import {z} from 'zod'

export type RefundRequest = {transaction_id: string, type: string, refund_processed_at?: number | undefined, line_items?: (Array<{reference_product_id?: string | undefined, reference_line_item_id?: string | undefined, sales_amount_refunded?: number | undefined, quantity?: number | undefined, tax_amount_refunded?: number | undefined}>) | undefined};

export type CreateApiTaxRefundsArgs = {body: RefundRequest};

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

export const refundTransactionLineItem = z.object({product: z.object({reference_product_name: z.string().optional(), reference_line_item_id: z.string().optional(), reference_product_id: z.string().optional(), product_tax_code: z.string().optional()}).optional(), tax_jurisdictions: z.array(z.object({tax_rate: z.number().optional(), tax_due_decimal: z.number().optional(), rate_type: z.string().optional(), fee_amount: z.number().optional(), tax_authority_name: z.string().optional(), tax_authority_type: z.string().optional(), tax_type: z.string().optional()}).nullable()).optional(), quantity: z.number().optional(), tax_amount: z.number().optional(), amount_excluding_tax: z.number().optional(), amount_including_tax: z.number().optional()});

export const refundResponse = z.object({id: z.string().optional(), object: z.string().optional(), refund_type: z.string().optional(), testmode: z.boolean().optional(), refund_processed_at: z.number().optional(), line_items: z.array(refundTransactionLineItem).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
};

/**
 * Add a refund to a transaction
 * 
 * POST /tax/refunds
 */
export const createApiTaxRefunds = async (args: CreateApiTaxRefundsArgs, options?: CreateApiTaxRefundsOptions) => {
const {baseUrl = "https://api.numeralhq.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 (bearerAuth !== undefined) headers.set('authorization', `Bearer ${bearerAuth}`)

const url = `${baseUrl.replace(/\/+$/, '')}/tax/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())
};