import { Observable } from "rxjs";
import type { ICommand } from "./command.model";
import { Injector, type Signal } from "@angular/core";
export type ExecuteFn = (...args: any[]) => unknown;
export type ExecuteAsyncFn = (...args: any[]) => Observable<unknown> | Promise<unknown>;
export type CanExecute = (() => boolean) | Signal<boolean> | Observable<boolean>;
export interface CommandCreateOptions {
    isAsync: boolean;
    injector?: Injector;
}
/** Creates an async {@link Command}. Must be used within an injection context.
 * NOTE: this auto injects `DestroyRef` and handles auto destroy. {@link ICommand.autoDestroy} should not be used.
 */
export declare function commandAsync(execute: ExecuteAsyncFn, canExecute$?: CanExecute, opts?: Omit<CommandCreateOptions, "isAsync">): Command;
/** Creates a {@link Command}. Must be used within an injection context.
 * NOTE: this auto injects `DestroyRef` and handles auto destroy. {@link ICommand.autoDestroy} should not be used.
 */
export declare function command(execute: ExecuteFn, canExecute$?: CanExecute, opts?: CommandCreateOptions): Command;
/**
 * Command object used to encapsulate information which is needed to perform an action.
 * @deprecated Use {@link command} or {@link commandAsync} instead for creating instances.
 */
export declare class Command implements ICommand {
    /** Determines whether the command is currently executing, as a snapshot value. */
    get isExecuting(): boolean;
    /** Determines whether the command can execute or not, as a snapshot value. */
    get canExecute(): boolean;
    /** Determines whether the command is currently executing, as an observable. */
    get isExecuting$(): Observable<boolean>;
    /** Determines whether to auto destroy when having 0 subscribers. */
    autoDestroy: boolean;
    /** Determines whether the command can execute or not, as an observable. */
    readonly canExecute$: Observable<boolean>;
    private _isExecuting$;
    private _isExecuting;
    private _canExecute;
    private executionPipe$;
    private isExecuting$$;
    private canExecute$$;
    private executionPipe$$;
    private subscribersCount;
    /**
     * Creates an instance of Command.
     *
     * @param execute Execute function to invoke - use `isAsync: true` when `Observable<any>`.
     * @param canExecute Observable which determines whether it can execute or not.
     * @param isAsync Indicates that the execute function is async e.g. Observable.
     */
    constructor(execute: ExecuteFn, canExecute$?: CanExecute, isAsync?: boolean, injector?: Injector);
    /** Execute function to invoke. */
    execute(...args: unknown[]): void;
    /** Disposes all resources held by subscriptions. */
    destroy(): void;
    subscribe(): void;
    unsubscribe(): void;
    private buildExecutionPipe;
}
/**
 * Async Command object used to encapsulate information which is needed to perform an action,
 * which takes an execute function as Observable/Promise.
 * @deprecated Use {@link commandAsync} instead.
 */
export declare class CommandAsync extends Command {
    constructor(execute: ExecuteAsyncFn, canExecute$?: CanExecute);
}