import {z} from 'zod'

export type GetApiTimeOffStatusArgs = {Authorization: string, _userId: string, _timeOffTypeId: string};

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

export const getApiTimeOffStatusResponse = z.object({_userId: z.string().optional(), _timeOffTypeId: z.string().optional(), timeOffTypeName: z.string().optional(), policyName: z.string().optional(), _policyType: z.enum(["Day", "Hour"]).optional(), unlimitedAllowance: z.boolean().optional(), totalAllowance: z.number().optional(), cycleAllowance: z.number().optional(), prevCycleCarryOver: z.number().optional(), alreadyTaken: z.number().optional(), planned: z.number().optional(), available: z.number().optional(), carryOverEnabled: z.boolean().optional(), plannedFromCarryOver: z.number().optional(), takenFromCarryOver: z.number().optional(), expiredCarryOver: z.number().optional(), carryOverExpiresAt: z.string().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
};

/**
 * Return a list of time-off statuses.
 * 
 * GET /time-off/status
 */
export const getApiTimeOffStatus = async (args: GetApiTimeOffStatusArgs, options?: GetApiTimeOffStatusOptions) => {
const {baseUrl = "https://sandbox-api.kenjo.io/api/v1", fetch: fetchFn = fetch} = options ?? {}

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

if (args.Authorization != null) headers.set("Authorization", String(args.Authorization))
if (args._userId != null) query.append("_userId", String(args._userId))
if (args._timeOffTypeId != null) query.append("_timeOffTypeId", String(args._timeOffTypeId))

const url = `${baseUrl.replace(/\/+$/, '')}/time-off/status${query.size > 0 ? `?${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(getApiTimeOffStatusResponse, await res.json())
};