import {z} from 'zod'

export type CreateApiCustomsExciseErnsErnSubscriptionArgs = {ern: string, Accept: 'application/vnd.hmrc.1.0+json'};

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

export const createApiCustomsExciseErnsErnSubscriptionResponse = z.object({boxId: z.string()});

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
};

/**
 * Subscribe an ERN to receive Push/Pull notifications
 * 
 * POST /customs/excise/erns/{ern}/subscription
 */
export const createApiCustomsExciseErnsErnSubscription = async (args: CreateApiCustomsExciseErnsErnSubscriptionArgs, options?: CreateApiCustomsExciseErnsErnSubscriptionOptions) => {
const {baseUrl = "https://test-api.service.hmrc.gov.uk", fetch: fetchFn = fetch, userRestricted} = options ?? {}

const query = new URLSearchParams()
const headers = new Headers()
headers.set('accept', "application/vnd.hmrc.1.0+json")

if (args.Accept != null) headers.set("Accept", String(args.Accept))
if (userRestricted !== undefined) headers.set('authorization', `Bearer ${userRestricted}`)

const url = `${baseUrl.replace(/\/+$/, '')}/customs/excise/erns/${encodeURIComponent(String(args.ern))}/subscription${query.size > 0 ? `?${query}` : ''}`

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

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

return validateResponse(createApiCustomsExciseErnsErnSubscriptionResponse, await res.json())
};