/**
 * Stores and runs atoms for one reactive runtime.
 *
 * An `AtomRegistry` evaluates atoms, caches their current values, tracks
 * dependencies, applies writes and refreshes, manages subscriptions, and
 * disposes unused nodes. Each registry is independent, so the same atom can hold
 * different values in different registries. Serializable atom values can also be
 * preloaded before the first read.
 *
 * @stability unstable
 * @since 4.0.0
 */
import * as Context from "../Context.ts";
import * as Effect from "../Effect.ts";
import * as Layer from "../Layer.ts";
import * as Option from "../Option.ts";
import type { Scheduler } from "../Scheduler.ts";
import * as Scope from "../Scope.ts";
import * as Stream from "../Stream.ts";
import * as Result from "./AsyncResult.ts";
import type * as Atom from "./Atom.ts";
/**
 * The literal type used to identify `AtomRegistry` services and values.
 *
 * @stability unstable
 * @category type IDs
 * @since 4.0.0
 */
export type TypeId = "~effect/reactivity/AtomRegistry";
/**
 * The runtime type id used to identify `AtomRegistry` services and values.
 *
 * @stability unstable
 * @category type IDs
 * @since 4.0.0
 */
export declare const TypeId: TypeId;
/**
 * Returns `true` when the value has the `AtomRegistry` type id.
 *
 * @stability unstable
 * @category guards
 * @since 4.0.0
 */
export declare const isAtomRegistry: (u: unknown) => u is AtomRegistry;
/**
 * The runtime registry that stores atom nodes and coordinates reads, writes,
 * refreshes, subscriptions, and disposal.
 *
 * **Details**
 *
 * It also manages scheduler configuration, serializable preloaded values, and node
 * addition/removal callbacks.
 *
 * @stability unstable
 * @category models
 * @since 4.0.0
 */
export interface AtomRegistry {
    readonly [TypeId]: TypeId;
    readonly scheduler: Scheduler;
    readonly schedulerAsync: Scheduler;
    readonly getNodes: () => ReadonlyMap<Atom.Atom<any> | string, Node<any>>;
    readonly ensureNode: <A>(atom: Atom.Atom<A>) => Node<A>;
    readonly get: <A>(atom: Atom.Atom<A>) => A;
    readonly mount: <A>(atom: Atom.Atom<A>) => () => void;
    readonly refresh: <A>(atom: Atom.Atom<A>) => void;
    readonly set: <R, W>(atom: Atom.Writable<R, W>, value: W) => void;
    readonly setSerializable: (key: string, encoded: unknown) => void;
    readonly preloadedSerializable: Map<string, unknown>;
    readonly modify: <R, W, A>(atom: Atom.Writable<R, W>, f: (_: R) => [returnValue: A, nextValue: W]) => A;
    readonly update: <R, W>(atom: Atom.Writable<R, W>, f: (_: R) => W) => void;
    readonly subscribe: <A>(atom: Atom.Atom<A>, f: (_: A) => void, options?: {
        readonly immediate?: boolean;
    }) => () => void;
    readonly reset: () => void;
    readonly dispose: () => void;
    scheduleNodeRemoval(node: Node<any>): void;
    onNodeAdded?: ((node: Node<any>) => void) | undefined;
    onNodeRemoved?: ((node: Node<any>) => void) | undefined;
}
/**
 * A registry node for a single atom.
 *
 * **Details**
 *
 * Nodes expose the current value, parent and child dependency links, listener set,
 * and current lifecycle state.
 *
 * @stability unstable
 * @category models
 * @since 4.0.0
 */
export interface Node<A> {
    readonly atom: Atom.Atom<A>;
    readonly value: () => A;
    readonly valueOption: () => Option.Option<A>;
    readonly canBeRemoved: boolean;
    parents: Set<Node<any>>;
    children: Set<Node<any>>;
    listeners: Set<() => void>;
    currentState(): "uninitialized" | "stale" | "valid" | "removed";
    setInitialValue(value: A): void;
    subscribe(listener: () => void): () => void;
}
/**
 * Creates an `AtomRegistry`.
 *
 * **Details**
 *
 * Options can preload initial atom values, provide a custom task scheduler,
 * configure timeout bucket resolution, and set a default idle time-to-live for
 * unused atoms.
 *
 * @stability unstable
 * @category constructors
 * @since 4.0.0
 */
export declare const make: (options?: {
    readonly initialValues?: Iterable<readonly [Atom.Atom<any>, any, Atom.InitialValueOptions?]> | undefined;
    readonly scheduleTask?: ((f: () => void) => () => void) | undefined;
    readonly timeoutResolution?: number | undefined;
    readonly defaultIdleTTL?: number | undefined;
} | undefined) => AtomRegistry;
/**
 * Service tag for the active atom runtime cache.
 *
 * **When to use**
 *
 * Use to access or provide the registry that stores atom values,
 * dependencies, subscriptions, and disposal state for a reactive lifetime.
 *
 * @stability unstable
 * @category services
 * @since 4.0.0
 */
export declare const AtomRegistry: Context.Service<AtomRegistry, AtomRegistry>;
/**
 * Creates a layer that provides an `AtomRegistry` configured with the supplied
 * options.
 *
 * **Details**
 *
 * The registry is disposed when the layer scope is finalized.
 *
 * @stability unstable
 * @category layers
 * @since 4.0.0
 */
export declare const layerOptions: (options?: {
    readonly initialValues?: Iterable<readonly [Atom.Atom<any>, any, Atom.InitialValueOptions?]> | undefined;
    readonly scheduleTask?: ((f: () => void) => () => void) | undefined;
    readonly timeoutResolution?: number | undefined;
    readonly defaultIdleTTL?: number | undefined;
}) => Layer.Layer<AtomRegistry>;
/**
 * The default layer that provides a fresh `AtomRegistry`.
 *
 * @stability unstable
 * @category layers
 * @since 4.0.0
 */
export declare const layer: Layer.Layer<AtomRegistry>;
/**
 * Converts an atom in this registry into a stream.
 *
 * **Details**
 *
 * The stream emits the current value immediately, emits subsequent changes, and
 * unsubscribes from the registry when the stream scope closes.
 *
 * @stability unstable
 * @category converting
 * @since 4.0.0
 */
export declare const toStream: {
    /**
     * Converts an atom in this registry into a stream.
     *
     * **Details**
     *
     * The stream emits the current value immediately, emits subsequent changes, and
     * unsubscribes from the registry when the stream scope closes.
     *
     * @stability unstable
     * @category converting
     * @since 4.0.0
     */
    <A>(atom: Atom.Atom<A>): (self: AtomRegistry) => Stream.Stream<A>;
    /**
     * Converts an atom in this registry into a stream.
     *
     * **Details**
     *
     * The stream emits the current value immediately, emits subsequent changes, and
     * unsubscribes from the registry when the stream scope closes.
     *
     * @stability unstable
     * @category converting
     * @since 4.0.0
     */
    <A>(self: AtomRegistry, atom: Atom.Atom<A>): Stream.Stream<A>;
};
/**
 * Converts an `AsyncResult` atom in this registry into a stream of successful
 * values.
 *
 * **Details**
 *
 * Initial results are skipped, failures fail the stream with their cause, and
 * duplicate stream values are dropped with `Stream.changes`.
 *
 * @stability unstable
 * @category converting
 * @since 4.0.0
 */
export declare const toStreamResult: {
    /**
     * Converts an `AsyncResult` atom in this registry into a stream of successful
     * values.
     *
     * **Details**
     *
     * Initial results are skipped, failures fail the stream with their cause, and
     * duplicate stream values are dropped with `Stream.changes`.
     *
     * @stability unstable
     * @category converting
     * @since 4.0.0
     */
    <A, E>(atom: Atom.Atom<Result.AsyncResult<A, E>>): (self: AtomRegistry) => Stream.Stream<A, E>;
    /**
     * Converts an `AsyncResult` atom in this registry into a stream of successful
     * values.
     *
     * **Details**
     *
     * Initial results are skipped, failures fail the stream with their cause, and
     * duplicate stream values are dropped with `Stream.changes`.
     *
     * @stability unstable
     * @category converting
     * @since 4.0.0
     */
    <A, E>(self: AtomRegistry, atom: Atom.Atom<Result.AsyncResult<A, E>>): Stream.Stream<A, E>;
};
/**
 * Reads an `AsyncResult` atom from this registry as an effect.
 *
 * **Details**
 *
 * The effect waits for the result to leave `Initial`, and also waits through
 * waiting results when `suspendOnWaiting` is enabled.
 *
 * @stability unstable
 * @category converting
 * @since 4.0.0
 */
export declare const getResult: {
    /**
     * Reads an `AsyncResult` atom from this registry as an effect.
     *
     * **Details**
     *
     * The effect waits for the result to leave `Initial`, and also waits through
     * waiting results when `suspendOnWaiting` is enabled.
     *
     * @stability unstable
     * @category converting
     * @since 4.0.0
     */
    <A, E>(atom: Atom.Atom<Result.AsyncResult<A, E>>, options?: {
        readonly suspendOnWaiting?: boolean | undefined;
    }): (self: AtomRegistry) => Effect.Effect<A, E>;
    /**
     * Reads an `AsyncResult` atom from this registry as an effect.
     *
     * **Details**
     *
     * The effect waits for the result to leave `Initial`, and also waits through
     * waiting results when `suspendOnWaiting` is enabled.
     *
     * @stability unstable
     * @category converting
     * @since 4.0.0
     */
    <A, E>(self: AtomRegistry, atom: Atom.Atom<Result.AsyncResult<A, E>>, options?: {
        readonly suspendOnWaiting?: boolean | undefined;
    }): Effect.Effect<A, E>;
};
/**
 * Mounts an atom in this registry for the lifetime of the current scope.
 *
 * **Details**
 *
 * The atom is subscribed with a no-op listener and the subscription is released
 * when the scope finalizer runs.
 *
 * @stability unstable
 * @category converting
 * @since 4.0.0
 */
export declare const mount: {
    /**
     * Mounts an atom in this registry for the lifetime of the current scope.
     *
     * **Details**
     *
     * The atom is subscribed with a no-op listener and the subscription is released
     * when the scope finalizer runs.
     *
     * @stability unstable
     * @category converting
     * @since 4.0.0
     */
    <A>(atom: Atom.Atom<A>): (self: AtomRegistry) => Effect.Effect<void, never, Scope.Scope>;
    /**
     * Mounts an atom in this registry for the lifetime of the current scope.
     *
     * **Details**
     *
     * The atom is subscribed with a no-op listener and the subscription is released
     * when the scope finalizer runs.
     *
     * @stability unstable
     * @category converting
     * @since 4.0.0
     */
    <A>(self: AtomRegistry, atom: Atom.Atom<A>): Effect.Effect<void, never, Scope.Scope>;
};
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