<?php

namespace App\User;

use App_Settings_Obj as SettingsObj;
use Exception;
use Qs_Doc_Item;
use Qs_Mail;
use Qs_SiteMap;
use Zend_Registry;

class DiffMail
{
    /** @var  Diff */
    protected $data;

    public function __construct(array $previousData, array $currentData)
    {
        $this->data = new Diff($previousData, $currentData);
    }

    public function send()
    {
        if (!($updatedData = $this->data->getDiff())) {
            return false;
        }

        $subject = SettingsObj::get('changeProfileEmailSubject');
        $from = SettingsObj::getEmailFrom('changeProfileEmailFrom');
        $to = SettingsObj::getFormEmails('changeProfileEmailTo');
        $body = SettingsObj::get('changeProfileEmailBody');

        $data = $this->data->getData2();
        $data['link'] = BASE_URL_LANGUAGE;
        if (false !== ($link = Qs_SiteMap::findFirst(null, ['type' => 'User\\Admin\\'], null, 'url'))) {
            $query = ['action' => 'edit', 'id' => $data['id']];
            $data['link'] = $link . '?' . http_build_query($query);
        }
        $data['changedFields'] = $this->_renderChangedFields($updatedData);

        $escapedFields = ['changedFields'];
        foreach ($data as $field => $value) {
            if (is_array($value)) {
                continue;
            }
            if (!in_array($field, $escapedFields)) {
                $value = htmlspecialchars($value);
            }
            $body = str_replace('{' . $field . '}', $value, $body);
        }
        return $this->_sendMail(compact('subject', 'from', 'to', 'body'));
    }

    protected function _renderChangedFields(array $data)
    {
        /** @var \Qs_Doc $doc */
        $doc = Zend_Registry::get('doc');
        $smarty = $doc->getSmarty();
        $smarty->assign('DOC', $doc);
        $item['fields'] = $data;

        $smarty->assign('item', new Qs_Doc_Item($item));
        return $smarty->fetch('User/changed-fields-render.tpl');
    }

    protected function _sendMail($options)
    {
        $requiredOptions = ['from', 'to', 'subject', 'body'];
        $diff = array_diff_key(array_combine($requiredOptions, array_fill(0, count($requiredOptions), '')), $options);
        if (!empty($diff)) {
            throw new Exception('Missed required options: ' . implode(', ', array_keys($diff)));
        }
        $from = $to = $subject = $body = '';
        $attachments = [];
        extract($options);
        $mail = new Qs_Mail();
        $mail->setFrom($from);
        $mail->setSubject($subject);
        foreach ($attachments as $attachment) {
            $mail->attachFile($attachment);
        }
        Qs_Mail::cutImageBaseUrl($body, constant('BASE_URL'));
        $mail->setHtml($body, null, constant('WWW_PATH'));
        $mail->addTo($to);
        return $mail->send();
    }
}