<?php

/**
 * Part of the Joomla Framework Http Package
 *
 * @copyright  Copyright (C) 2005 - 2021 Open Source Matters, Inc. All rights reserved.
 * @license    GNU General Public License version 2 or later; see LICENSE
 */

namespace Joomla\Http;

use Joomla\Uri\Uri;
use Joomla\Uri\UriInterface;
use Psr\Http\Client\ClientInterface;
use Psr\Http\Message\RequestInterface;
use Psr\Http\Message\ResponseInterface;

/**
 * HTTP client class.
 *
 * @since  1.0
 */
class Http implements ClientInterface
{
    /**
     * Options for the HTTP client.
     *
     * @var    array|\ArrayAccess
     * @since  1.0
     */
    protected $options;

    /**
     * The HTTP transport object to use in sending HTTP requests.
     *
     * @var    TransportInterface
     * @since  1.0
     */
    protected $transport;

    /**
     * Constructor.
     *
     * @param   array|\ArrayAccess   $options    Client options array. If the registry contains any headers.* elements,
     *                                           these will be added to the request headers.
     * @param   ?TransportInterface  $transport  The HTTP transport object.
     *
     * @since   1.0
     * @throws  \InvalidArgumentException
     */
    public function __construct($options = [], ?TransportInterface $transport = null)
    {
        if (!\is_array($options) && !($options instanceof \ArrayAccess)) {
            throw new \InvalidArgumentException(
                'The options param must be an array or implement the ArrayAccess interface.'
            );
        }

        $this->options = $options;

        if (!$transport) {
            $transport = (new HttpFactory())->getAvailableDriver($this->options);

            // Ensure the transport is a TransportInterface instance or bail out
            if (!($transport instanceof TransportInterface)) {
                throw new \InvalidArgumentException(sprintf('A valid %s object was not set.', TransportInterface::class));
            }
        }

        $this->transport = $transport;
    }

    /**
     * Get an option from the HTTP client.
     *
     * @param   string  $key      The name of the option to get.
     * @param   mixed   $default  The default value if the option is not set.
     *
     * @return  mixed  The option value.
     *
     * @since   1.0
     */
    public function getOption($key, $default = null)
    {
        return $this->options[$key] ?? $default;
    }

    /**
     * Set an option for the HTTP client.
     *
     * @param   string  $key    The name of the option to set.
     * @param   mixed   $value  The option value to set.
     *
     * @return  $this
     *
     * @since   1.0
     */
    public function setOption($key, $value)
    {
        $this->options[$key] = $value;

        return $this;
    }

    /**
     * Method to send the OPTIONS command to the server.
     *
     * @param   string|UriInterface  $url      The URI to the resource to request.
     * @param   array                $headers  An array of request headers to send with the request.
     * @param   integer              $timeout  Read timeout in seconds.
     *
     * @return  Response
     *
     * @since   1.0
     */
    public function options($url, array $headers = [], $timeout = null)
    {
        return $this->makeTransportRequest('OPTIONS', $url, null, $headers, $timeout);
    }

    /**
     * Method to send the HEAD command to the server.
     *
     * @param   string|UriInterface  $url      The URI to the resource to request.
     * @param   array                $headers  An array of request headers to send with the request.
     * @param   integer              $timeout  Read timeout in seconds.
     *
     * @return  Response
     *
     * @since   1.0
     */
    public function head($url, array $headers = [], $timeout = null)
    {
        return $this->makeTransportRequest('HEAD', $url, null, $headers, $timeout);
    }

    /**
     * Method to send the GET command to the server.
     *
     * @param   string|UriInterface  $url      The URI to the resource to request.
     * @param   array                $headers  An array of request headers to send with the request.
     * @param   integer              $timeout  Read timeout in seconds.
     *
     * @return  Response
     *
     * @since   1.0
     */
    public function get($url, array $headers = [], $timeout = null)
    {
        return $this->makeTransportRequest('GET', $url, null, $headers, $timeout);
    }

    /**
     * Method to send the POST command to the server.
     *
     * @param   string|UriInterface  $url      The URI to the resource to request.
     * @param   mixed                $data     Either an associative array or a string to be sent with the request.
     * @param   array                $headers  An array of request headers to send with the request.
     * @param   integer              $timeout  Read timeout in seconds.
     *
     * @return  Response
     *
     * @since   1.0
     */
    public function post($url, $data, array $headers = [], $timeout = null)
    {
        return $this->makeTransportRequest('POST', $url, $data, $headers, $timeout);
    }

    /**
     * Method to send the PUT command to the server.
     *
     * @param   string|UriInterface  $url      The URI to the resource to request.
     * @param   mixed                $data     Either an associative array or a string to be sent with the request.
     * @param   array                $headers  An array of request headers to send with the request.
     * @param   integer              $timeout  Read timeout in seconds.
     *
     * @return  Response
     *
     * @since   1.0
     */
    public function put($url, $data, array $headers = [], $timeout = null)
    {
        return $this->makeTransportRequest('PUT', $url, $data, $headers, $timeout);
    }

    /**
     * Method to send the DELETE command to the server.
     *
     * @param   string|UriInterface  $url      The URI to the resource to request.
     * @param   array                $headers  An array of request headers to send with the request.
     * @param   integer              $timeout  Read timeout in seconds.
     * @param   mixed                $data     Either an associative array or a string to be sent with the request.
     *
     * @return  Response
     *
     * @since   1.0
     */
    public function delete($url, array $headers = [], $timeout = null, $data = null)
    {
        return $this->makeTransportRequest('DELETE', $url, $data, $headers, $timeout);
    }

    /**
     * Method to send the TRACE command to the server.
     *
     * @param   string|UriInterface  $url      The URI to the resource to request.
     * @param   array                $headers  An array of request headers to send with the request.
     * @param   integer              $timeout  Read timeout in seconds.
     *
     * @return  Response
     *
     * @since   1.0
     */
    public function trace($url, array $headers = [], $timeout = null)
    {
        return $this->makeTransportRequest('TRACE', $url, null, $headers, $timeout);
    }

    /**
     * Method to send the PATCH command to the server.
     *
     * @param   string|UriInterface  $url      The URI to the resource to request.
     * @param   mixed                $data     Either an associative array or a string to be sent with the request.
     * @param   array                $headers  An array of request headers to send with the request.
     * @param   integer              $timeout  Read timeout in seconds.
     *
     * @return  Response
     *
     * @since   1.0
     */
    public function patch($url, $data, array $headers = [], $timeout = null)
    {
        return $this->makeTransportRequest('PATCH', $url, $data, $headers, $timeout);
    }

    /**
     * Sends a PSR-7 request and returns a PSR-7 response.
     *
     * @param   RequestInterface  $request  The PSR-7 request object.
     *
     * @return  ResponseInterface|Response
     *
     * @since   2.0.0
     */
    public function sendRequest(RequestInterface $request): ResponseInterface
    {
        $data = $request->getBody()->getContents();

        return $this->makeTransportRequest(
            $request->getMethod(),
            new Uri((string) $request->getUri()),
            empty($data) ? null : $data,
            $request->getHeaders()
        );
    }

    /**
     * Send a request to the server and return a Response object with the response.
     *
     * @param   string               $method   The HTTP method for sending the request.
     * @param   string|UriInterface  $url      The URI to the resource to request.
     * @param   mixed                $data     Either an associative array or a string to be sent with the request.
     * @param   array                $headers  An array of request headers to send with the request.
     * @param   integer              $timeout  Read timeout in seconds.
     *
     * @return  Response
     *
     * @since   1.0
     * @throws  \InvalidArgumentException
     */
    protected function makeTransportRequest($method, $url, $data = null, array $headers = [], $timeout = null)
    {
        // Look for headers set in the options.
        if (isset($this->options['headers'])) {
            $temp = (array) $this->options['headers'];

            foreach ($temp as $key => $val) {
                if (!isset($headers[$key])) {
                    $headers[$key] = $val;
                }
            }
        }

        // Look for timeout set in the options.
        if ($timeout === null && isset($this->options['timeout'])) {
            $timeout = $this->options['timeout'];
        }

        $userAgent = isset($this->options['userAgent']) ? $this->options['userAgent'] : null;

        // Convert to a Uri object if we were given a string
        if (\is_string($url)) {
            $url = new Uri($url);
        } elseif (!($url instanceof UriInterface)) {
            throw new \InvalidArgumentException(
                sprintf(
                    'A string or %s object must be provided, a "%s" was provided.',
                    UriInterface::class,
                    \gettype($url)
                )
            );
        }

        return $this->transport->request($method, $url, $data, $headers, $timeout, $userAgent);
    }
}
