<?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Symfony\Component\HttpClient;

use Http\Discovery\Psr17Factory;
use Http\Discovery\Psr17FactoryDiscovery;
use Nyholm\Psr7\Factory\Psr17Factory as NyholmPsr17Factory;
use Nyholm\Psr7\Request;
use Nyholm\Psr7\Uri;
use Psr\Http\Client\ClientInterface;
use Psr\Http\Client\NetworkExceptionInterface;
use Psr\Http\Client\RequestExceptionInterface;
use Psr\Http\Message\RequestFactoryInterface;
use Psr\Http\Message\RequestInterface;
use Psr\Http\Message\ResponseFactoryInterface;
use Psr\Http\Message\ResponseInterface;
use Psr\Http\Message\StreamFactoryInterface;
use Psr\Http\Message\StreamInterface;
use Psr\Http\Message\UriFactoryInterface;
use Psr\Http\Message\UriInterface;
use Symfony\Component\HttpClient\Internal\HttplugWaitLoop;
use Symfony\Contracts\HttpClient\Exception\TransportExceptionInterface;
use Symfony\Contracts\HttpClient\HttpClientInterface;
use Symfony\Contracts\Service\ResetInterface;

if (!interface_exists(ClientInterface::class)) {
    throw new \LogicException('You cannot use the "Symfony\Component\HttpClient\Psr18Client" as the "psr/http-client" package is not installed. Try running "composer require php-http/discovery psr/http-client-implementation:*".');
}

if (!interface_exists(RequestFactoryInterface::class)) {
    throw new \LogicException('You cannot use the "Symfony\Component\HttpClient\Psr18Client" as the "psr/http-factory" package is not installed. Try running "composer require php-http/discovery psr/http-factory-implementation:*".');
}

/**
 * An adapter to turn a Symfony HttpClientInterface into a PSR-18 ClientInterface.
 *
 * Run "composer require php-http/discovery psr/http-client-implementation:*"
 * to get the required dependencies.
 *
 * @author Nicolas Grekas <p@tchwork.com>
 */
final class Psr18Client implements ClientInterface, RequestFactoryInterface, StreamFactoryInterface, UriFactoryInterface, ResetInterface
{
    private HttpClientInterface $client;
    private ResponseFactoryInterface $responseFactory;
    private StreamFactoryInterface $streamFactory;
    private bool $autoUpgradeHttpVersion = true;

    public function __construct(?HttpClientInterface $client = null, ?ResponseFactoryInterface $responseFactory = null, ?StreamFactoryInterface $streamFactory = null)
    {
        $this->client = $client ?? HttpClient::create();
        $streamFactory ??= $responseFactory instanceof StreamFactoryInterface ? $responseFactory : null;

        if (null === $responseFactory || null === $streamFactory) {
            if (class_exists(Psr17Factory::class)) {
                $psr17Factory = new Psr17Factory();
            } elseif (class_exists(NyholmPsr17Factory::class)) {
                $psr17Factory = new NyholmPsr17Factory();
            } else {
                throw new \LogicException('You cannot use the "Symfony\Component\HttpClient\Psr18Client" as no PSR-17 factories have been provided. Try running "composer require php-http/discovery psr/http-factory-implementation:*".');
            }

            $responseFactory ??= $psr17Factory;
            $streamFactory ??= $psr17Factory;
        }

        $this->responseFactory = $responseFactory;
        $this->streamFactory = $streamFactory;
    }

    public function withOptions(array $options): static
    {
        $clone = clone $this;
        if (\array_key_exists('auto_upgrade_http_version', $options)) {
            $clone->autoUpgradeHttpVersion = $options['auto_upgrade_http_version'];
            unset($options['auto_upgrade_http_version']);
        }
        $clone->client = $clone->client->withOptions($options);

        return $clone;
    }

    public function sendRequest(RequestInterface $request): ResponseInterface
    {
        try {
            $body = $request->getBody();
            $headers = $request->getHeaders();

            $size = $request->getHeader('content-length')[0] ?? -1;
            if (0 > $size && 0 < $size = $body->getSize() ?? -1) {
                $headers['Content-Length'] = [$size];
            }

            if (0 === $size) {
                $body = '';
            } elseif (0 < $size && $size < 1 << 21) {
                if ($body->isSeekable()) {
                    try {
                        $body->seek(0);
                    } catch (\RuntimeException) {
                        // ignore
                    }
                }

                $body = $body->getContents();
            } else {
                $body = static function (int $size) use ($body) {
                    if ($body->isSeekable()) {
                        try {
                            $body->seek(0);
                        } catch (\RuntimeException) {
                            // ignore
                        }
                    }

                    while (!$body->eof()) {
                        yield $body->read($size);
                    }
                };
            }

            $options = [
                'headers' => $headers,
                'body' => $body,
            ];

            if (!$this->autoUpgradeHttpVersion || '1.0' === $request->getProtocolVersion()) {
                $options['http_version'] = $request->getProtocolVersion();
            }

            $response = $this->client->request($request->getMethod(), (string) $request->getUri(), $options);

            return HttplugWaitLoop::createPsr7Response($this->responseFactory, $this->streamFactory, $this->client, $response, false);
        } catch (TransportExceptionInterface $e) {
            if ($e instanceof \InvalidArgumentException) {
                throw new Psr18RequestException($e, $request);
            }

            throw new Psr18NetworkException($e, $request);
        }
    }

    public function createRequest(string $method, $uri): RequestInterface
    {
        if ($this->responseFactory instanceof RequestFactoryInterface) {
            return $this->responseFactory->createRequest($method, $uri);
        }

        if (class_exists(Psr17FactoryDiscovery::class)) {
            return Psr17FactoryDiscovery::findRequestFactory()->createRequest($method, $uri);
        }

        if (class_exists(Request::class)) {
            return new Request($method, $uri);
        }

        throw new \LogicException(\sprintf('You cannot use "%s()" as no PSR-17 factories have been found. Try running "composer require php-http/discovery psr/http-factory-implementation:*".', __METHOD__));
    }

    public function createStream(string $content = ''): StreamInterface
    {
        $stream = $this->streamFactory->createStream($content);

        if ($stream->isSeekable()) {
            try {
                $stream->seek(0);
            } catch (\RuntimeException) {
                // ignore
            }
        }

        return $stream;
    }

    public function createStreamFromFile(string $filename, string $mode = 'r'): StreamInterface
    {
        return $this->streamFactory->createStreamFromFile($filename, $mode);
    }

    public function createStreamFromResource($resource): StreamInterface
    {
        return $this->streamFactory->createStreamFromResource($resource);
    }

    public function createUri(string $uri = ''): UriInterface
    {
        if ($this->responseFactory instanceof UriFactoryInterface) {
            return $this->responseFactory->createUri($uri);
        }

        if (class_exists(Psr17FactoryDiscovery::class)) {
            return Psr17FactoryDiscovery::findUrlFactory()->createUri($uri);
        }

        if (class_exists(Uri::class)) {
            return new Uri($uri);
        }

        throw new \LogicException(\sprintf('You cannot use "%s()" as no PSR-17 factories have been found. Try running "composer require php-http/discovery psr/http-factory-implementation:*".', __METHOD__));
    }

    public function reset(): void
    {
        if ($this->client instanceof ResetInterface) {
            $this->client->reset();
        }
    }
}

/**
 * @internal
 */
class Psr18NetworkException extends \RuntimeException implements NetworkExceptionInterface
{
    public function __construct(
        TransportExceptionInterface $e,
        private RequestInterface $request,
    ) {
        parent::__construct($e->getMessage(), 0, $e);
    }

    public function getRequest(): RequestInterface
    {
        return $this->request;
    }
}

/**
 * @internal
 */
class Psr18RequestException extends \InvalidArgumentException implements RequestExceptionInterface
{
    public function __construct(
        TransportExceptionInterface $e,
        private RequestInterface $request,
    ) {
        parent::__construct($e->getMessage(), 0, $e);
    }

    public function getRequest(): RequestInterface
    {
        return $this->request;
    }
}
