<?php
/**
 * @package AKSRT
 */

namespace AKSRT\Admin\Native;

defined('ABSPATH') || exit;

class PayMenus {

    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']);
        // Domain admin_post handlers are registered by dedicated modules.
    }

    /**
     * @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' => static function (): void {
                    if (class_exists('AKSRT\Admin\Native\PayOrders')) {
                        PayOrders::get_instance()->render_orders_page();
                        return;
                    }
                    wp_die(esc_html__('订单模块未初始化。', 'aksrt'));
                },
            ],
            'products' => [
                'slug'     => 'aksrt_pay_products',
                'title'    => __('付费文章', 'aksrt'),
                'callback' => static function (): void {
                    if (class_exists('AKSRT\\Admin\\Native\\PayProducts')) {
                        PayProducts::get_instance()->render_products_page();
                        return;
                    }
                    wp_die(esc_html__('付费文章模块未初始化。', 'aksrt'));
                },
            ],
            'download_logs' => [
                'slug'     => 'aksrt_download_logs',
                'title'    => __('下载记录', 'aksrt'),
                'callback' => static function (): void {
                    if (class_exists('AKSRT\\Admin\\Native\\PayDownloadLogs')) {
                        PayDownloadLogs::get_instance()->render_page();
                        return;
                    }
                    wp_die(esc_html__('下载记录模块未初始化。', 'aksrt'));
                },
            ],
            'coupons' => [
                'slug'     => 'aksrt_coupons',
                'title'    => __('优惠码', 'aksrt'),
                'callback' => static function (): void {
                    if (class_exists('AKSRT\\Admin\\Native\\PayCoupons')) {
                        PayCoupons::get_instance()->render_page();
                        return;
                    }
                    wp_die(esc_html__('优惠码模块未初始化。', 'aksrt'));
                },
            ],
            'charge_cards' => [
                'slug'     => 'aksrt_charge_cards',
                'title'    => __('卡密管理', 'aksrt'),
                'callback' => static function (): void {
                    if (class_exists('AKSRT\\Admin\\Native\\PayChargeCards')) {
                        PayChargeCards::get_instance()->render_charge_cards_page();
                        return;
                    }
                    wp_die(esc_html__('卡密模块未初始化。', 'aksrt'));
                },
            ],
            'income' => [
                'slug'     => 'aksrt_income',
                'title'    => __('创作分成', 'aksrt'),
                'callback' => static function (): void {
                    if (class_exists('AKSRT\\Admin\\Native\\PayIncome')) {
                        PayIncome::get_instance()->render_income_page();
                        return;
                    }
                    wp_die(esc_html__('分成模块未初始化。', 'aksrt'));
                },
            ],
            'rebate' => [
                'slug'     => 'aksrt_rebate',
                'title'    => __('推广返佣', 'aksrt'),
                'callback' => static function (): void {
                    if (class_exists('AKSRT\\Admin\\Native\\PayRebate')) {
                        PayRebate::get_instance()->render_rebate_page();
                        return;
                    }
                    wp_die(esc_html__('返佣模块未初始化。', 'aksrt'));
                },
            ],
            'withdraw' => [
                'slug'     => 'aksrt_withdraw',
                'title'    => __('提现审核', 'aksrt'),
                'callback' => static function (): void {
                    if (class_exists('AKSRT\\Admin\\Native\\PayWithdrawals')) {
                        PayWithdrawals::get_instance()->render_withdrawals_page();
                        return;
                    }
                    wp_die(esc_html__('提现模块未初始化。', 'aksrt'));
                },
            ],
        ];
    }

    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 $page) {
            add_submenu_page(
                self::MENU_SLUG,
                $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\Payment\Withdrawal')) {
            $pending = (int) \AKSRT\Payment\Withdrawal::get_instance()->get_count(['status' => \AKSRT\Payment\Withdrawal::STATUS_PENDING]);
            if ($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>';
            }
        }
    }

    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>';
    }

    private function render_footer(): void {
        echo '</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\Payment\OrderRepository')
            ? \AKSRT\Payment\OrderRepository::get_instance()->get_stats()
            : [];
        $withdraw_stats = class_exists('\AKSRT\Payment\Withdrawal')
            ? \AKSRT\Payment\Withdrawal::get_instance()->get_stats()
            : [];
        $card_stats = class_exists('\AKSRT\Payment\ChargeCard')
            ? \AKSRT\Payment\ChargeCard::get_instance()->get_stats()
            : [];

        echo '<p class="description">' . esc_html__('运营数据入口。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>';
    }
}