import {z} from 'zod'

export type DelegatedPaymentMethodCard = {type: 'card', card_number_type: 'fpan' | 'network_token', number: string, exp_month?: string | undefined, exp_year?: string | undefined, name?: string | undefined, cvc?: string | undefined, cryptogram?: string | undefined, eci_value?: string | undefined, checks_performed?: Array<string> | undefined, iin?: string | undefined, display_card_funding_type?: ('credit' | 'debit' | 'prepaid') | undefined, display_wallet_type?: string | undefined, display_brand?: string | undefined, display_last4?: string | undefined, metadata: {[key: string]: string}};

export type DelegatedPaymentAllowance = {reason: 'one_time', max_amount: number, currency: string, merchant_id: string, checkout_session_id: string, expires_at: string};

export type DelegatedPaymentBillingAddress = {name: string, line_one: string, line_two?: string | undefined, city: string, state?: string | undefined, postal_code: string, country: string};

export type DelegatedPaymentRiskSignal = {type: string, score: number, action: string};

export type DelegatedPaymentRequest = {payment_method: DelegatedPaymentMethodCard, allowance: DelegatedPaymentAllowance, billing_address?: DelegatedPaymentBillingAddress | undefined, risk_signals: Array<DelegatedPaymentRiskSignal>, metadata: {[key: string]: string}};

export type CreateApiAgenticCommerceDelegatePaymentArgs = {Signature: string, Timestamp: string, 'Cko-Idempotency-Key'?: string | undefined, 'API-Version'?: string | undefined, body: DelegatedPaymentRequest};

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

export const delegatedPaymentResponse = z.object({id: z.string(), created: z.string(), metadata: z.record(z.string(), 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
};

/**
 * Create a delegated payment token
 * 
 * POST /agentic_commerce/delegate_payment
 */
export const createApiAgenticCommerceDelegatePayment = async (args: CreateApiAgenticCommerceDelegatePaymentArgs, options: CreateApiAgenticCommerceDelegatePaymentOptions) => {
const {baseUrl, fetch: fetchFn = fetch, ApiSecretKey} = options ?? {}

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

if (args.Signature != null) headers.set("Signature", String(args.Signature))
if (args.Timestamp != null) headers.set("Timestamp", String(args.Timestamp))
if (args['Cko-Idempotency-Key'] != null) headers.set("Cko-Idempotency-Key", String(args['Cko-Idempotency-Key']))
if (args['API-Version'] != null) headers.set("API-Version", String(args['API-Version']))
if (ApiSecretKey !== undefined) headers.set("Authorization", ApiSecretKey)

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