<?php
/**
 * Plugin Name: Обратная связь
 */

/**
 * Шорткод для вывода формы обратной связи.
 * @return string
 */
function insert_feedback_form(){
    return getFeedbackForm();
}
add_shortcode('feedback', 'insert_feedback_form');

/**
 * Подключение стилей
 */
add_action( 'wp_enqueue_scripts', 'add_feedback_styles' );
function add_feedback_styles() {
    wp_register_style( 'feedback.css', plugin_dir_url( __FILE__ ) . 'css/feedback.css' );
    wp_enqueue_style( 'feedback.css');
}

/**
 * Инициализация типа документа
 */
add_action('init', 'create_feedback_post_type');
function create_feedback_post_type() {
    //создание типа сущности
    register_post_type( 'feedback',
        array(
            'labels' => array(
                'name' => __('Feedback'),
                'singular_name' => __('Feedback')
            ),
            'public' => true,
            'has_archive' => true,
            'supports' => ['custom-fields']
        )
    );
    $fields = array_keys(feedbackFormInputs());
    $meta_args = array(
        'type'         => 'string',
        'description'  => 'A meta key associated with a string meta value.',
        'single'       => true,
        'show_in_rest' => true,
    );
    foreach ($fields as $field_name) {
        register_post_meta('feedback', $field_name, $meta_args);
    }
}

function feedbackFormInputs() {
    return [
        'feedback_name' => 'Имя',
        'feedback_mail' => 'Адрес электронной почты',
        'feedback_phone' => 'Номер телефона',
        'feedback_type' => 'Способ получения сообщений',
        'feedback_message' => 'Сообщение'
    ];
}

/**
 * Сохранение обратной связи
 * @param $feedback_data
 * @return array
 */
function saveFeedback($feedback_data) {
    $response = [
        'message' => '',
        'status' => 'success'
    ];
    $fields = feedbackFormInputs();
    foreach ($fields as $field_code => $field_name) {
        if (empty($feedback_data[$field_code])) {
            $response['message'] = 'Поле "' . $field_name . '" обязательно для заполнения.';
            $response['status'] = 'error';
        }
    }
    if ($response['status'] == 'error') {
        return $response;
    }

    //сохранение сущности
    $meta_input = [];
    foreach (array_keys($fields) as $field_name) {
        if ($field_name == 'feedback_phone') {
            $feedback_data[$field_name] = preg_replace('/([^0-9])+/', '', $feedback_data[$field_name]);
        }
        elseif ($field_name == 'feedback_phone') {
            $feedback_data[$field_name] = preg_replace('/([^0-9])+/', '', $feedback_data[$field_name]);
        }
        $meta_input[$field_name] = $feedback_data[$field_name];
    }
    $post_data = [
        'post_title' => 'Запись от ' . date('Y.m.d H:i:s'),
        'post_type' => 'feedback',
        'meta_input' => $meta_input
    ];
    try {
        $post_id = wp_insert_post($post_data);
        if ((int) $post_id > 0) {
            $response['message'] = 'Ваше обращение успешно сохранено';
            $response['status'] = 'success';
        }
    } catch (\Exception $e) {
        $response['message'] = $e->getMessage();
        $response['status'] = 'error';
    }

    return $response;
}

function getFeedbackFormData() {
    return [
        'feedback_name' => '',
        'feedback_mail' => '',
        'feedback_phone' => '',
        'feedback_type' => [
            'mail_type' => '',
            'sms_type' => '',
            'whatsapp_type' => ''
        ],
        'feedback_message' => ''
    ];
}

/**
 * Форма обратной связи
 * @return string
 */
function getFeedbackForm() {
    $form = getFeedbackFormData();
    $fields = feedbackFormInputs();
    $notify = '';
    if (!empty($_POST)) {
        $form['feedback_name'] = sanitize_text_field($_POST['feedback_name']);
        $form['feedback_mail'] = sanitize_text_field($_POST['feedback_mail']);
        $form['feedback_phone'] = sanitize_text_field($_POST['feedback_phone']);
        $form_type = $_POST['feedback_type'];
        $feedback_types = [];
        foreach (['mail_type', 'sms_type', 'whatsapp_type'] as $type) {
            if (!empty($_POST['feedback_type'][$type])) {
                $feedback_types[] = substr($type, 0, -5);
            }
        }
        $form['feedback_type'] = implode(', ', $feedback_types);

        if (in_array($form_type, ['mail_type', 'sms_type', 'whatsapp_type'])) {
            $form['feedback_type'][$form_type] = ' selected="selected"';
        }
        $form['feedback_message'] = sanitize_textarea_field($_POST['feedback_message']);
        $saved = saveFeedback($form);
        $notify = '<div class="notify-feedback ' . $saved['status'] . '">' . $saved['message'] . '</div>';
        if ($saved['status'] == 'success') {
            // обнуление полей в форме
            $form = getFeedbackFormData();
        }
    }
    $form_html = $notify . '<form method="post" action="">
    <input type="text" name="feedback_name" placeholder="' . $fields['feedback_name'] . '" value="' . $form['feedback_name'] . '"/>
    <input type="email" name="feedback_mail" placeholder="' . $fields['feedback_mail'] . '" value="' . $form['feedback_mail'] . '" />
    <input type="tel" name="feedback_phone" placeholder="' . $fields['feedback_phone'] . '" value="' . $form['feedback_phone'] . '" />
    <input type="checkbox" name="feedback_type[mail_type]"' . ((!empty($_POST['feedback_type']['mail_type'])) ? ' checked="checked" ' : '') . 'value="1" id="feedback_mail_type"><label for="feedback_mail_type">Почта</label>
    <input type="checkbox" name="feedback_type[sms_type]"' . ((!empty($_POST['feedback_type']['sms_type'])) ? ' checked="checked" ' : '') . 'value="1" id="feedback_sms_type"><label for="feedback_sms_type">SMS</label>
    <input type="checkbox" name="feedback_type[whatsapp_type]"' . ((!empty($_POST['feedback_type']['whatsapp_type'])) ? ' checked="checked" ' : '') . 'value="1" id="feedback_whatsapp_type"><label for="feedback_whatsapp_type">WhatsApp</label>
    <textarea name="feedback_message" placeholder="' . $fields['feedback_message'] . '">' . $form['feedback_message'] . '</textarea>
    <input type="submit" value="Отправить" />
</form>';

    return $form_html;
}