import {z} from 'zod'

export type RefundType = 'scheduled' | 'instant';

export type MerchantConnectorDetails = {connector_account_details?: (Record<string, never> | null) | undefined, metadata?: (Record<string, never> | null) | undefined};

export type MerchantConnectorDetailsWrap = {creds_identifier: string, encoded_data?: (MerchantConnectorDetails | null) | undefined};

export type StripeSplitRefundRequest = {revert_platform_fee?: (boolean | null) | undefined, revert_transfer?: (boolean | null) | undefined};

export type AdyenSplitType = 'BalanceAccount' | 'AcquiringFees' | 'PaymentFee' | 'AdyenFees' | 'AdyenCommission' | 'AdyenMarkup' | 'Interchange' | 'SchemeFee' | 'Commission' | 'TopUp' | 'Vat';

export type AdyenSplitItem = {amount: number, split_type: AdyenSplitType, account?: (string | null) | undefined, reference: string, description?: (string | null) | undefined};

export type AdyenSplitData = {store?: (string | null) | undefined, split_items: Array<AdyenSplitItem>};

export type XenditSplitSubMerchantData = {for_user_id: string};

export type SplitRefund = {stripe_split_refund: StripeSplitRefundRequest} | {adyen_split_refund: AdyenSplitData} | {xendit_split_refund: XenditSplitSubMerchantData};

export type RefundRequest = {payment_id: string, refund_id?: (string | null) | undefined, merchant_id?: (string | null) | undefined, amount?: (number | null) | undefined, reason?: (string | null) | undefined, refund_type?: (RefundType | null) | undefined, metadata?: (Record<string, never> | null) | undefined, merchant_connector_details?: (MerchantConnectorDetailsWrap | null) | undefined, split_refunds?: (SplitRefund | null) | undefined, all_keys_required?: (boolean | null) | undefined};

export type CreateApiRefundsArgs = {body: RefundRequest};

export type CreateApiRefundsOptions = {baseUrl: string, apiKey?: string | undefined, fetch?: typeof fetch | undefined};

export const refundStatus = z.enum(["succeeded", "failed", "pending", "review"]);

export const stripeSplitRefundRequest = z.object({revert_platform_fee: z.boolean().nullable().optional(), revert_transfer: z.boolean().nullable().optional()});

export const adyenSplitType = z.enum(["BalanceAccount", "AcquiringFees", "PaymentFee", "AdyenFees", "AdyenCommission", "AdyenMarkup", "Interchange", "SchemeFee", "Commission", "TopUp", "Vat"]);

export const adyenSplitItem = z.object({amount: z.number().int(), split_type: adyenSplitType, account: z.string().nullable().optional(), reference: z.string(), description: z.string().nullable().optional()});

export const adyenSplitData = z.object({store: z.string().nullable().optional(), split_items: z.array(adyenSplitItem)});

export const xenditSplitSubMerchantData = z.object({for_user_id: z.string()});

export const splitRefund = z.union([z.object({stripe_split_refund: stripeSplitRefundRequest}), z.object({adyen_split_refund: adyenSplitData}), z.object({xendit_split_refund: xenditSplitSubMerchantData})]);

export const refundResponse = z.object({refund_id: z.string(), payment_id: z.string(), amount: z.number().int().gte(100), currency: z.string(), status: refundStatus, reason: z.string().nullable().optional(), metadata: z.object({}).nullable().optional(), error_message: z.string().nullable().optional(), error_code: z.string().nullable().optional(), unified_code: z.string().nullable().optional(), unified_message: z.string().nullable().optional(), created_at: z.string().nullable().optional(), updated_at: z.string().nullable().optional(), connector: z.string(), profile_id: z.string().nullable().optional(), merchant_connector_id: z.string().nullable().optional(), split_refunds: splitRefund.nullable().optional(), issuer_error_code: z.string().nullable().optional(), issuer_error_message: z.string().nullable().optional(), raw_connector_response: z.string().nullable().optional(), connector_refund_id: z.string().nullable().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
};

/**
 * Refunds - Create
 * 
 * POST /refunds
 */
export const createApiRefunds = async (args: CreateApiRefundsArgs, options: CreateApiRefundsOptions) => {
const {baseUrl, fetch: fetchFn = fetch, apiKey} = options ?? {}

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

if (apiKey !== undefined) headers.set("Authorization", apiKey)

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