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import type { DirMetadata } from "./types.ts";
import {  Application,  colors,  cors,  flags,  fs,  Header,  logger,  MIME,  NotFoundException,  path,} from "./deps.ts";const { readFile, emit, cwd, stat, args, exit, writeTextFile } = Deno;const { join } = path;const { exists, ensureDir } = fs;const { parse } = flags;const { green } = colors;const hasOwnProperty = Object.prototype.hasOwnProperty;
interface ServerArgs {  _: string[];  // -p --port  p: number;  port: number;  // --tsconfig  tsconfig: string;  // --template  template: string;  // -h --help  h: boolean;  help: boolean;}
const serverArgs = parse(args) as ServerArgs;
if (serverArgs.h ?? serverArgs.help) {  console.log(`Dev ServerINSTALL:  deno install -A --unstable https://deno.land/x/dev_server/mod.tsUSAGE:  dev_server [path] [options]OPTIONS:  -h, --help          Prints help information  -p, --port <port>   Set port  --tsconfig <path>   Path to tsconfig.json  --template <name>   Create app with template`);  exit();}
const port = serverArgs.port ?? serverArgs.p ?? 8080;const target = join(cwd(), serverArgs._[0] ?? ".");const tsconfigPath = join(target, serverArgs.tsconfig ?? "tsconfig.json");let compilerOptions: Deno.CompilerOptions = {};
if (typeof serverArgs.template === "string") {  const templateMetadata: DirMetadata = await fetch(    "https://deno.land/x/dev_server/template.json",  ).then((resp) => resp.json());
  const url = "https://deno.land/x/dev_server/template";
  if (hasOwnProperty.call(templateMetadata, serverArgs.template)) {    const template = templateMetadata[serverArgs.template];    const processes: Promise<unknown>[] = [];    if (typeof template === "object") {      await createDirFromMetadata(        target,        `${url}/${serverArgs.template}`,        template,      );    }    await Promise.all(processes);
    async function createDirFromMetadata(      localPath: string,      resourcePath: string,      metadata: DirMetadata,    ) {      await ensureDir(localPath);      for (const k in metadata) {        const maybeMetadata = metadata[k];        const lp = join(localPath, k);        const rp = `${resourcePath}/${k}`;        if (typeof maybeMetadata === "object") {          await createDirFromMetadata(lp, rp, maybeMetadata);        } else {          const p = fetch(rp)            .then((resp) => resp.text())            .then((data) => writeTextFile(lp, data))            .then(() => console.log(`${green("Create")} ${lp}`));
          processes.push(p);        }      }    }  }}
if (await exists(tsconfigPath)) {  const tsconfig: { compilerOptions: Deno.CompilerOptions } = JSON.parse(    decode(await readFile(tsconfigPath)),  );  if (hasOwnProperty.call(tsconfig, "compilerOptions")) {    compilerOptions = { ...compilerOptions, ...tsconfig.compilerOptions };  }}
const app = new Application();app.start({ port, hostname: "0.0.0.0" });console.log(`Server running at http://0.0.0.0:${port}/`);
app  .use(logger())  .use(cors())  .get("/", (c) => {    return c.redirect("/index.html");  })  .get("/*", async (c) => {    const p = join(target, c.path);    if (!(await exists(p)) || (await stat(p)).isDirectory) {      throw new NotFoundException();    }    const f = await readFile(p);    if (/\.[j|t]sx?$/.test(c.path)) {      c.response.headers.set(        Header.ContentType,        MIME.ApplicationJavaScriptCharsetUTF8,      );      return transform(p);    } else if (c.path === "/index.html") {      return c.htmlBlob(f);    }
    c.blob(f);  });
async function transform(rootName: string) {  console.log(rootName);  const result = await emit(    rootName,    {      bundle: "esm",      check: true,      compilerOptions,    },  );  return result.files["deno:///bundle.js"];}
function decode(b: Uint8Array) {  return new TextDecoder().decode(b);}