import {z} from 'zod'

export type Metadata = Record<string, never>;

export type IssueARefundRequest = {amount: number, channels?: Array<unknown> | undefined, reason?: string | undefined, your_bank_account_id?: string | undefined, metadata?: Metadata | undefined};

export type CreateApiCreditsCreditRefRefundsArgs = {'Idempotency-Key': string, credit_ref: string, body: IssueARefundRequest};

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

export const issueARefundResponse = z.object({data: z.object({ref: z.string(), for_ref: z.string(), debit_ref: z.string(), your_bank_account_id: z.string(), created_at: z.string(), amount: z.number().int(), channels: z.array(z.unknown()).optional(), reason: z.string(), contacts: z.object({source_contact_id: z.string().optional(), target_contact_id: z.string().optional()}).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
};

/**
 * Issue a Refund
 * 
 * POST /credits/{credit_ref}/refunds
 */
export const createApiCreditsCreditRefRefunds = async (args: CreateApiCreditsCreditRefRefundsArgs, options?: CreateApiCreditsCreditRefRefundsOptions) => {
const {baseUrl = "https://api.sandbox.zeptopayments.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['Idempotency-Key'] != null) headers.set("Idempotency-Key", String(args['Idempotency-Key']))
if (bearerAuth !== undefined) headers.set('authorization', `Bearer ${bearerAuth}`)

const url = `${baseUrl.replace(/\/+$/, '')}/credits/${encodeURIComponent(String(args.credit_ref))}/refunds${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(issueARefundResponse, await res.json())
};