<?php

// $Id$
// $URL$

namespace App\Model;

use Nette;

class MailMessage extends Nette\Mail\Message {
	/** @inject @var \App\Services\Config */
	public $cfg;

	private $envelopeFrom;
	public function getEnvelopeFrom() {
		if(isset($this->envelopeFrom))
			return $this->envelopeFrom;
		return implode(', ', array_keys($this->from));
	}

	public function setEnvelopeFrom($value) {
		$this->envelopeFrom = $value;
		return $this;
	}

	private $envelopeTo;
	public function getEnvelopeTo() {
		if(isset($this->envelopeTo))
			return $this->envelopeTo;
		$to_header = $this->getHeader('To');
		if(!is_null($to_header))
			return is_array($to_header) ? implode(',', array_keys($to_header)) : $to_header;
		return null;
	}

	public function setEnvelopeTo($value) {
		$this->envelopeTo = $value;
		return $this;
	}

	public function getReturnPath() {
		throw new \Exception("getReturnPath() is deprecated and should not be used");
	}

	public function setReturnPath($dummy) {
		throw new \Exception("setReturnPath() is deprecated and should not be used");
	}

	private function formatEmail($email, $name) {
		if($name)
			return [$email => $name];
		require_once 'Mail/RFC822.php';
		$rfc822 = new \Mail_RFC822;
		$structure = $rfc822->parseAddressList($email, '');
		if(count($structure) == 0)
			throw new \ErrorException("no address found");
		if(count($structure) != 1)
			throw new \ErrorException("multiple addresses found");
		$structure = $structure[0];
		if(array_key_exists('message', $structure))
			throw new \ErrorException("address could not be validated: ".$structure['message']);
		if(!array_key_exists('mailbox', $structure))
			throw new \ErrorException("not a plain address");
		$name = preg_replace('/^"(.*[^\\\\])?"\z/', '$1', $structure->personal);
		return [$structure->mailbox . '@' . $structure->host => $name];
	}

	public function setFrom($email, $name = null) {
		$this->setHeader('From', $this->formatEmail($email, $name));
		return $this;
	}

	public function addReplyTo($email, $name = null) {
		$this->setHeader('Reply-To', $this->formatEmail($email, $name), true);
		return $this;
	}

	public function addTo($email, $name = null) {
		$this->setHeader('To', $this->formatEmail($email, $name), true);
		return $this;
	}

	public function addCc($email, $name = null) {
		$this->setHeader('Cc', $this->formatEmail($email, $name), true);
		return $this;
	}

	public function addBcc($email, $name = null) {
		$this->setHeader('Bcc', $this->formatEmail($email, $name), true);
		return $this;
	}

	public function generateMessage() {
		$message_id = $this->getHeader('Message-ID');
		$built = $this->build();
		if(is_null($message_id))
			$built->setHeader('Message-ID', "<{$this->uuid4()}@{$this->cfg->messageid_host}>");
		else
			$built->setHeader('Message-ID', $message_id);
		return $built->getEncodedMessage();
	}

	public function uuid4() {
		$uuid = openssl_random_pseudo_bytes(16);
		$uuid[8] = chr(ord($uuid[8]) & 0x3F | 0x80);
		$uuid = bin2hex($uuid);
		$uuid[12] = 4;
		return preg_replace('/^.{8}|.{4}/', '$0-', $uuid, 4);
	}
}