import { WorkflowEngine } from "../workflows/engine.js";
import { type WorkflowRunStore } from "../workflows/store.js";
import type { WorkflowDefinition } from "../workflows/types.js";
import type { ControllerWorkflowScheduler, WorkflowSchedulerRequest, WorkflowSchedulerResult } from "./workflows.js";
export type ResolvedChildWorkflow = {
    workflow: WorkflowDefinition;
    workflowPath?: string;
};
export type WorkflowEngineSchedulerOptions = {
    store: WorkflowRunStore;
    resolveWorkflow: (name: string) => Promise<ResolvedChildWorkflow>;
    createEngine: (request: WorkflowSchedulerRequest) => WorkflowEngine;
    /**
     * Release resources the engine held after its run settles, for example a
     * headless child process. Called once per finished run.
     */
    disposeEngine?: (engine: WorkflowEngine) => Promise<void>;
};
export declare class WorkflowEngineScheduler implements ControllerWorkflowScheduler {
    private readonly options;
    private readonly active;
    constructor(options: WorkflowEngineSchedulerOptions);
    ensure(request: WorkflowSchedulerRequest, signal: AbortSignal, onComplete: (result: WorkflowSchedulerResult) => void): Promise<WorkflowSchedulerResult>;
    waitForIdle(): Promise<void>;
}