import {z} from 'zod'

export type ApplicantId = string;

export type GetApiApplicantsApplicantIdArgs = {applicant_id: ApplicantId};

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

export const idvHalLink = z.object({href: z.string()});

export const idvSelfLink = z.object({self: idvHalLink});

export const applicantId = z.string();

export const idvApplicant = z.object({created_on: z.string(), modified_on: z.string(), external_applicant_id: z.string().optional(), email: z.string().optional(), external_applicant_name: z.string().max(255).optional(), _links: idvSelfLink, id: applicantId});

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 applicant
 * 
 * GET /applicants/{applicant_id}
 * 
 * Also accepts auth: ApiSecretKey
 */
export const getApiApplicantsApplicantId = async (args: GetApiApplicantsApplicantIdArgs, options: GetApiApplicantsApplicantIdOptions) => {
const {baseUrl, fetch: fetchFn = fetch, OAuth} = options ?? {}

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

if (OAuth !== undefined) headers.set('authorization', `Bearer ${OAuth}`)

const url = `${baseUrl.replace(/\/+$/, '')}/applicants/${encodeURIComponent(String(args.applicant_id))}${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(idvApplicant, await res.json())
};