import {z} from 'zod'

export type GetApiCalendarSummaryArgs = {around: string, consequence: 'allow' | 'first_to_arrive' | 'permit' | 'unlock', elevator_stop_id?: number | undefined, group_id?: number | undefined, lock_id?: number | undefined};

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

export const getApiCalendarSummaryResponse = z.object({events: z.array(z.object({starts_at: z.string(), ends_at: z.string()})).optional(), exceptions: z.array(z.object({starts_at: z.string(), ends_at: z.string()})).optional(), schedules_by_day: z.array(z.object({date: z.string(), schedule_ids: z.array(z.number().int())})).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
};

/**
 * Fetch summary of the events of a scheduleable's schedules
 * 
 * GET /calendar/summary
 * 
 * Also accepts auth: OAuth2
 */
export const getApiCalendarSummary = async (args: GetApiCalendarSummaryArgs, options?: GetApiCalendarSummaryOptions) => {
const {baseUrl = "https://api.kisi.io", fetch: fetchFn = fetch, KisiLogin} = options ?? {}

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

if (args.around != null) query.append("around", String(args.around))
if (args.consequence != null) query.append("consequence", String(args.consequence))
if (args.elevator_stop_id != null) query.append("elevator_stop_id", String(args.elevator_stop_id))
if (args.group_id != null) query.append("group_id", String(args.group_id))
if (args.lock_id != null) query.append("lock_id", String(args.lock_id))
if (KisiLogin !== undefined) headers.set("Authorization", KisiLogin)

const url = `${baseUrl.replace(/\/+$/, '')}/calendar/summary${query.size > 0 ? `?${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(getApiCalendarSummaryResponse, await res.json())
};