import { board } from "./../board";
import { Location, Unit, DiplomacyMap, Board } from "./types";
export declare class Utils {
    /**
     * @param board -
     * @returns The map between powers and the number of supply centers
     */
    static numberOfSupplyCenters<Power>(board: Board<Power>): Map<Power, number>;
    /**
     * @returns True if the province is sea. Sea is a province that only Fleet can enter.
     */
    static isSea<Power>(map: DiplomacyMap<Power>, province: board.Province<Power>): boolean;
    /**
     * @return True if the unit can be ordered "convoy" order.
     */
    static canConvoy<Power>(map: DiplomacyMap<Power>, unit: Unit<Power>): boolean;
    /**
     * @returns The locations that the unit can retreat to.
     */
    static locationsToRetreat<Power>(board: Board<Power>, unit: Unit<Power>, attackedFrom: board.Province<Power>): Set<Location<Power>>;
    /**
     * @param units The set of units that is used for convoy
     */
    static isMovableViaSea<Power>(map: DiplomacyMap<Power>, source: board.Province<Power>, destination: board.Province<Power>, units: Set<Unit<Power>>): boolean;
    /**
     * @returns The location that the unit can move via convoy
     */
    static movableViaConvoyLocationsOf<Power>(board: Board<Power>, unit: Unit<Power>): Set<Location<Power>>;
    /**
     * @returns The locations that the unit can move to (including via convoy).
     */
    static movableLocationsOf<Power>(board: Board<Power>, unit: Unit<Power>): Set<Location<Power>>;
    /**
     * @return The set of locations that can be supported by the unit
     */
    static supportableLocationsOf<Power>(map: DiplomacyMap<Power>, unit: Unit<Power>): Set<Location<Power>>;
    /**
     * @return
     *   The Map between powers and number of buildable units.
     *   If a power should disband some units, this contains negative number
     *   (e.g., It contains -1 if a power has to disband 1 unit).
     */
    static numberOfBuildableUnits<Power>(board: Board<Power>): Map<Power, number>;
}