import {z} from 'zod'

export type RefundPaymentRequest = {amount?: number | undefined, reason?: string | undefined};

export type CreateApiV1PaymentsPaymentIdRefundArgs = {paymentId: string, 'X-Idempotency-Key': string, body: RefundPaymentRequest};

export type CreateApiV1PaymentsPaymentIdRefundOptions = {baseUrl?: string | undefined, bearerAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const transactionStatus = z.enum(["PENDING", "PROCESSING", "COMPLETED", "FAILED", "CANCELLED", "REFUNDED"]);

export const refund = z.object({id: z.string().optional(), txId: z.string().optional(), amount: z.number().optional(), reason: z.string().nullable().optional(), status: transactionStatus.optional(), processedAt: z.string().optional(), createdAt: z.string().optional()});

export const createApiV1PaymentsPaymentIdRefundResponse = z.object({refund: refund.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
};

/**
 * Refund a payment
 * 
 * POST /v1/payments/{paymentId}/refund
 */
export const createApiV1PaymentsPaymentIdRefund = async (args: CreateApiV1PaymentsPaymentIdRefundArgs, options?: CreateApiV1PaymentsPaymentIdRefundOptions) => {
const {baseUrl = "https://api.yuvexpay.com", fetch: fetchFn = fetch, bearerAuth} = options ?? {}

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

if (args['X-Idempotency-Key'] != null) headers.set("X-Idempotency-Key", String(args['X-Idempotency-Key']))
if (bearerAuth !== undefined) headers.set('authorization', `Bearer ${bearerAuth}`)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/payments/${encodeURIComponent(String(args.paymentId))}/refund${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(createApiV1PaymentsPaymentIdRefundResponse, await res.json())
};