import {z} from 'zod'

export type SubscriptionReqType = {requestType: 'CREATE' | 'MODIFY' | 'DELETE', format: 'XML' | 'JSON', creditDebitIndicator: 'DBIT' | 'CRDT' | 'BOTH', accountIdentification: string, branchIdentification: string, fromAmount?: string | undefined, toAmount?: string | undefined};

export type CreateApiV1CrdrSubscriptionArgs = {'Content-Type': string, Authorization: string, client_id: string, body: SubscriptionReqType};

export type CreateApiV1CrdrSubscriptionOptions = {baseUrl?: string | undefined, clientCredentials?: string | undefined, fetch?: typeof fetch | undefined};

export const subscriptionResponse = z.object({Info: z.string().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
};

/**
 * Account Notification Subscription Request
 * 
 * POST /v1/crdr/subscription
 */
export const createApiV1CrdrSubscription = async (args: CreateApiV1CrdrSubscriptionArgs, options?: CreateApiV1CrdrSubscriptionOptions) => {
const {baseUrl = "https://tts.apib2b.citi.com/citiconnect/prod/accountstatementservices", fetch: fetchFn = fetch, clientCredentials} = options ?? {}

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

if (args['Content-Type'] != null) headers.set("Content-Type", String(args['Content-Type']))
if (args.Authorization != null) headers.set("Authorization", String(args.Authorization))
if (args.client_id != null) query.append("client_id", String(args.client_id))
if (clientCredentials !== undefined) headers.set('authorization', `Bearer ${clientCredentials}`)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/crdr/subscription${query.size > 0 ? `?${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(subscriptionResponse, await res.json())
};