export type CreateApiOauth2TokenArgs = {body: {grant_type?: string | undefined, client_id?: string | undefined, client_secret?: string | undefined}};

export type CreateApiOauth2TokenOptions = {baseUrl?: string | undefined, oauth2?: string | undefined, fetch?: typeof fetch | undefined};

/**
 * Authenticate
 * 
 * POST /oauth2/token
 */
export const createApiOauth2Token = async (args: CreateApiOauth2TokenArgs, options?: CreateApiOauth2TokenOptions) => {
const {baseUrl = "https://api.datavant.io/v2", fetch: fetchFn = fetch, oauth2} = options ?? {}

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

if (oauth2 !== undefined) headers.set('authorization', `Bearer ${oauth2}`)

const url = `${baseUrl.replace(/\/+$/, '')}/oauth2/token${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "POST", headers, body: JSON.stringify(args.body)})

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
};