import { BaseNode } from 'estree';

export interface AttachedScope {
  parent?: AttachedScope;
  isBlockScope: boolean;
  declarations: { [key: string]: boolean };
  addDeclaration(node: BaseNode, isBlockDeclaration: boolean, isVar: boolean): void;
  contains(name: string): boolean;
}

export interface DataToEsmOptions {
  compact?: boolean;
  indent?: string;
  namedExports?: boolean;
  objectShorthand?: boolean;
  preferConst?: boolean;
}

/**
 * A valid `picomatch` glob pattern, or array of patterns.
 */
export type FilterPattern = ReadonlyArray<string | RegExp> | string | RegExp | null;

/**
 * Adds an extension to a module ID if one does not exist.
 */
export function addExtension(filename: string, ext?: string): string;

/**
 * Attaches `Scope` objects to the relevant nodes of an AST.
 * Each `Scope` object has a `scope.contains(name)` method that returns `true`
 * if a given name is defined in the current scope or a parent scope.
 */
export function attachScopes(ast: BaseNode, propertyName?: string): AttachedScope;

/**
 * Constructs a filter function which can be used to determine whether or not
 * certain modules should be operated upon.
 * @param include If `include` is omitted or has zero length, filter will return `true` by default.
 * @param exclude ID must not match any of the `exclude` patterns.
 * @param options Optionally resolves the patterns against a directory other than `process.cwd()`.
 * If a `string` is specified, then the value will be used as the base directory.
 * Relative paths will be resolved against `process.cwd()` first.
 * If `false`, then the patterns will not be resolved against any directory.
 * This can be useful if you want to create a filter for virtual module names.
 */
export function createFilter(
  include?: FilterPattern,
  exclude?: FilterPattern,
  options?: { resolve?: string | false | null }
): (id: string | unknown) => boolean;

/**
 * Transforms objects into tree-shakable ES Module imports.
 * @param data An object to transform into an ES module.
 */
export function dataToEsm(data: unknown, options?: DataToEsmOptions): string;

/**
 * Extracts the names of all assignment targets based upon specified patterns.
 * @param param An `acorn` AST Node.
 */
export function extractAssignedNames(param: BaseNode): string[];

/**
 * Constructs a bundle-safe identifier from a `string`.
 */
export function makeLegalIdentifier(str: string): string;

/**
 * Converts path separators to forward slash.
 */
export function normalizePath(filename: string): string;

export type AddExtension = typeof addExtension;
export type AttachScopes = typeof attachScopes;
export type CreateFilter = typeof createFilter;
export type ExtractAssignedNames = typeof extractAssignedNames;
export type MakeLegalIdentifier = typeof makeLegalIdentifier;
export type NormalizePath = typeof normalizePath;
export type DataToEsm = typeof dataToEsm;

declare const defaultExport: {
  addExtension: AddExtension;
  attachScopes: AttachScopes;
  createFilter: CreateFilter;
  dataToEsm: DataToEsm;
  extractAssignedNames: ExtractAssignedNames;
  makeLegalIdentifier: MakeLegalIdentifier;
  normalizePath: NormalizePath;
};
export default defaultExport;
