import {z} from 'zod'

export type GetApiBillpayOffersOfferIdBillArgs = {offerId: string, billIdentifier?: string | undefined, accountNumber?: string | undefined};

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

export const dtoPriceType = z.enum(["FIXED", "RANGE"]);

export const dtoBillPayBillResponse = z.object({cost: z.number().int().optional(), costCurrency: z.string().optional(), costCurrencyDivisor: z.number().int().optional(), costFee: z.number().int().optional(), costFeePct: z.number().int().optional(), costFeeTotal: z.number().int().optional(), costTotal: z.number().int().optional(), createdAt: z.string().optional(), price: z.number().int().optional(), priceCurrency: z.string().optional(), priceCurrencyDivisor: z.number().int().optional(), priceFee: z.number().int().optional(), priceFx: z.number().optional(), priceType: dtoPriceType.optional(), send: z.number().int().optional(), sendCurrency: z.string().optional(), sendCurrencyDivisor: z.number().int().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 a BillPay bill for a specific offer
 * 
 * GET /billpay/offers/{offerId}/bill
 */
export const getApiBillpayOffersOfferIdBill = async (args: GetApiBillpayOffersOfferIdBillArgs, options: GetApiBillpayOffersOfferIdBillOptions) => {
const {baseUrl, fetch: fetchFn = fetch, ApiKey} = options ?? {}

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

if (args.billIdentifier != null) query.append("billIdentifier", String(args.billIdentifier))
if (args.accountNumber != null) query.append("accountNumber", String(args.accountNumber))
if (ApiKey !== undefined) headers.set("Authorization", ApiKey)

const url = `${baseUrl.replace(/\/+$/, '')}/billpay/offers/${encodeURIComponent(String(args.offerId))}/bill${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(dtoBillPayBillResponse, await res.json())
};