interface NestedObject {
    [key: string]: string | NestedObject | undefined;
}
interface SheetData {
    [key: string]: NestedObject;
}
type SyncStrategy = 'local' | 'remote' | 'merge';
interface SyncOptions {
    strategy?: SyncStrategy;
    sheetName?: string;
    createSheet?: boolean;
}
interface SyncResult {
    added: {
        local: number;
        remote: number;
    };
    updated: {
        local: number;
        remote: number;
    };
    languages: string[];
}
declare class SheetManager {
    private doc;
    private jwt;
    constructor(privateKey: string, clientEmail: string, sheetId: string);
    init(userPath: string, sheetNames?: string[]): Promise<void>;
    read(sheetPosition?: number): Promise<SheetData>;
    readByName(sheetName: string): Promise<SheetData>;
    readAllSheets(): Promise<{
        [sheetName: string]: SheetData;
    }>;
    private processSheet;
    private setNestedValue;
    private mergeNestedObjects;
    write(data: SheetData, directoryPath: string): void;
    listSheets(): Promise<string[]>;
    readLocal(directoryPath: string): SheetData;
    push(directoryPath: string, sheetName?: string): Promise<void>;
    sync(directoryPath: string, options?: SyncOptions): Promise<SyncResult>;
    private flattenNestedObject;
    private flattenSheetData;
    private flattenAllLanguages;
}

export { SheetManager };