<?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;

/**
 * HTTP factory class.
 *
 * @since  1.0
 */
class HttpFactory
{
    /**
     * Method to create an Http instance.
     *
     * @param   array|\ArrayAccess  $options   Client options array.
     * @param   array|string        $adapters  Adapter (string) or queue of adapters (array) to use for communication.
     *
     * @return  Http
     *
     * @since   1.0
     * @throws  \InvalidArgumentException
     * @throws  \RuntimeException
     */
    public function getHttp($options = [], $adapters = null)
    {
        if (!\is_array($options) && !($options instanceof \ArrayAccess)) {
            throw new \InvalidArgumentException(
                'The options param must be an array or implement the ArrayAccess interface.'
            );
        }

        if (!$driver = $this->getAvailableDriver($options, $adapters)) {
            throw new \RuntimeException('No transport driver available.');
        }

        return new Http($options, $driver);
    }

    /**
     * Finds an available TransportInterface object for communication
     *
     * @param   array|\ArrayAccess  $options  Options for creating TransportInterface object
     * @param   array|string        $default  Adapter (string) or queue of adapters (array) to use
     *
     * @return  TransportInterface|boolean  Interface sub-class or boolean false if no adapters are available
     *
     * @since   1.0
     * @throws  \InvalidArgumentException
     */
    public function getAvailableDriver($options = [], $default = null)
    {
        if (!\is_array($options) && !($options instanceof \ArrayAccess)) {
            throw new \InvalidArgumentException(
                'The options param must be an array or implement the ArrayAccess interface.'
            );
        }

        if ($default === null) {
            $availableAdapters = $this->getHttpTransports();
        } else {
            settype($default, 'array');
            $availableAdapters = $default;
        }

        // Check if there is at least one available http transport adapter
        if (!\count($availableAdapters)) {
            return false;
        }

        foreach ($availableAdapters as $adapter) {
            $class = __NAMESPACE__ . '\\Transport\\' . ucfirst($adapter);

            if (class_exists($class)) {
                if ($class::isSupported()) {
                    return new $class($options);
                }
            }
        }

        return false;
    }

    /**
     * Get the HTTP transport handlers
     *
     * @return  string[]  An array of available transport handler types
     *
     * @since   1.0
     */
    public function getHttpTransports()
    {
        $names    = [];
        $iterator = new \DirectoryIterator(__DIR__ . '/Transport');

        /** @var \DirectoryIterator $file */
        foreach ($iterator as $file) {
            $fileName = $file->getFilename();

            // Only load for php files.
            if ($file->isFile() && $file->getExtension() == 'php') {
                $names[] = substr($fileName, 0, strrpos($fileName, '.'));
            }
        }

        // Keep alphabetical order across all environments
        sort($names);

        // If curl is available set it to the first position
        $key = array_search('Curl', $names);

        if ($key) {
            unset($names[$key]);
            array_unshift($names, 'Curl');
        }

        return $names;
    }
}