<?php

declare(strict_types=1);

namespace App\State;

use ApiPlatform\Metadata\Operation;
use ApiPlatform\State\ProviderInterface;
use App\ApiResource\DatabaseInfo;
use App\Repository\EnvironmentRepository;
use App\Service\DatabaseService;
use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;

final readonly class DatabaseInfoProvider implements ProviderInterface
{
    public function __construct(
        private EnvironmentRepository $environmentRepository,
        private DatabaseService $databaseService,
    ) {}

    public function provide(Operation $operation, array $uriVariables = [], array $context = []): DatabaseInfo
    {
        $id = $uriVariables['id'] ?? null;
        $environment = $id ? $this->environmentRepository->find($id) : null;

        if (null === $environment) {
            throw new NotFoundHttpException(sprintf('Environment "%s" not found.', $id));
        }

        $databaseName = $environment->getDatabaseName();

        if (null === $databaseName || '' === $databaseName) {
            throw new NotFoundHttpException('No database configured for this environment.');
        }

        $info = $this->databaseService->getDatabaseInfo($databaseName);

        $dto = new DatabaseInfo();
        $dto->connected = $info['connected'];
        $dto->name = $info['name'];
        $dto->size = $info['size'];
        $dto->tableCount = $info['tableCount'];
        $dto->activeConnections = $info['activeConnections'];
        $dto->cacheHitRatio = $info['cacheHitRatio'];
        $dto->largestTable = $info['largestTable'];

        return $dto;
    }
}