<?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\Contracts\HttpClient;

use Symfony\Contracts\HttpClient\Exception\ClientExceptionInterface;
use Symfony\Contracts\HttpClient\Exception\DecodingExceptionInterface;
use Symfony\Contracts\HttpClient\Exception\ExceptionInterface;
use Symfony\Contracts\HttpClient\Exception\RedirectionExceptionInterface;
use Symfony\Contracts\HttpClient\Exception\ServerExceptionInterface;
use Symfony\Contracts\HttpClient\Exception\TransportExceptionInterface;

/**
 * A (lazily retrieved) HTTP response.
 *
 * @author Nicolas Grekas <p@tchwork.com>
 */
interface ResponseInterface
{
    /**
     * Gets the HTTP status code of the response.
     *
     * @throws TransportExceptionInterface when a network error occurs
     */
    public function getStatusCode(): int;

    /**
     * Gets the HTTP headers of the response.
     *
     * @param bool $throw Whether an exception should be thrown on 3/4/5xx status codes
     *
     * @return string[][] The headers of the response keyed by header names in lowercase
     *
     * @throws TransportExceptionInterface   When a network error occurs
     * @throws RedirectionExceptionInterface On a 3xx when $throw is true and the "max_redirects" option has been reached
     * @throws ClientExceptionInterface      On a 4xx when $throw is true
     * @throws ServerExceptionInterface      On a 5xx when $throw is true
     */
    public function getHeaders(bool $throw = true): array;

    /**
     * Gets the response body as a string.
     *
     * @param bool $throw Whether an exception should be thrown on 3/4/5xx status codes
     *
     * @throws TransportExceptionInterface   When a network error occurs
     * @throws RedirectionExceptionInterface On a 3xx when $throw is true and the "max_redirects" option has been reached
     * @throws ClientExceptionInterface      On a 4xx when $throw is true
     * @throws ServerExceptionInterface      On a 5xx when $throw is true
     */
    public function getContent(bool $throw = true): string;

    /**
     * Gets the response body decoded as array, typically from a JSON payload.
     *
     * @param bool $throw Whether an exception should be thrown on 3/4/5xx status codes
     *
     * @throws DecodingExceptionInterface    When the body cannot be decoded to an array
     * @throws TransportExceptionInterface   When a network error occurs
     * @throws RedirectionExceptionInterface On a 3xx when $throw is true and the "max_redirects" option has been reached
     * @throws ClientExceptionInterface      On a 4xx when $throw is true
     * @throws ServerExceptionInterface      On a 5xx when $throw is true
     */
    public function toArray(bool $throw = true): array;

    /**
     * Closes the response stream and all related buffers.
     *
     * No further chunk will be yielded after this method has been called.
     */
    public function cancel(): void;

    /**
     * Returns info coming from the transport layer.
     *
     * This method SHOULD NOT throw any ExceptionInterface and SHOULD be non-blocking.
     * The returned info is "live": it can be empty and can change from one call to
     * another, as the request/response progresses.
     *
     * The following info MUST be returned:
     *  - canceled (bool) - true if the response was canceled using ResponseInterface::cancel(), false otherwise
     *  - error (string|null) - the error message when the transfer was aborted, null otherwise
     *  - http_code (int) - the last response code or 0 when it is not known yet
     *  - http_method (string) - the HTTP verb of the last request
     *  - redirect_count (int) - the number of redirects followed while executing the request
     *  - redirect_url (string|null) - the resolved location of redirect responses, null otherwise
     *  - response_headers (array) - an array modelled after the special $http_response_header variable
     *  - start_time (float) - the time when the request was sent or 0.0 when it's pending
     *  - url (string) - the last effective URL of the request
     *  - user_data (mixed) - the value of the "user_data" request option, null if not set
     *
     * When the "capture_peer_cert_chain" option is true, the "peer_certificate_chain"
     * attribute SHOULD list the peer certificates as an array of OpenSSL X.509 resources.
     *
     * Other info SHOULD be named after curl_getinfo()'s associative return value.
     *
     * @return mixed An array of all available info, or one of them when $type is
     *               provided, or null when an unsupported type is requested
     */
    public function getInfo(string $type = null);
}