import type { ExtensionPriority } from '@remirror/core-constants';
import type { CustomHandlerKeyList, EmptyShape, GetCustomHandler, GetHandler, GetStatic, HandlerKeyList, IfEmpty, IfHasRequiredProperties, Shape, StaticKeyList } from '@remirror/core-types';
import type { AnyExtensionConstructor, DefaultExtensionOptions } from './';
import type { HandlerKeyOptions } from './base-class';
interface DefaultOptionsProps<Options extends Shape = EmptyShape> {
    /**
     * The default options.
     *
     * All non required options must have a default value provided.
     *
     * Please note that as mentioned in this issue
     * [#624](https://github.com/remirror/remirror/issues/624), partial options
     * can cause trouble when setting a default.
     *
     * If you need to accept `undefined `as an acceptable default option there are
     * two possible ways to resolve this.
     *
     * #### Use `AcceptUndefined`
     *
     * This is the preferred solution and should be used instead of the following
     * `null` union.
     *
     * ```ts
     * import { AcceptUndefined } from 'remirror';
     *
     * interface Options {
     *   optional?: AcceptUndefined<string>;
     * }
     * ```
     *
     * Now when the options are consumed by this decorator there should be no
     * errors when setting the value to `undefined`.
     *
     * #### `null` union
     *
     * If you don't mind using nulls in your code then this might appeal to you.
     *
     * ```ts
     * interface Options {
     *   optional?: string | null;
     * }
     * ```
     *
     * @default {}
     */
    defaultOptions: DefaultExtensionOptions<Options>;
}
interface DefaultPriorityProps {
    /**
     * The default priority for this extension.
     *
     * @default {}
     */
    defaultPriority?: ExtensionPriority;
}
interface StaticKeysProps<Options extends Shape = EmptyShape> {
    /**
     * The list of all keys which are static and can only be set at the start.
     */
    staticKeys: StaticKeyList<Options>;
}
/**
 * This notifies the extension which options are handlers. Handlers typically
 * represent event handlers that are called in response to something happening.
 *
 * An `onChange` option could be a handler. When designing the API I had to
 * consider that often times, you might want to listen to a handler in several
 * places.
 *
 * A limitation of the static and dynamic options is that there is only one
 * value per extension. So if there is a `minValue` option and that min value
 * option is set in the extension then it becomes the value for all consumers of
 * the  extension. Handlers don't have the same expected behaviour. It is
 * generally expected that you should be able to subscribe to an event in
 * multiple places.
 *
 * In order to make this possible with `remirror` the handlers are automatically
 * created based on the handler keys you provide. Each handler is an array and
 * when the handler is called with `this.options.onChange`, each item in the
 * array is called based on the rules provided.
 */
interface HandlerKeysProps<Options extends Shape = EmptyShape> {
    /**
     * The list of the option names which are event handlers.
     */
    handlerKeys: HandlerKeyList<Options>;
    /**
     * Customize how the handler should work.
     *
     * This allows you to decide how the handlers will be composed together.
     * Currently it only support function handlers, but you can tell the extension
     * to exit early when a certain return value is received.
     *
     * ```ts
     * const handlerOptions = { onChange: { earlyReturnValue: true }};
     * ```
     *
     * The above setting means that onChange will exit early as soon as one of the
     * methods returns true.
     */
    handlerKeyOptions?: MappedHandlerKeyOptions<Options>;
}
declare type MappedHandlerKeyOptions<Options extends Shape = EmptyShape> = {
    [Key in keyof GetHandler<Options>]?: HandlerKeyOptions<ReturnType<GetHandler<Options>[Key]>, Parameters<GetHandler<Options>[Key]>>;
} & {
    __ALL__?: HandlerKeyOptions;
};
interface CustomHandlerKeysProps<Options extends Shape = EmptyShape> {
    customHandlerKeys: CustomHandlerKeyList<Options>;
}
export declare type ExtensionDecoratorOptions<Options extends Shape = EmptyShape> = DefaultPriorityProps & IfHasRequiredProperties<DefaultExtensionOptions<Options>, DefaultOptionsProps<Options>, Partial<DefaultOptionsProps<Options>>> & IfEmpty<GetStatic<Options>, Partial<StaticKeysProps<Options>>, StaticKeysProps<Options>> & IfEmpty<GetHandler<Options>, Partial<HandlerKeysProps<Options>>, HandlerKeysProps<Options>> & IfEmpty<GetCustomHandler<Options>, Partial<CustomHandlerKeysProps<Options>>, CustomHandlerKeysProps<Options>> & Partial<Remirror.StaticExtensionOptions>;
/**
 * A decorator for the remirror extension.
 *
 * This adds static properties to the extension constructor.
 */
export declare function extension<Options extends Shape = EmptyShape>(options: ExtensionDecoratorOptions<Options>): <Type extends AnyExtensionConstructor>(ReadonlyConstructor: Type) => Type;
/**
 * @deprecated use `extension` instead.
 */
export declare const extensionDecorator: typeof extension;
export {};