import {z} from 'zod'

export type GetApiV1EmployeesEmployeeIdI9AuthorizationArgs = {'X-Gusto-API-Version'?: '2026-06-15' | undefined, employee_id: string};

export type GetApiV1EmployeesEmployeeIdI9AuthorizationOptions = {baseUrl?: string | undefined, CompanyAccessAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const i9Authorization = z.object({uuid: z.string(), form_uuid: z.string().nullable().optional(), version: z.string(), authorization_status: z.enum(["citizen", "noncitizen", "permanent_resident", "alien"]), document_type: z.enum(["uscis_alien_registration_number", "form_i94", "foreign_passport"]).nullable().optional(), has_document_number: z.boolean().nullable().optional(), expiration_date: z.string().nullable().optional(), country: z.string().nullable().optional(), employer_signed: z.boolean(), employee_signed: z.boolean(), additional_info: z.string().nullable().optional(), alt_procedure: z.boolean().nullable().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
};

/**
 * Get an employee's I-9 authorization
 * 
 * GET /v1/employees/{employee_id}/i9_authorization
 */
export const getApiV1EmployeesEmployeeIdI9Authorization = async (args: GetApiV1EmployeesEmployeeIdI9AuthorizationArgs, options?: GetApiV1EmployeesEmployeeIdI9AuthorizationOptions) => {
const {baseUrl = "https://api.gusto-demo.com", fetch: fetchFn = fetch, CompanyAccessAuth} = options ?? {}

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

if (args['X-Gusto-API-Version'] != null) headers.set("X-Gusto-API-Version", String(args['X-Gusto-API-Version']))
if (CompanyAccessAuth !== undefined) headers.set('authorization', `Bearer ${CompanyAccessAuth}`)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/employees/${encodeURIComponent(String(args.employee_id))}/i9_authorization${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(i9Authorization, await res.json())
};