import type { FilePath } from "@parcel/types";
import type { Readable, Writable } from "stream";
import type { Event, Options as WatcherOptions, AsyncSubscription } from "@parcel/watcher";
export type FileOptions = {
  mode?: number;
};
export type ReaddirOptions = {
  withFileTypes?: false;
} | {
  withFileTypes: true;
};
export interface Stats {
  dev: number;
  ino: number;
  mode: number;
  nlink: number;
  uid: number;
  gid: number;
  rdev: number;
  size: number;
  blksize: number;
  blocks: number;
  atimeMs: number;
  mtimeMs: number;
  ctimeMs: number;
  birthtimeMs: number;
  atime: Date;
  mtime: Date;
  ctime: Date;
  birthtime: Date;
  isFile(): boolean;
  isDirectory(): boolean;
  isBlockDevice(): boolean;
  isCharacterDevice(): boolean;
  isSymbolicLink(): boolean;
  isFIFO(): boolean;
  isSocket(): boolean;
}
export type Encoding = "hex" | "utf8" | "utf-8" | "ascii" | "binary" | "base64" | "ucs2" | "ucs-2" | "utf16le" | "latin1";
export interface FileSystem {
  readFile(filePath: FilePath): Promise<Buffer>;
  readFile(filePath: FilePath, encoding: Encoding): Promise<string>;
  readFileSync(filePath: FilePath): Buffer;
  readFileSync(filePath: FilePath, encoding: Encoding): string;
  writeFile(filePath: FilePath, contents: Buffer | string, options: FileOptions | null | undefined): Promise<void>;
  copyFile(source: FilePath, destination: FilePath, flags?: number): Promise<void>;
  stat(filePath: FilePath): Promise<Stats>;
  statSync(filePath: FilePath): Stats;
  readdir(path: FilePath, opts?: {
    withFileTypes?: false;
  }): Promise<FilePath[]>;
  readdir(path: FilePath, opts: {
    withFileTypes: true;
  }): Promise<Dirent[]>;
  readdirSync(path: FilePath, opts?: {
    withFileTypes?: false;
  }): FilePath[];
  readdirSync(path: FilePath, opts: {
    withFileTypes: true;
  }): Dirent[];
  unlink(path: FilePath): Promise<void>;
  realpath(path: FilePath): Promise<FilePath>;
  realpathSync(path: FilePath): FilePath;
  exists(path: FilePath): Promise<boolean>;
  existsSync(path: FilePath): boolean;
  mkdirp(path: FilePath): Promise<void>;
  rimraf(path: FilePath): Promise<void>;
  ncp(source: FilePath, destination: FilePath): Promise<void>;
  createReadStream(path: FilePath, options?: FileOptions | null | undefined): Readable;
  createWriteStream(path: FilePath, options?: FileOptions | null | undefined): Writable;
  cwd(): FilePath;
  chdir(dir: FilePath): void;
  watch(dir: FilePath, fn: (err: Error | null | undefined, events: Array<Event>) => unknown, opts: WatcherOptions): Promise<AsyncSubscription>;
  getEventsSince(dir: FilePath, snapshot: FilePath, opts: WatcherOptions): Promise<Array<Event>>;
  writeSnapshot(dir: FilePath, snapshot: FilePath, opts: WatcherOptions): Promise<void>;
  findAncestorFile(fileNames: Array<string>, fromDir: FilePath, root: FilePath): FilePath | null | undefined;
  findNodeModule(moduleName: string, fromDir: FilePath): FilePath | null | undefined;
  findFirstFile(filePaths: Array<FilePath>): FilePath | null | undefined;
}
// https://nodejs.org/api/fs.html#fs_class_fs_dirent
export interface Dirent {
  readonly name: string;
  isBlockDevice(): boolean;
  isCharacterDevice(): boolean;
  isDirectory(): boolean;
  isFIFO(): boolean;
  isFile(): boolean;
  isSocket(): boolean;
  isSymbolicLink(): boolean;
}