import { Order } from '../ballots.js';
import { Attribution, HasNSeats } from './base.js';
import '@gouvernathor/python/collections';

/**
 * Creates an attribution method in which the party with the least votes is eliminated,
 * and its votes are redistributed to the other parties according to the voters' preferences.
 * Repeats until a party reaches a majority of the remaining votes, winning all the seats.
 *
 * The ballots are not required to rank all the candidates.
 */
declare function instantRunoff<Party>({ nSeats }: {
    nSeats: number;
}): Attribution<Party, Order<Party>> & HasNSeats;
/**
 * Creates an attribution method in which each party receives points according
 * to the position it occupies on each ballot, and the party with the most points wins all the seats.
 *
 * Uses the Modified Borda Count, in which the least-ranked candidate gets 1 point,
 * and unranked candidates get 0 points.
 * So, the ballots are not required to rank all the candidates.
 */
declare function bordaCount<Party>({ nSeats }: {
    nSeats: number;
}): Attribution<Party, Order<Party>> & HasNSeats;
/**
 * Creates an attribution method in which each party is matched against each other party,
 * and the party winning each of its matchups wins all the seats.
 * If no party wins against all others, the attribution fails.
 *
 * Doesn't support candidates with equal ranks, due to the Order type format.
 * This implementation also doesn't support incomplete ballots.
 *
 * @param contingency An optional contingency attribution method to use in case of a standoff.
 * If not provided (or null), the attribution will fail with a condorcet.Standoff error,
 * which is a subclass of AttributionFailure.
 */
declare function condorcet<Party>({ nSeats, contingency }: {
    nSeats: number;
    contingency?: Attribution<Party, Order<Party>> | null;
}): Attribution<Party, Order<Party>> & HasNSeats;
declare namespace condorcet {
    var Standoff: {
        new (message?: string): {
            name: string;
            message: string;
            stack?: string;
            cause?: unknown;
        };
        new (message?: string, options?: ErrorOptions): {
            name: string;
            message: string;
            stack?: string;
            cause?: unknown;
        };
    };
}

export { bordaCount, condorcet, instantRunoff };