<?php

declare(strict_types=1);

namespace App\State\Bovin;

use ApiPlatform\Metadata\Operation;
use ApiPlatform\State\ProviderInterface;
use App\ApiResource\BovinInventory;
use App\Service\AnimalSummaryMapper;
use DateTimeImmutable;
use Exception;
use Malio\EdnotifBundle\Bovin\Api\BovinApiInterface;
use Symfony\Component\HttpFoundation\RequestStack;

use function count;
use function is_string;

/**
 * @implements ProviderInterface<null|BovinInventory>
 */
final class BovinInventoryProvider implements ProviderInterface
{
    public function __construct(
        private BovinApiInterface $bovinApi,
        private RequestStack $requestStack,
        private AnimalSummaryMapper $animalSummaryMapper,
    ) {}

    public function provide(Operation $operation, array $uriVariables = [], array $context = []): ?BovinInventory
    {
        $startDateRaw = (string) ($uriVariables['startDate'] ?? '');
        if ('' === $startDateRaw) {
            return null;
        }

        try {
            $startDate = new DateTimeImmutable($startDateRaw);
        } catch (Exception) {
            return null;
        }

        $request = $this->requestStack->getCurrentRequest();

        $endDate    = null;
        $endDateRaw = $request?->query->get('endDate');
        if (is_string($endDateRaw) && '' !== $endDateRaw) {
            try {
                $endDate = new DateTimeImmutable($endDateRaw);
            } catch (Exception) {
                return null;
            }
        }

        $includeEarTagStock = (bool) $request?->query->getBoolean('includeEarTagStock', false);

        $inventoryDto = $this->bovinApi->getInventory(
            startDate: $startDate,
            endDate: $endDate,
            includeEarTagStock: $includeEarTagStock,
        );

        $resource                      = new BovinInventory();
        $resource->startDate           = $inventoryDto->startDate?->format('Y-m-d') ?? $startDate->format('Y-m-d');
        $resource->endDate             = $inventoryDto->endDate?->format('Y-m-d');
        $resource->includesEarTagStock = $inventoryDto->includesEarTagStock;
        $resource->nbBovins            = $inventoryDto->nbBovins;
        $resource->earTagSeriesCount   = count($inventoryDto->earTagSeries);

        foreach ($inventoryDto->animals as $animalDto) {
            $resource->animals[] = $this->animalSummaryMapper->map($animalDto);
        }

        return $resource;
    }
}