import {z} from 'zod'

export type RefundRequest = {transaction_id: string, terminal_id?: string | undefined, merchant_reference?: string | undefined, amount: number, currency?: string | undefined, basket_transaction_id?: string | undefined};

export type CreateApiPoslinkV2RefundsArgs = {'Idempotency-Key'?: string | undefined, body: RefundRequest};

export type CreateApiPoslinkV2RefundsOptions = {baseUrl?: string | undefined, authorisation?: string | undefined, fetch?: typeof fetch | undefined};

export const amount = z.object({amount: z.number().int().gte(0), currency: z.string()});

export const refundIssuerResult = z.object({approval_code: z.string().optional(), response_code: z.string().optional()});

export const dccResponse = z.object({cardholder_amount: amount, conversion_rate: z.string(), markup: z.string(), ecb_markup: z.string().optional()});

export const refundResponseV3 = z.object({transaction_id: z.string(), refund_amount: amount, status: z.enum(["SUCCESS", "FAILURE", "PENDING"]), transaction_type: z.enum(["REFUND", "REVERSAL"]), status_reason: z.enum(["ACCOUNT_INVALID", "CANNOT_VALIDATE_AUTHENTICATION", "CARD_COUNT_EXCEEDED", "CARD_DECLINED", "CARD_EXPIRED", "CARD_LIMIT_EXCEEDED", "CARD_NOT_ACTIVE", "DISABLED_ACCOUNT", "DO_NOT_HONOR", "ECOM_NEGATIVE_CARD_AUTHENTICATION_VERIFICATION", "EXCEEDS_AMOUNT_LIMIT", "FORMAT_ERROR", "INCORRECT_CARD_AUTHENTICATION", "INSUFFICIENT_FUNDS", "INVALID_CARD_NUMBER", "INVALID_TRANSACTION", "ISSUER_DECLINED", "LOST_OR_STOLEN", "MERCHANT_CONFIGURATION", "PIN_LIMIT_EXCEEDED", "PROCESSOR_UNAVAILABLE", "RESTRICTED_CARD", "SCA_PIN_REQUIRED", "SCA_REQUIRED", "SUSPECTED_FRAUD", "TEMPORARY_ISSUE_RETRY", "TIMEOUT", "TRANSACTION_NOT_ALLOWED", "UNABLE_TO_ROUTE_TRANSACTION", "UNSUPPORTED_ISSUER", "NEGATIVE_BALANCE_LIMIT", "OTHER"]).optional(), card_acceptor_id: z.string(), issuer_result: refundIssuerResult, created_at: z.string().optional(), dcc: dccResponse.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
};

/**
 * Process a refund of a transaction (Poslink V2)
 * 
 * POST /poslink/v2/refunds
 */
export const createApiPoslinkV2Refunds = async (args: CreateApiPoslinkV2RefundsArgs, options?: CreateApiPoslinkV2RefundsOptions) => {
const {baseUrl = "https://api.teya.com", fetch: fetchFn = fetch, authorisation} = 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 (authorisation !== undefined) headers.set('authorization', `Bearer ${authorisation}`)

const url = `${baseUrl.replace(/\/+$/, '')}/poslink/v2/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(refundResponseV3, await res.json())
};