import type { NextApiHandler, NextApiRequest, NextApiResponse } from 'next' import { SaleorConfig, getConfig } from '..' export type SaleorApiHandler< T = any, H extends SaleorHandlers = {}, Options extends {} = {} > = ( req: NextApiRequest, res: NextApiResponse<SaleorApiResponse<T>>, config: SaleorConfig, handlers: H, // Custom configs that may be used by a particular handler options: Options ) => void | Promise<void> export type SaleorHandler<T = any, Body = null> = (options: { req: NextApiRequest res: NextApiResponse<SaleorApiResponse<T>> config: SaleorConfig body: Body }) => void | Promise<void> export type SaleorHandlers<T = any> = { [k: string]: SaleorHandler<T, any> } export type SaleorApiResponse<T> = { data: T | null errors?: { message: string; code?: string }[] } export default function createApiHandler< T = any, H extends SaleorHandlers = {}, Options extends {} = {} >( handler: SaleorApiHandler<T, H, Options>, handlers: H, defaultOptions: Options ) { return function getApiHandler({ config, operations, options, }: { config?: SaleorConfig operations?: Partial<H> options?: Options extends {} ? Partial<Options> : never } = {}): NextApiHandler { const ops = { ...operations, ...handlers } const opts = { ...defaultOptions, ...options } return function apiHandler(req, res) { return handler(req, res, getConfig(config), ops, opts) } } }