import { type OnStateChange, type ResetState, type SetState, type StateMeta } from './state.js';
export type ReadonlyStore<T> = {
    get(): T;
    onChange: OnStateChange<T>;
};
/**
 * A store tracks a value and its changes.
 */
export type Store<T> = ReadonlyStore<T> & {
    set: SetState<T>;
    reset: ResetState;
};
/**
 * The Store Value type.
 */
export type StoreValue<S extends Store<any>> = ReturnType<S['get']>;
/**
 * creates a object style store to track a value and its changes.
 *
 * @param init initial value T
 * @param meta optional meta data for custom logger.
 * @returns { get, set, update, onChange, reset }
 *
 * @example
 * ```ts
 * const store = app.states.createStore(0)
 *
 * store.get() // 0
 * store.set(1) // 1
 * store.update(v => v + 1) // 2
 * store.onChange(v => console.log(v)) // trigger when set or update
 * store.reset() // reset value to the initial value
 * ```
 */
export declare function createStore<T>(value: T, meta?: StateMeta): Store<T>;
/**
 * Convert a store to a readonly store.
 */
export declare function toReadonlyStore<S extends Store<any>>(store: S): S extends Store<infer T> ? ReadonlyStore<T> : never;
//# sourceMappingURL=store.d.ts.map