import {z} from 'zod'

export type GetApiSubscriptionsPackageIDArgs = {packageID: string};

export type GetApiSubscriptionsPackageIDOptions = {baseUrl: string, ApiKeyId?: string | undefined, ApiKeySecret?: string | undefined, fetch?: typeof fetch | undefined};

export const eventKindId = z.union([z.literal(0), z.literal(1), z.literal(2), z.literal(4)]);

export const getApiSubscriptionsPackageIDResponse = z.array(z.object({event_kind: eventKindId}));

export const validateResponse = async <Output>(
  schema: {
    readonly '~standard': {
      readonly validate: (value: unknown) => ({ readonly value: Output; readonly issues?: undefined } | { readonly issues: ReadonlyArray<{ readonly message: string; readonly path?: ReadonlyArray<PropertyKey | { readonly key: PropertyKey }> | undefined }> }) | Promise<{ readonly value: Output; readonly issues?: undefined } | { readonly issues: ReadonlyArray<{ readonly message: string; readonly path?: ReadonlyArray<PropertyKey | { readonly key: PropertyKey }> | undefined }> }>
    }
  },
  value: unknown
): Promise<Output> => {
  const result = await schema['~standard'].validate(value)

  if (result.issues !== undefined) {
    const detail = result.issues
      .map(({ message, path }) =>
        path?.length
          ? `${path.map((segment) => String(typeof segment === 'object' ? segment.key : segment)).join('.')}: ${message}`
          : message
      )
      .join('; ')

    throw new Error(`Response does not match the schema: ${detail}`, { cause: { issues: result.issues } })
  }

  return result.value
};

/**
 * Get user's subscriptions for the given package
 * 
 * GET /subscriptions/{packageID}
 */
export const getApiSubscriptionsPackageID = async (args: GetApiSubscriptionsPackageIDArgs, options: GetApiSubscriptionsPackageIDOptions) => {
const {baseUrl, fetch: fetchFn = fetch, ApiKeyId, ApiKeySecret} = options ?? {}

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

if (ApiKeyId !== undefined) headers.set("X-API-KEY-ID", ApiKeyId)
if (ApiKeySecret !== undefined) headers.set("X-API-KEY-SECRET", ApiKeySecret)

const url = `${baseUrl.replace(/\/+$/, '')}/subscriptions/${encodeURIComponent(String(args.packageID))}${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 validateResponse(getApiSubscriptionsPackageIDResponse, await res.json())
};