/* index.d.ts (C) 2015-present SheetJS and contributors */
// TypeScript Version: 2.2
// import * as CFB from "cfb";
// import * as SSF from "ssf";

/** Version string */
export const version: string;

/** SSF Formatter Library */
// export { SSF };
export const SSF: any;

/** CFB Library */
// export { CFB };
export const CFB: any;

/** Set internal `fs` instance */
export function set_fs(fs: any): void;
/** Set internal codepage tables */
export function set_cptable(cptable: any): void;

/**
 * Attempts to synchronously read and parse a file from its supplied file path.
 *
 * NOTE: This function is only supported in server-side environments that
 * provide synchronous file-reading APIs (e.g. NodeJS)
 */
export function readFile(filePath: string, opts?: ParsingOptions): WorkBook;
/**
 * Attempts to parse the data supplied
 *
 * @param data the data to parse, in one of the following formats:
 *
 * - `"buffer"` (`Uint8Array` or NodeJS `Buffer`): binary data consisting of
 * 8-bit unsigned integers
 * - `"array"` (`ArrayBuffer`)
 * - `"base64"` (`string`): Base64 encoding of the file
 * - `"file"` (`string`): path of file that will be read (server-side
 * environments only. See also {@link readFile}.)
 * - `"string"` (`string`): JS string (only appropriate for UTF-8 text formats)
 * - `"binary"` (`string`): binary string (byte `n` is `data.charCodeAt(n)`)
 *
 * Some common formats are automatically deduced from the data input type,
 * including `Uint8Array` and `ArrayBuffer` objects and NodeJS `Buffer`
 * objects. Alternatively, the format can be explicitly supplied as
 * `opts.type`.
 *
 * When a string is passed with no `type`, the library assumes the data is a
 * Base64 string. `FileReader#readAsBinaryString` or ASCII data requires
 * "binary" type. DOM strings, including `FileReader#readAsText`, should use
 * type "string".
 */
export function read(data: ArrayBuffer | Uint8Array | string, opts?: ParsingOptions): WorkBook;
/** Attempts to write or download workbook data to file */
export function writeFile(data: WorkBook, filename: string, opts?: WritingOptions): void;
/** Attempts to write or download workbook data to XLSX file */
export function writeFileXLSX(data: WorkBook, filename: string, opts?: WritingOptions): void;
/** Attempts to write or download workbook data to file asynchronously */
type CBFunc = () => void;
export function writeFileAsync(filename: string, data: WorkBook, opts: WritingOptions | CBFunc, cb?: CBFunc): void;
/** Attempts to write the workbook data */
export function write<T extends WritingOptionsType = WritingOptionsType>(data: WorkBook, opts: WritingOptions<T>):
    T extends 'buffer' ? Uint8Array : T extends 'array' ? ArrayBuffer : string;
/** Attempts to write the workbook data as XLSX */
export function writeXLSX(data: WorkBook, opts: WritingOptions): void;

/** Utility Functions */
export const utils: XLSX$Utils;
/** Stream Utility Functions */
export const stream: StreamUtils;

/** Number Format (either a string or an index to the format table) */
export type NumberFormat = string | number;

/** Worksheet specifier (string, number, worksheet) */
export type WSSpec = string | number | WorkSheet;

/** Range specifier (string or range or cell), single-cell lifted to range */
export type RangeSpec = string | Range | CellAddress;

/** Basic File Properties */
export interface Properties {
    /** Summary tab "Title" */
    Title?: string;
    /** Summary tab "Subject" */
    Subject?: string;
    /** Summary tab "Author" */
    Author?: string;
    /** Summary tab "Manager" */
    Manager?: string;
    /** Summary tab "Company" */
    Company?: string;
    /** Summary tab "Category" */
    Category?: string;
    /** Summary tab "Keywords" */
    Keywords?: string;
    /** Summary tab "Comments" */
    Comments?: string;
    /** Statistics tab "Last saved by" */
    LastAuthor?: string;
    /** Statistics tab "Created" */
    CreatedDate?: Date;
}

/** Other supported properties */
export interface FullProperties extends Properties {
    ModifiedDate?: Date;
    Application?: string;
    AppVersion?: string;
    DocSecurity?: string;
    HyperlinksChanged?: boolean;
    SharedDoc?: boolean;
    LinksUpToDate?: boolean;
    ScaleCrop?: boolean;
    Worksheets?: number;
    SheetNames?: string[];
    ContentStatus?: string;
    LastPrinted?: string;
    Revision?: string | number;
    Version?: string;
    Identifier?: string;
    Language?: string;
}

export interface CommonOptions {
    /**
     * If true, throw errors when features are not understood
     * @default false
     */
    WTF?: boolean;

    /**
     * When reading a file with VBA macros, expose CFB blob to `vbaraw` field
     * When writing BIFF8/XLSB/XLSM, reseat `vbaraw` and export to file
     * @default false
     */
    bookVBA?: boolean;

    /**
     * When reading a file, store dates as type d (default is n)
     * When writing XLSX/XLSM file, use native date (default uses date codes)
     * @default false
     */
    cellDates?: boolean;

    /**
     * Create cell objects for stub cells
     * @default false
     */
    sheetStubs?: boolean;

    /**
     * When reading a file, save style/theme info to the .s field
     * When writing a file, export style/theme info
     * @default false
     */
    cellStyles?: boolean;

    /**
     * If defined and file is encrypted, use password
     * @default ''
     */
    password?: string;
}

export interface DateNFOption {
    /** Use specified date format */
    dateNF?: NumberFormat;
}

export interface UTCOption {
    /**
     * For plaintext formats, interpret ambiguous datetimes in UTC
     * If explicitly set to `false`, dates will be parsed in local time.
     *
     * The `true` option is consistent with spreadsheet application export.
     *
     * @default true
     */
    UTC?: boolean;
}

export interface DenseOption {
    /** If true, generate dense-mode worksheets */
    dense?: boolean;
}

/** Options for read and readFile */
export interface ParsingOptions extends UTCOption, CommonOptions, DenseOption {
    /** Input data encoding */
    type?: 'base64' | 'binary' | 'buffer' | 'file' | 'array' | 'string';

    /**
     * Default codepage for legacy files
     *
     * This requires encoding support to be loaded.  It is automatically loaded
     * in `xlsx.full.min.js` and in CommonJS / Extendscript, but an extra step
     * is required in React / Angular / Webpack ESM deployments.
     *
     * Check the relevant guide https://docs.sheetjs.com/docs/getting-started/
     */
    codepage?: number;

    /**
     * Save formulae to the .f field
     * @default true
     */
    cellFormula?: boolean;

    /**
     * Parse rich text and save HTML to the .h field
     * @default true
     */
    cellHTML?: boolean;

    /**
     * Save number format string to the .z field
     * @default false
     */
    cellNF?: boolean;

    /**
     * Generate formatted text to the .w field
     * @default true
     */
    cellText?: boolean;

    /** Override default date format (code 14) */
    dateNF?: string;

    /** Field Separator ("Delimiter" override) */
    FS?: string;

    /**
     * If >0, read the first sheetRows rows
     * @default 0
     */
    sheetRows?: number;

    /**
     * If true, parse calculation chains
     * @default false
     */
    bookDeps?: boolean;

    /**
     * If true, add raw files to book object
     * @default false
     */
    bookFiles?: boolean;

    /**
     * If true, only parse enough to get book metadata
     * @default false
     */
    bookProps?: boolean;

    /**
     * If true, only parse enough to get the sheet names
     * @default false
     */
    bookSheets?: boolean;

    /** If specified, only parse the specified sheets or sheet names */
    sheets?: number | string | Array<number | string>;

    /** If true, plaintext parsing will not parse values */
    raw?: boolean;

    /** If true, ignore "dimensions" records and guess range using every cell */
    nodim?: boolean;

    /** If true, preserve _xlfn. prefixes in formula function names */
    xlfn?: boolean;

    /**
     * For single-sheet formats (including CSV), override the worksheet name
     * @default "Sheet1"
     */
    sheet?: string;

    PRN?: boolean;
}

type WritingOptionsType = 'base64' | 'binary' | 'buffer' | 'file' | 'array' | 'string';

/** Options for write and writeFile */
export interface WritingOptions<T extends WritingOptionsType = WritingOptionsType> extends CommonOptions {
    /** Output data encoding */
    type: T;

    /**
     * Generate Shared String Table
     * @default false
     */
    bookSST?: boolean;

    /**
     * File format of generated workbook
     * @default 'xlsx'
     */
    bookType?: BookType;

    /**
     * Use ZIP compression for ZIP-based formats
     * @default false
     */
    compression?: boolean;

    /** Overwride theme XML when exporting to XLSX/XLSM/XLSB */
    themeXLSX?: string;

    /**
     * Suppress "number stored as text" errors in generated files
     * @default true
     */
    ignoreEC?: boolean;

    /** Override workbook properties on save */
    Props?: Properties;

    /**
     * Desired codepage for legacy file formats
     *
     * This requires encoding support to be loaded.  It is automatically loaded
     * in `xlsx.full.min.js` and in CommonJS / Extendscript, but an extra step
     * is required in React / Angular / Webpack / ESM deployments.
     *
     * Check the relevant guide https://docs.sheetjs.com/docs/getting-started/
     */
    codepage?: number;

    /** Base64 encoding of NUMBERS base for exports */
    numbers?: string;

    /**
     * For single-sheet formats, export the specified worksheet.
     *
     * The property must be a string (sheet name) or number (`SheetNames` index).
     *
     * If this option is omitted, the first worksheet will be exported.
     */
    sheet?: string | number;

    /** Field Separator ("delimiter") for CSV / Text output */
    FS?: string;

    /** Record Separator ("row separator") for CSV / Text output */
    RS?: string;
}

/** Workbook Object */
export interface WorkBook {
    /**
     * A dictionary of the worksheets in the workbook.
     * Use SheetNames to reference these.
     */
    Sheets: { [sheet: string]: WorkSheet };

    /** Ordered list of the sheet names in the workbook */
    SheetNames: string[];

    /** Standard workbook Properties */
    Props?: FullProperties;

    /** Custom workbook Properties */
    Custprops?: object;

    Workbook?: WBProps;

    vbaraw?: any;

    /** Original file type (when parsed with `read` or `readFile`) */
    bookType?: BookType;
}

export interface SheetProps {
    /** Name of Sheet */
    name?: string;

    /** Sheet Visibility (0=Visible 1=Hidden 2=VeryHidden) */
    Hidden?: 0 | 1 | 2;

    /** Name of Document Module in associated VBA Project */
    CodeName?: string;
}

/** Defined Name Object */
export interface DefinedName {
    /** Name */
    Name: string;

    /** Reference */
    Ref: string;

    /** Scope (undefined for workbook scope) */
    Sheet?: number;

    /** Name comment */
    Comment?: string;
}

/** Workbook-Level Attributes */
export interface WBProps {
    /** Sheet Properties */
    Sheets?: SheetProps[];

    /** Defined Names */
    Names?: DefinedName[];

    /** Workbook Views */
    Views?: WBView[];

    /** Other Workbook Properties */
    WBProps?: WorkbookProperties;
}

/** Workbook View */
export interface WBView {
    /** Right-to-left mode */
    RTL?: boolean;
}

/** Other Workbook Properties */
export interface WorkbookProperties {
    /** Worksheet Epoch (1904 if true, 1900 if false) */
    date1904?: boolean;

    /** Warn or strip personally identifying info on save */
    filterPrivacy?: boolean;

    /** Name of Document Module in associated VBA Project */
    CodeName?: string;
}

/** DBF Field Header */
export interface DBFField {
    /** Original Field Name */
    name?: string;

    /** Field Type */
    type?: string;

    /** Field Length */
    len?: number;

    /** Field Decimal Count */
    dec?: number;
}

/** Column Properties Object */
export interface ColInfo {
    /* --- visibility --- */

    /** if true, the column is hidden */
    hidden?: boolean;

    /* --- column width --- */

    /** width in Excel's "Max Digit Width", width*256 is integral */
    width?: number;

    /** width in screen pixels */
    wpx?: number;

    /** width in "characters" */
    wch?: number;

    /** outline / group level */
    level?: number;

    /** Excel's "Max Digit Width" unit, always integral */
    MDW?: number;

    /** DBF Field Header */
    DBF?: DBFField;
}

/** Row Properties Object */
export interface RowInfo {
    /* --- visibility --- */

    /** if true, the column is hidden */
    hidden?: boolean;

    /* --- row height --- */

    /** height in screen pixels */
    hpx?: number;

    /** height in points */
    hpt?: number;

    /** outline / group level */
    level?: number;
}

/**
 * Write sheet protection properties.
 */
export interface ProtectInfo {
    /**
     * The password for formats that support password-protected sheets
     * (XLSX/XLSB/XLS). The writer uses the XOR obfuscation method.
     */
    password?: string;
    /**
     * Select locked cells
     * @default: true
     */
    selectLockedCells?: boolean;
    /**
     * Select unlocked cells
     * @default: true
     */
    selectUnlockedCells?: boolean;
    /**
     * Format cells
     * @default: false
     */
    formatCells?: boolean;
    /**
     * Format columns
     * @default: false
     */
    formatColumns?: boolean;
    /**
     * Format rows
     * @default: false
     */
    formatRows?: boolean;
    /**
     * Insert columns
     * @default: false
     */
    insertColumns?: boolean;
    /**
     * Insert rows
     * @default: false
     */
    insertRows?: boolean;
    /**
     * Insert hyperlinks
     * @default: false
     */
    insertHyperlinks?: boolean;
    /**
     * Delete columns
     * @default: false
     */
    deleteColumns?: boolean;
    /**
     * Delete rows
     * @default: false
     */
    deleteRows?: boolean;
    /**
     * Sort
     * @default: false
     */
    sort?: boolean;
    /**
     * Filter
     * @default: false
     */
    autoFilter?: boolean;
    /**
     * Use PivotTable reports
     * @default: false
     */
    pivotTables?: boolean;
    /**
     * Edit objects
     * @default: true
     */
    objects?: boolean;
    /**
     * Edit scenarios
     * @default: true
     */
    scenarios?: boolean;
}

/** Page Margins -- see Excel Page Setup .. Margins diagram for explanation */
export interface MarginInfo {
    /** Left side margin (inches) */
    left?: number;
    /** Right side margin (inches) */
    right?: number;
    /** Top side margin (inches) */
    top?: number;
    /** Bottom side margin (inches) */
    bottom?: number;
    /** Header top margin (inches) */
    header?: number;
    /** Footer bottom height (inches) */
    footer?: number;
}
export type SheetType = 'sheet' | 'chart';
export type SheetKeys = string | MarginInfo | SheetType;
/** General object representing a Sheet (worksheet or chartsheet) */
export interface Sheet {
    /**
     * Sparse-mode store cells with keys corresponding to A1-style address
     * Dense-mode  store cells in the '!data' key
     * Special keys start with '!'
     */
    [cell: string]: CellObject | CellObject[][] | SheetKeys | any;

    /**
     * Dense-mode worksheets store data in an array of arrays
     *
     * Cells are accessed with sheet['!data'][R][C] (where R and C are 0-indexed)
     */
    '!data'?: CellObject[][];

    /** Sheet type */
    '!type'?: SheetType;

    /** Sheet Range (A1-style) */
    '!ref'?: string;

    /** Page Margins */
    '!margins'?: MarginInfo;
}
/** General object representing a dense Sheet (worksheet or chartsheet) */
export interface DenseSheet extends Sheet {
    /**
     * Special keys start with '!'
     * Dense-mode worksheets store data in the '!data' key
     */
    [cell: string]: CellObject[][] | SheetKeys | any;

    /**
     * Dense-mode worksheets store data in an array of arrays
     *
     * Cells are accessed with sheet['!data'][R][C] (where R and C are 0-indexed)
     */
    '!data': CellObject[][];
}
/** General object representing a sparse Sheet (worksheet or chartsheet) */
export interface SparseSheet extends Sheet {
    /**
     * Sparse-mode store cells with keys corresponding to A1-style address
     * Cells are accessed with sheet[addr]
     */
    '!data': never;
}


/** AutoFilter properties */
export interface AutoFilterInfo {
    /** Range of the AutoFilter table */
    ref: string;
}

export type WSKeys = SheetKeys | ColInfo[] | RowInfo[] | Range[] | ProtectInfo | AutoFilterInfo;

/** Worksheet Object */
export interface WorkSheet extends Sheet {
    /**
     * Indexing with a cell address string maps to a cell object
     * Special keys start with '!'
     */
    [cell: string]: CellObject | WSKeys | any;

    /** Column Info */
    '!cols'?: ColInfo[];

    /** Row Info */
    '!rows'?: RowInfo[];

    /** Merge Ranges */
    '!merges'?: Range[];

    /** Worksheet Protection info */
    '!protect'?: ProtectInfo;

    /** AutoFilter info */
    '!autofilter'?: AutoFilterInfo;
}
/** Dense Worksheet Object */
export interface DenseWorkSheet extends DenseSheet {
    /**
     * Dense-mode worksheets store data in an array of arrays
     *
     * Cells are accessed with sheet['!data'][R][C] (where R and C are 0-indexed)
     */
    '!data': CellObject[][];
}

/**
 * Worksheet Object with CellObject type
 *
 * The normal Worksheet type uses indexer of type `any` -- this enforces CellObject
 */
export interface StrictWS { [addr: string]: CellObject; }

/**
 * The Excel data type for a cell.
 * b Boolean, n Number, e error, s String, d Date, z Stub
 */
export type ExcelDataType = 'b' | 'n' | 'e' | 's' | 'd' | 'z';

/**
 * Type of generated workbook
 * @default 'xlsx'
 */
export type BookType = 'xlsx' | 'xlsm' | 'xlsb' | 'xls' | 'xla' | 'biff8' | 'biff5' | 'biff2' | 'xlml' | 'ods' | 'fods' | 'csv' | 'txt' | 'sylk' | 'slk' | 'html' | 'dif' | 'rtf' | 'prn' | 'eth' | 'dbf' | 'numbers';

/** Comment element */
export interface Comment {
    /** Author of the comment block */
    a?: string;

    /** Plaintext of the comment */
    t: string;

    /** If true, mark the comment as a part of a thread */
    T?: boolean;
}

/** Cell comments */
export interface Comments extends Array<Comment> {
    /** Hide comment by default */
    hidden?: boolean;
}

/** Link object */
export interface Hyperlink {
    /** Target of the link (HREF) */
    Target: string;

    /** Plaintext tooltip to display when mouse is over cell */
    Tooltip?: string;
}

/** Worksheet Cell Object */
export interface CellObject {
    /** The raw value of the cell.  Can be omitted if a formula is specified */
    v?: string | number | boolean | Date;

    /** Formatted text (if applicable) */
    w?: string;

    /**
     * The Excel Data Type of the cell.
     * b Boolean, n Number, e Error, s String, d Date, z Empty
     */
    t: ExcelDataType;

    /** Cell formula (if applicable) */
    f?: string;

    /** Range of enclosing array if formula is array formula (if applicable) */
    F?: string;

    /** If true, cell is a dynamic array formula (for supported file formats) */
    D?: boolean;

    /** Rich text encoding (if applicable) */
    r?: any;

    /** HTML rendering of the rich text (if applicable) */
    h?: string;

    /** Comments associated with the cell */
    c?: Comments;

    /** Number format string associated with the cell (if requested) */
    z?: NumberFormat;

    /** Cell hyperlink object (.Target holds link, .tooltip is tooltip) */
    l?: Hyperlink;

    /** The style/theme of the cell (if applicable) */
    s?: any;
}

/** Simple Cell Address */
export interface CellAddress {
    /** Column number */
    c: number;
    /** Row number */
    r: number;
}

/** Range object (representing ranges like "A1:B2") */
export interface Range {
    /** Starting cell */
    s: CellAddress;
    /** Ending cell */
    e: CellAddress;
}

export interface Sheet2CSVOpts extends DateNFOption {
    /** Field Separator ("delimiter") */
    FS?: string;

    /** Record Separator ("row separator") */
    RS?: string;

    /** Remove trailing field separators in each record */
    strip?: boolean;

    /** Include blank lines in the CSV output */
    blankrows?: boolean;

    /** Skip hidden rows and columns in the CSV output */
    skipHidden?: boolean;

    /** Force quotes around fields */
    forceQuotes?: boolean;

    /** if true, return raw numbers; if false, return formatted numbers */
    rawNumbers?: boolean;
}

export interface OriginOption {
    /** Top-Left cell for operation (CellAddress or A1 string or row) */
    origin?: number | string | CellAddress;
}

export interface Sheet2HTMLOpts {
    /** TABLE element id attribute */
    id?: string;

    /** Add contenteditable to every cell */
    editable?: boolean;

    /** Header HTML */
    header?: string;

    /** Footer HTML */
    footer?: string;
}

export type Sheet2JSONCellValue<DefaultVal = undefined> = string | number | boolean | DefaultVal;

export interface Sheet2JSONOpts<DefaultVal = undefined> extends DateNFOption {
    /** Output format */
    header?: 'A' | 1 | readonly string[];

    /** Override worksheet range */
    range?: any;

    /** Include or omit blank lines in the output */
    blankrows?: boolean;

    /** Default value for null/undefined values */
    defval?: DefaultVal;

    /** if true, return raw data; if false, return formatted text */
    raw?: boolean;

    /** if true, skip hidden rows and columns */
    skipHidden?: boolean;

    /** if true, return raw numbers; if false, return formatted numbers */
    rawNumbers?: boolean;

    /**
     * If true, return dates whose UTC interpretation is correct
     * By default, return dates whose local interpretation is correct
     *
     * @default false
     */
    UTC?: boolean;
}

export interface UTCDateOption {
    /**
     * If true, dates are interpreted using the UTC methods
     * By default, dates are interpreted in the local timezone
     *
     * @default false
     */
    UTC?: boolean;
}

export interface AOA2SheetOpts extends CommonOptions, UTCDateOption, DateNFOption, DenseOption {
    /**
     * Create cell objects for stub cells
     * @default false
     */
    sheetStubs?: boolean;
}

export interface SheetAOAOpts extends AOA2SheetOpts, OriginOption {}

export interface JSON2SheetOpts extends CommonOptions, UTCDateOption, DateNFOption, OriginOption, DenseOption {
    /** Use specified column order */
    header?: string[];

    /** Skip header row in generated sheet */
    skipHeader?: boolean;
}

export interface Table2SheetOpts extends CommonOptions, DateNFOption, OriginOption {
    /** If true, plaintext parsing will not parse values */
    raw?: boolean;

    /**
     * If >0, read the first sheetRows rows
     * @default 0
     */
    sheetRows?: number;

    /** If true, hidden rows and cells will not be parsed */
    display?: boolean;

    /**
     * Override the worksheet name
     * @default "Sheet1"
     */
    sheet?: string;

    /**
     * If true, interpret date strings as if they are UTC.
     * By default, date strings are interpreted in the local timezone.
     *
     * @default false
     */
    UTC?: boolean;
}

export interface Table2BookOpts extends Table2SheetOpts {
    /**
     * Override the worksheet name
     * @default "Sheet1"
     */
     sheet?: string;
}

/** General utilities */
export interface XLSX$Utils {
    /* --- Import Functions --- */

    /** Converts an array of arrays of JS data to a worksheet. */
    aoa_to_sheet<T>(data: T[][], opts?: AOA2SheetOpts): WorkSheet;
    aoa_to_sheet(data: any[][], opts?: AOA2SheetOpts): WorkSheet;

    /** Converts an array of JS objects to a worksheet. */
    json_to_sheet<T>(data: T[], opts?: JSON2SheetOpts): WorkSheet;
    json_to_sheet(data: any[], opts?: JSON2SheetOpts): WorkSheet;

    /** BROWSER ONLY! Converts a TABLE DOM element to a worksheet. */
    table_to_sheet(data: any,  opts?: Table2SheetOpts): WorkSheet;
    table_to_book(data: any,  opts?: Table2BookOpts): WorkBook;
    sheet_add_dom(ws: WorkSheet, data: any, opts?: Table2SheetOpts): WorkSheet;

    /* --- Export Functions --- */

    /** Converts a worksheet object to an array of JSON objects */
    sheet_to_json<ColumnKey extends string, DefaultVal = undefined>(worksheet: WorkSheet, opts?: Sheet2JSONOpts<DefaultVal> & { header: readonly ColumnKey[] }): Record<ColumnKey, Sheet2JSONCellValue<DefaultVal>>[];
    sheet_to_json<ColumnKey extends string, DefaultVal = undefined>(worksheet: WorkSheet, opts?: Sheet2JSONOpts<DefaultVal> & { header?: undefined }): Record<string, Sheet2JSONCellValue<DefaultVal>>[];
    sheet_to_json<ColumnKey extends string, DefaultVal = undefined>(worksheet: WorkSheet, opts?: Sheet2JSONOpts<DefaultVal> & { header: 'A' }): Record<string, Sheet2JSONCellValue<DefaultVal>>[];
    sheet_to_json<ColumnKey extends string, DefaultVal = undefined>(worksheet: WorkSheet, opts?: Sheet2JSONOpts<DefaultVal> & { header: 1 }): Sheet2JSONCellValue<DefaultVal>[][];
    // ...or manually supply a row type
    sheet_to_json<T>(worksheet: WorkSheet, opts?: Sheet2JSONOpts): T[];

    /** Generates delimiter-separated-values output */
    sheet_to_csv(worksheet: WorkSheet, options?: Sheet2CSVOpts): string;

    /** Generates UTF16 Formatted Text */
    sheet_to_txt(worksheet: WorkSheet, options?: Sheet2CSVOpts): string;

    /** Generates HTML */
    sheet_to_html(worksheet: WorkSheet, options?: Sheet2HTMLOpts): string;

    /** Generates a list of the formulae (with value fallbacks) */
    sheet_to_formulae(worksheet: WorkSheet): string[];

    /* --- Cell Address Utilities --- */

    /** Converts 0-indexed cell address to A1 form */
    encode_cell(cell: CellAddress): string;

    /** Converts 0-indexed row to A1 form */
    encode_row(row: number): string;

    /** Converts 0-indexed column to A1 form */
    encode_col(col: number): string;

    /** Converts 0-indexed range to A1 form */
    encode_range(s: CellAddress, e: CellAddress): string;
    encode_range(r: Range): string;

    /** Converts A1 cell address to 0-indexed form */
    decode_cell(address: string): CellAddress;

    /** Converts A1 row to 0-indexed form */
    decode_row(row: string): number;

    /** Converts A1 column to 0-indexed form */
    decode_col(col: string): number;

    /** Converts A1 range to 0-indexed form */
    decode_range(range: string): Range;

    /** Format cell */
    format_cell(cell: CellObject, v?: any, opts?: any): string;

    /* --- General Utilities --- */

    /** Create a new workbook */
    book_new(ws?: WorkSheet, wsname?: string): WorkBook;

    /** Create a new worksheet */
    sheet_new(opts?: DenseOption): WorkSheet;

    /** Append a worksheet to a workbook, returns new worksheet name */
    book_append_sheet(workbook: WorkBook, worksheet: WorkSheet, name?: string, roll?: boolean): string;

    /** Set sheet visibility (visible/hidden/very hidden) */
    book_set_sheet_visibility(workbook: WorkBook, sheet: number|string, visibility: number): void;

    /** Set number format for a cell */
    cell_set_number_format(cell: CellObject, fmt: string|number): CellObject;

    /** Set hyperlink for a cell */
    cell_set_hyperlink(cell: CellObject, target: string, tooltip?: string): CellObject;

    /** Set internal link for a cell */
    cell_set_internal_link(cell: CellObject, target: string, tooltip?: string): CellObject;

    /** Add comment to a cell */
    cell_add_comment(cell: CellObject, text: string, author?: string): void;

    /** Assign an Array Formula to a range */
    sheet_set_array_formula(ws: WorkSheet, range: Range|string, formula: string, dynamic?: boolean): WorkSheet;

    /** Add an array of arrays of JS data to a worksheet */
    sheet_add_aoa<T>(ws: WorkSheet, data: T[][], opts?: SheetAOAOpts): WorkSheet;
    sheet_add_aoa(ws: WorkSheet, data: any[][], opts?: SheetAOAOpts): WorkSheet;

    /** Add an array of JS objects to a worksheet */
    sheet_add_json(ws: WorkSheet, data: any[], opts?: JSON2SheetOpts): WorkSheet;
    sheet_add_json<T>(ws: WorkSheet, data: T[], opts?: JSON2SheetOpts): WorkSheet;


    consts: XLSX$Consts;
}

export interface XLSX$Consts {
    /* --- Sheet Visibility --- */

    /** Visibility: Visible */
    SHEET_VISIBLE: 0;

    /** Visibility: Hidden */
    SHEET_HIDDEN: 1;

    /** Visibility: Very Hidden */
    SHEET_VERYHIDDEN: 2;
}

/** NODE ONLY! these return Readable Streams */
export interface StreamUtils {
    /** CSV output stream, generate one line at a time */
    to_csv(sheet: WorkSheet, opts?: Sheet2CSVOpts): any;
    /** HTML output stream, generate one line at a time */
    to_html(sheet: WorkSheet, opts?: Sheet2HTMLOpts): any;
    /** JSON object stream, generate one row at a time */
    to_json(sheet: WorkSheet, opts?: Sheet2JSONOpts): any;
    /** Set `Readable` (internal) */
    set_readable(Readable: any): void;
}