export = tocbot;
export as namespace tocbot;

declare namespace tocbot {
  /**
   * @see https://github.com/tscanlin/tocbot#options
   */
  interface IStaticOptions {

    // Where to render the table of contents.
    tocSelector?: string;

    // Where to grab the headings to build the table of contents.
    contentSelector?: string;

    // Which headings to grab inside of the contentSelector element.
    headingSelector?: string;

    // Headings that match the ignoreSelector will be skipped.
    ignoreSelector?: string;

    // For headings inside relative or absolute positioned containers within content.
    hasInnerContainers?: boolean;

    // Main class to add to links.
    linkClass?: string;

    // Extra classes to add to links.
    extraLinkClasses?: string;

    // Class to add to active links;
    // the link corresponding to the top most heading on the page.
    activeLinkClass?: string;

    // Main class to add to lists.
    listClass?: string;

    // Extra classes to add to lists.
    extraListClasses?: string;

    // Class that gets added when a list should be collapsed.
    isCollapsedClass?: string;

    // Class that gets added when a list should be able
    // to be collapsed but isn't necessarily collapsed.
    collapsibleClass?: string;

    // Class to add to list items.
    listItemClass?: string;

    // How many heading levels should not be collapsed.
    // For example; number 6 will show everything since
    // there are only 6 heading levels and number 0 will collapse them all.
    // The sections that are hidden will open
    // and close as you scroll to headings within them.
    collapseDepth?: number;

    // Smooth scrolling enabled.
    scrollSmooth?: boolean;

    // Smooth scroll duration.
    scrollSmoothDuration?: number;

    // Callback for scroll end.
    scrollEndCallback?(e: MouseWheelEvent): void;

    // Headings offset between the headings and the top of the document (this is meant for minor adjustments).
    headingsOffset?: number;

    // Timeout between events firing to make sure it's
    // not too rapid (for performance reasons).
    throttleTimeout?: number;

    // Element to add the positionFixedClass to.
    positionFixedSelector?: string | null;

    // Fixed position class to add to make sidebar fixed after scrolling
    // down past the fixedSidebarOffset.
    positionFixedClass?: string;

    // fixedSidebarOffset can be any number but by default is set
    // to auto which sets the fixedSidebarOffset to the sidebar
    // element's offsetTop from the top of the document on init.
    fixedSidebarOffset?: 'auto' | number;

    // includeHtml can be set to true to include the HTML markup from the
    // heading node instead of just including the textContent.
    includeHtml?: boolean;

    // onclick function to apply to all links in toc. will be called with
    // the event as the first parameter; and this can be used to stop;
    // propagation; prevent default or perform action
    onClick?: (e: MouseEvent) => void;

    // orderedList can be set to false to generate unordered lists (ul)
    // instead of ordered lists (ol)
    orderedList?: boolean;

    // If there is a fixed article scroll container; set to calculate titles' offset
    scrollContainer?: string | null;

    // prevent ToC DOM rendering if it's already rendered by an external system
    skipRendering?: boolean;
        
    // Optional callback to change heading labels. 
    // For example it can be used to cut down and put ellipses on multiline headings you deem too long.
    // Called each time a heading is parsed. Expects a string in return, the modified label to display.
    headingLabelCallback?: (headingLabel: string) => string;

    // ignore headings that are hidden in DOM
    ignoreHiddenElements?: boolean;

    // Optional callback to modify properties of parsed headings.
    // The heading element is passed in node parameter and information parsed by default parser is provided in obj parameter.
    // Function has to return the same or modified obj. 
    // The heading will be excluded from TOC if nothing is returned.
    headingObjectCallback?: (obj: object, node: HTMLElement) => object | void;
  }

  /**
   * Initialize tocbot with an options object.
   * @see https://github.com/tscanlin/tocbot#init
   */
  function init(options?: IStaticOptions): void;

  /**
   * Destroy tocbot and remove event listeners.
   * @see https://github.com/tscanlin/tocbot#destroy
   */
  function destroy(): void;

  /**
   * Refresh tocbot if the document changes and it needs to be rebuilt.
   * @see https://github.com/tscanlin/tocbot#refresh
   */
  function refresh(): void;
}
