/* @flow */

declare module 'next' {
  declare type NextApp = {
    prepare(): Promise<void>,
    getRequestHandler(): any,
    render(req: any, res: any, pathname: string, query: any): any,
    renderToHTML(req: any, res: any, pathname: string, query: string): string,
    renderError(err: Error, req: any, res: any, pathname: any, query: any): any,
    renderErrorToHTML(err: Error, req: any, res: any, pathname: string, query: any): string,
  };
  declare module.exports: (...opts: any) => NextApp;
}

declare module 'next/head' {
  declare module.exports: Class<React$Component<void, any, any>>;
}

declare module 'next/link' {
  declare module.exports: Class<React$Component<void, { href: string, prefetch?: boolean }, any>>;
}

declare module 'next/error' {
  declare module.exports: Class<React$Component<void, { statusCode: number }, any>>;
}

declare module 'next/router' {
  declare module.exports: {
    route: string,
    pathname: string,
    query: Object,
    onRouteChangeStart: ?(url: string) => void,
    onRouteChangeComplete: ?(url: string) => void,
    onRouteChangeError: ?(err: Error & { cancelled: boolean }, url: string) => void,
    push(url: string, as: ?string): Promise<boolean>,
    replace(url: string, as: ?string): Promise<boolean>,
  };
}

declare module 'next/document' {
  declare export var Head: Class<React$Component<void, any, any>>;
  declare export var Main: Class<React$Component<void, any, any>>;
  declare export var NextScript: Class<React$Component<void, any, any>>;
  declare export default Class<React$Component<void, any, any>> & {
    getInitialProps: (ctx: {
      pathname: string,
      query: any,
      req?: any,
      res?: any,
      jsonPageRes?: any,
      err?: any,
    }) => Promise<any>,
    renderPage(cb: Function): void,
  }
}