import {z} from 'zod'

export type GetApiWhoisNetASAsnArgs = {asn: number, page?: number | undefined, whoissource?: ('arin' | 'ripe' | 'afrinic' | 'apnic' | 'lacnic') | undefined};

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

export const whoisAsnResponse = z.object({net: z.string().optional(), total: z.number().int().optional(), page: z.number().int().optional(), records: z.array(z.object({range: z.string().optional(), id: z.string().optional(), name: z.string().optional(), country: z.string().optional(), org: z.string().optional(), status: z.string().optional(), admin: z.string().optional(), abuse: z.string().optional(), tech: z.string().optional(), maintainer: z.string().optional(), updated: z.string().optional(), source: z.string().optional(), raw: z.string().optional()})).optional()});

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
};

/**
 * Returns the WHOIS information by WHOIS ASN.
 * 
 * GET /whois/net/AS{asn}
 * 
 * Also accepts auth: BearerAuth, ApiKeyAuth
 */
export const getApiWhoisNetASAsn = async (args: GetApiWhoisNetASAsnArgs, options?: GetApiWhoisNetASAsnOptions) => {
const {baseUrl = "https://ipinfo.io", fetch: fetchFn = fetch, BasicAuth} = options ?? {}

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

if (args.page != null) query.append("page", String(args.page))
if (args.whoissource != null) query.append("whoissource", String(args.whoissource))
if (BasicAuth !== undefined) headers.set('authorization', `Basic ${btoa(`${BasicAuth.username}:${BasicAuth.password}`)}`)

const url = `${baseUrl.replace(/\/+$/, '')}/whois/net/AS${encodeURIComponent(String(args.asn))}${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(whoisAsnResponse, await res.json())
};