<?php

declare (strict_types=1);
namespace Kazcode\WpStorage\Vendor\GuzzleHttp\Psr7;

use InvalidArgumentException;
use Kazcode\WpStorage\Vendor\Psr\Http\Message\RequestInterface;
use Kazcode\WpStorage\Vendor\Psr\Http\Message\StreamInterface;
use Kazcode\WpStorage\Vendor\Psr\Http\Message\UriInterface;
/**
 * PSR-7 request implementation.
 */
class Request implements RequestInterface
{
    use MessageTrait;
    private string $method;
    private ?string $requestTarget = null;
    private UriInterface $uri;
    /**
     * @param string                               $method  HTTP method
     * @param string|UriInterface                  $uri     URI
     * @param (string|string[])[]                  $headers Request headers
     * @param string|resource|StreamInterface|null $body    Request body
     * @param string                               $version Protocol version
     */
    public function __construct(string $method, $uri, array $headers = [], $body = null, string $version = '1.1')
    {
        $this->assertMethod($method);
        $this->assertProtocolVersion($version);
        if (!$uri instanceof UriInterface) {
            $uri = new Uri($uri);
        }
        self::getRequestTargetFromUri($uri);
        $this->method = $method;
        $this->uri = $uri;
        $this->setHeaders($headers);
        $this->protocol = $version;
        if (!isset($this->headerNames['host'])) {
            $this->updateHostFromUri();
        }
        if ($body !== '' && $body !== null) {
            $this->stream = Utils::streamFor($body);
        }
    }
    public function getRequestTarget(): string
    {
        if ($this->requestTarget !== null) {
            return $this->requestTarget;
        }
        return self::getRequestTargetFromUri($this->uri);
    }
    public function withRequestTarget(string $requestTarget): RequestInterface
    {
        self::assertRequestTarget($requestTarget);
        $new = clone $this;
        $new->requestTarget = $requestTarget;
        return $new;
    }
    public function getMethod(): string
    {
        return $this->method;
    }
    public function withMethod(string $method): RequestInterface
    {
        $this->assertMethod($method);
        $new = clone $this;
        $new->method = $method;
        return $new;
    }
    public function getUri(): UriInterface
    {
        return $this->uri;
    }
    public function withUri(UriInterface $uri, bool $preserveHost = \false): RequestInterface
    {
        $sameUri = $uri === $this->uri;
        if (!$sameUri && $this->requestTarget === null) {
            self::getRequestTargetFromUri($uri);
        }
        $currentHost = $this->getHeaderLine('Host');
        $host = null;
        if (!$preserveHost || $currentHost === '') {
            $host = $this->getHostFromUri($uri);
        }
        if ($sameUri && ($host === null || $currentHost === $host)) {
            return $this;
        }
        $new = clone $this;
        $new->uri = $uri;
        if ($host !== null) {
            $new->setHostHeader($host);
        }
        return $new;
    }
    private function updateHostFromUri(): void
    {
        $host = $this->getHostFromUri($this->uri);
        if ($host === null) {
            return;
        }
        $this->setHostHeader($host);
    }
    private function getHostFromUri(UriInterface $uri): ?string
    {
        $host = $uri->getHost();
        if ($host === '') {
            return null;
        }
        Uri::assertValidHost($host);
        if (($port = $uri->getPort()) !== null) {
            $host .= ':' . $port;
        }
        $this->assertValue('Host', $host);
        return $host;
    }
    private function setHostHeader(string $host): void
    {
        if (isset($this->headerNames['host'])) {
            $header = $this->headerNames['host'];
        } else {
            $header = 'Host';
            $this->headerNames['host'] = 'Host';
        }
        // Ensure Host is the first header.
        // See: https://datatracker.ietf.org/doc/html/rfc9110#section-7.2
        $this->headers = [$header => [$host]] + $this->headers;
    }
    private function assertMethod(string $method): void
    {
        if (!Rfc9110::isToken($method)) {
            throw new InvalidArgumentException('Method must be a valid HTTP token.');
        }
    }
    private static function getRequestTargetFromUri(UriInterface $uri): string
    {
        $target = self::normalizePathForOriginForm($uri->getPath());
        if ($target === '') {
            $target = '/';
        }
        if ($uri->getQuery() != '') {
            $target .= '?' . $uri->getQuery();
        }
        self::assertRequestTarget($target);
        return $target;
    }
    private static function assertRequestTarget(string $requestTarget): void
    {
        if (!Rfc9112::isValidRequestTarget($requestTarget)) {
            throw new InvalidArgumentException('Invalid request target provided; cannot be empty or contain whitespace or control characters');
        }
    }
    private static function normalizePathForOriginForm(string $path): string
    {
        if (str_starts_with($path, '//')) {
            return '/' . ltrim($path, '/');
        }
        return $path;
    }
}
