<?php
/**
 * Settings page for AD Pro Forms
 *
 * @package ADProForms
 */

if (!defined('ABSPATH')) {
    exit;
}

class ADPF_Settings {

    private static $instance = null;

    /**
     * Get instance
     */
    public static function get_instance() {
        if (null === self::$instance) {
            self::$instance = new self();
        }
        return self::$instance;
    }

    /**
     * Constructor
     */
    private function __construct() {
        add_action('admin_menu', array($this, 'add_settings_page'), 10);
        add_action('admin_init', array($this, 'register_settings'));
    }

    /**
     * Add settings page
     */
    public function add_settings_page() {
        add_submenu_page(
            'ad-pro-forms-menu',
            __('Settings', 'ad-pro-forms'),
            __('Settings', 'ad-pro-forms'),
            'manage_options',
            'adpf-settings',
            array($this, 'render_settings_page')
        );
    }

    /**
     * Register settings
     */
    public function register_settings() {
        register_setting('adpf_settings', 'adpf_settings', array($this, 'sanitize_settings'));

        add_settings_section(
            'adpf_honeypot_section',
            __('Honeypot Protection', 'ad-pro-forms'),
            array($this, 'render_honeypot_section'),
            'adpf-settings'
        );

        add_settings_field(
            'adpf_honeypot_field_name',
            __('Honeypot Field Name', 'ad-pro-forms'),
            array($this, 'render_honeypot_field_name_field'),
            'adpf-settings',
            'adpf_honeypot_section'
        );

        add_settings_section(
            'adpf_messages_section',
            __('Form Messages', 'ad-pro-forms'),
            array($this, 'render_messages_section'),
            'adpf-settings'
        );

        add_settings_field(
            'adpf_success_message',
            __('Success Message', 'ad-pro-forms'),
            array($this, 'render_success_message_field'),
            'adpf-settings',
            'adpf_messages_section'
        );

        add_settings_field(
            'adpf_required_field_message',
            __('Required Field Error Message', 'ad-pro-forms'),
            array($this, 'render_required_field_message_field'),
            'adpf-settings',
            'adpf_messages_section'
        );

        add_settings_field(
            'adpf_submit_button_text',
            __('Submit Button Text', 'ad-pro-forms'),
            array($this, 'render_submit_button_text_field'),
            'adpf-settings',
            'adpf_messages_section'
        );
    }

    /**
     * Sanitize settings
     */
    public function sanitize_settings($input) {
        $sanitized = array();

        if (isset($input['honeypot_field_name'])) {
            $sanitized['honeypot_field_name'] = sanitize_text_field($input['honeypot_field_name']);
        }

        if (isset($input['success_message'])) {
            $sanitized['success_message'] = sanitize_textarea_field($input['success_message']);
        }

        if (isset($input['required_field_message'])) {
            $sanitized['required_field_message'] = sanitize_text_field($input['required_field_message']);
        }

        if (isset($input['submit_button_text'])) {
            $sanitized['submit_button_text'] = sanitize_text_field($input['submit_button_text']);
        }

        return $sanitized;
    }

    /**
     * Render settings page
     */
    public function render_settings_page() {
        if (!current_user_can('manage_options')) {
            return;
        }

        // phpcs:ignore WordPress.Security.NonceVerification.Recommended -- Just displaying a message from WordPress core
        if (isset($_GET['settings-updated']) && sanitize_text_field(wp_unslash($_GET['settings-updated'])) === 'true') {
            add_settings_error('adpf_settings', 'adpf_settings_saved', __('Settings saved successfully.', 'ad-pro-forms'), 'updated');
        }
        ?>
        <div class="wrap">
            <h1><?php echo esc_html(get_admin_page_title()); ?></h1>

            <?php settings_errors('adpf_settings'); ?>

            <form action="options.php" method="post">
                <?php
                settings_fields('adpf_settings');
                do_settings_sections('adpf-settings');
                submit_button();
                ?>
            </form>

            <div style="background: linear-gradient(135deg, #faf5ff 0%, #f3e8ff 100%); border: 1px solid #d8b4fe; border-radius: 4px; padding: 24px; margin-top: 30px;">
                <h3 style="margin-top: 0; color: #581c87;"><?php esc_html_e('Unlock More with the Pro Version', 'ad-pro-forms'); ?></h3>
                <p style="color: #6b21a8; margin-top: 0;">
                    <?php esc_html_e('The Pro version is a separate plugin that adds powerful features for professional sites and agencies:', 'ad-pro-forms'); ?>
                </p>
                <ul style="line-height: 2; margin: 0 0 20px; padding-left: 20px; color: #3b0764;">
                    <li><strong><?php esc_html_e('User Confirmation Emails:', 'ad-pro-forms'); ?></strong> <?php esc_html_e('Automatically send a professional confirmation to every person who submits a form.', 'ad-pro-forms'); ?></li>
                    <li><strong><?php esc_html_e('HTML Email Notifications:', 'ad-pro-forms'); ?></strong> <?php esc_html_e('Fully branded HTML emails with logo, custom colors, and dynamic placeholders. Includes a live preview and one-click test send.', 'ad-pro-forms'); ?></li>
                    <li><strong><?php esc_html_e('Per-form Recipients & Custom Templates:', 'ad-pro-forms'); ?></strong> <?php esc_html_e('Customise subject lines and message content. Route each form\'s notifications to a different inbox.', 'ad-pro-forms'); ?></li>
                    <li><strong><?php esc_html_e('Custom Redirect URL:', 'ad-pro-forms'); ?></strong> <?php esc_html_e('Send visitors to any thank-you page or funnel step after submission — essential for conversion tracking.', 'ad-pro-forms'); ?></li>
                    <li><strong><?php esc_html_e('CSV Export:', 'ad-pro-forms'); ?></strong> <?php esc_html_e('Download all entries as a clean, structured spreadsheet — ready for CRM, analysis, or client reports.', 'ad-pro-forms'); ?></li>
                    <li><strong><?php esc_html_e('Advanced Entry Management:', 'ad-pro-forms'); ?></strong> <?php esc_html_e('Filter entries by form or read/unread status. Bulk-mark as read or bulk-delete in one action.', 'ad-pro-forms'); ?></li>
                    <li><strong><?php esc_html_e('Global Styling Panel:', 'ad-pro-forms'); ?></strong> <?php esc_html_e('Full control over colors, typography, spacing, borders, and backdrop blur — applied across all forms at once.', 'ad-pro-forms'); ?></li>
                    <li><strong><?php esc_html_e('Cloudflare Turnstile:', 'ad-pro-forms'); ?></strong> <?php esc_html_e('Invisible, frictionless bot protection powered by Cloudflare — stops spam without annoying CAPTCHAs.', 'ad-pro-forms'); ?></li>
                    <li><strong><?php esc_html_e('Form Duplication:', 'ad-pro-forms'); ?></strong> <?php esc_html_e('Clone any form in one click — a massive time-saver for designers and agencies managing multiple projects.', 'ad-pro-forms'); ?></li>
                    <li><strong><?php esc_html_e('Field Reordering:', 'ad-pro-forms'); ?></strong> <?php esc_html_e('Move fields step-by-step with arrow controls — precise, visual, and confirmed with an animation on each move.', 'ad-pro-forms'); ?></li>
                    <li><strong><?php esc_html_e('White Label (Business):', 'ad-pro-forms'); ?></strong> <?php esc_html_e('Remove all plugin branding for seamless client site handoffs.', 'ad-pro-forms'); ?></li>
                </ul>
                <a href="<?php echo esc_url(adpf_get_upgrade_url()); ?>" class="button button-primary" target="_blank" rel="noopener noreferrer">
                    <?php esc_html_e('Discover Pro', 'ad-pro-forms'); ?>
                </a>
            </div>
        </div>
        <?php
        $this->render_footer();
    }

    /**
     * Render plugin footer branding
     */
    private function render_footer() {
        ?>
        <div class="adpf-footer-branding" style="margin-top: 40px; padding-top: 20px; border-top: 1px solid #dcdcde; text-align: center; color: #646970; font-size: 13px;">
            <?php echo esc_html__('AD Pro Forms plugin created by', 'ad-pro-forms'); ?>
            <a href="http://altaydagistan.com/" target="_blank" rel="noopener noreferrer" style="color: #2271b1; text-decoration: none;">Altay Dagistan</a> -
            <a href="http://altaydagistan.com/" target="_blank" rel="noopener noreferrer" style="color: #2271b1; text-decoration: none;">altaydagistan.com</a>
        </div>
        <?php
    }

    /**
     * Render honeypot section
     */
    public function render_honeypot_section() {
        echo '<p>' . esc_html__('Configure the honeypot field to catch spam bots. Every form automatically includes a hidden honeypot field.', 'ad-pro-forms') . '</p>';
    }

    /**
     * Render honeypot field name field
     */
    public function render_honeypot_field_name_field() {
        $settings = $this->get_settings();
        $field_name = isset($settings['honeypot_field_name']) ? $settings['honeypot_field_name'] : 'website_url';
        ?>
        <input type="text" name="adpf_settings[honeypot_field_name]" value="<?php echo esc_attr($field_name); ?>" class="regular-text" />
        <p class="description"><?php esc_html_e('Name of the hidden honeypot field. Bots that fill this field will be silently rejected.', 'ad-pro-forms'); ?></p>
        <?php
    }

    /**
     * Render messages section
     */
    public function render_messages_section() {
        echo '<p>' . esc_html__('Customize the messages displayed to users when they submit forms.', 'ad-pro-forms') . '</p>';
    }

    /**
     * Render success message field
     */
    public function render_success_message_field() {
        $settings = $this->get_settings();
        $message = isset($settings['success_message']) ? $settings['success_message'] : 'Thank you! Your message has been sent successfully. We will get back to you as soon as possible.';
        ?>
        <textarea name="adpf_settings[success_message]" rows="3" class="large-text"><?php echo esc_textarea($message); ?></textarea>
        <p class="description"><?php esc_html_e('Message displayed to users after successful form submission.', 'ad-pro-forms'); ?></p>
        <?php
    }

    /**
     * Render required field message field
     */
    public function render_required_field_message_field() {
        $settings = $this->get_settings();
        $message = isset($settings['required_field_message']) && !empty($settings['required_field_message'])
            ? $settings['required_field_message']
            : __('Please fill all the required fields.', 'ad-pro-forms');
        ?>
        <input type="text" name="adpf_settings[required_field_message]" value="<?php echo esc_attr($message); ?>" class="large-text" />
        <p class="description"><?php esc_html_e('Error message shown when a required field is left empty.', 'ad-pro-forms'); ?></p>
        <?php
    }

    /**
     * Render submit button text field
     */
    public function render_submit_button_text_field() {
        $settings = $this->get_settings();
        $button_text = isset($settings['submit_button_text']) && !empty($settings['submit_button_text'])
            ? $settings['submit_button_text']
            : __('Send', 'ad-pro-forms');
        ?>
        <input type="text" name="adpf_settings[submit_button_text]" value="<?php echo esc_attr($button_text); ?>" class="regular-text" />
        <p class="description"><?php esc_html_e('Text displayed on the submit button. The button is always displayed at the bottom of all forms.', 'ad-pro-forms'); ?></p>
        <?php
    }

    /**
     * Get default styling settings
     * Used as fallback values for form CSS variables.
     */
    public static function get_default_styling() {
        return array(
            'primary_color'              => '#2271b1',
            'primary_hover_color'        => '#135e96',
            'text_color'                 => '#333333',
            'label_color'                => '#333333',
            'border_color'               => '#dddddd',
            'border_focus_color'         => '#2271b1',
            'error_color'                => '#d63638',
            'success_color'              => '#00a32a',
            'background_color'           => '#ffffff',
            'button_text_color'          => '#ffffff',
            'field_background_color'     => '#ffffff',
            'field_background_transparent' => 0,
            'dropdown_option_color'      => '#333333',
            'font_family'                => 'inherit',
            'font_size'                  => '16',
            'label_font_size'            => '14',
            'label_font_weight'          => '600',
            'label_position'             => 'above',
            'explanation_font_size'      => '14',
            'field_gap'                  => '24',
            'field_padding'              => '12',
            'label_margin_bottom'        => '8',
            'container_padding'          => '0',
            'border_radius'              => '4',
            'border_width'               => '1',
            'container_border_radius'    => '0',
            'container_border_width'     => '0',
            'container_border_color'     => '#dddddd',
            'button_padding_top'         => '12',
            'button_padding_right'       => '24',
            'button_padding_bottom'      => '12',
            'button_padding_left'        => '24',
            'button_font_size'           => '16',
            'button_font_weight'         => '600',
            'button_border_radius'       => '4',
            'button_spinner_color'       => '#ffffff',
            'container_blur'             => '0',
        );
    }

    /**
     * Get settings
     *
     * @return array Settings array merged with defaults
     */
    public static function get_settings() {
        $defaults = array(
            'honeypot_field_name'    => 'website_url',
            'success_message'        => 'Thank you! Your message has been sent successfully. We will get back to you as soon as possible.',
            'required_field_message' => __('Please fill all the required fields.', 'ad-pro-forms'),
            'submit_button_text'     => __('Send', 'ad-pro-forms'),
        );

        $settings = get_option('adpf_settings', array());
        return wp_parse_args($settings, $defaults);
    }
}