import {apiRequestCache} from "./cacheManager";
import {LogLevel, logWithLevel} from "./logLevel";

export function checkAllRequestsComplete(): true | (string[]) {

    const cacheEntries = Array.from(apiRequestCache.values())

    const stillRunning = cacheEntries.filter((cache) => undefined === cache.response)

    if (stillRunning.length !== 0) {

        if (typeof document === "undefined" || document === null) {

            throw new Error('document is undefined while waiting for API requests to complete (' + JSON.stringify(cacheEntries) + ')')

        }

        // when requests return emtpy sets in full renders, it may not be possible to track their progress.
        logWithLevel(LogLevel.WARN, undefined, console.warn, 'stillRunning...', stillRunning);

        return stillRunning.map((cache) => cache.requestArgumentsSerialized)

    }

    return true

}