import {z} from 'zod'

export type PaymentId = string;

export type RefundType = 'full' | 'partial';

export type Reference = string;

export type FullRefundPaymentRequest = {type: RefundType, reference: Reference, webhooks?: {url: string} | undefined};

export type AccountId = string;

export type RefundSplitAccount = {id: AccountId, split: {amount: number}};

export type PartialRefundPaymentRequest = {type: 'full' | 'partial', reference: string, amount: number, splits: {accounts: Array<RefundSplitAccount>}, webhooks?: {url: string} | undefined};

export type RefundPaymentRequest = FullRefundPaymentRequest | PartialRefundPaymentRequest;

export type CreateApiV2PaymentsPaymentIdRefundsArgs = {payment_id: PaymentId, 'Getpaid-Idempotency-Key': string, body: RefundPaymentRequest};

export type CreateApiV2PaymentsPaymentIdRefundsOptions = {baseUrl?: string | undefined, OAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const refundId = z.string().min(30).max(50);

export const refundType = z.enum(["full", "partial"]);

export const refundStatus = z.enum(["initiated", "completed", "declined", "failed"]);

export const reference = z.string().min(1).max(50);

export const createdAt = z.string().min(24).max(24);

export const updatedAt = z.string().min(24).max(24);

export const accountId = z.string().min(30).max(50);

export const refundSplitAccount = z.object({id: accountId, split: z.object({amount: z.number().int()})});

export const fullRefundPaymentResponse = z.object({id: refundId, type: refundType, status: refundStatus, reference: reference, created_at: createdAt, updated_at: updatedAt, amount: z.number().int(), splits: z.object({accounts: z.array(refundSplitAccount)})});

export const partialRefundPaymentResponse = z.object({id: refundId, type: refundType, status: refundStatus, reference: reference, created_at: createdAt, updated_at: updatedAt});

export const refundPaymentResponse = z.discriminatedUnion("type", [fullRefundPaymentResponse, partialRefundPaymentResponse]);

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 /v2/payments/{payment_id}/refunds
 */
export const createApiV2PaymentsPaymentIdRefunds = async (args: CreateApiV2PaymentsPaymentIdRefundsArgs, options?: CreateApiV2PaymentsPaymentIdRefundsOptions) => {
const {baseUrl = "https://api.getpaid.io", fetch: fetchFn = fetch, OAuth} = options ?? {}

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

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

const url = `${baseUrl.replace(/\/+$/, '')}/v2/payments/${encodeURIComponent(String(args.payment_id))}/refunds${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(refundPaymentResponse, await res.json())
};