import {
    AsyncErrorCallback,
    RepeatWorker
} from "../interfaces";

import {
    once
} from "../common";

/**
 * This method will executes a loop body for N times, or until it meets a
 * failure.
 */
export function repeat<E>(
    times: number,
    loopBody: RepeatWorker<E>,
    final?: AsyncErrorCallback<E>
): void {

    let loop = function(i: number): void {

        if (i >= times) {

            final && final();
            return;
        }

        loopBody(once(function(err?: E): void {

            if (err !== null && err !== undefined) {

                final && final(err);
            }
            else {

                loop(i + 1);
            }
        }), i);
    };

    loop(0);
}