declare var internalBinding: any;

declare const BUILDFLAG: (flag: boolean) => boolean;

declare const ENABLE_DESKTOP_CAPTURER: boolean;
declare const ENABLE_ELECTRON_EXTENSIONS: boolean;
declare const ENABLE_REMOTE_MODULE: boolean;
declare const ENABLE_VIEW_API: boolean;

declare namespace NodeJS {
  interface FeaturesBinding {
    isBuiltinSpellCheckerEnabled(): boolean;
    isDesktopCapturerEnabled(): boolean;
    isOffscreenRenderingEnabled(): boolean;
    isRemoteModuleEnabled(): boolean;
    isPDFViewerEnabled(): boolean;
    isRunAsNodeEnabled(): boolean;
    isFakeLocationProviderEnabled(): boolean;
    isViewApiEnabled(): boolean;
    isTtsEnabled(): boolean;
    isPrintingEnabled(): boolean;
    isPictureInPictureEnabled(): boolean;
    isExtensionsEnabled(): boolean;
    isComponentBuild(): boolean;
  }

  interface IpcRendererBinding {
    send(internal: boolean, channel: string, args: any[]): void;
    sendSync(internal: boolean, channel: string, args: any[]): any;
    sendToHost(channel: string, args: any[]): void;
    sendTo(internal: boolean, sendToAll: boolean, webContentsId: number, channel: string, args: any[]): void;
    invoke<T>(internal: boolean, channel: string, args: any[]): Promise<{ error: string, result: T }>;
    postMessage(channel: string, message: any, transferables: MessagePort[]): void;
  }

  interface V8UtilBinding {
    getHiddenValue<T>(obj: any, key: string): T;
    setHiddenValue<T>(obj: any, key: string, value: T): void;
    deleteHiddenValue(obj: any, key: string): void;
    requestGarbageCollectionForTesting(): void;
    createIDWeakMap<V>(): ElectronInternal.KeyWeakMap<number, V>;
    createDoubleIDWeakMap<V>(): ElectronInternal.KeyWeakMap<[string, number], V>;
    setRemoteCallbackFreer(fn: Function, frameId: number, contextId: String, id: number, sender: any): void
    weaklyTrackValue(value: any): void;
    clearWeaklyTrackedValues(): void;
    getWeaklyTrackedValues(): any[];
    triggerFatalErrorForTesting(): void;
  }

  interface Process {
    /**
     * DO NOT USE DIRECTLY, USE process.electronBinding
     */
    _linkedBinding(name: string): any;
    electronBinding(name: string): any;
    electronBinding(name: 'features'): FeaturesBinding;
    electronBinding(name: 'ipc'): { ipc: IpcRendererBinding };
    electronBinding(name: 'v8_util'): V8UtilBinding;
    electronBinding(name: 'app'): { app: Electron.App, App: Function };
    electronBinding(name: 'command_line'): Electron.CommandLine;
    electronBinding(name: 'desktop_capturer'): { createDesktopCapturer(): ElectronInternal.DesktopCapturer };
    log: NodeJS.WriteStream['write'];
    activateUvLoop(): void;

    // Additional events
    once(event: 'document-start', listener: () => any): this;
    once(event: 'document-end', listener: () => any): this;

    // Additional properties
    _firstFileName?: string;

    helperExecPath: string;
    isRemoteModuleEnabled: boolean;
  }
}

declare module NodeJS  {
  interface Global {
    require: NodeRequire;
    module: NodeModule;
    __filename: string;
    __dirname: string;
  }
}

interface ContextMenuItem {
  id: number;
  label: string;
  type: 'normal' | 'separator' | 'subMenu' | 'checkbox';
  checked: boolean;
  enabled: boolean;
  subItems: ContextMenuItem[];
}

declare interface Window {
  ELECTRON_DISABLE_SECURITY_WARNINGS?: boolean;
  ELECTRON_ENABLE_SECURITY_WARNINGS?: boolean;
  InspectorFrontendHost?: {
    showContextMenuAtPoint: (x: number, y: number, items: ContextMenuItem[]) => void
  };
  DevToolsAPI?: {
    contextMenuItemSelected: (id: number) => void;
    contextMenuCleared: () => void
  };
  UI?: {
    createFileSelectorElement: (callback: () => void) => HTMLSpanElement
  };
  Persistence?: {
    FileSystemWorkspaceBinding: {
      completeURL: (project: string, path: string) => string;
    }
  };
  ResizeObserver: ResizeObserver;
}

/**
 * The ResizeObserver interface is used to observe changes to Element's content
 * rect.
 *
 * It is modeled after MutationObserver and IntersectionObserver.
 */
declare class ResizeObserver {
  constructor (callback: ResizeObserverCallback);

  /**
   * Adds target to the list of observed elements.
   */
  observe: (target: Element) => void;

  /**
   * Removes target from the list of observed elements.
   */
  unobserve: (target: Element) => void;

  /**
   * Clears both the observationTargets and activeTargets lists.
   */
  disconnect: () => void;
}

/**
 * This callback delivers ResizeObserver's notifications. It is invoked by a
 * broadcast active observations algorithm.
 */
interface ResizeObserverCallback {
  (entries: ResizeObserverEntry[], observer: ResizeObserver): void;
}

interface ResizeObserverEntry {
  /**
   * @param target The Element whose size has changed.
   */
  new (target: Element): ResizeObserverEntry;

  /**
   * The Element whose size has changed.
   */
  readonly target: Element;

  /**
   * Element's content rect when ResizeObserverCallback is invoked.
   */
  readonly contentRect: DOMRectReadOnly;
}
