import { AnyVoidFn, PromiseFn, IDictionary } from './common';
import { ArgumentNullError } from './ArgumentNullError';

export const sleep = (time: number) => new Promise(resolve => setTimeout(resolve, time));

const startTimer = (fn: AnyVoidFn, time: number) => {
    const id = setTimeout(fn, time);
    return () => clearTimeout(id);
};

export const timeout = <A, B>(fn: PromiseFn<A, B>, time: number): PromiseFn<A, B> => (a) => {
    return new Promise((resolve, reject) => {
        const stopTimer = startTimer(() => {
            reject(new Error(`Timeout has exceeded ${time}`));
        }, time);

        fn(a).then(value => {
            resolve(value);
            stopTimer();
        }).catch(reject);
    });
};

export const validateForNull = (props: IDictionary<any>) => {
    for (const key of Object.keys(props)) {
        const value = props[key];
        if (!value || Number.isNaN(value)) {
            throw new ArgumentNullError(key, value);
        }
    }
};