export type UsageRecord = {recordDate?: string | undefined, amount?: number | undefined};

export type UnitUsageRecord = {unitType?: string | undefined, usageRecords?: Array<UsageRecord> | undefined};

export type SubscriptionUsageRecord = {subscriptionId: string, trackingId?: string | undefined, unitUsageRecords: Array<UnitUsageRecord>};

export type CreateApi10KbUsagesArgs = {'X-Killbill-CreatedBy': string, 'X-Killbill-Reason'?: string | undefined, 'X-Killbill-Comment'?: string | undefined, body: SubscriptionUsageRecord};

export type CreateApi10KbUsagesOptions = {baseUrl: string, basicAuth?: {username: string, password: string} | undefined, fetch?: typeof fetch | undefined};

/**
 * Record usage for a subscription
 * 
 * POST /1.0/kb/usages
 * 
 * Also accepts auth: Killbill_Api_Key, Killbill_Api_Secret
 */
export const createApi10KbUsages = async (args: CreateApi10KbUsagesArgs, options: CreateApi10KbUsagesOptions) => {
const {baseUrl, fetch: fetchFn = fetch, basicAuth} = options ?? {}

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

if (args['X-Killbill-CreatedBy'] != null) headers.set("X-Killbill-CreatedBy", String(args['X-Killbill-CreatedBy']))
if (args['X-Killbill-Reason'] != null) headers.set("X-Killbill-Reason", String(args['X-Killbill-Reason']))
if (args['X-Killbill-Comment'] != null) headers.set("X-Killbill-Comment", String(args['X-Killbill-Comment']))
if (basicAuth !== undefined) headers.set('authorization', `Basic ${btoa(`${basicAuth.username}:${basicAuth.password}`)}`)

const url = `${baseUrl.replace(/\/+$/, '')}/1.0/kb/usages${query.size > 0 ? `?${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 undefined
};