type Shopify = {

  token: string;

  store_name: string;

};

/**

 * Calculates a refund

 *  Caution For multi-currency orders, the currency property is required whenever the amount property is provided.

 */

export async function main(

  auth: Shopify,

  api_version: string = "2023-10",

  order_id: string,

  body: {

    refund?: {

      refund_line_items?: {

        line_item_id?: number;

        quantity?: number;

        restock_type?: string;

        [k: string]: unknown;

      }[];

      shipping?: { full_refund?: boolean; [k: string]: unknown };

      [k: string]: unknown;

    };

    [k: string]: unknown;

  }

) {

  const url = new URL(

    `https://${auth.store_name}.myshopify.com/admin/api/${api_version}/orders/${order_id}/refunds/calculate.json`

  );

  const response = await fetch(url, {

    method: "POST",

    headers: {

      "Content-Type": "application/json",

      "X-Shopify-Access-Token": auth.token,

    },

    body: JSON.stringify(body),

  });

  if (!response.ok) {

    const text = await response.text();

    throw new Error(`${response.status} ${text}`);

  }

  return await response.json();

}