import { Express, Application, Request, Response } from "express";
import { Server } from "http";
import { Server as HttpsServer } from "https";
import { ServeStaticOptions } from "serve-static";

interface RenderParams {
  req: Request;
  res: Response;
}

interface RenderVueParams extends RenderParams, Record<string, any> {}

interface RenderError extends Error {
  code: Response["statusCode"];
  url: Request["url"];
}

interface RenderErrorParams extends RenderParams {
  err: RenderError;
}

interface SsrMiddlewareResolve {
  /**
   * Whenever you define a route (with app.use(), app.get(), app.post() etc), you should use the resolve.urlPath() method so that you'll also keep into account the configured publicPath (quasar.config file > build > publicPath).
   */
  urlPath(url: string): string;
  /**
   * Resolve folder path to the root (of the project in dev and of the distributables in production). Under the hood, it does a path.join()
   * @param paths paths to join
   */
  root(...paths: string[]): string;
  /**
   * Resolve folder path to the "public" folder. Under the hood, it does a path.join()
   * @param paths paths to join
   */
  public(...paths: string[]): string;
}

interface SsrMiddlewareFolders {
  root: string;
  public: string;
}

interface SsrCreateParams {
  /**
   * Terminal PORT env var or the default configured port
   * for the SSR webserver
   */
  port: number;
  resolve: SsrMiddlewareResolve;
  publicPath: string;
  folders: SsrMiddlewareFolders;
  /**
   * Uses Vue and Vue Router to render the requested URL path.
   * @returns the rendered HTML string to return to the client
   */
  render: (ssrContext: RenderVueParams) => Promise<string>;
}

export type SsrCreateCallback = (
  params: SsrCreateParams
) => Express | Application | any | Promise<Express> | Promise<Application> | Promise<any>;

interface ssrServeStaticContentParams extends SsrCreateParams {
  app: Express | Application | any;
}

interface SsrServeStaticFnParams {
  /**
   * The URL path to serve the static content at (without publicPath).
  * @default '/'
   */
  urlPath?: string;
  /**
   * The sub-path from the publicFolder or an absolute path.
   * @default '.' (public folder itself)
   */
  pathToServe?: string;
  /**
   * Other custom options...
   */
  opts?: ServeStaticOptions<Response>;
}

type SsrServeStaticFn = (params: SsrServeStaticFnParams) => void | Promise<void>;

export type SsrServeStaticContentCallback = (
  params: ssrServeStaticContentParams
) => SsrServeStaticFn;

interface SsrMiddlewareServe {
  /**
   * It's essentially a wrapper over express.static() with a few convenient tweaks:
   * - the pathToServe is a path resolved to the "public" folder out of the box
   * - the opts are the same as for express.static()
   * - opts.maxAge is used by default, taking into account the quasar.config file > ssr > maxAge configuration; this sets how long the respective file(s) can live in browser's cache
   */
  static: SsrServeStaticFn;
  /**
   * Displays a wealth of useful debug information (including the stack trace).
   * Warning: It's available only in development and NOT in production.
   */
  error(ssrContext: RenderErrorParams): void;
}

interface SsrMiddlewareParams extends ssrServeStaticContentParams {
  serve: SsrMiddlewareServe;
  /**
   * If you use HTTPS in development, this will be the
   * actual server that listens for clients.
   * It is a Node https.Server instance wrapper over the original "app".
   */
  devHttpsApp?: HttpsServer;
}

export type SsrMiddlewareCallback = (
  params: SsrMiddlewareParams
) => void | Promise<void>;

interface SsrListenHandlerResult {
  handler: Server | Application | void;
}

export type SsrListenCallback = (
  params: SsrMiddlewareParams
) => Server | Application | SsrListenHandlerResult | any | Promise<Server> | Promise<Application> | Promise<SsrListenHandlerResult> | Promise<any>;

interface SsrCloseParams extends SsrMiddlewareParams {
  listenResult: Server | Application | SsrListenHandlerResult | any;
}

export type SsrCloseCallback = (
  params: SsrCloseParams
) => Server | Application | SsrListenHandlerResult | any | Promise<Server> | Promise<Application> | Promise<SsrListenHandlerResult> | Promise<any>;

interface SsrRenderPreloadTagCallbackOptions {
  ssrContext: RenderVueParams;
}

export type SsrRenderPreloadTagCallback = (
  file: string,
  options: SsrRenderPreloadTagCallbackOptions
) => string;