStringHelper;
    }

    /**
     * @inheritDoc
     */
    public function getLabels($key, array $values, $data)
    {
        return function ($value): string {
            if ($value === '_header') {
                return 'Scope';
            }

            $s = $this->scopeRepository->find($value);

            return $this->translatableStringHelper->localize(
                $s->getName()
            );
        };
    }

    /**
     * @inheritDoc
     */
    public function getQueryKeys($data): array
    {
        return ['scope_aggregator'];
    }

    /**
     * @inheritDoc
     */
    public function buildForm(FormBuilderInterface $builder)
    {
        // no form
    }

    /**
     * @inheritDoc
     */
    public function getTitle(): string
    {
        return 'Group by user scope';
    }

    /**
     * @inheritDoc
     */
    public function addRole()
    {
        return null;
    }

    /**
     * @inheritDoc
     */
    public function alterQuery(QueryBuilder $qb, $data)
    {
        switch ($this->getBaseEntityAppliedOn($qb)) {

            case 'acp':
                $qb->join('acp.scopes', 's');
                $qb->addSelect('s.id as scope_aggregator');
                break;

            case 'acpw':
                $qb->join('acpw.referrers', 'r');
                $qb->addSelect('IDENTITY(r.mainScope) as scope_aggregator');
                break;

            default:
                throw new \Exception("Does not apply on that base entity");
        }

        $groupBy = $qb->getDQLPart('groupBy');

        if (!empty($groupBy)) {
            $qb->addGroupBy('scope_aggregator');
        } else {
            $qb->groupBy('scope_aggregator');
        }
    }

    /**
     * @inheritDoc
     */
    public function applyOn(): string
    {
        return Declarations::ACP_SHARED;
    }

    private function getBaseEntityAppliedOn(QueryBuilder $qb): string
    {
        /** @var From $from */
        $from = $qb->getDQLPart('from');

        return $from[0]->getAlias();
    }
}