export type Nesting = 1 | 0 | -1;

export default class Token {
    /**
     * Create new token and fill passed properties.
     */
    constructor(type: string, tag: string, nesting: Nesting);

    /**
     * Type of the token, e.g. "paragraph_open"
     */
    type: string;

    /**
     * HTML tag name, e.g. "p"
     */
    tag: string;

    /**
     * HTML attributes. Format: `[ [ name1, value1 ], [ name2, value2 ] ]`
     */
    attrs: Array<[string, string]> | null;

    /**
     * Source map info. Format: `[ line_begin, line_end ]`
     */
    map: [number, number] | null;

    /**
     * Level change (number in {-1, 0, 1} set), where:
     *
     * -  `1` means the tag is opening
     * -  `0` means the tag is self-closing
     * - `-1` means the tag is closing
     */
    nesting: Nesting;

    /**
     * Nesting level, the same as `state.level`
     */
    level: number;

    /**
     * An array of child nodes (inline and img tokens)
     */
    children: Token[] | null;

    /**
     * In a case of self-closing tag (code, html, fence, etc.),
     * it has contents of this tag.
     */
    content: string;

    /**
     * '*' or '_' for emphasis, fence string for fence, etc.
     */
    markup: string;

    /**
     * - Info string for "fence" tokens
     * - The value "auto" for autolink "link_open" and "link_close" tokens
     * - The string value of the item marker for ordered-list "list_item_open" tokens
     */
    info: string;

    /**
     * A place for plugins to store an arbitrary data
     */
    meta: any;

    /**
     * True for block-level tokens, false for inline tokens.
     * Used in renderer to calculate line breaks
     */
    block: boolean;

    /**
     * If it's true, ignore this element when rendering. Used for tight lists
     * to hide paragraphs.
     */
    hidden: boolean;

    /**
     * Search attribute index by name.
     */
    attrIndex(name: string): number;

    /**
     * Add `[ name, value ]` attribute to list. Init attrs if necessary
     */
    attrPush(attrData: [string, string]): void;

    /**
     * Set `name` attribute to `value`. Override old value if exists.
     */
    attrSet(name: string, value: string): void;

    /**
     * Get the value of attribute `name`, or null if it does not exist.
     */
    attrGet(name: string): string | null;

    /**
     * Join value to existing attribute via space. Or create new attribute if not
     * exists. Useful to operate with token classes.
     */
    attrJoin(name: string, value: string): void;
}