import {z} from 'zod'

export type GetApiV2RefTimezonesOptions = {baseUrl?: string | undefined, XAuthToken?: string | undefined, fetch?: typeof fetch | undefined};

export const getApiV2RefTimezonesResponse = z.record(z.string(), z.array(z.enum(["US/Samoa", "US/Hawaii", "US/Alaska", "US/Pacific", "US/Arizona", "US/Mountain", "US/Central", "US/Eastern", "America/St_Thomas", "Canada/Pacific", "Canada/Mountain", "Canada/Central", "Canada/Eastern", "Canada/Atlantic", "Canada/Newfoundland"])));

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
};

/**
 * TimeZone List
 * 
 * GET /v2/ref/timezones
 */
export const getApiV2RefTimezones = async (options?: GetApiV2RefTimezonesOptions) => {
const {baseUrl = "https://api.alianza.com", fetch: fetchFn = fetch, XAuthToken} = options ?? {}

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

if (XAuthToken !== undefined) headers.set("X-AUTH-TOKEN", XAuthToken)

const url = `${baseUrl.replace(/\/+$/, '')}/v2/ref/timezones${query.size > 0 ? `?${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(getApiV2RefTimezonesResponse, await res.json())
};