import {z} from 'zod'

export type GetApiV1GlobalPayoutExchangeRatesArgs = {Authorization: string, accountId: string, from: string, to: string, region?: string | undefined};

export type GetApiV1GlobalPayoutExchangeRatesOptions = {baseUrl?: string | undefined, fetch?: typeof fetch | undefined};

export const getApiV1GlobalPayoutExchangeRatesResponse = z.object({code: z.string().optional(), description: z.string().optional(), data: z.object({rates: z.array(z.object({exchangeRateId: z.string().optional(), currencyPairName: z.string().optional(), bidRate: z.string().optional(), askRate: z.string().optional(), midRate: z.string().optional(), createdAt: z.string().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
};

/**
 * Retrieve the latest exchange rates for a currency pair before initiating a transfer.
 * 
 * GET /v1/global-payout/exchange-rates
 */
export const getApiV1GlobalPayoutExchangeRates = async (args: GetApiV1GlobalPayoutExchangeRatesArgs, options?: GetApiV1GlobalPayoutExchangeRatesOptions) => {
const {baseUrl = "https://api.nomba.com", fetch: fetchFn = fetch} = options ?? {}

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

if (args.Authorization != null) headers.set("Authorization", String(args.Authorization))
if (args.accountId != null) headers.set("accountId", String(args.accountId))
if (args.from != null) query.append("from", String(args.from))
if (args.to != null) query.append("to", String(args.to))
if (args.region != null) query.append("region", String(args.region))

const url = `${baseUrl.replace(/\/+$/, '')}/v1/global-payout/exchange-rates${query.size > 0 ? `?${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(getApiV1GlobalPayoutExchangeRatesResponse, await res.json())
};