<?php
/**
 * Native WP admin menus for payment / order ops (zibll zibpay-style).
 *
 * Config stays in the AKSRT SPA; this shell owns operational list pages.
 *
 * @package AKSRT
 */

defined('ABSPATH') || exit;

class AKSRT_Admin_Pay_Menus {

    public const CAPABILITY = 'manage_options';
    public const MENU_SLUG  = 'aksrt_pay';

    private static $instance = null;

    public static function get_instance(): self {
        if (null === self::$instance) {
            self::$instance = new self();
        }
        return self::$instance;
    }

    public function init(): void {
        if (!is_admin()) {
            return;
        }

        add_action('admin_menu', [$this, 'register_menus']);
        add_action('admin_notices', [$this, 'pending_notices']);
        add_action('admin_post_aksrt_pay_update_order_status', [$this, 'handle_update_order_status']);
        add_action('admin_post_aksrt_pay_update_withdrawal', [$this, 'handle_update_withdrawal']);
        add_action('admin_post_aksrt_pay_disable_charge_card', [$this, 'handle_disable_charge_card']);
        add_action('admin_post_aksrt_pay_batch_charge_cards', [$this, 'handle_batch_charge_cards']);
        add_action('admin_post_aksrt_pay_update_shipping', [$this, 'handle_update_shipping']);
        add_action('admin_post_aksrt_pay_update_after_sale', [$this, 'handle_update_after_sale']);
        add_action('admin_post_aksrt_pay_create_coupon', [$this, 'handle_create_coupon']);
        add_action('admin_post_aksrt_pay_disable_coupon', [$this, 'handle_disable_coupon']);
        add_action('admin_post_aksrt_pay_settle_income', [$this, 'handle_settle_income']);
        add_action('admin_post_aksrt_pay_settle_rebate', [$this, 'handle_settle_rebate']);
        add_action('admin_post_aksrt_pay_cancel_rebate', [$this, 'handle_cancel_rebate']);
    }

    /**
     * @return array<string, array{slug:string,title:string,callback:callable}>
     */
    private function pages(): array {
        return [
            'overview' => [
                'slug'     => self::MENU_SLUG,
                'title'    => __('概览', 'aksrt'),
                'callback' => [$this, 'render_overview_page'],
            ],
            'orders' => [
                'slug'     => 'aksrt_orders',
                'title'    => __('订单', 'aksrt'),
                'callback' => [$this, 'render_orders_page'],
            ],
            'shipping' => [
                'slug'     => 'aksrt_shipping',
                'title'    => __('发货及物流', 'aksrt'),
                'callback' => [$this, 'render_shipping_page'],
            ],
            'after_sale' => [
                'slug'     => 'aksrt_after_sale',
                'title'    => __('售后管理', 'aksrt'),
                'callback' => [$this, 'render_after_sale_page'],
            ],
            'coupons' => [
                'slug'     => 'aksrt_coupons',
                'title'    => __('优惠码', 'aksrt'),
                'callback' => [$this, 'render_coupons_page'],
            ],
            'charge_cards' => [
                'slug'     => 'aksrt_charge_cards',
                'title'    => __('卡密管理', 'aksrt'),
                'callback' => [$this, 'render_charge_cards_page'],
            ],
            'income' => [
                'slug'     => 'aksrt_income',
                'title'    => __('创作分成', 'aksrt'),
                'callback' => [$this, 'render_income_page'],
            ],
            'rebate' => [
                'slug'     => 'aksrt_rebate',
                'title'    => __('推广返佣', 'aksrt'),
                'callback' => [$this, 'render_rebate_page'],
            ],
            'withdraw' => [
                'slug'     => 'aksrt_withdraw',
                'title'    => __('提现审核', 'aksrt'),
                'callback' => [$this, 'render_withdrawals_page'],
            ],
        ];
    }

    public function register_menus(): void {
        if (!current_user_can(self::CAPABILITY)) {
            return;
        }

        add_menu_page(
            __('支付中心', 'aksrt'),
            __('支付中心', 'aksrt'),
            self::CAPABILITY,
            self::MENU_SLUG,
            [$this, 'render_overview_page'],
            'dashicons-cart',
            36
        );

        foreach ($this->pages() as $key => $page) {
            $parent = self::MENU_SLUG;
            // First item reuses top-level slug (WP pattern).
            add_submenu_page(
                $parent,
                $page['title'],
                $page['title'],
                self::CAPABILITY,
                $page['slug'],
                $page['callback']
            );
        }
    }

    public function pending_notices(): void {
        if (!current_user_can(self::CAPABILITY)) {
            return;
        }

        $page = isset($_GET['page']) ? sanitize_key((string) wp_unslash($_GET['page'])) : '';

        if ($page !== 'aksrt_withdraw' && class_exists('AKSRT_Withdrawal')) {
            $pending = (int) AKSRT_Withdrawal::get_instance()->get_count(['status' => AKSRT_Withdrawal::STATUS_PENDING]);
            if ($pending > 0) {
                $url = admin_url('admin.php?page=aksrt_withdraw&status=pending');
                echo '<div class="notice notice-info is-dismissible">';
                echo '<h3>' . esc_html__('提现申请待处理', 'aksrt') . '</h3>';
                echo '<p>' . esc_html(sprintf(
                    /* translators: %d: pending withdrawal count */
                    __('您有 %d 个提现申请待处理', 'aksrt'),
                    $pending
                )) . '</p>';
                echo '<p><a class="button button-primary" href="' . esc_url($url) . '">' . esc_html__('立即处理', 'aksrt') . '</a></p>';
                echo '</div>';
            }
        }

        if ($page !== 'aksrt_after_sale' && class_exists('AKSRT_After_Sale')) {
            $as_stats = AKSRT_After_Sale::get_instance()->get_stats();
            $pending_as = (int) ($as_stats['pending'] ?? 0);
            if ($pending_as > 0) {
                $url = admin_url('admin.php?page=aksrt_after_sale&status=pending');
                echo '<div class="notice notice-info is-dismissible">';
                echo '<h3>' . esc_html__('售后工单待处理', 'aksrt') . '</h3>';
                echo '<p>' . esc_html(sprintf(
                    /* translators: %d: pending after-sale count */
                    __('您有 %d 个售后工单待处理', 'aksrt'),
                    $pending_as
                )) . '</p>';
                echo '<p><a class="button button-primary" href="' . esc_url($url) . '">' . esc_html__('去处理', 'aksrt') . '</a></p>';
                echo '</div>';
            }
        }
    }

    /* ------------------------------------------------------------------
     * Page shells
     * ----------------------------------------------------------------*/

    private function ensure_cap(): void {
        if (!current_user_can(self::CAPABILITY)) {
            wp_die(esc_html__('您没有权限访问此页面。', 'aksrt'));
        }
    }

    private function render_header(string $title): void {
        echo '<div class="wrap">';
        echo '<h1>' . esc_html($title) . '</h1>';
        $this->render_flash();
    }

    private function render_footer(): void {
        echo '</div>';
    }

    private function render_flash(): void {
        if (empty($_GET['aksrt_pay_msg'])) {
            return;
        }
        $code = sanitize_key((string) wp_unslash($_GET['aksrt_pay_msg']));
        $map  = [
            'order_updated'       => __('订单状态已更新。', 'aksrt'),
            'order_failed'        => __('订单状态更新失败。', 'aksrt'),
            'withdraw_updated'    => __('提现状态已更新。', 'aksrt'),
            'withdraw_failed'     => __('提现状态更新失败。', 'aksrt'),
            'card_disabled'       => __('充值卡已禁用。', 'aksrt'),
            'card_failed'         => __('充值卡禁用失败。', 'aksrt'),
            'card_batch_ok'       => __('卡密批量生成完成。', 'aksrt'),
            'card_batch_failed'   => __('卡密批量生成失败。', 'aksrt'),
            'shipping_updated'    => __('物流状态已更新。', 'aksrt'),
            'shipping_failed'     => __('物流状态更新失败。', 'aksrt'),
            'after_sale_updated'  => __('售后状态已更新。', 'aksrt'),
            'after_sale_failed'   => __('售后状态更新失败。', 'aksrt'),
            'coupon_created'      => __('优惠码已创建。', 'aksrt'),
            'coupon_create_failed'=> __('优惠码创建失败（可能重复）。', 'aksrt'),
            'coupon_disabled'     => __('优惠码已禁用。', 'aksrt'),
            'coupon_failed'       => __('优惠码禁用失败。', 'aksrt'),
            'income_settled'      => __('分成已结算。', 'aksrt'),
            'income_failed'       => __('分成结算失败。', 'aksrt'),
            'rebate_settled'      => __('返佣已结算。', 'aksrt'),
            'rebate_cancelled'    => __('返佣已取消。', 'aksrt'),
            'rebate_failed'       => __('返佣操作失败。', 'aksrt'),
        ];
        if (!isset($map[$code])) {
            return;
        }
        $class = str_contains($code, 'failed') ? 'notice-error' : 'notice-success';
        echo '<div class="notice ' . esc_attr($class) . ' is-dismissible"><p>' . esc_html($map[$code]) . '</p></div>';
    }

    private function page_url(string $slug, array $args = []): string {
        return add_query_arg(array_merge(['page' => $slug], $args), admin_url('admin.php'));
    }

    public function render_overview_page(): void {
        $this->ensure_cap();
        $this->render_header(__('支付中心', 'aksrt'));

        $order_stats = class_exists('AKSRT_Order_Repository')
            ? AKSRT_Order_Repository::get_instance()->get_stats()
            : [];
        $withdraw_stats = class_exists('AKSRT_Withdrawal')
            ? AKSRT_Withdrawal::get_instance()->get_stats()
            : [];
        $card_stats = class_exists('AKSRT_Charge_Card')
            ? AKSRT_Charge_Card::get_instance()->get_stats()
            : [];

        echo '<p class="description">' . esc_html__('运营数据入口（对齐 zibll 商城中心）。配置项仍在 AKSRT 主题设置 SPA。', 'aksrt') . '</p>';

        echo '<div class="aksrt-pay-stats" style="display:flex;flex-wrap:wrap;gap:16px;margin:20px 0;">';
        $this->stat_card(__('订单总数', 'aksrt'), (string) (int) ($order_stats['total'] ?? 0), $this->page_url('aksrt_orders'));
        $this->stat_card(__('待支付', 'aksrt'), (string) (int) ($order_stats['pending'] ?? 0), $this->page_url('aksrt_orders', ['status' => 'pending']));
        $this->stat_card(__('已支付', 'aksrt'), (string) (int) ($order_stats['paid'] ?? 0), $this->page_url('aksrt_orders', ['status' => 'paid']));
        $this->stat_card(__('营收', 'aksrt'), number_format((float) ($order_stats['revenue'] ?? 0), 2), $this->page_url('aksrt_orders'));
        $this->stat_card(__('待审提现', 'aksrt'), (string) (int) ($withdraw_stats['pending'] ?? 0), $this->page_url('aksrt_withdraw', ['status' => 'pending']));
        $this->stat_card(__('可用卡密', 'aksrt'), (string) (int) ($card_stats['active'] ?? 0), $this->page_url('aksrt_charge_cards', ['status' => 'active']));
        echo '</div>';

        echo '<h2>' . esc_html__('快捷入口', 'aksrt') . '</h2><ul>';
        foreach ($this->pages() as $page) {
            if ($page['slug'] === self::MENU_SLUG) {
                continue;
            }
            echo '<li><a href="' . esc_url($this->page_url($page['slug'])) . '">' . esc_html($page['title']) . '</a></li>';
        }
        echo '</ul>';

        $spa = admin_url('admin.php?page=aksrt-settings#/payment/gateway');
        echo '<p><a class="button" href="' . esc_url($spa) . '">' . esc_html__('打开支付配置（SPA）', 'aksrt') . '</a></p>';

        $this->render_footer();
    }

    private function stat_card(string $label, string $value, string $url): void {
        echo '<a href="' . esc_url($url) . '" style="display:block;min-width:140px;padding:16px;background:#fff;border:1px solid #c3c4c7;border-radius:4px;text-decoration:none;color:inherit;">';
        echo '<div style="font-size:12px;color:#646970;">' . esc_html($label) . '</div>';
        echo '<div style="font-size:22px;font-weight:600;margin-top:6px;">' . esc_html($value) . '</div>';
        echo '</a>';
    }

    /* ------------------------------------------------------------------
     * Orders
     * ----------------------------------------------------------------*/

    public function render_orders_page(): void {
        $this->ensure_cap();
        $this->render_header(__('订单', 'aksrt'));

        if (!class_exists('AKSRT_Order_Repository')) {
            echo '<div class="notice notice-error"><p>' . esc_html__('订单服务不可用。', 'aksrt') . '</p></div>';
            $this->render_footer();
            return;
        }

        $status   = isset($_GET['status']) ? sanitize_key((string) wp_unslash($_GET['status'])) : '';
        $search   = isset($_GET['s']) ? sanitize_text_field((string) wp_unslash($_GET['s'])) : '';
        $page_num = max(1, (int) ($_GET['paged'] ?? 1));
        $per_page = 20;

        $repo   = AKSRT_Order_Repository::get_instance();
        $args   = [
            'limit'  => $per_page,
            'offset' => ($page_num - 1) * $per_page,
        ];
        if ($status !== '' && $status !== 'all') {
            $args['status'] = $status;
        }

        $items = $repo->get_orders_admin($args, $search);
        $total = $repo->get_orders_count($args, $search);
        $pages = max(1, (int) ceil($total / $per_page));
        $labels = class_exists('AKSRT_Domain_Model')
            ? AKSRT_Domain_Model::order_status_labels()
            : [];

        echo '<form method="get" style="margin:12px 0;">';
        echo '<input type="hidden" name="page" value="aksrt_orders" />';
        echo '<select name="status">';
        echo '<option value="">' . esc_html__('全部状态', 'aksrt') . '</option>';
        foreach ($labels as $key => $label) {
            printf(
                '<option value="%s"%s>%s</option>',
                esc_attr($key),
                selected($status, $key, false),
                esc_html($label)
            );
        }
        echo '</select> ';
        echo '<input type="search" name="s" value="' . esc_attr($search) . '" placeholder="' . esc_attr__('订单号 / 类型', 'aksrt') . '" /> ';
        submit_button(__('筛选', 'aksrt'), 'secondary', '', false);
        echo '</form>';

        echo '<table class="wp-list-table widefat fixed striped">';
        echo '<thead><tr>';
        echo '<th>' . esc_html__('订单号', 'aksrt') . '</th>';
        echo '<th>' . esc_html__('用户', 'aksrt') . '</th>';
        echo '<th>' . esc_html__('类型', 'aksrt') . '</th>';
        echo '<th>' . esc_html__('金额', 'aksrt') . '</th>';
        echo '<th>' . esc_html__('状态', 'aksrt') . '</th>';
        echo '<th>' . esc_html__('时间', 'aksrt') . '</th>';
        echo '<th>' . esc_html__('操作', 'aksrt') . '</th>';
        echo '</tr></thead><tbody>';

        if (!$items) {
            echo '<tr><td colspan="7">' . esc_html__('暂无订单', 'aksrt') . '</td></tr>';
        }

        foreach ($items as $row) {
            $order_number = (string) ($row['order_number'] ?? '');
            $user_id      = (int) ($row['user_id'] ?? 0);
            $user         = $user_id > 0 ? get_userdata($user_id) : null;
            $status_key   = (string) ($row['status'] ?? '');
            $status_label = $labels[$status_key] ?? $status_key;

            echo '<tr>';
            echo '<td><code>' . esc_html($order_number) . '</code></td>';
            echo '<td>' . ($user ? esc_html($user->display_name . ' (#' . $user_id . ')') : esc_html((string) $user_id)) . '</td>';
            echo '<td>' . esc_html((string) ($row['product_type'] ?? '')) . '</td>';
            echo '<td>' . esc_html(number_format((float) ($row['amount'] ?? 0), 2)) . ' ' . esc_html((string) ($row['currency'] ?? '')) . '</td>';
            echo '<td>' . esc_html($status_label) . '</td>';
            echo '<td>' . esc_html((string) ($row['created_at'] ?? '')) . '</td>';
            echo '<td>';
            echo '<form method="post" action="' . esc_url(admin_url('admin-post.php')) . '" style="display:flex;gap:4px;align-items:center;">';
            echo '<input type="hidden" name="action" value="aksrt_pay_update_order_status" />';
            echo '<input type="hidden" name="order_number" value="' . esc_attr($order_number) . '" />';
            wp_nonce_field('aksrt_pay_update_order_status_' . $order_number);
            echo '<select name="new_status">';
            foreach ($labels as $key => $label) {
                printf(
                    '<option value="%s"%s>%s</option>',
                    esc_attr($key),
                    selected($status_key, $key, false),
                    esc_html($label)
                );
            }
            echo '</select>';
            submit_button(__('更新', 'aksrt'), 'small', '', false);
            echo '</form>';
            echo '</td>';
            echo '</tr>';
        }

        echo '</tbody></table>';

        if ($pages > 1) {
            echo '<div class="tablenav"><div class="tablenav-pages">';
            echo paginate_links([
                'base'      => add_query_arg('paged', '%#%'),
                'format'    => '',
                'prev_text' => '&laquo;',
                'next_text' => '&raquo;',
                'total'     => $pages,
                'current'   => $page_num,
            ]);
            echo '</div></div>';
        }

        $this->render_footer();
    }

    public function handle_update_order_status(): void {
        if (!current_user_can(self::CAPABILITY)) {
            wp_die(esc_html__('权限不足', 'aksrt'));
        }

        $order_number = isset($_POST['order_number']) ? sanitize_text_field((string) wp_unslash($_POST['order_number'])) : '';
        $new_status   = isset($_POST['new_status']) ? sanitize_key((string) wp_unslash($_POST['new_status'])) : '';
        check_admin_referer('aksrt_pay_update_order_status_' . $order_number);

        $ok = false;
        if ($order_number !== '' && $new_status !== '' && class_exists('AKSRT_Order_Repository')) {
            $ok = AKSRT_Order_Repository::get_instance()->update_status($order_number, $new_status, ['force' => true]);
        }

        wp_safe_redirect($this->page_url('aksrt_orders', [
            'aksrt_pay_msg' => $ok ? 'order_updated' : 'order_failed',
        ]));
        exit;
    }

    /* ------------------------------------------------------------------
     * Withdrawals
     * ----------------------------------------------------------------*/

    public function render_withdrawals_page(): void {
        $this->ensure_cap();
        $this->render_header(__('提现审核', 'aksrt'));

        if (!class_exists('AKSRT_Withdrawal')) {
            echo '<div class="notice notice-error"><p>' . esc_html__('提现模块未初始化。', 'aksrt') . '</p></div>';
            $this->render_footer();
            return;
        }

        $status   = isset($_GET['status']) ? sanitize_key((string) wp_unslash($_GET['status'])) : '';
        $page_num = max(1, (int) ($_GET['paged'] ?? 1));
        $per_page = 20;
        $svc      = AKSRT_Withdrawal::get_instance();
        $stats    = $svc->get_stats();

        echo '<p>' . esc_html(sprintf(
            /* translators: 1: total 2: pending 3: completed 4: paid */
            __('共 %1$d 条 · 待处理 %2$d · 已完成 %3$d · 已打款 %4$s', 'aksrt'),
            (int) ($stats['total'] ?? 0),
            (int) ($stats['pending'] ?? 0),
            (int) ($stats['completed'] ?? 0),
            number_format((float) ($stats['total_paid'] ?? 0), 2)
        )) . '</p>';

        echo '<form method="get" style="margin:12px 0;">';
        echo '<input type="hidden" name="page" value="aksrt_withdraw" />';
        echo '<select name="status">';
        $status_options = [
            ''           => __('全部状态', 'aksrt'),
            'pending'    => __('待处理', 'aksrt'),
            'approved'   => __('已通过', 'aksrt'),
            'processing' => __('处理中', 'aksrt'),
            'completed'  => __('已完成', 'aksrt'),
            'rejected'   => __('已拒绝', 'aksrt'),
        ];
        foreach ($status_options as $key => $label) {
            printf(
                '<option value="%s"%s>%s</option>',
                esc_attr($key),
                selected($status, $key, false),
                esc_html($label)
            );
        }
        echo '</select> ';
        submit_button(__('筛选', 'aksrt'), 'secondary', '', false);
        echo '</form>';

        $items = $svc->get_all([
            'status' => $status,
            'limit'  => $per_page,
            'offset' => ($page_num - 1) * $per_page,
        ]);
        $total = $svc->get_count(['status' => $status]);
        $pages = max(1, (int) ceil($total / $per_page));

        echo '<table class="wp-list-table widefat fixed striped">';
        echo '<thead><tr>';
        echo '<th>ID</th>';
        echo '<th>' . esc_html__('用户', 'aksrt') . '</th>';
        echo '<th>' . esc_html__('金额', 'aksrt') . '</th>';
        echo '<th>' . esc_html__('方式', 'aksrt') . '</th>';
        echo '<th>' . esc_html__('账户', 'aksrt') . '</th>';
        echo '<th>' . esc_html__('状态', 'aksrt') . '</th>';
        echo '<th>' . esc_html__('申请时间', 'aksrt') . '</th>';
        echo '<th>' . esc_html__('操作', 'aksrt') . '</th>';
        echo '</tr></thead><tbody>';

        if (!$items) {
            echo '<tr><td colspan="8">' . esc_html__('暂无提现记录', 'aksrt') . '</td></tr>';
        }

        foreach ($items as $row) {
            $id      = (int) ($row['id'] ?? 0);
            $user_id = (int) ($row['user_id'] ?? 0);
            $user    = $user_id > 0 ? get_userdata($user_id) : null;
            $st      = (string) ($row['status'] ?? '');

            echo '<tr>';
            echo '<td>' . esc_html((string) $id) . '</td>';
            echo '<td>' . ($user ? esc_html($user->display_name . ' (#' . $user_id . ')') : esc_html((string) $user_id)) . '</td>';
            echo '<td>' . esc_html(number_format((float) ($row['amount'] ?? 0), 2)) . '</td>';
            echo '<td>' . esc_html((string) ($row['method'] ?? '')) . '</td>';
            echo '<td>' . esc_html((string) ($row['account_info'] ?? '')) . '</td>';
            echo '<td>' . esc_html($status_options[$st] ?? $st) . '</td>';
            echo '<td>' . esc_html((string) ($row['created_at'] ?? '')) . '</td>';
            echo '<td>';
            echo '<form method="post" action="' . esc_url(admin_url('admin-post.php')) . '" style="display:flex;gap:4px;flex-wrap:wrap;align-items:center;">';
            echo '<input type="hidden" name="action" value="aksrt_pay_update_withdrawal" />';
            echo '<input type="hidden" name="withdrawal_id" value="' . esc_attr((string) $id) . '" />';
            wp_nonce_field('aksrt_pay_update_withdrawal_' . $id);
            echo '<select name="new_status">';
            foreach ($status_options as $key => $label) {
                if ($key === '') {
                    continue;
                }
                printf(
                    '<option value="%s"%s>%s</option>',
                    esc_attr($key),
                    selected($st, $key, false),
                    esc_html($label)
                );
            }
            echo '</select>';
            echo '<input type="text" name="note" placeholder="' . esc_attr__('备注', 'aksrt') . '" value="" />';
            submit_button(__('更新', 'aksrt'), 'small', '', false);
            echo '</form>';
            echo '</td>';
            echo '</tr>';
        }

        echo '</tbody></table>';

        if ($pages > 1) {
            echo '<div class="tablenav"><div class="tablenav-pages">';
            echo paginate_links([
                'base'      => add_query_arg('paged', '%#%'),
                'format'    => '',
                'prev_text' => '&laquo;',
                'next_text' => '&raquo;',
                'total'     => $pages,
                'current'   => $page_num,
            ]);
            echo '</div></div>';
        }

        $this->render_footer();
    }

    public function handle_update_withdrawal(): void {
        if (!current_user_can(self::CAPABILITY)) {
            wp_die(esc_html__('权限不足', 'aksrt'));
        }

        $id         = isset($_POST['withdrawal_id']) ? (int) $_POST['withdrawal_id'] : 0;
        $new_status = isset($_POST['new_status']) ? sanitize_key((string) wp_unslash($_POST['new_status'])) : '';
        $note       = isset($_POST['note']) ? sanitize_textarea_field((string) wp_unslash($_POST['note'])) : '';
        check_admin_referer('aksrt_pay_update_withdrawal_' . $id);

        $ok = false;
        if ($id > 0 && $new_status !== '' && class_exists('AKSRT_Withdrawal')) {
            $ok = AKSRT_Withdrawal::get_instance()->update_status($id, $new_status, $note);
        }

        wp_safe_redirect($this->page_url('aksrt_withdraw', [
            'aksrt_pay_msg' => $ok ? 'withdraw_updated' : 'withdraw_failed',
        ]));
        exit;
    }

    /* ------------------------------------------------------------------
     * Charge cards
     * ----------------------------------------------------------------*/

    public function render_charge_cards_page(): void {
        $this->ensure_cap();
        $this->render_header(__('卡密管理', 'aksrt'));

        if (!class_exists('AKSRT_Charge_Card')) {
            echo '<div class="notice notice-error"><p>' . esc_html__('卡密模块未初始化。', 'aksrt') . '</p></div>';
            $this->render_footer();
            return;
        }

        $status   = isset($_GET['status']) ? sanitize_key((string) wp_unslash($_GET['status'])) : '';
        $type     = isset($_GET['type']) ? sanitize_key((string) wp_unslash($_GET['type'])) : '';
        $page_num = max(1, (int) ($_GET['paged'] ?? 1));
        $per_page = 20;
        $svc      = AKSRT_Charge_Card::get_instance();
        $stats    = $svc->get_stats();

        echo '<p>' . esc_html(sprintf(
            /* translators: 1: total 2: active 3: used */
            __('共 %1$d 张 · 可用 %2$d · 已用 %3$d', 'aksrt'),
            (int) ($stats['total'] ?? 0),
            (int) ($stats['active'] ?? 0),
            (int) ($stats['used'] ?? 0)
        )) . '</p>';

        echo '<h2>' . esc_html__('批量生成卡密', 'aksrt') . '</h2>';
        echo '<form method="post" action="' . esc_url(admin_url('admin-post.php')) . '" style="margin:12px 0 20px;display:flex;flex-wrap:wrap;gap:8px;align-items:end;">';
        echo '<input type="hidden" name="action" value="aksrt_pay_batch_charge_cards" />';
        wp_nonce_field('aksrt_pay_batch_charge_cards');
        echo '<p><label>' . esc_html__('类型', 'aksrt') . '<br><select name="type">';
        echo '<option value="balance">' . esc_html__('余额', 'aksrt') . '</option>';
        echo '<option value="vip">' . esc_html__('VIP', 'aksrt') . '</option>';
        echo '<option value="credits">' . esc_html__('积分', 'aksrt') . '</option>';
        echo '</select></label></p>';
        echo '<p><label>' . esc_html__('数量', 'aksrt') . '<br><input type="number" name="count" min="1" max="500" value="10" /></label></p>';
        echo '<p><label>' . esc_html__('长度', 'aksrt') . '<br><input type="number" name="length" min="8" max="32" value="16" /></label></p>';
        echo '<p><label>' . esc_html__('前缀', 'aksrt') . '<br><input type="text" name="prefix" value="" /></label></p>';
        echo '<p><label>' . esc_html__('面额/积分', 'aksrt') . '<br><input type="number" step="0.01" name="amount" value="10" /></label></p>';
        echo '<p><label>' . esc_html__('VIP等级', 'aksrt') . '<br><input type="number" name="vip_level" min="1" max="2" value="1" /></label></p>';
        echo '<p><label>' . esc_html__('VIP天数', 'aksrt') . '<br><input type="number" name="vip_days" min="1" value="30" /></label></p>';
        echo '<p><label>' . esc_html__('备注', 'aksrt') . '<br><input type="text" name="note" value="" /></label></p>';
        submit_button(__('生成', 'aksrt'), 'primary', '', false);
        echo '</form>';

        if (!empty($_GET['aksrt_generated'])) {
            $generated = (int) $_GET['aksrt_generated'];
            echo '<div class="notice notice-success"><p>' . esc_html(sprintf(
                /* translators: %d count */
                __('成功生成 %d 张卡密。', 'aksrt'),
                $generated
            )) . '</p></div>';
        }

        echo '<form method="get" style="margin:12px 0;">';
        echo '<input type="hidden" name="page" value="aksrt_charge_cards" />';
        echo '<select name="status">';
        foreach ([
            ''         => __('全部状态', 'aksrt'),
            'active'   => __('可用', 'aksrt'),
            'used'     => __('已用', 'aksrt'),
            'disabled' => __('已禁用', 'aksrt'),
        ] as $key => $label) {
            printf(
                '<option value="%s"%s>%s</option>',
                esc_attr($key),
                selected($status, $key, false),
                esc_html($label)
            );
        }
        echo '</select> ';
        echo '<select name="type">';
        foreach ([
            ''        => __('全部类型', 'aksrt'),
            'balance' => __('余额', 'aksrt'),
            'vip'     => __('VIP', 'aksrt'),
            'points'  => __('积分', 'aksrt'),
            'credits' => __('积分(credits)', 'aksrt'),
        ] as $key => $label) {
            printf(
                '<option value="%s"%s>%s</option>',
                esc_attr($key),
                selected($type, $key, false),
                esc_html($label)
            );
        }
        echo '</select> ';
        submit_button(__('筛选', 'aksrt'), 'secondary', '', false);
        echo '</form>';

        $result = $svc->get_list([
            'status' => $status,
            'type'   => $type,
            'limit'  => $per_page,
            'offset' => ($page_num - 1) * $per_page,
        ]);
        $items = $result['items'] ?? [];
        $total = (int) ($result['total'] ?? 0);
        $pages = max(1, (int) ($result['max_pages'] ?? 1));

        echo '<table class="wp-list-table widefat fixed striped">';
        echo '<thead><tr>';
        echo '<th>ID</th>';
        echo '<th>' . esc_html__('类型', 'aksrt') . '</th>';
        echo '<th>' . esc_html__('密码', 'aksrt') . '</th>';
        echo '<th>' . esc_html__('面额', 'aksrt') . '</th>';
        echo '<th>' . esc_html__('状态', 'aksrt') . '</th>';
        echo '<th>' . esc_html__('使用者', 'aksrt') . '</th>';
        echo '<th>' . esc_html__('创建时间', 'aksrt') . '</th>';
        echo '<th>' . esc_html__('操作', 'aksrt') . '</th>';
        echo '</tr></thead><tbody>';

        if (!$items) {
            echo '<tr><td colspan="8">' . esc_html__('暂无卡密', 'aksrt') . '</td></tr>';
        }

        foreach ($items as $row) {
            $id      = (int) ($row['id'] ?? 0);
            $st      = (string) ($row['status'] ?? '');
            $user_id = (int) ($row['used_by'] ?? $row['user_id'] ?? 0);
            $user    = $user_id > 0 ? get_userdata($user_id) : null;

            echo '<tr>';
            echo '<td>' . esc_html((string) $id) . '</td>';
            echo '<td>' . esc_html((string) ($row['type'] ?? '')) . '</td>';
            echo '<td><code>' . esc_html((string) ($row['password'] ?? $row['code'] ?? '')) . '</code></td>';
            echo '<td>' . esc_html((string) ($row['amount'] ?? '')) . '</td>';
            echo '<td>' . esc_html($st) . '</td>';
            echo '<td>' . ($user ? esc_html($user->display_name) : '—') . '</td>';
            echo '<td>' . esc_html((string) ($row['created_at'] ?? '')) . '</td>';
            echo '<td>';
            if ($st === 'active') {
                echo '<form method="post" action="' . esc_url(admin_url('admin-post.php')) . '">';
                echo '<input type="hidden" name="action" value="aksrt_pay_disable_charge_card" />';
                echo '<input type="hidden" name="card_id" value="' . esc_attr((string) $id) . '" />';
                wp_nonce_field('aksrt_pay_disable_charge_card_' . $id);
                submit_button(__('禁用', 'aksrt'), 'small', '', false);
                echo '</form>';
            } else {
                echo '—';
            }
            echo '</td>';
            echo '</tr>';
        }

        echo '</tbody></table>';

        if ($pages > 1) {
            echo '<div class="tablenav"><div class="tablenav-pages">';
            echo paginate_links([
                'base'      => add_query_arg('paged', '%#%'),
                'format'    => '',
                'prev_text' => '&laquo;',
                'next_text' => '&raquo;',
                'total'     => $pages,
                'current'   => $page_num,
            ]);
            echo '</div></div>';
        }

        $this->render_footer();
    }

    public function handle_disable_charge_card(): void {
        if (!current_user_can(self::CAPABILITY)) {
            wp_die(esc_html__('权限不足', 'aksrt'));
        }

        $id = isset($_POST['card_id']) ? (int) $_POST['card_id'] : 0;
        check_admin_referer('aksrt_pay_disable_charge_card_' . $id);

        $ok = false;
        if ($id > 0 && class_exists('AKSRT_Charge_Card')) {
            $ok = AKSRT_Charge_Card::get_instance()->disable($id);
        }

        wp_safe_redirect($this->page_url('aksrt_charge_cards', [
            'aksrt_pay_msg' => $ok ? 'card_disabled' : 'card_failed',
        ]));
        exit;
    }

    public function handle_batch_charge_cards(): void {
        if (!current_user_can(self::CAPABILITY)) {
            wp_die(esc_html__('权限不足', 'aksrt'));
        }
        check_admin_referer('aksrt_pay_batch_charge_cards');

        if (!class_exists('AKSRT_Charge_Card')) {
            wp_safe_redirect($this->page_url('aksrt_charge_cards', ['aksrt_pay_msg' => 'card_batch_failed']));
            exit;
        }

        $type   = isset($_POST['type']) ? sanitize_key((string) wp_unslash($_POST['type'])) : 'balance';
        $count  = isset($_POST['count']) ? (int) $_POST['count'] : 10;
        $length = isset($_POST['length']) ? (int) $_POST['length'] : 16;
        $prefix = isset($_POST['prefix']) ? sanitize_text_field((string) wp_unslash($_POST['prefix'])) : '';
        $amount = isset($_POST['amount']) ? (float) wp_unslash($_POST['amount']) : 0;
        $note   = isset($_POST['note']) ? sanitize_textarea_field((string) wp_unslash($_POST['note'])) : '';
        $level  = isset($_POST['vip_level']) ? max(1, min(2, (int) $_POST['vip_level'])) : 1;
        $days   = isset($_POST['vip_days']) ? max(1, (int) $_POST['vip_days']) : 30;

        if ($type === 'points') {
            $type = 'credits';
        }

        $meta = [];
        if ($type === 'balance') {
            $meta['amount'] = max(0, $amount);
        } elseif ($type === 'credits') {
            $meta['points'] = max(0, (int) $amount);
        } elseif ($type === 'vip') {
            $meta['level'] = $level;
            $meta['days']  = $days;
        }

        $codes = AKSRT_Charge_Card::get_instance()->batch_create($type, $meta, $count, $length, $prefix, '', $note);
        $ok    = !empty($codes);

        wp_safe_redirect($this->page_url('aksrt_charge_cards', [
            'aksrt_pay_msg'   => $ok ? 'card_batch_ok' : 'card_batch_failed',
            'aksrt_generated' => count($codes),
        ]));
        exit;
    }

    /* ------------------------------------------------------------------
     * Shipping
     * ----------------------------------------------------------------*/

    public function render_shipping_page(): void {
        $this->ensure_cap();
        $this->render_header(__('发货及物流', 'aksrt'));

        if (!class_exists('AKSRT_Shipping')) {
            echo '<div class="notice notice-error"><p>' . esc_html__('物流模块未初始化。', 'aksrt') . '</p></div>';
            $this->render_footer();
            return;
        }

        $status   = isset($_GET['status']) ? sanitize_key((string) wp_unslash($_GET['status'])) : '';
        $search   = isset($_GET['s']) ? sanitize_text_field((string) wp_unslash($_GET['s'])) : '';
        $page_num = max(1, (int) ($_GET['paged'] ?? 1));
        $per_page = 20;
        $svc      = AKSRT_Shipping::get_instance();
        $stats    = $svc->get_stats();

        echo '<p>' . esc_html(sprintf(
            /* translators: 1: total */
            __('物流记录共 %d 条', 'aksrt'),
            (int) ($stats['total'] ?? 0)
        )) . '</p>';

        echo '<form method="get" style="margin:12px 0;">';
        echo '<input type="hidden" name="page" value="aksrt_shipping" />';
        echo '<select name="status">';
        $status_options = [
            ''           => __('全部状态', 'aksrt'),
            'shipped'    => __('已发货', 'aksrt'),
            'in_transit' => __('运输中', 'aksrt'),
            'delivered'  => __('已签收', 'aksrt'),
            'returned'   => __('已退回', 'aksrt'),
        ];
        foreach ($status_options as $key => $label) {
            printf('<option value="%s"%s>%s</option>', esc_attr($key), selected($status, $key, false), esc_html($label));
        }
        echo '</select> ';
        echo '<input type="search" name="s" value="' . esc_attr($search) . '" placeholder="' . esc_attr__('订单号 / 运单号', 'aksrt') . '" /> ';
        submit_button(__('筛选', 'aksrt'), 'secondary', '', false);
        echo '</form>';

        $args = [
            'status' => $status,
            'limit'  => $per_page,
            'offset' => ($page_num - 1) * $per_page,
        ];
        if ($search !== '') {
            if (preg_match('/^[A-Za-z0-9_-]+$/', $search)) {
                $args['order_number'] = $search;
            } else {
                $args['tracking_no'] = $search;
            }
        }
        $result = $svc->get_list($args);
        $items  = $result['items'] ?? [];
        $total  = (int) ($result['total'] ?? 0);
        $pages  = max(1, (int) ceil(max(1, $total) / $per_page));

        echo '<table class="wp-list-table widefat fixed striped"><thead><tr>';
        echo '<th>ID</th><th>' . esc_html__('订单号', 'aksrt') . '</th><th>' . esc_html__('承运商', 'aksrt') . '</th><th>' . esc_html__('运单号', 'aksrt') . '</th><th>' . esc_html__('状态', 'aksrt') . '</th><th>' . esc_html__('时间', 'aksrt') . '</th><th>' . esc_html__('操作', 'aksrt') . '</th>';
        echo '</tr></thead><tbody>';
        if (!$items) {
            echo '<tr><td colspan="7">' . esc_html__('暂无物流记录', 'aksrt') . '</td></tr>';
        }
        foreach ($items as $row) {
            $id = (int) ($row['id'] ?? 0);
            $st = (string) ($row['status'] ?? '');
            echo '<tr>';
            echo '<td>' . esc_html((string) $id) . '</td>';
            echo '<td><code>' . esc_html((string) ($row['order_number'] ?? '')) . '</code></td>';
            echo '<td>' . esc_html((string) ($row['carrier'] ?? '')) . '</td>';
            echo '<td>' . esc_html((string) ($row['tracking_no'] ?? '')) . '</td>';
            echo '<td>' . esc_html($status_options[$st] ?? $st) . '</td>';
            echo '<td>' . esc_html((string) ($row['created_at'] ?? '')) . '</td>';
            echo '<td><form method="post" action="' . esc_url(admin_url('admin-post.php')) . '" style="display:flex;gap:4px;align-items:center;">';
            echo '<input type="hidden" name="action" value="aksrt_pay_update_shipping" />';
            echo '<input type="hidden" name="shipping_id" value="' . esc_attr((string) $id) . '" />';
            wp_nonce_field('aksrt_pay_update_shipping_' . $id);
            echo '<select name="new_status">';
            foreach ($status_options as $key => $label) {
                if ($key === '') {
                    continue;
                }
                printf('<option value="%s"%s>%s</option>', esc_attr($key), selected($st, $key, false), esc_html($label));
            }
            echo '</select>';
            echo '<input type="text" name="note" placeholder="' . esc_attr__('备注', 'aksrt') . '" />';
            submit_button(__('更新', 'aksrt'), 'small', '', false);
            echo '</form></td></tr>';
        }
        echo '</tbody></table>';
        $this->render_pagination($pages, $page_num);
        $this->render_footer();
    }

    public function handle_update_shipping(): void {
        if (!current_user_can(self::CAPABILITY)) {
            wp_die(esc_html__('权限不足', 'aksrt'));
        }
        $id         = isset($_POST['shipping_id']) ? (int) $_POST['shipping_id'] : 0;
        $new_status = isset($_POST['new_status']) ? sanitize_key((string) wp_unslash($_POST['new_status'])) : '';
        $note       = isset($_POST['note']) ? sanitize_textarea_field((string) wp_unslash($_POST['note'])) : '';
        check_admin_referer('aksrt_pay_update_shipping_' . $id);

        $ok = false;
        if ($id > 0 && $new_status !== '' && class_exists('AKSRT_Shipping')) {
            $ok = AKSRT_Shipping::get_instance()->update_status($id, $new_status, $note, get_current_user_id());
        }
        wp_safe_redirect($this->page_url('aksrt_shipping', ['aksrt_pay_msg' => $ok ? 'shipping_updated' : 'shipping_failed']));
        exit;
    }

    /* ------------------------------------------------------------------
     * After-sale
     * ----------------------------------------------------------------*/

    public function render_after_sale_page(): void {
        $this->ensure_cap();
        $this->render_header(__('售后管理', 'aksrt'));

        if (!class_exists('AKSRT_After_Sale')) {
            echo '<div class="notice notice-error"><p>' . esc_html__('售后模块未初始化。', 'aksrt') . '</p></div>';
            $this->render_footer();
            return;
        }

        $status   = isset($_GET['status']) ? sanitize_key((string) wp_unslash($_GET['status'])) : '';
        $page_num = max(1, (int) ($_GET['paged'] ?? 1));
        $per_page = 20;
        $svc      = AKSRT_After_Sale::get_instance();
        $stats    = $svc->get_stats();

        echo '<p>' . esc_html(sprintf(
            /* translators: 1: total 2: pending */
            __('售后工单共 %1$d · 待处理 %2$d', 'aksrt'),
            (int) ($stats['total'] ?? 0),
            (int) ($stats['pending'] ?? 0)
        )) . '</p>';

        $status_options = [
            ''           => __('全部状态', 'aksrt'),
            'pending'    => __('待处理', 'aksrt'),
            'processing' => __('处理中', 'aksrt'),
            'approved'   => __('已通过', 'aksrt'),
            'rejected'   => __('已拒绝', 'aksrt'),
            'completed'  => __('已完成', 'aksrt'),
            'cancelled'  => __('已取消', 'aksrt'),
        ];

        echo '<form method="get" style="margin:12px 0;">';
        echo '<input type="hidden" name="page" value="aksrt_after_sale" />';
        echo '<select name="status">';
        foreach ($status_options as $key => $label) {
            printf('<option value="%s"%s>%s</option>', esc_attr($key), selected($status, $key, false), esc_html($label));
        }
        echo '</select> ';
        submit_button(__('筛选', 'aksrt'), 'secondary', '', false);
        echo '</form>';

        $result = $svc->get_list([
            'status' => $status,
            'limit'  => $per_page,
            'offset' => ($page_num - 1) * $per_page,
        ]);
        $items = $result['items'] ?? [];
        $total = (int) ($result['total'] ?? 0);
        $pages = max(1, (int) ceil(max(1, $total) / $per_page));

        echo '<table class="wp-list-table widefat fixed striped"><thead><tr>';
        echo '<th>ID</th><th>' . esc_html__('订单号', 'aksrt') . '</th><th>' . esc_html__('类型', 'aksrt') . '</th><th>' . esc_html__('用户', 'aksrt') . '</th><th>' . esc_html__('状态', 'aksrt') . '</th><th>' . esc_html__('时间', 'aksrt') . '</th><th>' . esc_html__('操作', 'aksrt') . '</th>';
        echo '</tr></thead><tbody>';
        if (!$items) {
            echo '<tr><td colspan="7">' . esc_html__('暂无售后工单', 'aksrt') . '</td></tr>';
        }
        foreach ($items as $row) {
            $id      = (int) ($row['id'] ?? 0);
            $user_id = (int) ($row['user_id'] ?? 0);
            $user    = $user_id > 0 ? get_userdata($user_id) : null;
            $st      = (string) ($row['status'] ?? '');
            echo '<tr>';
            echo '<td>' . esc_html((string) $id) . '</td>';
            echo '<td><code>' . esc_html((string) ($row['order_number'] ?? '')) . '</code></td>';
            echo '<td>' . esc_html((string) ($row['type'] ?? '')) . '</td>';
            echo '<td>' . ($user ? esc_html($user->display_name) : esc_html((string) $user_id)) . '</td>';
            echo '<td>' . esc_html($status_options[$st] ?? $st) . '</td>';
            echo '<td>' . esc_html((string) ($row['created_at'] ?? '')) . '</td>';
            echo '<td><form method="post" action="' . esc_url(admin_url('admin-post.php')) . '" style="display:flex;gap:4px;align-items:center;flex-wrap:wrap;">';
            echo '<input type="hidden" name="action" value="aksrt_pay_update_after_sale" />';
            echo '<input type="hidden" name="ticket_id" value="' . esc_attr((string) $id) . '" />';
            wp_nonce_field('aksrt_pay_update_after_sale_' . $id);
            echo '<select name="new_status">';
            foreach ($status_options as $key => $label) {
                if ($key === '') {
                    continue;
                }
                printf('<option value="%s"%s>%s</option>', esc_attr($key), selected($st, $key, false), esc_html($label));
            }
            echo '</select>';
            echo '<input type="text" name="note" placeholder="' . esc_attr__('备注', 'aksrt') . '" />';
            submit_button(__('更新', 'aksrt'), 'small', '', false);
            echo '</form></td></tr>';
        }
        echo '</tbody></table>';
        $this->render_pagination($pages, $page_num);
        $this->render_footer();
    }

    public function handle_update_after_sale(): void {
        if (!current_user_can(self::CAPABILITY)) {
            wp_die(esc_html__('权限不足', 'aksrt'));
        }
        $id         = isset($_POST['ticket_id']) ? (int) $_POST['ticket_id'] : 0;
        $new_status = isset($_POST['new_status']) ? sanitize_key((string) wp_unslash($_POST['new_status'])) : '';
        $note       = isset($_POST['note']) ? sanitize_textarea_field((string) wp_unslash($_POST['note'])) : '';
        check_admin_referer('aksrt_pay_update_after_sale_' . $id);

        $ok = false;
        if ($id > 0 && $new_status !== '' && class_exists('AKSRT_After_Sale')) {
            $ok = AKSRT_After_Sale::get_instance()->update_status($id, $new_status, get_current_user_id(), $note);
        }
        wp_safe_redirect($this->page_url('aksrt_after_sale', ['aksrt_pay_msg' => $ok ? 'after_sale_updated' : 'after_sale_failed']));
        exit;
    }

    /* ------------------------------------------------------------------
     * Coupons
     * ----------------------------------------------------------------*/

    public function render_coupons_page(): void {
        $this->ensure_cap();
        $this->render_header(__('优惠码', 'aksrt'));

        if (!class_exists('AKSRT_Coupon')) {
            echo '<div class="notice notice-error"><p>' . esc_html__('优惠码模块未初始化。', 'aksrt') . '</p></div>';
            $this->render_footer();
            return;
        }

        $status   = isset($_GET['status']) ? sanitize_key((string) wp_unslash($_GET['status'])) : '';
        $search   = isset($_GET['s']) ? sanitize_text_field((string) wp_unslash($_GET['s'])) : '';
        $page_num = max(1, (int) ($_GET['paged'] ?? 1));
        $per_page = 20;
        $svc      = AKSRT_Coupon::get_instance();

        echo '<h2>' . esc_html__('新建优惠码', 'aksrt') . '</h2>';
        echo '<form method="post" action="' . esc_url(admin_url('admin-post.php')) . '" style="margin-bottom:20px;display:flex;gap:8px;flex-wrap:wrap;align-items:end;">';
        echo '<input type="hidden" name="action" value="aksrt_pay_create_coupon" />';
        wp_nonce_field('aksrt_pay_create_coupon');
        echo '<p><label>' . esc_html__('代码', 'aksrt') . '<br><input type="text" name="code" required /></label></p>';
        echo '<p><label>' . esc_html__('类型', 'aksrt') . '<br><select name="type"><option value="fixed">' . esc_html__('固定金额', 'aksrt') . '</option><option value="percent">' . esc_html__('折扣百分比', 'aksrt') . '</option></select></label></p>';
        echo '<p><label>' . esc_html__('面值', 'aksrt') . '<br><input type="number" step="0.01" name="value" value="0" /></label></p>';
        echo '<p><label>' . esc_html__('最低消费', 'aksrt') . '<br><input type="number" step="0.01" name="min_amount" value="0" /></label></p>';
        echo '<p><label>' . esc_html__('总次数(0=不限)', 'aksrt') . '<br><input type="number" name="usage_limit" value="0" /></label></p>';
        echo '<p><label>' . esc_html__('过期时间', 'aksrt') . '<br><input type="datetime-local" name="expires_at" /></label></p>';
        submit_button(__('创建', 'aksrt'), 'primary', '', false);
        echo '</form>';

        echo '<form method="get" style="margin:12px 0;">';
        echo '<input type="hidden" name="page" value="aksrt_coupons" />';
        echo '<select name="status">';
        foreach (['' => __('全部状态', 'aksrt'), 'active' => __('可用', 'aksrt'), 'disabled' => __('已禁用', 'aksrt')] as $key => $label) {
            printf('<option value="%s"%s>%s</option>', esc_attr($key), selected($status, $key, false), esc_html($label));
        }
        echo '</select> ';
        echo '<input type="search" name="s" value="' . esc_attr($search) . '" placeholder="' . esc_attr__('搜索代码', 'aksrt') . '" /> ';
        submit_button(__('筛选', 'aksrt'), 'secondary', '', false);
        echo '</form>';

        $result = $svc->get_list([
            'status' => $status,
            'search' => $search,
            'limit'  => $per_page,
            'offset' => ($page_num - 1) * $per_page,
        ]);
        $items = $result['items'] ?? [];
        $total = (int) ($result['total'] ?? 0);
        $pages = max(1, (int) ($result['total_pages'] ?? 1));

        echo '<table class="wp-list-table widefat fixed striped"><thead><tr>';
        echo '<th>ID</th><th>' . esc_html__('代码', 'aksrt') . '</th><th>' . esc_html__('类型', 'aksrt') . '</th><th>' . esc_html__('面值', 'aksrt') . '</th><th>' . esc_html__('已用/上限', 'aksrt') . '</th><th>' . esc_html__('状态', 'aksrt') . '</th><th>' . esc_html__('过期', 'aksrt') . '</th><th>' . esc_html__('操作', 'aksrt') . '</th>';
        echo '</tr></thead><tbody>';
        if (!$items) {
            echo '<tr><td colspan="8">' . esc_html__('暂无优惠码', 'aksrt') . '</td></tr>';
        }
        foreach ($items as $row) {
            $id = (int) ($row['id'] ?? 0);
            $st = (string) ($row['status'] ?? '');
            echo '<tr>';
            echo '<td>' . esc_html((string) $id) . '</td>';
            echo '<td><code>' . esc_html((string) ($row['code'] ?? '')) . '</code></td>';
            echo '<td>' . esc_html((string) ($row['type'] ?? '')) . '</td>';
            echo '<td>' . esc_html((string) ($row['value'] ?? '')) . '</td>';
            echo '<td>' . esc_html((string) ((int) ($row['used_count'] ?? 0)) . '/' . (string) ((int) ($row['usage_limit'] ?? 0))) . '</td>';
            echo '<td>' . esc_html($st) . '</td>';
            echo '<td>' . esc_html((string) ($row['expires_at'] ?? '')) . '</td>';
            echo '<td>';
            if ($st === 'active') {
                echo '<form method="post" action="' . esc_url(admin_url('admin-post.php')) . '">';
                echo '<input type="hidden" name="action" value="aksrt_pay_disable_coupon" />';
                echo '<input type="hidden" name="coupon_id" value="' . esc_attr((string) $id) . '" />';
                wp_nonce_field('aksrt_pay_disable_coupon_' . $id);
                submit_button(__('禁用', 'aksrt'), 'small', '', false);
                echo '</form>';
            } else {
                echo '—';
            }
            echo '</td></tr>';
        }
        echo '</tbody></table>';
        $this->render_pagination($pages, $page_num);
        $this->render_footer();
    }

    public function handle_create_coupon(): void {
        if (!current_user_can(self::CAPABILITY)) {
            wp_die(esc_html__('权限不足', 'aksrt'));
        }
        check_admin_referer('aksrt_pay_create_coupon');

        $ok = false;
        if (class_exists('AKSRT_Coupon')) {
            $expires = isset($_POST['expires_at']) ? sanitize_text_field((string) wp_unslash($_POST['expires_at'])) : '';
            if ($expires !== '') {
                $expires = str_replace('T', ' ', $expires) . ':00';
            }
            $id = AKSRT_Coupon::get_instance()->create([
                'code'        => sanitize_text_field((string) wp_unslash($_POST['code'] ?? '')),
                'type'        => sanitize_key((string) wp_unslash($_POST['type'] ?? 'fixed')),
                'value'       => (float) ($_POST['value'] ?? 0),
                'min_amount'  => (float) ($_POST['min_amount'] ?? 0),
                'usage_limit' => (int) ($_POST['usage_limit'] ?? 0),
                'expires_at'  => $expires,
            ]);
            $ok = $id > 0;
        }
        wp_safe_redirect($this->page_url('aksrt_coupons', ['aksrt_pay_msg' => $ok ? 'coupon_created' : 'coupon_create_failed']));
        exit;
    }

    public function handle_disable_coupon(): void {
        if (!current_user_can(self::CAPABILITY)) {
            wp_die(esc_html__('权限不足', 'aksrt'));
        }
        $id = isset($_POST['coupon_id']) ? (int) $_POST['coupon_id'] : 0;
        check_admin_referer('aksrt_pay_disable_coupon_' . $id);
        $ok = $id > 0 && class_exists('AKSRT_Coupon') && AKSRT_Coupon::get_instance()->disable($id);
        wp_safe_redirect($this->page_url('aksrt_coupons', ['aksrt_pay_msg' => $ok ? 'coupon_disabled' : 'coupon_failed']));
        exit;
    }

    /* ------------------------------------------------------------------
     * Income / rebate
     * ----------------------------------------------------------------*/

    public function render_income_page(): void {
        $this->ensure_cap();
        $this->render_header(__('创作分成', 'aksrt'));

        if (!class_exists('AKSRT_Revenue')) {
            echo '<div class="notice notice-error"><p>' . esc_html__('分成模块未初始化。', 'aksrt') . '</p></div>';
            $this->render_footer();
            return;
        }

        $status   = isset($_GET['status']) ? sanitize_key((string) wp_unslash($_GET['status'])) : '';
        $page_num = max(1, (int) ($_GET['paged'] ?? 1));
        $per_page = 20;
        $svc      = AKSRT_Revenue::get_instance();
        $stats    = $svc->get_stats();

        echo '<p>' . esc_html(sprintf(
            /* translators: 1: total 2: pending 3: settled */
            __('合计 %1$s · 待结算 %2$s · 已结算 %3$s', 'aksrt'),
            number_format((float) ($stats['total'] ?? 0), 2),
            number_format((float) ($stats['pending'] ?? 0), 2),
            number_format((float) ($stats['settled'] ?? 0), 2)
        )) . '</p>';

        echo '<form method="get" style="margin:12px 0;">';
        echo '<input type="hidden" name="page" value="aksrt_income" />';
        echo '<select name="status">';
        foreach (['' => __('全部状态', 'aksrt'), 'pending' => __('待结算', 'aksrt'), 'settled' => __('已结算', 'aksrt')] as $key => $label) {
            printf('<option value="%s"%s>%s</option>', esc_attr($key), selected($status, $key, false), esc_html($label));
        }
        echo '</select> ';
        submit_button(__('筛选', 'aksrt'), 'secondary', '', false);
        echo '</form>';

        $result = $svc->get_list([
            'status' => $status,
            'limit'  => $per_page,
            'offset' => ($page_num - 1) * $per_page,
        ]);
        $items = $result['items'] ?? [];
        $total = (int) ($result['total'] ?? 0);
        $pages = max(1, (int) ($result['max_pages'] ?? 1));

        echo '<table class="wp-list-table widefat fixed striped"><thead><tr>';
        echo '<th>ID</th><th>' . esc_html__('用户', 'aksrt') . '</th><th>' . esc_html__('订单号', 'aksrt') . '</th><th>' . esc_html__('金额', 'aksrt') . '</th><th>' . esc_html__('状态', 'aksrt') . '</th><th>' . esc_html__('时间', 'aksrt') . '</th><th>' . esc_html__('操作', 'aksrt') . '</th>';
        echo '</tr></thead><tbody>';
        if (!$items) {
            echo '<tr><td colspan="7">' . esc_html__('暂无分成记录', 'aksrt') . '</td></tr>';
        }
        foreach ($items as $row) {
            $id      = (int) ($row['id'] ?? 0);
            $user_id = (int) ($row['user_id'] ?? 0);
            $user    = $user_id > 0 ? get_userdata($user_id) : null;
            $st      = (string) ($row['status'] ?? '');
            echo '<tr>';
            echo '<td>' . esc_html((string) $id) . '</td>';
            echo '<td>' . ($user ? esc_html($user->display_name) : esc_html((string) $user_id)) . '</td>';
            echo '<td><code>' . esc_html((string) ($row['order_number'] ?? '')) . '</code></td>';
            echo '<td>' . esc_html(number_format((float) ($row['amount'] ?? 0), 2)) . '</td>';
            echo '<td>' . esc_html($st) . '</td>';
            echo '<td>' . esc_html((string) ($row['created_at'] ?? '')) . '</td>';
            echo '<td>';
            if ($st === 'pending') {
                echo '<form method="post" action="' . esc_url(admin_url('admin-post.php')) . '">';
                echo '<input type="hidden" name="action" value="aksrt_pay_settle_income" />';
                echo '<input type="hidden" name="revenue_id" value="' . esc_attr((string) $id) . '" />';
                wp_nonce_field('aksrt_pay_settle_income_' . $id);
                submit_button(__('结算', 'aksrt'), 'small', '', false);
                echo '</form>';
            } else {
                echo '—';
            }
            echo '</td></tr>';
        }
        echo '</tbody></table>';
        $this->render_pagination($pages, $page_num);
        $this->render_footer();
    }

    public function handle_settle_income(): void {
        if (!current_user_can(self::CAPABILITY)) {
            wp_die(esc_html__('权限不足', 'aksrt'));
        }
        $id = isset($_POST['revenue_id']) ? (int) $_POST['revenue_id'] : 0;
        check_admin_referer('aksrt_pay_settle_income_' . $id);
        $ok = $id > 0 && class_exists('AKSRT_Revenue') && AKSRT_Revenue::get_instance()->settle($id);
        wp_safe_redirect($this->page_url('aksrt_income', ['aksrt_pay_msg' => $ok ? 'income_settled' : 'income_failed']));
        exit;
    }

    public function render_rebate_page(): void {
        $this->ensure_cap();
        $this->render_header(__('推广返佣', 'aksrt'));

        if (!class_exists('AKSRT_Rebate')) {
            echo '<div class="notice notice-error"><p>' . esc_html__('返佣模块未初始化。', 'aksrt') . '</p></div>';
            $this->render_footer();
            return;
        }

        $status   = isset($_GET['status']) ? sanitize_key((string) wp_unslash($_GET['status'])) : '';
        $page_num = max(1, (int) ($_GET['paged'] ?? 1));
        $per_page = 20;
        $svc      = AKSRT_Rebate::get_instance();
        $stats    = $svc->get_stats();

        echo '<p>' . esc_html(sprintf(
            /* translators: 1: total 2: pending 3: settled amount */
            __('记录 %1$d · 待结算 %2$d · 已结算金额 %3$s', 'aksrt'),
            (int) ($stats['total'] ?? 0),
            (int) ($stats['pending'] ?? 0),
            number_format((float) ($stats['settled_amount'] ?? 0), 2)
        )) . '</p>';

        echo '<form method="get" style="margin:12px 0;">';
        echo '<input type="hidden" name="page" value="aksrt_rebate" />';
        echo '<select name="status">';
        foreach (['' => __('全部状态', 'aksrt'), 'pending' => __('待结算', 'aksrt'), 'settled' => __('已结算', 'aksrt'), 'cancelled' => __('已取消', 'aksrt')] as $key => $label) {
            printf('<option value="%s"%s>%s</option>', esc_attr($key), selected($status, $key, false), esc_html($label));
        }
        echo '</select> ';
        submit_button(__('筛选', 'aksrt'), 'secondary', '', false);
        echo '</form>';

        $result = $svc->get_list([
            'status' => $status,
            'limit'  => $per_page,
            'offset' => ($page_num - 1) * $per_page,
        ]);
        $items = $result['items'] ?? [];
        $total = (int) ($result['total'] ?? 0);
        $pages = max(1, (int) ceil(max(1, $total) / $per_page));

        echo '<table class="wp-list-table widefat fixed striped"><thead><tr>';
        echo '<th>ID</th><th>' . esc_html__('用户', 'aksrt') . '</th><th>' . esc_html__('订单号', 'aksrt') . '</th><th>' . esc_html__('金额', 'aksrt') . '</th><th>' . esc_html__('状态', 'aksrt') . '</th><th>' . esc_html__('时间', 'aksrt') . '</th><th>' . esc_html__('操作', 'aksrt') . '</th>';
        echo '</tr></thead><tbody>';
        if (!$items) {
            echo '<tr><td colspan="7">' . esc_html__('暂无返佣记录', 'aksrt') . '</td></tr>';
        }
        foreach ($items as $row) {
            $id      = (int) ($row['id'] ?? 0);
            $user_id = (int) ($row['user_id'] ?? 0);
            $user    = $user_id > 0 ? get_userdata($user_id) : null;
            $st      = (string) ($row['status'] ?? '');
            echo '<tr>';
            echo '<td>' . esc_html((string) $id) . '</td>';
            echo '<td>' . ($user ? esc_html($user->display_name) : esc_html((string) $user_id)) . '</td>';
            echo '<td><code>' . esc_html((string) ($row['order_number'] ?? '')) . '</code></td>';
            echo '<td>' . esc_html(number_format((float) ($row['amount'] ?? 0), 2)) . '</td>';
            echo '<td>' . esc_html($st) . '</td>';
            echo '<td>' . esc_html((string) ($row['created_at'] ?? '')) . '</td>';
            echo '<td style="display:flex;gap:4px;">';
            if ($st === 'pending') {
                echo '<form method="post" action="' . esc_url(admin_url('admin-post.php')) . '">';
                echo '<input type="hidden" name="action" value="aksrt_pay_settle_rebate" />';
                echo '<input type="hidden" name="rebate_id" value="' . esc_attr((string) $id) . '" />';
                wp_nonce_field('aksrt_pay_settle_rebate_' . $id);
                submit_button(__('结算', 'aksrt'), 'small', '', false);
                echo '</form>';
                echo '<form method="post" action="' . esc_url(admin_url('admin-post.php')) . '">';
                echo '<input type="hidden" name="action" value="aksrt_pay_cancel_rebate" />';
                echo '<input type="hidden" name="rebate_id" value="' . esc_attr((string) $id) . '" />';
                wp_nonce_field('aksrt_pay_cancel_rebate_' . $id);
                submit_button(__('取消', 'aksrt'), 'small', '', false);
                echo '</form>';
            } else {
                echo '—';
            }
            echo '</td></tr>';
        }
        echo '</tbody></table>';
        $this->render_pagination($pages, $page_num);
        $this->render_footer();
    }

    public function handle_settle_rebate(): void {
        if (!current_user_can(self::CAPABILITY)) {
            wp_die(esc_html__('权限不足', 'aksrt'));
        }
        $id = isset($_POST['rebate_id']) ? (int) $_POST['rebate_id'] : 0;
        check_admin_referer('aksrt_pay_settle_rebate_' . $id);
        $ok = $id > 0 && class_exists('AKSRT_Rebate') && AKSRT_Rebate::get_instance()->settle($id);
        wp_safe_redirect($this->page_url('aksrt_rebate', ['aksrt_pay_msg' => $ok ? 'rebate_settled' : 'rebate_failed']));
        exit;
    }

    public function handle_cancel_rebate(): void {
        if (!current_user_can(self::CAPABILITY)) {
            wp_die(esc_html__('权限不足', 'aksrt'));
        }
        $id = isset($_POST['rebate_id']) ? (int) $_POST['rebate_id'] : 0;
        check_admin_referer('aksrt_pay_cancel_rebate_' . $id);
        $ok = $id > 0 && class_exists('AKSRT_Rebate') && AKSRT_Rebate::get_instance()->cancel($id);
        wp_safe_redirect($this->page_url('aksrt_rebate', ['aksrt_pay_msg' => $ok ? 'rebate_cancelled' : 'rebate_failed']));
        exit;
    }

    private function render_pagination(int $pages, int $page_num): void {
        if ($pages <= 1) {
            return;
        }
        echo '<div class="tablenav"><div class="tablenav-pages">';
        echo paginate_links([
            'base'      => add_query_arg('paged', '%#%'),
            'format'    => '',
            'prev_text' => '&laquo;',
            'next_text' => '&raquo;',
            'total'     => $pages,
            'current'   => $page_num,
        ]);
        echo '</div></div>';
    }
}