<?php

/**
 * This file is part of CodeIgniter 4 framework.
 *
 * (c) CodeIgniter Foundation <admin@codeigniter.com>
 *
 * For the full copyright and license information, please view
 * the LICENSE file that was distributed with this source code.
 */

namespace CodeIgniter\HTTP;

use CodeIgniter\Validation\FormatRules;

/**
 * Representation of an HTTP request.
 */
class Request extends Message implements MessageInterface, RequestInterface
{
    use RequestTrait;

    /**
     * Proxy IPs
     *
     * @var array<string, string>
     *
     * @deprecated Check the App config directly
     */
    protected $proxyIPs;

    /**
     * Request method.
     *
     * @var string
     */
    protected $method;

    /**
     * A URI instance.
     *
     * @var URI
     */
    protected $uri;

    /**
     * Constructor.
     *
     * @param object $config
     *
     * @deprecated The $config is no longer needed and will be removed in a future version
     */
    public function __construct($config = null)
    {
        /**
         * @deprecated $this->proxyIps property will be removed in the future
         */
        $this->proxyIPs = $config->proxyIPs;

        if (empty($this->method)) {
            $this->method = $this->getServer('REQUEST_METHOD') ?? 'GET';
        }

        if (empty($this->uri)) {
            $this->uri = new URI();
        }
    }

    /**
     * Validate an IP address
     *
     * @param string $ip    IP Address
     * @param string $which IP protocol: 'ipv4' or 'ipv6'
     *
     * @deprecated Use Validation instead
     *
     * @codeCoverageIgnore
     */
    public function isValidIP(?string $ip = null, ?string $which = null): bool
    {
        return (new FormatRules())->valid_ip($ip, $which);
    }

    /**
     * Get the request method.
     *
     * @param bool $upper Whether to return in upper or lower case.
     *
     * @deprecated The $upper functionality will be removed and this will revert to its PSR-7 equivalent
     *
     * @codeCoverageIgnore
     */
    public function getMethod(bool $upper = false): string
    {
        return ($upper) ? strtoupper($this->method) : strtolower($this->method);
    }

    /**
     * Sets the request method. Used when spoofing the request.
     *
     * @return $this
     *
     * @deprecated Use withMethod() instead for immutability
     *
     * @codeCoverageIgnore
     */
    public function setMethod(string $method)
    {
        $this->method = $method;

        return $this;
    }

    /**
     * Returns an instance with the specified method.
     *
     * @param string $method
     *
     * @return static
     */
    public function withMethod($method)
    {
        $request = clone $this;

        $request->method = $method;

        return $request;
    }

    /**
     * Retrieves the URI instance.
     *
     * @return URI
     */
    public function getUri()
    {
        return $this->uri;
    }
}
