// Inlined to avoid extra dependency (chokidar is bundled in the published build)

// https://github.com/paulmillr/chokidar/blob/master/types/index.d.ts
// MIT Licensed https://github.com/paulmillr/chokidar/blob/master/LICENSE

/**
The MIT License (MIT)

Copyright (c) 2012-2019 Paul Miller (https://paulmillr.com), Elan Shanker

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the “Software”), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
*/
/// <reference types="node" />

import type * as fs from 'node:fs'
import { EventEmitter } from 'node:events'
import type { Matcher } from './anymatch'

export class FSWatcher extends EventEmitter implements fs.FSWatcher {
  options: WatchOptions

  /**
   * Constructs a new FSWatcher instance with optional WatchOptions parameter.
   */
  constructor(options?: WatchOptions)

  /**
   * Add files, directories, or glob patterns for tracking. Takes an array of strings or just one
   * string.
   */
  add(paths: string | ReadonlyArray<string>): this

  /**
   * Stop watching files, directories, or glob patterns. Takes an array of strings or just one
   * string.
   */
  unwatch(paths: string | ReadonlyArray<string>): this

  /**
   * Returns an object representing all the paths on the file system being watched by this
   * `FSWatcher` instance. The object's keys are all the directories (using absolute paths unless
   * the `cwd` option was used), and the values are arrays of the names of the items contained in
   * each directory.
   */
  getWatched(): {
    [directory: string]: string[]
  }

  /**
   * Removes all listeners from watched files.
   */
  close(): Promise<void>

  on(
    event: 'add' | 'addDir' | 'change',
    listener: (path: string, stats?: fs.Stats) => void
  ): this

  on(
    event: 'all',
    listener: (
      eventName: 'add' | 'addDir' | 'change' | 'unlink' | 'unlinkDir',
      path: string,
      stats?: fs.Stats
    ) => void
  ): this

  /**
   * Error occurred
   */
  on(event: 'error', listener: (error: Error) => void): this

  /**
   * Exposes the native Node `fs.FSWatcher events`
   */
  on(
    event: 'raw',
    listener: (eventName: string, path: string, details: any) => void
  ): this

  /**
   * Fires when the initial scan is complete
   */
  on(event: 'ready', listener: () => void): this

  on(event: 'unlink' | 'unlinkDir', listener: (path: string) => void): this

  on(event: string, listener: (...args: any[]) => void): this
}

export interface WatchOptions {
  /**
   * Indicates whether the process should continue to run as long as files are being watched. If
   * set to `false` when using `fsevents` to watch, no more events will be emitted after `ready`,
   * even if the process continues to run.
   */
  persistent?: boolean

  /**
   * ([anymatch](https://github.com/micromatch/anymatch)-compatible definition) Defines files/paths to
   * be ignored. The whole relative or absolute path is tested, not just filename. If a function
   * with two arguments is provided, it gets called twice per path - once with a single argument
   * (the path), second time with two arguments (the path and the
   * [`fs.Stats`](https://nodejs.org/api/fs.html#fs_class_fs_stats) object of that path).
   */
  ignored?: Matcher

  /**
   * If set to `false` then `add`/`addDir` events are also emitted for matching paths while
   * instantiating the watching as chokidar discovers these file paths (before the `ready` event).
   */
  ignoreInitial?: boolean

  /**
   * When `false`, only the symlinks themselves will be watched for changes instead of following
   * the link references and bubbling events through the link's path.
   */
  followSymlinks?: boolean

  /**
   * The base directory from which watch `paths` are to be derived. Paths emitted with events will
   * be relative to this.
   */
  cwd?: string

  /**
   * If set to true then the strings passed to .watch() and .add() are treated as literal path
   * names, even if they look like globs.
   *
   * @default false
   */
  disableGlobbing?: boolean

  /**
   * Whether to use fs.watchFile (backed by polling), or fs.watch. If polling leads to high CPU
   * utilization, consider setting this to `false`. It is typically necessary to **set this to
   * `true` to successfully watch files over a network**, and it may be necessary to successfully
   * watch files in other non-standard situations. Setting to `true` explicitly on OS X overrides
   * the `useFsEvents` default.
   */
  usePolling?: boolean

  /**
   * Whether to use the `fsevents` watching interface if available. When set to `true` explicitly
   * and `fsevents` is available this supercedes the `usePolling` setting. When set to `false` on
   * OS X, `usePolling: true` becomes the default.
   */
  useFsEvents?: boolean

  /**
   * If relying upon the [`fs.Stats`](https://nodejs.org/api/fs.html#fs_class_fs_stats) object that
   * may get passed with `add`, `addDir`, and `change` events, set this to `true` to ensure it is
   * provided even in cases where it wasn't already available from the underlying watch events.
   */
  alwaysStat?: boolean

  /**
   * If set, limits how many levels of subdirectories will be traversed.
   */
  depth?: number

  /**
   * Interval of file system polling.
   */
  interval?: number

  /**
   * Interval of file system polling for binary files. ([see list of binary extensions](https://gi
   * thub.com/sindresorhus/binary-extensions/blob/master/binary-extensions.json))
   */
  binaryInterval?: number

  /**
   *  Indicates whether to watch files that don't have read permissions if possible. If watching
   *  fails due to `EPERM` or `EACCES` with this set to `true`, the errors will be suppressed
   *  silently.
   */
  ignorePermissionErrors?: boolean

  /**
   * `true` if `useFsEvents` and `usePolling` are `false`. Automatically filters out artifacts
   * that occur when using editors that use "atomic writes" instead of writing directly to the
   * source file. If a file is re-added within 100 ms of being deleted, Chokidar emits a `change`
   * event rather than `unlink` then `add`. If the default of 100 ms does not work well for you,
   * you can override it by setting `atomic` to a custom value, in milliseconds.
   */
  atomic?: boolean | number

  /**
   * can be set to an object in order to adjust timing params:
   */
  awaitWriteFinish?: AwaitWriteFinishOptions | boolean
}

export interface AwaitWriteFinishOptions {
  /**
   * Amount of time in milliseconds for a file size to remain constant before emitting its event.
   */
  stabilityThreshold?: number

  /**
   * File size polling interval.
   */
  pollInterval?: number
}

/**
 * produces an instance of `FSWatcher`.
 */
export function watch(
  paths: string | ReadonlyArray<string>,
  options?: WatchOptions
): FSWatcher