<?php
/*
* File: Header.php
* Category: -
* Author: M.Goldenbaum
* Created: 17.09.20 20:38
* Updated: -
*
* Description:
*  -
*/

namespace Webklex\PHPIMAP;


use Carbon\Carbon;
use Webklex\PHPIMAP\Exceptions\InvalidMessageDateException;
use Webklex\PHPIMAP\Exceptions\MethodNotFoundException;

/**
 * Class Header
 *
 * @package Webklex\PHPIMAP
 */
class Header {

    /**
     * Raw header
     *
     * @var string $raw
     */
    public string $raw = "";

    /**
     * Attribute holder
     *
     * @var Attribute[]|array $attributes
     */
    protected array $attributes = [];

    /**
     * Config holder
     *
     * @var Config $config
     */
    protected Config $config;

    /**
     * Config holder
     *
     * @var array $options
     */
    protected array $options = [];

    /**
     * Fallback Encoding
     *
     * @var string
     */
    public string $fallback_encoding = 'UTF-8';

    /**
     * Header constructor.
     * @param Config $config
     * @param string $raw_header
     *
     * @throws InvalidMessageDateException
     */
    public function __construct(string $raw_header, Config $config) {
        $this->raw = $raw_header;
        $this->config = $config;
        $this->options = $this->config->get('options');
        $this->parse();
    }

    /**
     * Call dynamic attribute setter and getter methods
     * @param string $method
     * @param array $arguments
     *
     * @return Attribute|mixed
     * @throws MethodNotFoundException
     */
    public function __call(string $method, array $arguments) {
        if (strtolower(substr($method, 0, 3)) === 'get') {
            $name = preg_replace('/(.)(?=[A-Z])/u', '$1_', substr(strtolower($method), 3));

            if (in_array($name, array_keys($this->attributes))) {
                return $this->attributes[$name];
            }

        }

        throw new MethodNotFoundException("Method " . self::class . '::' . $method . '() is not supported');
    }

    /**
     * Magic getter
     * @param $name
     *
     * @return Attribute|null
     */
    public function __get($name) {
        return $this->get($name);
    }

    /**
     * Get a specific header attribute
     * @param $name
     *
     * @return Attribute
     */
    public function get($name): Attribute {
        $name = str_replace(["-", " "], "_", strtolower($name));
        if (isset($this->attributes[$name])) {
            return $this->attributes[$name];
        }

        return new Attribute($name);
    }

    /**
     * Check if a specific attribute exists
     * @param string $name
     *
     * @return bool
     */
    public function has(string $name): bool {
        $name = str_replace(["-", " "], "_", strtolower($name));
        return isset($this->attributes[$name]);
    }

    /**
     * Set a specific attribute
     * @param string $name
     * @param array|mixed $value
     * @param boolean $strict
     *
     * @return Attribute|array
     */
    public function set(string $name, mixed $value, bool $strict = false): Attribute|array {
        if (isset($this->attributes[$name]) && $strict === false) {
            $this->attributes[$name]->add($value, true);
        } else {
            $this->attributes[$name] = new Attribute($name, $value);
        }

        return $this->attributes[$name];
    }

    /**
     * Perform a regex match all on the raw header and return the first result
     * @param $pattern
     *
     * @return mixed|null
     */
    public function find($pattern): mixed {
        if (preg_match_all($pattern, $this->raw, $matches)) {
            if (isset($matches[1])) {
                if (count($matches[1]) > 0) {
                    return $matches[1][0];
                }
            }
        }
        return null;
    }

    /**
     * Try to find a boundary if possible
     *
     * @return string|null
     */
    public function getBoundary(): ?string {
        $regex = $this->options["boundary"] ?? "/boundary=(.*?(?=;)|(.*))/i";
        $boundary = $this->find($regex);

        if ($boundary === null) {
            return null;
        }

        return $this->clearBoundaryString($boundary);
    }

    /**
     * Remove all unwanted chars from a given boundary
     * @param string $str
     *
     * @return string
     */
    private function clearBoundaryString(string $str): string {
        return str_replace(['"', '\r', '\n', "\n", "\r", ";", "\s"], "", $str);
    }

    /**
     * Parse the raw headers
     *
     * @throws InvalidMessageDateException
     */
    protected function parse(): void {
        $header = $this->rfc822_parse_headers($this->raw);

        $this->extractAddresses($header);

        if (property_exists($header, 'subject')) {
            $this->set("subject", $this->decode($header->subject));
        }
        if (property_exists($header, 'references')) {
            $this->set("references", array_map(function($item) {
                return str_replace(['<', '>'], '', $item);
            }, explode(" ", $header->references)));
        }
        if (property_exists($header, 'message_id')) {
            $this->set("message_id", str_replace(['<', '>'], '', $header->message_id));
        }
        if (property_exists($header, 'in_reply_to')) {
            $this->set("in_reply_to", str_replace(['<', '>'], '', $header->in_reply_to));
        }

        $this->parseDate($header);
        foreach ($header as $key => $value) {
            $key = trim(rtrim(strtolower($key)));
            if (!isset($this->attributes[$key])) {
                $this->set($key, $value);
            }
        }

        $this->extractHeaderExtensions();
        $this->findPriority();
    }

    /**
     * Parse mail headers from a string
     * @link https://php.net/manual/en/function.imap-rfc822-parse-headers.php
     * @param $raw_headers
     *
     * @return object
     */
    public function rfc822_parse_headers($raw_headers): object {
        $headers = [];
        $imap_headers = [];
        if (extension_loaded('imap') && $this->options["rfc822"]) {
            $raw_imap_headers = (array)\imap_rfc822_parse_headers($raw_headers);
            foreach ($raw_imap_headers as $key => $values) {
                $key = strtolower(str_replace("-", "_", $key));
                $imap_headers[$key] = $values;
            }
        }
        $lines = explode("\r\n", preg_replace("/\r\n\s/", ' ', $raw_headers));
        $prev_header = null;
        foreach ($lines as $line) {
            if (str_starts_with($line, "\n")) {
                $line = substr($line, 1);
            }

            if (str_starts_with($line, "\t")) {
                $line = substr($line, 1);
                $line = trim(rtrim($line));
                if ($prev_header !== null) {
                    $headers[$prev_header][] = $line;
                }
            } elseif (str_starts_with($line, " ")) {
                $line = substr($line, 1);
                $line = trim(rtrim($line));
                if ($prev_header !== null) {
                    if (!isset($headers[$prev_header])) {
                        $headers[$prev_header] = "";
                    }
                    if (is_array($headers[$prev_header])) {
                        $headers[$prev_header][] = $line;
                    } else {
                        $headers[$prev_header] .= $line;
                    }
                }
            } else {
                if (($pos = strpos($line, ":")) > 0) {
                    $key = trim(rtrim(strtolower(substr($line, 0, $pos))));
                    $key = strtolower(str_replace("-", "_", $key));

                    $value = trim(rtrim(substr($line, $pos + 1)));
                    if (isset($headers[$key])) {
                        $headers[$key][] = $value;
                    } else {
                        $headers[$key] = [$value];
                    }
                    $prev_header = $key;
                }
            }
        }

        foreach ($headers as $key => $values) {
            if (isset($imap_headers[$key])) {
                continue;
            }
            $value = null;
            switch ((string)$key) {
                case 'from':
                case 'to':
                case 'cc':
                case 'bcc':
                case 'reply_to':
                case 'sender':
                    $value = $this->decodeAddresses($values);
                    $headers[$key . "address"] = implode(", ", $values);
                    break;
                case 'subject':
                    $value = implode(" ", $values);
                    break;
                default:
                    if (is_array($values)) {
                        foreach ($values as $k => $v) {
                            if ($v == "") {
                                unset($values[$k]);
                            }
                        }
                        $available_values = count($values);
                        if ($available_values === 1) {
                            $value = array_pop($values);
                        } elseif ($available_values === 2) {
                            $value = implode(" ", $values);
                        } elseif ($available_values > 2) {
                            $value = array_values($values);
                        } else {
                            $value = "";
                        }
                    }
                    break;
            }
            $headers[$key] = $value;
        }

        return (object)array_merge($headers, $imap_headers);
    }

    /**
     * Decode MIME header elements
     * @link https://php.net/manual/en/function.imap-mime-header-decode.php
     * @param string $text The MIME text
     *
     * @return array The decoded elements are returned in an array of objects, where each
     * object has two properties, charset and text.
     */
    public function mime_header_decode(string $text): array {
        if (extension_loaded('imap')) {
            $result = \imap_mime_header_decode($text);
            return is_array($result) ? $result : [];
        }
        $charset = $this->getEncoding($text);
        return [(object)[
            "charset" => $charset,
            "text"    => $this->convertEncoding($text, $charset)
        ]];
    }

    /**
     * Check if a given pair of strings has been decoded
     * @param $encoded
     * @param $decoded
     *
     * @return bool
     */
    private function notDecoded($encoded, $decoded): bool {
        return str_starts_with($decoded, '=?')
            && strlen($decoded) - 2 === strpos($decoded, '?=')
            && str_contains($encoded, $decoded);
    }

    /**
     * Convert the encoding
     * @param $str
     * @param string $from
     * @param string $to
     *
     * @return mixed|string
     */
    public function convertEncoding($str, string $from = "ISO-8859-2", string $to = "UTF-8"): mixed {
        $from = EncodingAliases::get($from, $this->fallback_encoding);
        $to = EncodingAliases::get($to, $this->fallback_encoding);

        if ($from === $to) {
            return $str;
        }

        return EncodingAliases::convert($str, $from, $to);
    }

    /**
     * Get the encoding of a given abject
     * @param object|string $structure
     *
     * @return string
     */
    public function getEncoding(object|string $structure): string {
        if (property_exists($structure, 'parameters')) {
            foreach ($structure->parameters as $parameter) {
                if (strtolower($parameter->attribute) == "charset") {
                    return EncodingAliases::get($parameter->value, $this->fallback_encoding);
                }
            }
        } elseif (property_exists($structure, 'charset')) {
            return EncodingAliases::get($structure->charset, $this->fallback_encoding);
        } elseif (is_string($structure) === true) {
            $result = mb_detect_encoding($structure);
            return $result === false ? $this->fallback_encoding : $result;
        }

        return $this->fallback_encoding;
    }

    /**
     * Test if a given value is utf-8 encoded
     * @param $value
     *
     * @return bool
     */
    private function is_uft8($value): bool {
        return str_starts_with(strtolower($value), '=?utf-8?');
    }

    /**
     * Try to decode a specific header
     * @param mixed $value
     *
     * @return mixed
     */
    public function decode(mixed $value): mixed {
        if (is_array($value)) {
            return $this->decodeArray($value);
        }
        $original_value = $value;
        $decoder = $this->options['decoder']['message'];

        if ($value !== null) {
            if ($decoder === 'utf-8') {
                $decoded_values = $this->mime_header_decode($value);
                $tempValue = "";
                foreach ($decoded_values as $decoded_value) {
                    $tempValue .= $this->convertEncoding($decoded_value->text, $decoded_value->charset);
                }
                if ($tempValue) {
                    $value = $tempValue;
                } else if (extension_loaded('imap')) {
                    $value = \imap_utf8($value);
                } else if (function_exists('iconv_mime_decode')) {
                    $value = iconv_mime_decode($value, ICONV_MIME_DECODE_CONTINUE_ON_ERROR, "UTF-8");
                } else {
                    $value = mb_decode_mimeheader($value);
                }
            } elseif ($decoder === 'iconv') {
                $value = iconv_mime_decode($value, ICONV_MIME_DECODE_CONTINUE_ON_ERROR, "UTF-8");
            } else if ($this->is_uft8($value)) {
                $value = mb_decode_mimeheader($value);
            }

            if ($this->notDecoded($original_value, $value)) {
                $value = $this->convertEncoding($original_value, $this->getEncoding($original_value));
            }
        }

        return $value;
    }

    /**
     * Decode a given array
     * @param array $values
     *
     * @return array
     */
    private function decodeArray(array $values): array {
        foreach ($values as $key => $value) {
            $values[$key] = $this->decode($value);
        }
        return $values;
    }

    /**
     * Try to extract the priority from a given raw header string
     */
    private function findPriority(): void {
        $priority = $this->get("x_priority");

        $priority = match ((int)"$priority") {
            IMAP::MESSAGE_PRIORITY_HIGHEST => IMAP::MESSAGE_PRIORITY_HIGHEST,
            IMAP::MESSAGE_PRIORITY_HIGH => IMAP::MESSAGE_PRIORITY_HIGH,
            IMAP::MESSAGE_PRIORITY_NORMAL => IMAP::MESSAGE_PRIORITY_NORMAL,
            IMAP::MESSAGE_PRIORITY_LOW => IMAP::MESSAGE_PRIORITY_LOW,
            IMAP::MESSAGE_PRIORITY_LOWEST => IMAP::MESSAGE_PRIORITY_LOWEST,
            default => IMAP::MESSAGE_PRIORITY_UNKNOWN,
        };

        $this->set("priority", $priority);
    }

    /**
     * Extract a given part as address array from a given header
     * @param $values
     *
     * @return array
     */
    private function decodeAddresses($values): array {
        $addresses = [];

        if (extension_loaded('mailparse') && $this->options["rfc822"]) {
            foreach ($values as $address) {
                foreach (\mailparse_rfc822_parse_addresses($address) as $parsed_address) {
                    if (isset($parsed_address['address'])) {
                        $mail_address = explode('@', $parsed_address['address']);
                        if (count($mail_address) == 2) {
                            $addresses[] = (object)[
                                "personal" => $parsed_address['display'] ?? '',
                                "mailbox"  => $mail_address[0],
                                "host"     => $mail_address[1],
                            ];
                        }
                    }
                }
            }

            return $addresses;
        }

        foreach ($values as $address) {
            foreach (preg_split('/, ?(?=(?:[^"]*"[^"]*")*[^"]*$)/', $address) as $split_address) {
                $split_address = trim(rtrim($split_address));

                if (strpos($split_address, ",") == strlen($split_address) - 1) {
                    $split_address = substr($split_address, 0, -1);
                }
                if (preg_match(
                    '/^(?:(?P<name>.+)\s)?(?(name)<|<?)(?P<email>[^\s]+?)(?(name)>|>?)$/',
                    $split_address,
                    $matches
                )) {
                    $name = trim(rtrim($matches["name"]));
                    $email = trim(rtrim($matches["email"]));
                    list($mailbox, $host) = array_pad(explode("@", $email), 2, null);
                    $addresses[] = (object)[
                        "personal" => $name,
                        "mailbox"  => $mailbox,
                        "host"     => $host,
                    ];
                }
            }
        }

        return $addresses;
    }

    /**
     * Extract a given part as address array from a given header
     * @param object $header
     */
    private function extractAddresses(object $header): void {
        foreach (['from', 'to', 'cc', 'bcc', 'reply_to', 'sender'] as $key) {
            if (property_exists($header, $key)) {
                $this->set($key, $this->parseAddresses($header->$key));
            }
        }
    }

    /**
     * Parse Addresses
     * @param $list
     *
     * @return array
     */
    private function parseAddresses($list): array {
        $addresses = [];

        if (is_array($list) === false) {
            return $addresses;
        }

        foreach ($list as $item) {
            $address = (object)$item;

            if (!property_exists($address, 'mailbox')) {
                $address->mailbox = false;
            }
            if (!property_exists($address, 'host')) {
                $address->host = false;
            }
            if (!property_exists($address, 'personal')) {
                $address->personal = false;
            } else {
                $personalParts = $this->mime_header_decode($address->personal);

                $address->personal = '';
                foreach ($personalParts as $p) {
                    $address->personal .= $this->convertEncoding($p->text, $this->getEncoding($p));
                }

                if (str_starts_with($address->personal, "'")) {
                    $address->personal = str_replace("'", "", $address->personal);
                }
            }

            if ($address->host == ".SYNTAX-ERROR.") {
                $address->host = "";
            }
            if ($address->mailbox == "UNEXPECTED_DATA_AFTER_ADDRESS") {
                $address->mailbox = "";
            }

            $address->mail = ($address->mailbox && $address->host) ? $address->mailbox . '@' . $address->host : false;
            $address->full = ($address->personal) ? $address->personal . ' <' . $address->mail . '>' : $address->mail;

            $addresses[] = new Address($address);
        }

        return $addresses;
    }

    /**
     * Search and extract potential header extensions
     */
    private function extractHeaderExtensions(): void {
        foreach ($this->attributes as $key => $value) {
            if (is_array($value)) {
                $value = implode(", ", $value);
            } else {
                $value = (string)$value;
            }
            // Only parse strings and don't parse any attributes like the user-agent
            if (!in_array($key, ["user-agent", "subject"])) {
                if (($pos = strpos($value, ";")) !== false) {
                    $original = substr($value, 0, $pos);
                    $this->set($key, trim(rtrim($original)));

                    // Get all potential extensions
                    $extensions = explode(";", substr($value, $pos + 1));
                    $previousKey = null;
                    $previousValue = '';

                    foreach ($extensions as $extension) {
                        if (($pos = strpos($extension, "=")) !== false) {
                            $key = substr($extension, 0, $pos);
                            $key = trim(rtrim(strtolower($key)));

                            $matches = [];

                            if (preg_match('/^(?P<key_name>\w+)\*/', $key, $matches) !== 0) {
                                $key = $matches['key_name'];
                                $previousKey = $key;

                                $value = substr($extension, $pos + 1);
                                $value = str_replace('"', "", $value);
                                $previousValue .= trim(rtrim($value));

                                continue;
                            }

                            if (
                                $previousKey !== null
                                && $previousKey !== $key
                                && isset($this->attributes[$previousKey]) === false
                            ) {
                                $this->set($previousKey, $previousValue);

                                $previousValue = '';
                            }

                            if (isset($this->attributes[$key]) === false) {
                                $value = substr($extension, $pos + 1);
                                $value = str_replace('"', "", $value);
                                $value = trim(rtrim($value));

                                $this->set($key, $value);
                            }

                            $previousKey = $key;
                        }
                    }
                    if ($previousValue !== '') {
                        $this->set($previousKey, $previousValue);
                    }
                }
            }
        }
    }

    /**
     * Exception handling for invalid dates
     *
     * Known bad and "invalid" formats:
     * ^ Datetime                                   ^ Problem                           ^ Cause
     * | Mon, 20 Nov 2017 20:31:31 +0800 (GMT+8:00) | Double timezone specification     | A Windows feature
     * | Thu, 8 Nov 2018 08:54:58 -0200 (-02)       |
     * |                                            | and invalid timezone (max 6 char) |
     * | 04 Jan 2018 10:12:47 UT                    | Missing letter "C"                | Unknown
     * | Thu, 31 May 2018 18:15:00 +0800 (added by) | Non-standard details added by the | Unknown
     * |                                            | mail server                       |
     * | Sat, 31 Aug 2013 20:08:23 +0580            | Invalid timezone                  | PHPMailer bug https://sourceforge.net/p/phpmailer/mailman/message/6132703/
     *
     * Please report any new invalid timestamps to [#45](https://github.com/Webklex/php-imap/issues)
     *
     * @param object $header
     *
     * @throws InvalidMessageDateException
     */
    private function parseDate(object $header): void {

        if (property_exists($header, 'date')) {
            $date = $header->date;

            if (preg_match('/\+0580/', $date)) {
                $date = str_replace('+0580', '+0530', $date);
            }

            $date = trim(rtrim($date));
            try {
                if (str_contains($date, '&nbsp;')) {
                    $date = str_replace('&nbsp;', ' ', $date);
                }
                if (str_contains($date, ' UT ')) {
                    $date = str_replace(' UT ', ' UTC ', $date);
                }
                $parsed_date = Carbon::parse($date);
            } catch (\Exception $e) {
                switch (true) {
                    case preg_match('/([0-9]{4}\.[0-9]{1,2}\.[0-9]{1,2}\-[0-9]{1,2}\.[0-9]{1,2}.[0-9]{1,2})+$/i', $date) > 0:
                        $date = Carbon::createFromFormat("Y.m.d-H.i.s", $date);
                        break;
                    case preg_match('/([0-9]{2} [A-Z]{3} [0-9]{4} [0-9]{1,2}:[0-9]{1,2}:[0-9]{1,2} [+-][0-9]{1,4} [0-9]{1,2}:[0-9]{1,2}:[0-9]{1,2} [+-][0-9]{1,4})+$/i', $date) > 0:
                        $parts = explode(' ', $date);
                        array_splice($parts, -2);
                        $date = implode(' ', $parts);
                        break;
                    case preg_match('/([A-Z]{2,4}\,\ [0-9]{1,2}\ [A-Z]{2,3}\ [0-9]{4}\ [0-9]{1,2}\:[0-9]{1,2}\:[0-9]{1,2}\ [\-|\+][0-9]{4})+$/i', $date) > 0:
                        $array = explode(',', $date);
                        array_shift($array);
                        $date = Carbon::createFromFormat("d M Y H:i:s O", trim(implode(',', $array)));
                        break;
                    case preg_match('/([0-9]{1,2}\ [A-Z]{2,3}\ [0-9]{4}\ [0-9]{1,2}\:[0-9]{1,2}\:[0-9]{1,2}\ UT)+$/i', $date) > 0:
                    case preg_match('/([A-Z]{2,3}\,\ [0-9]{1,2}\ [A-Z]{2,3}\ ([0-9]{2}|[0-9]{4})\ [0-9]{1,2}\:[0-9]{1,2}\:[0-9]{1,2}\ UT)+$/i', $date) > 0:
                        $date .= 'C';
                        break;
                    case preg_match('/([A-Z]{2,3}\,\ [0-9]{1,2}[\,]\ [A-Z]{2,3}\ [0-9]{4}\ [0-9]{1,2}\:[0-9]{1,2}\:[0-9]{1,2}\ [\-|\+][0-9]{4})+$/i', $date) > 0:
                        $date = str_replace(',', '', $date);
                        break;
                    // match case for: Di., 15 Feb. 2022 06:52:44 +0100 (MEZ)/Di., 15 Feb. 2022 06:52:44 +0100 (MEZ)
                    case preg_match('/([A-Z]{2,3}\.\,\ [0-9]{1,2}\ [A-Z]{2,3}\.\ [0-9]{4}\ [0-9]{1,2}\:[0-9]{1,2}\:[0-9]{1,2}\ [\-|\+][0-9]{4}\ \([A-Z]{3,4}\))\/([A-Z]{2,3}\.\,\ [0-9]{1,2}\ [A-Z]{2,3}\.\ [0-9]{4}\ [0-9]{1,2}\:[0-9]{1,2}\:[0-9]{1,2}\ [\-|\+][0-9]{4}\ \([A-Z]{3,4}\))+$/i', $date) > 0:
                        $dates = explode('/', $date);
                        $date = array_shift($dates);
                        $array = explode(',', $date);
                        array_shift($array);
                        $date = trim(implode(',', $array));
                        $array = explode(' ', $date);
                        array_pop($array);
                        $date = trim(implode(' ', $array));
                        $date = Carbon::createFromFormat("d M. Y H:i:s O", $date);
                        break;
                    // match case for: fr., 25 nov. 2022 06:27:14 +0100/fr., 25 nov. 2022 06:27:14 +0100
                    case preg_match('/([A-Z]{2,3}\.\,\ [0-9]{1,2}\ [A-Z]{2,3}\.\ [0-9]{4}\ [0-9]{1,2}\:[0-9]{1,2}\:[0-9]{1,2}\ [\-|\+][0-9]{4})\/([A-Z]{2,3}\.\,\ [0-9]{1,2}\ [A-Z]{2,3}\.\ [0-9]{4}\ [0-9]{1,2}\:[0-9]{1,2}\:[0-9]{1,2}\ [\-|\+][0-9]{4})+$/i', $date) > 0:
                        $dates = explode('/', $date);
                        $date = array_shift($dates);
                        $array = explode(',', $date);
                        array_shift($array);
                        $date = trim(implode(',', $array));
                        $date = Carbon::createFromFormat("d M. Y H:i:s O", $date);
                        break;
                    case preg_match('/([A-Z]{2,3}\,\ [0-9]{1,2}\ [A-Z]{2,3}\ [0-9]{4}\ [0-9]{1,2}\:[0-9]{1,2}\:[0-9]{1,2}\ \+[0-9]{2,4}\ \(\+[0-9]{1,2}\))+$/i', $date) > 0:
                    case preg_match('/([A-Z]{2,3}[\,|\ \,]\ [0-9]{1,2}\ [A-Z]{2,3}\ [0-9]{4}\ [0-9]{1,2}\:[0-9]{1,2}\:[0-9]{1,2}.*)+$/i', $date) > 0:
                    case preg_match('/([A-Z]{2,3}\,\ [0-9]{1,2}\ [A-Z]{2,3}\ [0-9]{4}\ [0-9]{1,2}\:[0-9]{1,2}\:[0-9]{1,2}\ [\-|\+][0-9]{4}\ \(.*)\)+$/i', $date) > 0:
                    case preg_match('/([A-Z]{2,3}\, \ [0-9]{1,2}\ [A-Z]{2,3}\ [0-9]{4}\ [0-9]{1,2}\:[0-9]{1,2}\:[0-9]{1,2}\ [\-|\+][0-9]{4}\ \(.*)\)+$/i', $date) > 0:
                    case preg_match('/([0-9]{1,2}\ [A-Z]{2,3}\ [0-9]{2,4}\ [0-9]{2}\:[0-9]{2}\:[0-9]{2}\ [A-Z]{2}\ \-[0-9]{2}\:[0-9]{2}\ \([A-Z]{2,3}\ \-[0-9]{2}:[0-9]{2}\))+$/i', $date) > 0:
                        $array = explode('(', $date);
                        $array = array_reverse($array);
                        $date = trim(array_pop($array));
                        break;
                }
                try {
                    $parsed_date = Carbon::parse($date);
                } catch (\Exception $_e) {
                    if (!isset($this->options["fallback_date"])) {
                        throw new InvalidMessageDateException("Invalid message date. ID:" . $this->get("message_id") . " Date:" . $header->date . "/" . $date, 1100, $e);
                    } else {
                        $parsed_date = Carbon::parse($this->options["fallback_date"]);
                    }
                }
            }

            $this->set("date", $parsed_date);
        }
    }

    /**
     * Get all available attributes
     *
     * @return array
     */
    public function getAttributes(): array {
        return $this->attributes;
    }

    /**
     * Set all header attributes
     * @param array $attributes
     *
     * @return Header
     */
    public function setAttributes(array $attributes): Header {
        $this->attributes = $attributes;
        return $this;
    }

    /**
     * Set the configuration used for parsing a raw header
     * @param array $config
     *
     * @return Header
     */
    public function setOptions(array $config): Header {
        $this->options = $config;
        return $this;
    }

    /**
     * Get the configuration used for parsing a raw header
     *
     * @return array
     */
    public function getOptions(): array {
        return $this->options;
    }

    /**
     * Set the configuration used for parsing a raw header
     * @param Config $config
     *
     * @return Header
     */
    public function setConfig(Config $config): Header {
        $this->config = $config;
        return $this;
    }

    /**
     * Get the configuration used for parsing a raw header
     *
     * @return Config
     */
    public function getConfig(): Config {
        return $this->config;
    }

}
