<?php
/**
 * Statement nudge — a persistent admin notice that points connected sites
 * at the Accessibility Statement page builder until the page is published
 * and linked, or the admin says "Not now".
 *
 * Replaces the 7-day reminder that used to live in DashboardBanner: that
 * gate hid the feature from exactly the people upgrading into it. Shows on
 * AllAccessible screens and the WordPress Dashboard home only.
 *
 * @package AllAccessible
 * @since   2.2.1
 */
if (!defined('ABSPATH')) { exit; }

class AllAccessible_StatementNudge {
    const OPTION        = 'aacb_statement_nudge';
    const LEGACY_OPTION = 'aacb_statement_notice_dismissed'; // pre-2.2.1 reminder dismissal, still honored
    const AJAX_ACTION   = 'aacb_statement_nudge_action';

    public static function register() {
        add_action('admin_notices', array(__CLASS__, 'maybe_render'));
        add_action('wp_ajax_' . self::AJAX_ACTION, array(__CLASS__, 'ajax_handle'));
    }

    /**
     * Pure visibility rule. Everything the decision needs comes in $ctx so
     * it can be unit-tested without WordPress.
     *
     * @param array $ctx can_manage(bool), screen_id(string), has_account(bool),
     *                   status(array from StatementPage::status()), dismissed(bool)
     */
    public static function evaluate(array $ctx) {
        if (empty($ctx['can_manage'])) return false;
        $screen = isset($ctx['screen_id']) ? (string) $ctx['screen_id'] : '';
        if (strpos($screen, 'allaccessible') === false && $screen !== 'dashboard') return false;
        if (empty($ctx['has_account'])) return false;
        if (!empty($ctx['dismissed'])) return false;
        $st = isset($ctx['status']) && is_array($ctx['status']) ? $ctx['status'] : array();
        if (!empty($st['published']) && !empty($st['registered'])) return false;
        return true;
    }

    public static function should_show() {
        if (!current_user_can('manage_options')) return false;
        // Screen gate before any option reads, same reasoning as ReviewNudge.
        $screen = function_exists('get_current_screen') ? get_current_screen() : null;
        $id = $screen ? (string) $screen->id : '';
        if (strpos($id, 'allaccessible') === false && $id !== 'dashboard') return false;
        if (!class_exists('AllAccessible_StatementPage')) return false;

        $state = get_option(self::OPTION, array());
        return self::evaluate(array(
            'can_manage'  => true,
            'screen_id'   => $id,
            'has_account' => (bool) get_option('aacb_accountID'),
            'dismissed'   => !empty($state['dismissed_at']) || (bool) get_option(self::LEGACY_OPTION),
            'status'      => AllAccessible_StatementPage::status(),
        ));
    }

    private static function on_plugin_screen() {
        $screen = function_exists('get_current_screen') ? get_current_screen() : null;
        return $screen && strpos((string) $screen->id, 'allaccessible') !== false;
    }

    /**
     * admin_notices path: WordPress Dashboard home only. Plugin screens hide
     * every core notice (SettingsPage inline CSS), so there the Overview
     * calls render_inline() instead.
     */
    public static function maybe_render() {
        if (self::on_plugin_screen() || !self::should_show()) return;
        self::render(false);
    }

    /** Overview callout, printed by SettingsPage right under the page header. */
    public static function render_inline() {
        if (!self::should_show()) return;
        self::render(true);
    }

    private static function render($inline) {
        $url   = admin_url('admin.php?page=allaccessible#aacb-statement-card');
        $nonce = wp_create_nonce(self::AJAX_ACTION);
        $ajax  = admin_url('admin-ajax.php');
        $title = __('New in 2.2: your accessibility statement page.', 'allaccessible');
        $body  = __('We draft it from your AllAccessible statement, you publish it, and the accessibility menu links visitors to it.', 'allaccessible');
        if ($inline) : ?>
        <div class="aacx-v2__card aacb-statement-nudge aacb-statement-nudge--inline" role="region" aria-label="<?php echo esc_attr($title); ?>"
             data-nonce="<?php echo esc_attr($nonce); ?>" data-ajax="<?php echo esc_url($ajax); ?>">
            <div class="aacb-statement-nudge__text">
                <div class="aacb-statement-nudge__eyebrow">✦ <?php esc_html_e('New in 2.2', 'allaccessible'); ?></div>
                <strong><?php esc_html_e('Your accessibility statement page', 'allaccessible'); ?></strong>
                <p><?php echo esc_html($body); ?></p>
            </div>
            <div class="aacb-statement-nudge__actions">
                <a href="<?php echo esc_url($url); ?>" class="aacx-v2__btn aacx-v2__btn--primary aacb-statement-nudge__cta"><?php esc_html_e('Create my statement page', 'allaccessible'); ?> →</a>
                <button type="button" class="aacx-v2__btn aacx-v2__btn--ghost aacb-statement-nudge__later"><?php esc_html_e('Not now', 'allaccessible'); ?></button>
            </div>
        </div>
        <?php else : ?>
        <div class="notice notice-info is-dismissible aacb-statement-nudge"
             data-nonce="<?php echo esc_attr($nonce); ?>" data-ajax="<?php echo esc_url($ajax); ?>" style="border-left-color:#7c3aed;">
            <p style="font-size:14px;line-height:1.6;margin:0.5em 0;">
                <strong><?php echo esc_html($title); ?></strong>
                <?php echo esc_html($body); ?>
            </p>
            <p style="margin:0.5em 0 1em;">
                <a href="<?php echo esc_url($url); ?>" class="button button-primary aacb-statement-nudge__cta"><?php esc_html_e('Create my statement page', 'allaccessible'); ?></a>
                <button type="button" class="button-link aacb-statement-nudge__later" style="margin-left:10px;color:#646970;"><?php esc_html_e('Not now', 'allaccessible'); ?></button>
            </p>
        </div>
        <?php endif; ?>
        <script>
        (function () {
            var box = document.querySelector('.aacb-statement-nudge');
            if (!box) return;
            var sent = false;
            function dismiss() {
                if (sent) return; sent = true;
                var fd = new FormData();
                fd.append('action', '<?php echo esc_js(self::AJAX_ACTION); ?>');
                fd.append('_ajax_nonce', box.getAttribute('data-nonce'));
                fd.append('nudge_act', 'dismiss');
                fetch(box.getAttribute('data-ajax'), { method: 'POST', credentials: 'same-origin', keepalive: true, body: fd });
            }
            box.addEventListener('click', function (e) {
                if (e.target.closest('.aacb-statement-nudge__later')) { dismiss(); box.remove(); }
                else if (e.target.closest('.notice-dismiss')) { dismiss(); }
            });
        })();
        </script>
        <?php
    }

    public static function ajax_handle() {
        if (!current_user_can('manage_options')) {
            wp_send_json_error(array('message' => 'forbidden'), 403);
        }
        check_ajax_referer(self::AJAX_ACTION);
        $act = isset($_POST['nudge_act']) ? sanitize_key($_POST['nudge_act']) : '';
        if ($act !== 'dismiss') {
            wp_send_json_error(array('message' => 'unknown action'), 400);
        }
        update_option(self::OPTION, array('dismissed_at' => time()), false);
        wp_send_json_success(array('act' => $act));
    }
}