<?php
/**
 * AKSRT admin shop variant and export operations.
 *
 * @package AKSRT
 */

defined('ABSPATH') || exit;

trait AKSRT_Admin_Shop_Controller_Variant_Export_Operations {

    public function get_product_variants(WP_REST_Request $request): WP_REST_Response {
        $product_id = (int) $request->get_param('id');
        $product = get_post($product_id);
        if (!$product || $product->post_type !== 'aksrt_product') {
            return $this->error('商品不存在', 404);
        }

        if (!class_exists('AKSRT_Shop')) {
            return $this->success(['data' => ['variants' => []]]);
        }

        $variants = AKSRT_Shop::get_instance()->get_variants($product_id);
        return $this->success(['data' => ['variants' => $variants]]);
    }

    public function save_product_variants(WP_REST_Request $request): WP_REST_Response {
        $product_id = (int) $request->get_param('id');
        $product = get_post($product_id);
        if (!$product || $product->post_type !== 'aksrt_product') {
            return $this->error('商品不存在', 404);
        }

        $params = method_exists($this, 'get_json_params')
            ? $this->get_json_params($request)
            : ($request->get_json_params() ?? []);
        $variants = $params['variants'] ?? [];
        if (!is_array($variants)) {
            return $this->error('变体数据格式错误');
        }

        if (!class_exists('AKSRT_Shop')) {
            return $this->error('商城系统未启用', 501);
        }

        $saved = AKSRT_Shop::get_instance()->save_variants($product_id, $variants);
        return $this->success(['message' => '变体已保存', 'data' => ['variants' => $saved]]);
    }

    public function delete_variant(WP_REST_Request $request): WP_REST_Response {
        $variant_id = (int) $request->get_param('id');

        if (!class_exists('AKSRT_Shop')) {
            return $this->error('商城系统未启用', 501);
        }

        $result = AKSRT_Shop::get_instance()->delete_variant($variant_id);
        if (!$result) {
            return $this->error('删除失败', 500);
        }

        return $this->success(['message' => '变体已删除']);
    }

    public function export_orders(WP_REST_Request $request): WP_REST_Response {
        if (!class_exists('AKSRT_Shop')) {
            return $this->error('商城服务不可用', 500);
        }

        $args = [
            'status'    => sanitize_key((string) $request->get_param('status')),
            'date_from' => sanitize_text_field((string) $request->get_param('date_from')),
            'date_to'   => sanitize_text_field((string) $request->get_param('date_to')),
            'limit'     => max(1, min(5000, (int) ($request->get_param('limit') ?: 1000))),
        ];

        $result = AKSRT_Shop::get_instance()->export_orders_csv($args);

        return new WP_REST_Response($result['csv'], 200, [
            'Content-Type'        => 'text/csv; charset=utf-8',
            'Content-Disposition' => 'attachment; filename="orders-' . date('Ymd-His') . '.csv"',
            'X-Order-Count'       => $result['count'],
        ]);
    }

    public function confirm_receipt(WP_REST_Request $request): WP_REST_Response {
        if (!class_exists('AKSRT_Shop')) {
            return $this->error('商城服务不可用', 500);
        }

        $order_number = sanitize_text_field((string) $request->get_param('order_number'));
        $result = AKSRT_Shop::get_instance()->confirm_receipt(get_current_user_id(), $order_number);
        if (empty($result['success'])) {
            return $this->error($result['message'] ?? '确认收货失败');
        }

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

    public function get_after_sale_reasons(WP_REST_Request $request): WP_REST_Response {
        if (class_exists('AKSRT_After_Sale')) {
            return $this->success(['data' => AKSRT_After_Sale::get_reason_options()]);
        }
        return $this->success(['data' => ['refund' => [], 'return' => []]]);
    }

    public function get_frontend_after_sale_reasons(WP_REST_Request $request): WP_REST_Response {
        if (class_exists('AKSRT_After_Sale')) {
            return $this->success(['data' => AKSRT_After_Sale::get_reason_options()]);
        }
        return $this->success(['data' => ['refund' => [], 'return' => []]]);
    }
}