export interface PurchaseProduct {
  /**
   * The external product ID.
   *
   * Kept for backward compatibility. When `sku` is not provided, this value
   * is sent as the `sku` of the corresponding `line_items` entry. At least
   * one of `sku` or `extProductId` is required.
   */
  extProductId?: string;
  /**
   * The unit price of the product, including line-level discounts.
   */
  price: number;
  /**
   * The quantity purchased.
   */
  quantity: number;
  /**
   * The product variant or unit name.
   */
  productName?: string;
  /**
   * The SKU (SKU/barcode/GTIN/MPN or external id).
   *
   * When present it takes precedence over `extProductId` on the wire.
   */
  sku?: string;
}

export default interface TrackPurchaseParameters {
  /**
   * A unique identifier for the user's order. Required.
   */
  orderId: string;
  /**
   * The final amount paid, including taxes, shipping, and discounts.
   * Sent as `order_value`.
   *
   * Required for Shopping V2 purchase tracking parity with Web.
   */
  value?: number;
  /**
   * The ISO 4217 currency code of the purchase value.
   *
   * Required for Shopping V2 purchase tracking parity with Web.
   */
  currencyCode?: string;
  /**
   * The country code of the purchase.
   */
  countryCode?: string;

  /**
   * The shipping price of the order.
   */
  shippingPrice?: number;

  /**
   * The items cost before discounts, taxes, and shipping.
   *
   * Required for Shopping V2 purchase tracking parity with Web.
   */
  subtotal?: number;
  /**
   * The total discounts applied to the order. Sent as `total_discounts`.
   */
  totalDiscounts?: number;
  /**
   * The purchased items of the order. Sent as `line_items`.
   *
   * Required (non-empty) for Shopping V2 purchase tracking parity with Web.
   */
  products?: PurchaseProduct[];
  /**
   * Any additional information associated to the purchase.
   * Reserved keys: order_id, order_value, value, currency, country,
   * shipping_price, subtotal, total_discounts, line_items, product.
   * Any values passed in the additionalInfo that use a reserved key will be ignored.
   */
  additionalInfo?: { [key: string]: string };
}