import {z} from 'zod'

export type GetApiValidationBankAccountsCountryCurrencyArgs = {country: string, currency: string, 'account-holder-type'?: ('individual' | 'corporate' | 'government') | undefined, 'payment-network'?: ('local' | 'sepa' | 'fps' | 'ach' | 'fedwire' | 'swift') | undefined};

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

export const bankAccountFields = z.object({sections: z.array(z.object({name: z.string(), fields: z.array(z.object({id: z.string(), section: z.string().optional(), display: z.string(), help_text: z.string().optional(), type: z.string(), required: z.boolean(), validation_regex: z.string().optional(), min_length: z.number().int().optional(), max_length: z.number().int().optional(), allowed_options: z.array(z.object({id: z.string().optional(), display: z.string().optional()})).optional(), dependencies: z.array(z.object({field_id: z.string().optional(), value: z.string().optional()})).optional()})).optional()})).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 bank account field formatting
 * 
 * GET /validation/bank-accounts/{country}/{currency}
 */
export const getApiValidationBankAccountsCountryCurrency = async (args: GetApiValidationBankAccountsCountryCurrencyArgs, options: GetApiValidationBankAccountsCountryCurrencyOptions) => {
const {baseUrl, fetch: fetchFn = fetch, OAuth} = options ?? {}

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

if (args['account-holder-type'] != null) query.append("account-holder-type", String(args['account-holder-type']))
if (args['payment-network'] != null) query.append("payment-network", String(args['payment-network']))
if (OAuth !== undefined) headers.set('authorization', `Bearer ${OAuth}`)

const url = `${baseUrl.replace(/\/+$/, '')}/validation/bank-accounts/${encodeURIComponent(String(args.country))}/${encodeURIComponent(String(args.currency))}${query.size > 0 ? `?${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(bankAccountFields, await res.json())
};