import ProjectInfoItem from "../info/ProjectInfoItem";
import { ProjectInfoSuite } from "../info/IProjectInfoData";
import { IRelationsResultData, ISerializableInfoItem } from "../workers/IProjectWorkerMessage";
/**
 * Result of combined relations + info set processing in worker.
 */
export interface IProcessRelationsAndInfoSetWorkerResult {
    relationsApplied: boolean;
    infoItems?: ProjectInfoItem[];
    thumbnails?: {
        [projectPath: string]: string;
    };
    thumbnailLinks?: {
        [projectPath: string]: string;
    };
}
/**
 * Progress callback type for worker operations.
 */
export type WorkerProgressCallback = (message: string, percent?: number) => void;
/**
 * Callback when relations calculation completes (streaming).
 */
export type RelationsCompleteCallback = (relationsData: IRelationsResultData) => void;
/**
 * Callback when validation completes (streaming).
 * Can be async to allow processing like preloading forms.
 */
export type ValidationCompleteCallback = (infoItems: ISerializableInfoItem[]) => void | Promise<void>;
/**
 * Callback when a batch of thumbnails completes (streaming).
 */
export type ThumbnailBatchCallback = (thumbnails: {
    [projectPath: string]: string;
}, thumbnailLinks: {
    [projectPath: string]: string;
} | undefined, completed: number, total: number) => void;
/**
 * Callback when all thumbnails are finished (streaming).
 */
export type ThumbnailsFinishedCallback = (cancelled: boolean, totalGenerated: number) => void;
/**
 * Streaming callbacks for combined worker operations.
 * Results are delivered via these callbacks as they complete,
 * rather than waiting for all operations to finish.
 */
export interface IStreamingCallbacks {
    /**
     * Called when relations calculation completes.
     * This is the first callback to fire - allows UI to unblock early.
     */
    onRelationsComplete?: RelationsCompleteCallback;
    /**
     * Called when validation completes.
     * Contains all info items (errors, warnings, recommendations).
     */
    onValidationComplete?: ValidationCompleteCallback;
    /**
     * Called when a batch of thumbnails completes.
     * Thumbnails are generated in batches (default 20 at a time) to avoid blocking.
     * This callback is for internal tracking only - NOT shown in user-visible progress.
     */
    onThumbnailBatch?: ThumbnailBatchCallback;
    /**
     * Called when all thumbnails have finished (or were cancelled).
     */
    onThumbnailsFinished?: ThumbnailsFinishedCallback;
}
/**
 * Minimal project interface for worker manager operations.
 * This avoids circular dependencies with the full Project class.
 */
export interface IProjectForWorker {
    readonly name: string;
    readonly projectFolder: import("../storage/IFolder").default | null;
    getItemsCopy(): import("./ProjectItem").default[];
}
/**
 * Interface for project worker manager implementations.
 * This abstracts the web worker functionality so that Project.ts doesn't
 * have a direct dependency on the workers folder.
 *
 * Architecture notes:
 * - Single persistent worker instance per app
 * - Worker caches the project to avoid re-hydration on subsequent requests
 * - Results are streamed back: relations -> validation -> thumbnails (low-priority)
 * - Project is disposed on switch (new project) or after idle timeout (5 min)
 */
export interface IProjectWorkerManager {
    /**
     * Whether web workers are supported in the current environment
     */
    readonly isSupported: boolean;
    /**
     * Generate info set in a web worker.
     * @returns Array of ProjectInfoItem if successful, undefined to fall back to main thread
     */
    generateInfoSetInWorker(project: IProjectForWorker, suite: ProjectInfoSuite, onProgress?: WorkerProgressCallback): Promise<ProjectInfoItem[] | undefined>;
    /**
     * Process item relations AND generate info set in a single worker operation.
     * Uses streaming architecture - results are delivered via callbacks as they complete:
     * 1. onRelationsComplete - called as soon as relations are calculated (unblocks waiters)
     * 2. onValidationComplete - called after validation finishes
     * 3. onThumbnailBatch - called as thumbnail batches complete (silently in background)
     * 4. onThumbnailsFinished - called when all thumbnails are done
     *
     * @param project The project to process
     * @param suite The validation suite to run
     * @param callbacks Streaming callbacks for receiving results as they complete
     * @param onProgress Optional progress callback (for user-visible progress)
     * @returns Promise that resolves when validation is complete (thumbnails may still be generating)
     */
    processRelationsAndGenerateInfoSetInWorker(project: IProjectForWorker, suite: ProjectInfoSuite, callbacks?: IStreamingCallbacks, onProgress?: WorkerProgressCallback): Promise<IProcessRelationsAndInfoSetWorkerResult | undefined>;
    /**
     * Cancel pending thumbnail generation in the worker.
     * Called when switching projects to stop background thumbnail work.
     */
    cancelPendingThumbnails(): void;
    /**
     * Dispose the cached project in the worker to free memory.
     * Called when switching projects or on idle timeout.
     */
    disposeWorkerProject(): void;
    /**
     * Terminate the worker.
     */
    terminate(): void;
}
/**
 * Register a project worker manager implementation.
 * Called by ProjectWorkerManager when it's loaded.
 */
export declare function registerProjectWorkerManager(manager: IProjectWorkerManager): void;
/**
 * Get the registered project worker manager, if available.
 * Returns undefined if no worker manager has been registered or workers aren't supported.
 */
export declare function getProjectWorkerManager(): IProjectWorkerManager | undefined;