export type GetApiOauthCallbackArgs = {code: string, state: string};

export type GetApiOauthCallbackOptions = {baseUrl: string, fetch?: typeof fetch | undefined};

/**
 * Handle receiving a code from an OAuth flow.
 * 
 * GET /oauth/callback
 */
export const getApiOauthCallback = async (args: GetApiOauthCallbackArgs, options: GetApiOauthCallbackOptions) => {
const {baseUrl, fetch: fetchFn = fetch} = options ?? {}

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

if (args.code != null) query.append("code", String(args.code))
if (args.state != null) query.append("state", String(args.state))

const url = `${baseUrl.replace(/\/+$/, '')}/oauth/callback${query.size > 0 ? `?${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 (await res.json()) as unknown
};