<?php

declare(strict_types=1);

namespace GitContributionGraph\Service\Provider;

use Symfony\Component\DependencyInjection\Attribute\AutowireIterator;

final class ProviderHealthChecker
{
    /** @param iterable<ProviderInterface> $providers */
    public function __construct(
        #[AutowireIterator('app.provider')]
        private readonly iterable $providers,
    ) {}

    /**
     * Probes every configured provider and aggregates the results for the /health endpoint.
     *
     * @return array{status: string, providers: array<string, array<string, string>>} 'status' is
     *   "degraded" if any provider's probe() reported an error, otherwise "ok"
     */
    public function check(): array
    {
        $statuses = [];
        $hasError = false;

        /** @var ProviderInterface $provider */
        foreach ($this->providers as $provider) {
            $status                  = $provider->probe();
            $statuses[$status->name] = $status->toArray();

            if ($status->status === ProviderStatusType::Error) {
                $hasError = true;
            }
        }

        return [
            'status'    => $hasError ? 'degraded' : 'ok',
            'providers' => $statuses,
        ];
    }
}