import {z} from 'zod'

export type GetApiV1ReferralsArgs = {cursor?: (string | null) | undefined};

export type GetApiV1ReferralsOptions = {baseUrl?: string | undefined, oAuth2ClientCredentials?: string | undefined, fetch?: typeof fetch | undefined};

export const referralStatus = z.enum(["UNCLAIMED", "EXPIRED", "ACTIVE", "CLOSED"]);

export const domesticInstruction = z.object({account_type: z.string(), bank_account_number: z.string(), bank_routing_number: z.string(), beneficiary_name: z.string(), beneficiary_address: z.string(), bank_name: z.string(), bank_address: z.string()});

export const internationalInstruction = z.object({account_type: z.string(), swift_account_number: z.string(), swift_bank_number: z.string(), beneficiary_name: z.string(), beneficiary_address: z.string(), bank_name: z.string(), bank_address: z.string(), special_instructions: z.string()});

export const instruction = z.object({domestic: domesticInstruction, international: internationalInstruction});

export const account = z.object({id: z.string(), instructions: instruction.nullable().optional(), created_at: z.string()});

export const applicationStatus = z.enum(["NO_ACCOUNT", "ACTIVE", "NOT_SUBMITTED", "INFORMATION_PENDING", "MANUAL_REVIEW", "PROCESSING", "REJECTED", "CLOSED"]);

export const application = z.object({status: applicationStatus});

export const cash = z.object({accounts: z.array(account).nullable().optional(), application: application});

export const product = z.object({cash: cash});

export const referral = z.object({id: z.string(), referral_signup_url: z.string(), expires_at: z.string(), customer_email: z.string().nullable().optional(), status: referralStatus, products: z.array(product)});

export const referralPage = z.object({next_cursor: z.string().nullable().optional(), items: z.array(referral)});

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
};

/**
 * List referrals
 * 
 * GET /v1/referrals
 */
export const getApiV1Referrals = async (args: GetApiV1ReferralsArgs, options?: GetApiV1ReferralsOptions) => {
const {baseUrl = "https://api.brex.com", fetch: fetchFn = fetch, oAuth2ClientCredentials} = options ?? {}

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

if (args.cursor != null) query.append("cursor", String(args.cursor))
if (oAuth2ClientCredentials !== undefined) headers.set('authorization', `Bearer ${oAuth2ClientCredentials}`)

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