import {z} from 'zod'

export type GetApiMatrixClientV1RoomsRoomIdTimestampToEventArgs = {roomId: unknown, ts: number, dir: 'f' | 'b'};

export type GetApiMatrixClientV1RoomsRoomIdTimestampToEventOptions = {baseUrl?: string | undefined, accessTokenQuery?: string | undefined, fetch?: typeof fetch | undefined};

export const getApiMatrixClientV1RoomsRoomIdTimestampToEventResponse = z.object({event_id: z.string(), origin_server_ts: z.number().int()});

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 the closest event ID to the given timestamp
 * 
 * GET /_matrix/client/v1/rooms/{roomId}/timestamp_to_event
 * 
 * Also accepts auth: accessTokenBearer
 */
export const getApiMatrixClientV1RoomsRoomIdTimestampToEvent = async (args: GetApiMatrixClientV1RoomsRoomIdTimestampToEventArgs, options?: GetApiMatrixClientV1RoomsRoomIdTimestampToEventOptions) => {
const {baseUrl = "https://matrix.org", fetch: fetchFn = fetch, accessTokenQuery} = options ?? {}

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

if (args.ts != null) query.append("ts", String(args.ts))
if (args.dir != null) query.append("dir", String(args.dir))
if (accessTokenQuery !== undefined) query.set("access_token", accessTokenQuery)

const url = `${baseUrl.replace(/\/+$/, '')}/_matrix/client/v1/rooms/${encodeURIComponent(String(args.roomId))}/timestamp_to_event${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(getApiMatrixClientV1RoomsRoomIdTimestampToEventResponse, await res.json())
};