import { type CSSResult } from '../../lit-exports/base-lit-exports.js';
import { type CustomElementTagName } from '../custom-tag-name.js';
import { type CssVars } from './css-vars.js';
import { type PropertyInitMapBase } from './element-properties.js';
import { type HostClassNamesMap, type HostClassesInitMap } from './host-classes.js';
import { type BaseStringName } from './string-names.js';
/**
 * A host class instance to be referenced inside of an element definition's `styles` callback.
 *
 * @category Internal
 */
export type HostClass = {
    selector: CSSResult;
    name: CSSResult;
};
/**
 * Input type for an element definition's `styles` callback.
 *
 * @category Internal
 */
export type StylesCallbackInput<TagName extends CustomElementTagName, HostClassKeys extends BaseStringName<TagName>, CssVarKeys extends BaseStringName<TagName>> = {
    hostClasses: Record<HostClassKeys, HostClass>;
    cssVars: Readonly<CssVars<TagName, CssVarKeys>>;
};
/**
 * The type for an element definition's `styles` callback.
 *
 * @category Internal
 */
export type StylesCallback<TagName extends CustomElementTagName, HostClassKeys extends BaseStringName<TagName>, CssVarKeys extends BaseStringName<TagName>> = (input: StylesCallbackInput<TagName, HostClassKeys, CssVarKeys>) => CSSResult;
/**
 * Creates the input for an element definition's `styles` callback.
 *
 * @category Internal
 */
export declare function createStylesCallbackInput<TagName extends CustomElementTagName, HostClassKeys extends BaseStringName<TagName>, CssVarKeys extends BaseStringName<TagName>>({ hostClassNames, cssVars, }: {
    hostClassNames: HostClassNamesMap<TagName, HostClassKeys>;
    cssVars: Readonly<CssVars<TagName, CssVarKeys>>;
}): StylesCallbackInput<TagName, HostClassKeys, CssVarKeys>;
/**
 * Used inside of an element instance to apply host classes on each render.
 *
 * @category Internal
 */
export declare function applyHostClasses<TagName extends CustomElementTagName, Inputs extends PropertyInitMapBase, State extends PropertyInitMapBase, HostClassKeys extends BaseStringName<TagName>>({ host, hostClassesInit, hostClassNames, state, inputs, }: {
    host: HTMLElement;
    hostClassesInit: Readonly<HostClassesInitMap<TagName, HostClassKeys, Inputs, State>> | undefined;
    hostClassNames: HostClassNamesMap<string, HostClassKeys>;
    state: Readonly<State>;
    inputs: Readonly<Inputs>;
}): void;