import {z} from 'zod'

export type PaymentInitiationInput = {bankId: string, paymentScheme?: ('SEPA_CREDIT_TRANSFER' | 'MULTIBANCO' | 'DANISH_DOMESTIC_CREDIT_TRANSFER' | 'FASTER_PAYMENTS' | 'BACS' | 'BECS' | 'ACH' | null) | undefined, clientEvidence?: ({fingerprint?: string | undefined, timezone?: string | undefined, checkout_page_version?: string | undefined, payment_terms_agreement_id?: string | undefined, payment_page_url?: string | undefined, authorization_language?: string | undefined}) | undefined} | {customerBankAccountId: string, paymentScheme?: ('SEPA_CREDIT_TRANSFER' | 'MULTIBANCO' | 'DANISH_DOMESTIC_CREDIT_TRANSFER' | 'FASTER_PAYMENTS' | 'BACS' | 'BECS' | 'ACH' | null) | undefined, clientEvidence?: ({fingerprint?: string | undefined, timezone?: string | undefined, checkout_page_version?: string | undefined, payment_terms_agreement_id?: string | undefined, payment_page_url?: string | undefined, authorization_language?: string | undefined}) | undefined};

export type CreateApiApiV1EmbeddedPaymentInitiationArgs = {body: PaymentInitiationInput};

export type CreateApiApiV1EmbeddedPaymentInitiationOptions = {baseUrl?: string | undefined, fetch?: typeof fetch | undefined};

export const paymentInitiationResponse = z.object({success: z.boolean(), data: z.object({order_id: 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
};

/**
 * Initiate a payment for an embedded flow using payment_token (query or body) and selected bank
 * 
 * POST /api/v1/embedded/payment-initiation
 */
export const createApiApiV1EmbeddedPaymentInitiation = async (args: CreateApiApiV1EmbeddedPaymentInitiationArgs, options?: CreateApiApiV1EmbeddedPaymentInitiationOptions) => {
const {baseUrl = "https://core.quidkey.com", fetch: fetchFn = fetch} = options ?? {}

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

const url = `${baseUrl.replace(/\/+$/, '')}/api/v1/embedded/payment-initiation${query.size > 0 ? `?${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(paymentInitiationResponse, await res.json())
};