import {z} from 'zod'

export type IsoCurrency = string;

export type OpenBankingMandateCreateRequest = {debtor: {customer_id: string, account_number?: string | undefined, sort_code?: string | undefined, account_name?: string | undefined}, bank_id: string, currency: IsoCurrency, periodic_limit: {per_payment: {maximum_amount: number, currency: IsoCurrency}, day?: ({maximum_amount?: number | undefined, alignment?: ('CALENDAR' | 'CONSENT') | undefined}) | undefined, week?: ({maximum_amount?: number | undefined, alignment?: ('CALENDAR' | 'CONSENT') | undefined}) | undefined, fortnight?: ({maximum_amount?: number | undefined}) | undefined, month?: ({alignment?: ('CALENDAR' | 'CONSENT') | undefined, maximum_amount?: number | undefined}) | undefined, half_year?: ({alignment?: ('CALENDAR' | 'CONSENT') | undefined, maximum_amount?: number | undefined}) | undefined, year?: ({alignment?: ('CALENDAR' | 'CONSENT') | undefined, maximum_amount?: number | undefined}) | undefined}, type: 'SWEEPING' | 'COMMERCIAL', term?: ({start_date?: string | undefined, end_date?: string | undefined}) | undefined, reference?: string | undefined, order_id: string};

export type CreateApiOpenBankingMandatesArgs = {'Company-Id'?: string | undefined, Mid?: string | undefined, body: OpenBankingMandateCreateRequest};

export type CreateApiOpenBankingMandatesOptions = {baseUrl?: string | undefined, token?: string | undefined, fetch?: typeof fetch | undefined};

export const openBankingMandateCreateResponse = z.object({mandate_id: z.string(), auth_url: z.string().optional(), links: z.array(z.object({rel: z.string().optional(), href: z.string().optional()})).optional()}).and(z.record(z.string(), z.unknown()));

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 an open banking mandate
 * 
 * POST /open-banking/mandates
 */
export const createApiOpenBankingMandates = async (args: CreateApiOpenBankingMandatesArgs, options?: CreateApiOpenBankingMandatesOptions) => {
const {baseUrl = "https://test-api.acquired.com/v1", fetch: fetchFn = fetch, token} = options ?? {}

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

if (args['Company-Id'] != null) headers.set("Company-Id", String(args['Company-Id']))
if (args.Mid != null) headers.set("Mid", String(args.Mid))
if (token !== undefined) headers.set('authorization', `Bearer ${token}`)

const url = `${baseUrl.replace(/\/+$/, '')}/open-banking/mandates${query.size > 0 ? `?${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(openBankingMandateCreateResponse, await res.json())
};