import {z} from 'zod'

export type GetApiV1LinksLinkIdSlotsArgs = {link_id: string, from?: string | undefined, until?: string | undefined};

export type GetApiV1LinksLinkIdSlotsOptions = {baseUrl?: string | undefined, OAuth2?: string | undefined, fetch?: typeof fetch | undefined};

export const linkSlot = z.object({duration: z.number().int(), end_at: z.string(), rank: z.number().int(), start_at: z.string()});

export const linkSlotListResponse = z.array(linkSlot);

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
};

/**
 * Get available time slots
 * 
 * GET /v1/links/{link_id}/slots
 * 
 * Also accepts auth: PersonalAccessToken
 */
export const getApiV1LinksLinkIdSlots = async (args: GetApiV1LinksLinkIdSlotsArgs, options?: GetApiV1LinksLinkIdSlotsOptions) => {
const {baseUrl = "https://api.savvycal.com", fetch: fetchFn = fetch, OAuth2} = options ?? {}

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

if (args.from != null) query.append("from", String(args.from))
if (args.until != null) query.append("until", String(args.until))
if (OAuth2 !== undefined) headers.set('authorization', `Bearer ${OAuth2}`)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/links/${encodeURIComponent(String(args.link_id))}/slots${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(linkSlotListResponse, await res.json())
};