// import { sortingUtils } from '@0xproject/order-utils';
// import { SignedOrder } from '@0xproject/types';
// import { BigNumber } from '@0xproject/utils';
// import * as _ from 'lodash';

// import { ForwarderHelperImplConfig } from '@0xproject/asset-buyer/src/asset_buyer';

// interface SignedOrderWithAmount extends SignedOrder {
//     remainingFillAmount: BigNumber;
// }

// export const forwarderHelperImplConfigUtils = {
//     sortedConfig(config: ForwarderHelperImplConfig): ForwarderHelperImplConfig {
//         const { orders, feeOrders, remainingFillableMakerAssetAmounts, remainingFillableFeeAmounts } = config;
//         // TODO: provide a feeRate to the sorting function to more accurately sort based on the current market for ZRX tokens
//         const orderSorter = (ordersToSort: SignedOrder[]) => {
//             return sortingUtils.sortOrdersByFeeAdjustedRate(ordersToSort);
//         };
//         const sortOrdersResult = sortOrdersAndRemainingFillAmounts(
//             orderSorter,
//             orders,
//             remainingFillableMakerAssetAmounts,
//         );
//         const feeOrderSorter = (ordersToSort: SignedOrder[]) => {
//             return sortingUtils.sortFeeOrdersByFeeAdjustedRate(ordersToSort);
//         };
//         const sortFeeOrdersResult = sortOrdersAndRemainingFillAmounts(
//             feeOrderSorter,
//             feeOrders,
//             remainingFillableFeeAmounts,
//         );
//         return {
//             orders: sortOrdersResult.orders,
//             feeOrders: sortFeeOrdersResult.orders,
//             remainingFillableMakerAssetAmounts: sortOrdersResult.remainingFillAmounts,
//             remainingFillableFeeAmounts: sortFeeOrdersResult.remainingFillAmounts,
//         };
//     },
// };

// type OrderSorter = (orders: SignedOrder[]) => SignedOrder[];

// function sortOrdersAndRemainingFillAmounts(
//     orderSorter: OrderSorter,
//     orders: SignedOrder[],
//     remainingFillAmounts?: BigNumber[],
// ): { orders: SignedOrder[]; remainingFillAmounts?: BigNumber[] } {
//     if (!_.isUndefined(remainingFillAmounts)) {
//         // Bundle orders together with their remainingFillAmounts so that we can sort them together
//         const orderWithAmounts = bundleSignedOrderWithAmounts(orders, remainingFillAmounts);
//         // Sort
//         const sortedOrderWithAmounts = orderSorter(orderWithAmounts) as SignedOrderWithAmount[];
//         // Unbundle after sorting
//         const unbundledSortedOrderWithAmounts = unbundleSignedOrderWithAmounts(sortedOrderWithAmounts);
//         return {
//             orders: unbundledSortedOrderWithAmounts.orders,
//             remainingFillAmounts: unbundledSortedOrderWithAmounts.amounts,
//         };
//     } else {
//         const sortedOrders = orderSorter(orders);
//         return {
//             orders: sortedOrders,
//         };
//     }
// }

// function bundleSignedOrderWithAmounts(orders: SignedOrder[], amounts: BigNumber[]): SignedOrderWithAmount[] {
//     const ordersAndAmounts = _.map(orders, (order, index) => {
//         return {
//             ...order,
//             remainingFillAmount: amounts[index],
//         };
//     });
//     return ordersAndAmounts;
// }

// function unbundleSignedOrderWithAmounts(
//     signedOrderWithAmounts: SignedOrderWithAmount[],
// ): { orders: SignedOrder[]; amounts: BigNumber[] } {
//     const orders = _.map(signedOrderWithAmounts, order => {
//         const { remainingFillAmount, ...rest } = order;
//         return rest;
//     });
//     const amounts = _.map(signedOrderWithAmounts, order => {
//         const { remainingFillAmount } = order;
//         return remainingFillAmount;
//     });
//     return {
//         orders,
//         amounts,
//     };
// }