import {z} from 'zod'

export type GetApiV1VendorsArgs = {query?: string | undefined, country?: string | undefined, limit?: number | undefined};

export type GetApiV1VendorsOptions = {baseUrl?: string | undefined, apiKeyHeader?: string | undefined, fetch?: typeof fetch | undefined};

export const vendorBlock = z.object({prefix_int: z.number().int().optional(), mask_bits: z.union([z.literal(24), z.literal(28), z.literal(36)]).optional(), block_type: z.enum(["MA-L", "MA-M", "MA-S", "IAB", "CID"]).optional(), organization: z.string().optional(), address: z.string().optional(), country: z.string().optional(), is_private: z.boolean().optional(), first_seen_at: z.string().optional(), last_changed_at: z.string().optional()});

export const vendorSearchResult = z.object({total: z.number().int().optional(), blocks: z.array(vendorBlock).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
};

/**
 * Search the registered vendor/block directory
 * 
 * GET /v1/vendors
 * 
 * Also accepts auth: apiKeyQuery
 */
export const getApiV1Vendors = async (args: GetApiV1VendorsArgs, options?: GetApiV1VendorsOptions) => {
const {baseUrl = "https://api.macadress.com", fetch: fetchFn = fetch, apiKeyHeader} = options ?? {}

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

if (args.query != null) query.append("query", String(args.query))
if (args.country != null) query.append("country", String(args.country))
if (args.limit != null) query.append("limit", String(args.limit))
if (apiKeyHeader !== undefined) headers.set('authorization', `Bearer ${apiKeyHeader}`)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/vendors${query.size > 0 ? `?${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(vendorSearchResult, await res.json())
};