import { BookType, WorkBook, WritingOptions } from 'xlsx-js-style';
import { JsonPrimitive } from '@salesforce/ts-types';
import { Buffer } from 'node:buffer';
import { Readable } from 'node:stream';
export type Sheet = SimpleSheet | StructuredSheet;
export type SimpleSheet = (JsonPrimitive[] | Record<string, JsonPrimitive>)[];
export type StructuredSheet = {
    name?: string;
    data: SimpleSheet;
    header?: string[];
    skipHeader?: boolean;
};
export declare function isSimpleSheet(input: unknown): input is SimpleSheet;
export declare function isStructuredSheet(input: unknown): input is StructuredSheet;
type SpreadsheetWriteOptions = {
    format: BookType;
    compression: boolean;
};
type SpreadsheetGenerateOptions = Omit<WritingOptions, 'type'>;
/**
 * Builds and exports single and multi-sheet Excel Workbooks from JSON
 * arrays and dictionaries.
 */
export declare class Spreadsheet {
    workbook: WorkBook;
    constructor();
    addSheet(input: unknown, name?: string): string | undefined;
    save(filename: string, customOptions?: Partial<SpreadsheetWriteOptions>): Promise<string>;
    toBuffer(customOptions?: Partial<SpreadsheetGenerateOptions>): Buffer;
    toStream(customOptions?: Partial<SpreadsheetGenerateOptions>): Readable;
}
export {};
//# sourceMappingURL=spreadsheet.d.ts.map