import { type Nullable } from "@onerjs/core/types.js";
import { type ConnectionPoint, type RuntimeData } from "../connection/connectionPoint.js";
import { type ConnectionPointType } from "../connection/connectionPointType.js";
import { BaseBlock } from "./baseBlock.js";
/**
 * The aggregate block class is the base class for all blocks that be created from other blocks.
 *
 * It is responsible for managing a hidden chain of smart filter blocks in order and expose them through
 * its own connection points.
 *
 * The internal state is basically a filter itself.
 */
export declare abstract class AggregateBlock extends BaseBlock {
    /**
     * The class name of the block.
     */
    static ClassName: string;
    /**
     * The list of relationships between the internal graph output and the outside ones.
     */
    private readonly _aggregatedOutputs;
    /**
     * The list of relationships between the internal graph inputs and the outside ones.
     */
    private readonly _aggregatedInputs;
    /**
     * Do not override prepareForRuntime for aggregate blocks. It is not supported.
     */
    prepareForRuntime(): never;
    /**
     * @internal
     * Merges the internal graph into the SmartFilter
     */
    _mergeIntoSmartFilter(mergedAggregateBlocks: AggregateBlock[]): void;
    /**
     * @internal
     * Undoes a previous mergeIntoSmartFilter call.
     */
    _unmergeFromSmartFilter(): void;
    /**
     * Registers an input connection from the internal graph as an input of the aggregated graph.
     * @param name - The name of the exposed input connection point
     * @param internalConnectionPoints - The input connection points in the inner graph to wire up to the new subfilter input
     * @param defaultValue - The default value to use for the input connection point
     * @returns the connection point referencing the input block
     */
    protected _registerSubfilterInput<U extends ConnectionPointType>(name: string, internalConnectionPoints: ConnectionPoint<U>[], defaultValue?: Nullable<RuntimeData<U>>): ConnectionPoint<U>;
    /**
     * Registers an output connection point from the internal graph as an output of the aggregated graph.
     * @param name - The name of the exposed output connection point
     * @param internalConnectionPoint - The output connection point in the inner graph to expose as an output on the aggregate block
     * @returns the connection point referencing the output connection point
     */
    protected _registerSubfilterOutput<U extends ConnectionPointType>(name: string, internalConnectionPoint: ConnectionPoint<U>): ConnectionPoint<U>;
}
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