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/* This is an example of how to use an object as a middleware. * `MiddlewareObject` can be ideal for when a middleware needs to encapsulate * large amounts of logic or its own state. */
import { bold, cyan, green, yellow } from "jsr:@std/fmt@0.218/colors";
import {  Application,  composeMiddleware,  type Context,  type MiddlewareObject,  type Next,} from "../mod.ts";
const app = new Application();
class CountingMiddleware implements MiddlewareObject {  #id = 0;  #counter = 0;
  init() {    const array = new Uint32Array(1);    crypto.getRandomValues(array);    this.#id = array[0];  }
  handleRequest(ctx: Context, next: Next) {    ctx.response.headers.set("X-Response-Count", String(this.#counter++));    ctx.response.headers.set("X-Response-Counter-ID", String(this.#id));    return next();  }}
class LoggerMiddleware implements MiddlewareObject {  #composedMiddleware: (context: Context, next: Next) => Promise<unknown>;
  constructor() {    this.#composedMiddleware = composeMiddleware([      this.#handleLogger,      this.#handleResponseTime,    ]);  }
  async #handleLogger(ctx: Context, next: Next) {    await next();    const rt = ctx.response.headers.get("X-Response-Time");    console.log(      `${green(ctx.request.method)} ${cyan(ctx.request.url.pathname)} - ${        bold(          String(rt),        )      }`,    );  }
  async #handleResponseTime(ctx: Context, next: Next) {    const start = Date.now();    await next();    const ms = Date.now() - start;    ctx.response.headers.set("X-Response-Time", `${ms}ms`);  }
  handleRequest(ctx: Context, next: Next) {    return this.#composedMiddleware(ctx, next);  }}
app.use(new CountingMiddleware());app.use(new LoggerMiddleware());
app.use((ctx) => {  ctx.response.body = "Hello World!";});
app.addEventListener("listen", ({ hostname, port, serverType }) => {  console.log(    bold("Start listening on ") + yellow(`${hostname}:${port}`),  );  console.log(bold("  using HTTP server: " + yellow(serverType)));});
await app.listen({ hostname: "127.0.0.1", port: 8000 });console.log(bold("Finished."));