import {z} from 'zod'

export type GetApiV1AccountsArgs = {cursor?: (unknown | null) | undefined, page_size?: number | undefined, external_id?: unknown | undefined};

export type GetApiV1AccountsOptions = {baseUrl?: string | undefined, fetch?: typeof fetch | undefined};

export const cursorString = z.object({next: z.string().nullable().optional(), size: z.number().int().gte(0)});

export const accountType = z.enum(["primary", "payment", "virtual"]);

export const wireBankDetails = z.object({account_number: z.string().max(27), routing_number: z.string().max(12)});

export const scanDetails = z.object({account_number: z.string().max(8), sort_code: z.string().max(6)});

export const accountDetailsIdentifier = z.union([z.object({iban: z.string()}), z.object({wire: wireBankDetails}), z.object({scan: scanDetails})]);

export const paymentScheme = z.enum(["uae_fts", "uae_ipp", "swift", "fedwire", "ach", "sepa", "sepa_instant", "faster_payments"]);

export const addressableDetails = z.object({account_details: accountDetailsIdentifier, payment_schemes: z.array(paymentScheme)});

export const currency = z.enum(["AED", "USD", "JOD", "EGP", "SAR", "GBP", "EUR", "HKD", "CNH", "SGD"]);

export const accountStatus = z.enum(["open", "frozen", "closed"]);

export const account = z.object({account_name: z.string().max(140), account_owner: z.string().max(140), account_type: accountType, addressable_details: z.array(addressableDetails), available_balance: z.number().int().gte(0), currency: currency, current_balance: z.number().int().gte(0), customer_id: z.string().nullable().optional(), default_details: accountDetailsIdentifier.nullable().optional(), external_id: z.string().nullable().optional(), id: z.string(), status: accountStatus});

export const listAccountsPagedResponse = z.object({pages: cursorString, results: z.array(account)});

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 all accounts for organisation
 * 
 * GET /v1/accounts
 */
export const getApiV1Accounts = async (args: GetApiV1AccountsArgs, options?: GetApiV1AccountsOptions) => {
const {baseUrl = "https://auth-sandbox.fuse.me", fetch: fetchFn = fetch} = 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 (args.page_size != null) query.append("page_size", String(args.page_size))
if (args.external_id != null) query.append("external_id", String(args.external_id))

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