import {z} from 'zod'

export type CreateApiCheckoutPaymentsArgs = {'x-pub-key'?: string | undefined, 'x-business-id'?: string | undefined, body: {currency: 'NGN' | 'KES' | 'GHS' | 'UGX' | 'USD' | 'ZMW' | 'XAF' | 'XOF' | 'TZS', amount: number, customer: {name: string, email: string, phoneNumber?: string | undefined}, paymentMethods?: Array<string> | undefined, reference?: string | undefined, feeBearer?: ('customer' | 'business') | undefined, settlementDestination?: 'wallet' | undefined, redirectUrl?: string | undefined, defaultPaymentMethod?: ('bank_transfer' | 'card' | 'payAttitude') | undefined, metadata?: Record<string, never> | undefined, quoteReference?: string | undefined}};

export type CreateApiCheckoutPaymentsOptions = {baseUrl?: string | undefined, sec0?: string | undefined, fetch?: typeof fetch | undefined};

export const createApiCheckoutPaymentsResponse = z.object({status: z.boolean().optional(), message: z.string().optional(), data: z.object({link: z.string().optional(), reference: z.string().optional(), payCode: z.string().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
};

/**
 * Initiate Checkout
 * 
 * POST /checkout/payments
 */
export const createApiCheckoutPayments = async (args: CreateApiCheckoutPaymentsArgs, options?: CreateApiCheckoutPaymentsOptions) => {
const {baseUrl = "https://sandboxapi.fincra.com", fetch: fetchFn = fetch, sec0} = options ?? {}

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

if (args['x-pub-key'] != null) headers.set("x-pub-key", String(args['x-pub-key']))
if (args['x-business-id'] != null) headers.set("x-business-id", String(args['x-business-id']))
if (sec0 !== undefined) headers.set("api-key", sec0)

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