import {z} from 'zod'

export type CreatePaymentLink = {name: string, description?: string | undefined, type?: 'One_Time' | undefined, addFeeToTotalCost?: boolean | undefined, settlementCurrency: 'NGN, ZAR, BTC', settlementMethod: 'ONCHAIN' | 'LIGHTNING', speed?: ('slow' | 'medium' | 'fast') | undefined, paymentCurrency: 'NGN, ZAR, BTC', paymentMethods: Array<'BANKTRANSFER, LIGHTNING'>, beneficiary: {onChainAddress?: string | undefined, lnAddress?: string | undefined, lnInvoice?: string | undefined} | {bankAccountNumber: string, bankAccountName: string, bankCode: string, bankName: string} | {bankAccountNumber: string, bankName: string, name: string}, amount: number, callbackUrl?: string | undefined};

export type CreateApiPaymentlinkArgs = {body: CreatePaymentLink};

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

export const paymentLinkResponse = z.object({paymentLink: z.string().optional(), paymentRef: z.string().optional()});

export const createApiPaymentlinkResponse = z.object({status: z.string().optional(), message: z.string().optional(), data: paymentLinkResponse.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
};

/**
 * Create a payment link
 * 
 * POST /paymentlink
 * 
 * Also accepts auth: bearerAuth
 */
export const createApiPaymentlink = async (args: CreateApiPaymentlinkArgs, options?: CreateApiPaymentlinkOptions) => {
const {baseUrl = "https://staging.api.mavapay.co/api/v1", fetch: fetchFn = fetch, ApiKeyAuth} = options ?? {}

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

if (ApiKeyAuth !== undefined) headers.set("X-API-KEY", ApiKeyAuth)

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