<?php
/**
 * AKSRT admin shop coupon and gateway operations.
 *
 * @package AKSRT
 */

defined('ABSPATH') || exit;

trait AKSRT_Admin_Shop_Controller_Coupon_Gateway_Operations {

    /**
     * GET /shop/coupons — 优惠券列表
     */
    public function get_coupons(WP_REST_Request $request): WP_REST_Response {
        if (!class_exists('AKSRT_Coupon')) {
            return $this->success(['data' => ['items' => [], 'total' => 0, 'page' => 1, 'total_pages' => 1]]);
        }

        $page     = max(1, (int) $request->get_param('page'));
        $per_page = max(1, min(100, (int) $request->get_param('per_page'))) ?: 20;
        $status   = sanitize_key((string) $request->get_param('status'));
        $search   = sanitize_text_field((string) $request->get_param('search'));

        $result = AKSRT_Coupon::get_instance()->get_list([
            'status' => $status,
            'search' => $search,
            'limit'  => $per_page,
            'offset' => ($page - 1) * $per_page,
        ]);

        return $this->success(['data' => $result]);
    }

    /**
     * POST /shop/coupons — 创建优惠券
     */
    public function create_coupon(WP_REST_Request $request): WP_REST_Response {
        if (!class_exists('AKSRT_Coupon')) {
            return $this->error('优惠券系统未启用', 500);
        }

        $params = $this->get_json_params($request);
        $code = sanitize_text_field((string) ($params['code'] ?? ''));

        if ($code === '') {
            return $this->error('优惠码不能为空');
        }

        $id = AKSRT_Coupon::get_instance()->create($params);

        if ($id > 0) {
            return $this->success([
                'message' => __('优惠券已创建', 'aksrt'),
                'data'    => ['id' => $id],
            ], 201);
        }

        return $this->error(__('创建失败（可能优惠码已存在）', 'aksrt'));
    }

    /**
     * POST /shop/coupons/{id}/disable — 禁用优惠券
     */
    public function disable_coupon(WP_REST_Request $request): WP_REST_Response {
        if (!class_exists('AKSRT_Coupon')) {
            return $this->error('优惠券系统未启用', 500);
        }

        $id = (int) $request->get_param('id');
        if ($id <= 0) {
            return $this->error('参数无效');
        }

        $success = AKSRT_Coupon::get_instance()->disable($id);

        if ($success) {
            return $this->success(['message' => __('优惠券已禁用', 'aksrt')]);
        }
        return $this->error(__('操作失败', 'aksrt'));
    }

    /**
     * GET /shop/gateways — 支付网关状态列表
     */
    public function get_gateways(): WP_REST_Response {
        if (!class_exists('AKSRT_Payment_Gateway')) {
            return $this->success(['data' => ['gateways' => []]]);
        }

        return $this->success([
            'data' => [
                'gateways' => AKSRT_Payment_Gateway::get_instance()->get_status_summary(),
            ],
        ]);
    }
}