import * as _ from 'lodash';

/**
 * _.zip() that clips to the shortest array.
 */
export function shortZip<T1, T2>(a: T1[], b: T2[]): Array<[T1, T2]> {
    const minLength = Math.min(a.length, b.length);
    return _.zip(a.slice(0, minLength), b.slice(0, minLength)) as Array<[T1, T2]>;
}

/**
 * Replaces the keys in a deeply nested object. Adapted from https://stackoverflow.com/a/39126851
 */
export function replaceKeysDeep(
    obj: Record<string, unknown>,
    mapKeys: (key: string) => string | void,
): _.Dictionary<Record<string, unknown>> {
    return _.transform(obj, (result, value, key) => {
        const currentKey = mapKeys(key) || key;
        result[currentKey] = _.isObject(value)
            ? replaceKeysDeep(value as Record<string, unknown>, mapKeys)
            : (value as Record<string, unknown>);
    });
}