<?php

namespace App\Service;

use App\Dto\BarChart\BarChartInput;
use App\Dto\BarChart\BarChartOutput;
use Doctrine\ORM\EntityManagerInterface;

class BarChartService
{
    private EntityManagerInterface $entityManager;

    public function __construct(EntityManagerInterface $entityManager)
    {
        $this->entityManager = $entityManager;
    }

    public function getBarChartData(BarChartInput $input): array
    {
        $startDate = new \DateTimeImmutable($input->start);
        $endDate = new \DateTimeImmutable($input->end);
        echo "=================================================================";
        $queryBuilder = $this->entityManager->createQueryBuilder();

        // Sélectionnez la date avec le format approprié en fonction de la granularité
        switch ($input->granularity) {
            case 'day':
                $selectExpression = 'DATE_FORMAT(s.date, \'%Y-%m-%d\')';
                $groupByExpression = 's.date';
                break;
            case 'month':
                $selectExpression = 'DATE_FORMAT(s.date, \'%Y-%m\')';
                $groupByExpression = 'DATE_FORMAT(s.date, \'%Y-%m\')';
                break;
            case 'year':
                $selectExpression = 'DATE_FORMAT(s.date, \'%Y\')';
                $groupByExpression = 'DATE_FORMAT(s.date, \'%Y\')';
                break;
            default:
                throw new \InvalidArgumentException('Invalid granularity');
        }

        $result = $queryBuilder
            ->select($selectExpression . ' as date', 'COUNT(s.id) as occurrences')
            ->from(Sale::class, 's')
            ->where('s.date BETWEEN :start AND :end')
            ->setParameter('start', $startDate)
            ->setParameter('end', $endDate)
            ->groupBy($groupByExpression)
            ->orderBy('date')
            ->getQuery()
            ->getResult();

        $output = [];
        foreach ($result as $row) {
            $output[] = new BarChartOutput($row['date'], (int)$row['occurrences']);
        }

        return $output;
    }
}