/** Choosing many: what a pick does to a value, and when the overlay has served its purpose. */
import type { MdyMultiselectMode } from "@modyra/core";
import type { MdyOptionNavigationTarget } from "./keys.js";
import { type MdyKeyOrPress } from "../transitions.js";
export type MdyMultiselectValueIntent<T> = {
    readonly type: "toggle";
    readonly value: T;
} | {
    readonly type: "increment";
    readonly value: T;
} | {
    readonly type: "decrement";
    readonly value: T;
} | {
    readonly type: "clear";
};
/** Pure multiselect value transition using the same loose key semantics as select. */
export declare function multiselectValueTransition<T>(values: readonly T[], intent: MdyMultiselectValueIntent<T>, keyFor?: (value: T) => string): readonly T[];
export type MdyMultiselectOverlayAction = {
    readonly type: "open";
} | {
    readonly type: "close";
    readonly restoreFocus: boolean;
} | {
    readonly type: "search";
    readonly query: string;
} | {
    readonly type: "select";
    readonly optionKey: string;
} | {
    readonly type: "move";
    readonly target: MdyOptionNavigationTarget;
};
/** Canonical multiselect overlay policy. The host only supplies event facts and executes the action. */
export declare function multiselectOverlayAction(input: {
    readonly key: MdyKeyOrPress;
    readonly open: boolean;
    /**
     * What the search box holds, where the kind has one.
     *
     * Still required though nothing reads it today: it is a fact about the moment that a policy
     * deciding what a key means may need again, every caller already passes it, and making it optional
     * would move the published surface for no gain. It stopped being read when Backspace stopped
     * answering with a no-op.
     */
    readonly query: string;
    readonly activeKey: string | null;
}): MdyMultiselectOverlayAction | null;
/** Single-mode closes only when no unselected result remains after the commit. */
export declare function shouldCloseMultiselectOverlay(mode: MdyMultiselectMode, remainingResultCount: number): boolean;
/** ISO date bound policy shared by typed input, calendar selection and future hosts. */