import {z} from 'zod'

export type GetApiV1CarriersOptions = {baseUrl: string, fetch?: typeof fetch | undefined};

export const carrierDetails = z.object({carrier_name: z.enum(["allied_express", "allied_express_local", "amazon_shipping", "aramex", "asendia_us", "australiapost", "boxknight", "bpost", "canadapost", "canpar", "chronopost", "colissimo", "dhl_express", "dhl_parcel_de", "dhl_poland", "dhl_universal", "dicom", "dpd", "dpdhl", "easypost", "easyship", "eshipper", "fedex", "fedex_ws", "freightcom", "generic", "geodis", "hay_post", "laposte", "locate2u", "nationex", "purolator", "roadie", "royalmail", "sapient", "seko", "sendle", "tge", "tnt", "ups", "usps", "usps_international", "usps_wt", "usps_wt_international", "zoom2u"]), display_name: z.string(), capabilities: z.array(z.string()).optional(), connection_fields: z.record(z.string(), z.unknown()).optional(), config_fields: z.record(z.string(), z.unknown()).optional()});

export const getApiV1CarriersResponse = z.array(carrierDetails);

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
};

/**
 * List all carriers
 * 
 * GET /v1/carriers
 */
export const getApiV1Carriers = async (options: GetApiV1CarriersOptions) => {
const {baseUrl, fetch: fetchFn = fetch} = options ?? {}

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

const url = `${baseUrl.replace(/\/+$/, '')}/v1/carriers${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "GET", headers})

if (!res.ok) throw new Error(`Request failed with status ${res.status}`, {cause: {status: res.status, body: await res.text()}})

return validateResponse(getApiV1CarriersResponse, await res.json())
};