import {z} from 'zod'

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

export const item = z.object({amount: z.string(), available_payment_methods: z.array(z.string()), class_of_payment: z.array(z.string()), description: z.string(), description_identifier: z.string(), kind: z.string()});

export const paymentProvisionalStatus = z.enum(["Paid", "Pending", "Failed"]);

export const cost = z.object({id: z.string().optional(), description: z.string().optional(), etag: z.string(), items: z.array(item), kind: z.string(), links: z.object({resource: z.string(), self: z.string()}), status: paymentProvisionalStatus, company_number: 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
};

/**
 * Fetch details of service charge(s) payable for this application
 * 
 * GET /submission/{submission-id}/payment
 */
export const getApiSubmissionSubmissionIdPayment = async (options: GetApiSubmissionSubmissionIdPaymentOptions) => {
const {baseUrl, fetch: fetchFn = fetch} = options ?? {}

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

const url = `${baseUrl.replace(/\/+$/, '')}/submission/${encodeURIComponent(String(args['submission-id']))}/payment${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(cost, await res.json())
};