import {z} from 'zod'

export type BankTokenCountryEnum = 'AT' | 'BE' | 'BG' | 'HR' | 'CY' | 'DK' | 'EE' | 'FI' | 'FR' | 'DE' | 'GR' | 'HU' | 'IS' | 'IE' | 'IT' | 'LV' | 'LT' | 'LU' | 'MT' | 'NL' | 'NO' | 'PL' | 'PT' | 'RO' | 'SK' | 'SI' | 'ES' | 'SE';

export type BankAccessRequest = {accounts?: boolean | undefined, balances?: boolean | undefined, transactions?: boolean | undefined};

export type BankTokenRequest = {lifetime?: number | undefined, country?: (BankTokenCountryEnum | null) | undefined, bank?: (string | null) | undefined, access?: BankAccessRequest | undefined};

export type CreateApiBankTokensArgs = {body: BankTokenRequest};

export type CreateApiBankTokensOptions = {baseUrl?: string | undefined, apiKeyPair?: {username: string, password: string} | undefined, fetch?: typeof fetch | undefined};

export const bankTokenCountryEnum = z.enum(["AT", "BE", "BG", "HR", "CY", "DK", "EE", "FI", "FR", "DE", "GR", "HU", "IS", "IE", "IT", "LV", "LT", "LU", "MT", "NL", "NO", "PL", "PT", "RO", "SK", "SI", "ES", "SE"]);

export const bankAccess = z.object({accounts: z.boolean().optional(), balances: z.boolean().optional(), transactions: z.boolean().optional()});

export const bankToken = z.object({tokenString: z.string(), expiration: z.string(), isValid: z.boolean(), country: bankTokenCountryEnum.nullable().optional(), bank: z.string().max(32).nullable().optional(), access: bankAccess.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
};

/**
 * Generate bank verification token
 * 
 * POST /bank/tokens/
 */
export const createApiBankTokens = async (args: CreateApiBankTokensArgs, options?: CreateApiBankTokensOptions) => {
const {baseUrl = "https://ivs.idenfy.com", fetch: fetchFn = fetch, apiKeyPair} = options ?? {}

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

if (apiKeyPair !== undefined) headers.set('authorization', `Basic ${btoa(`${apiKeyPair.username}:${apiKeyPair.password}`)}`)

const url = `${baseUrl.replace(/\/+$/, '')}/bank/tokens/${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "POST", headers, body: JSON.stringify(args.body)})

if (!res.ok) throw new Error(`Request failed with status ${res.status}`, {cause: {status: res.status, body: await res.text()}})

return validateResponse(bankToken, await res.json())
};