import { Counter } from '@gouvernathor/python/collections';
import { Simple } from '../ballots.js';

interface DisproportionMetric<Party> {
    (p0: {
        votes: Simple<Party>;
        seats: Counter<Party>;
    }): number;
}
/**
 * Returns the mean value (across all candidates) of the absolute difference
 * between the theoretical, (f)ra(c)tional number of seats and the allocated number of seats.
 * The bigger, the less proportional.
 *
 * Compared to a sum or mean of absolute differences of percentage,
 * this
 */
declare function defaultMetric<Party>({ votes, seats }: {
    votes: Simple<Party>;
    seats: Counter<Party>;
}): number;

export { type DisproportionMetric, defaultMetric };