import { DesignSystemData, DesignSystemComponent, SyncConfig } from './types';
export declare class StrataSystemSyncService extends EventTarget {
    private static instance;
    private config;
    private designSystemData;
    private wsConnection;
    private pollInterval;
    private reconnectAttempts;
    private maxReconnectAttempts;
    private shouldReconnect;
    private baseUrl;
    private isPolling;
    private subscribers;
    private componentLookupIndex;
    private readonly coreAssetKeys;
    private constructor();
    static getInstance(): StrataSystemSyncService;
    initialize(config: SyncConfig): Promise<void>;
    private fetchLocalData;
    private isLocalEnvironment;
    private fetchInitialData;
    private fetchSnapshotVariables;
    private fetchCssContent;
    private parseCssVariables;
    private detectVariableType;
    private extractUnit;
    private fetchFromSyncEndpoints;
    private buildEndpoint;
    private buildProjectMetadataEndpoints;
    private buildProjectAssetsEndpoints;
    private fetchWithFallback;
    private normalizeVariablesPayload;
    private normalizeBackendComponent;
    private normalizeComponentsPayload;
    private extractItems;
    private fetchCorePayload;
    private extractFromDesignSystemData;
    private fetchProjectMetadata;
    private fetchProjectAssetUrls;
    private extractCoreAssetUrls;
    private loadJsonAsset;
    private findNestedValue;
    private applyDesignSystemToDocument;
    private setupRealtimeSync;
    private setupWebSocket;
    private setupPolling;
    private handleRealtimeUpdate;
    getDesignSystemData(): DesignSystemData;
    private buildComponentLookupIndex;
    private dispatchLookupError;
    getComponent(componentName: string): DesignSystemComponent | undefined;
    getAllComponents(): Record<string, DesignSystemComponent>;
    getVariable(variableName: string): import("./types").DesignSystemVariable;
    getAllVariables(): Record<string, import("./types").DesignSystemVariable>;
    subscribe(eventType: string, callback: (data: any) => void): () => void;
    private notifySubscribers;
    private dispatchSyncEvent;
    disconnect(): void;
    static reset(): void;
}