<?php

/*
 * New PHP REST Framework
 *
 * Using Following SPECS
 * - HTTP Status Codes https://developer.mozilla.org/en-US/docs/Web/HTTP/Reference/Status
 * - HTTP Methods https://developer.mozilla.org/en-US/docs/Web/HTTP/Reference/Methods
 * - REST API https://restfulapi.net/http-methods/
 */

/**
 * Determines whether the incoming request has a JSON-based Content-Type.
 *
 * @param string|null $contentType Optional override for testing or CLI use.
 * @return bool True if the Content-Type indicates JSON.
 */
function req_isjson(?string $contentType = null): bool {
    // Get the header from the server if not provided
    $type = $contentType ?? ($_SERVER['CONTENT_TYPE'] ?? '');

    // Normalize and strip parameters like "; charset=utf-8"
    $type = strtolower(trim(explode(';', $type)[0]));

    // Known JSON-based media types
    $jsonTypes = [
        'application/json',
        'application/ld+json',
        'application/vnd.api+json', // JSON:API spec
        'text/json',                // Rare but occasionally seen
    ];

    return in_array($type, $jsonTypes, true);
}

function req_method($supported = ['GET','PUT','POST','DELETE','HEAD','OPTIONS'],?string $method = null): string {
    // Get the header from the server if not provided
    $method = $method ?? ($_SERVER['REQUEST_METHOD'] ?? '');
    if (!in_array($_SERVER['REQUEST_METHOD'], $supported)) {
      http_response_code(405);
      header('Allow: '. join(',',$supported));
      exit;
    }
    return $method;
}

if (req_isjson()) {
  $raw = file_get_contents('php://input');

  $post =json_decode($raw,true,1000,JSON_INVALID_UTF8_IGNORE);

  if (json_last_error() !== JSON_ERROR_NONE) {
    throw new JSONException('JSON: '.json_last_error_msg());
  }
} else {
  $post = $_REQUEST;
}
var_dump($_POST);
$req = (object)[
  'isjson' => req_isjson(),
  'method' => req_method(['GET','POST']),
  'path' => $_SERVER['PATH_INFO'] ?? '/',
  'post' => $post,
];

$res = (object)[
  'result' => 'ok',
  'req' => $req,
];


header('Content-Type: application/json');
echo json_encode([$res], JSON_UNESCAPED_SLASHES|JSON_PRETTY_PRINT);