<?php
require_once $_SERVER['DOCUMENT_ROOT'] . "/wp-load.php";

use PHPMailer\PHPMailer\PHPMailer;

if (!empty($_GET['phone']) && !empty($_GET['name'])) {
    acceptOrder();
} else {

    sendJsonResponse([
        'status'      => 'failed',
        'description' => 'Не переданы обязательные поля: Имя и Телефон'
    ]);
}

function acceptOrder()
{
    $dateTime = new DateTime('now');
    $dateTime = $dateTime->format('j.m, h:m');

    $acceptingFields = [];

    foreach (['phone', 'name', 'email'] as $fieldTitle) {
        if (!empty($_POST[$fieldTitle])) {
            $acceptingFields[$fieldTitle] =
                stripslashes(trim(htmlspecialchars($_POST[$fieldTitle])));
        }
    }

    $orderMessage = "{$dateTime}\r\n";

    foreach ($acceptingFields as $acceptingFieldKey => $acceptingField) {
        switch ($acceptingFieldKey) {
            case 'phone':
                $orderMessage .= "Телефон: {$acceptingField}\r\n";
                break;
            case 'name':
                $orderMessage .= "Имя: {$acceptingField}\r\n";
                break;
            case 'email':
                $orderMessage .= "Адрес электронной почты: {$acceptingField}\r\n";
                break;
        }
    }

    wp_insert_post([
        'post_type'    => 'callback_requests',
        'post_title'   => "{$dateTime}, {$acceptingFields['name']}, {$acceptingFields['phone']}",
        'post_content' => $orderMessage,
        'post_status'  => 'publish'
    ]);

    $resultSending = sendJsonResponse(null, true);
    fastcgi_finish_request();

    $clientEmailSubscribers = get_field('mail_subscribers', 'option');

    if (empty($clientEmailSubscribers)) {
        return true;
    } else {

        $clientEmailSubscribersFormatted = [];

        foreach ($clientEmailSubscribers as $emailSubscriber):
            if (empty($emailSubscriber['address'])) {
                continue;
            }
            array_push($clientEmailSubscribersFormatted, $emailSubscriber['address']);
        endforeach;

        if (empty($clientEmailSubscribersFormatted)) {
            return true;
        } else {
            return sendEmailNotificationAboutOrder($clientEmailSubscribersFormatted, $orderMessage);
        }
    }
}

function sendEmailNotificationAboutOrder($clientEmails, $msg)
{
    $msg = str_replace("\r\n", "<br>", $msg);

    $phpMailer            = new PHPMailer(true);
    $phpMailer->SMTPDebug = 0;
    $phpMailer->isSMTP();
    $phpMailer->CharSet  = 'UTF-8';
    $phpMailer->Encoding = 'base64';

    $phpMailer->Host       = 'smtp.yandex.ru';
    $phpMailer->SMTPAuth   = true;
    $phpMailer->Username   = 'landauinc@yandex.ru';
    $phpMailer->Password   = 'SoHard4u';
    $phpMailer->SMTPSecure = 'ssl';
    $phpMailer->Port       = 465;

    try {
        $phpMailer->setFrom('landauinc@yandex.ru', 'Landau inc');
    } catch (Exception $exception) {
        return true;
    }

    $phpMailer->isHTML(1);

    $phpMailer->Subject = "УЭК: Заявка с сайта";
    $phpMailer->Body    = $msg;

    try {
        foreach ($clientEmails as $subscriber) {
            $phpMailer->addAddress($subscriber);
        }
    } catch (Exception $exception) {
        return true;
    }


    try {
        $phpMailer->send();
    } catch (Exception $exception) {
        return true;
    }

    return true;
}

function sendJsonResponse(array $data = null, $returnSuccess = false)
{
    header('Content-Type: json');

    if ($returnSuccess === true) {
        $data = [
            'status'  => 'status',
            'message' => 'Заявка успешно отправлена!'
        ];
    }

    echo json_encode($data);

    return true;
}