export type GetApiIpPostalArgs = {ip: string};

export type GetApiIpPostalOptions = {baseUrl?: string | undefined, BasicAuth?: {username: string, password: string} | undefined, fetch?: typeof fetch | undefined};

/**
 * Returns a postal for the selected IP.
 * 
 * GET /{ip}/postal
 * 
 * Also accepts auth: BearerAuth, ApiKeyAuth
 */
export const getApiIpPostal = async (args: GetApiIpPostalArgs, options?: GetApiIpPostalOptions) => {
const {baseUrl = "https://ipinfo.io", fetch: fetchFn = fetch, BasicAuth} = options ?? {}

const query = new URLSearchParams()
const headers = new Headers()
headers.set('accept', "text/plain")

if (BasicAuth !== undefined) headers.set('authorization', `Basic ${btoa(`${BasicAuth.username}:${BasicAuth.password}`)}`)

const url = `${baseUrl.replace(/\/+$/, '')}/${encodeURIComponent(String(args.ip))}/postal${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "GET", headers})

if (!res.ok) throw new Error(`Request failed with status ${res.status}`, {cause: {status: res.status, body: await res.text()}})

return res.text()
};