export type SyncStatus = "idle" | "syncing" | "error" | "offline";
export type SyncOperation = {
    id: string;
    timestamp: number | Date;
    type: "create" | "update" | "delete";
    entity: string;
    data: unknown;
    status: "pending" | "completed" | "error";
    retryCount: number;
};
export interface SyncConfig {
    retryLimit: number;
    retryDelay: number;
    batchSize: number;
    autoStart: boolean;
    debug: boolean;
    entityTypes?: EntityType[];
}
export type Entity = {
    id: string;
    [key: string]: any;
};
export type SyncEvent = "syncStart" | "syncComplete" | "syncError" | "statusChange" | "operationComplete";
export type EntityType = string;
export type SyncEventType = SyncEvent | EntityType;
export type SyncEventCallback = (data?: unknown) => void;
export interface ISyncEngine {
    init(): Promise<void>;
    start(): Promise<void>;
    stop(): Promise<void>;
    sync(): Promise<void>;
    getStatus(): SyncStatus;
    addListener(event: SyncEventType, callback: SyncEventCallback): void;
    removeListener(event: SyncEventType, callback: SyncEventCallback): void;
    getEntities(entityType: EntityType): Promise<Entity[]>;
    getEntityTypes(): EntityType[];
    addEntityListener(entityType: EntityType, callback: (entities: Entity[]) => void): void;
    removeEntityListener(entityType: EntityType, callback: (entities: Entity[]) => void): void;
    getPendingOperations(): Promise<SyncOperation[]>;
    removePendingOperations(): Promise<SyncOperation[]>;
}