import {z} from 'zod'

export type CreateApiSimulateAuthorisationArgs = {'Accept-Version': string, body: {cardID: string, billAmount: number, transactionAmount?: number | undefined, transactionCurrency?: (string | null) | undefined, transactionID?: string | undefined, simulateIncorrectCVV?: boolean | undefined, simulateIncorrectPIN?: boolean | undefined, simulateIncorrectExpiryDate?: boolean | undefined, simulateTimeout?: boolean | undefined, simulateFraud?: boolean | undefined, merchantName?: string | undefined, merchantLocation?: string | undefined, mcc?: string | undefined, acquirerCountry?: (string | null) | undefined}};

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

export const createApiSimulateAuthorisationResponse = z.object({lifecycleEventID: z.string(), id: z.string()});

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
};

/**
 * Simulate authorisation transaction
 * 
 * POST /simulate/authorisation
 */
export const createApiSimulateAuthorisation = async (args: CreateApiSimulateAuthorisationArgs, options?: CreateApiSimulateAuthorisationOptions) => {
const {baseUrl = "https://sandbox.api.caas.reap.global", 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 (args['Accept-Version'] != null) headers.set("Accept-Version", String(args['Accept-Version']))
if (ApiKeyAuth !== undefined) headers.set("x-reap-api-key", ApiKeyAuth)

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