#!/usr/bin/env -S deno run --allow-run --allow-net
// Automated bundle server

import { bool } from "https://code.thunderk.net/typescript/functional/raw/1.0.0/all.ts";
import {
  Response,
  serve,
  ServerRequest,
} from "https://deno.land/std@0.79.0/http/server.ts";

export async function processRequest(
  req: ServerRequest,
  runner = Deno.run,
): Promise<Response> {
  const params = req.url.split("/").filter(bool);
  const lib = params[0] || "all";
  const version = params[1] || "master";
  const file = params.length > 2 ? params.slice(2).join("/") : "all";
  const path =
    `https://code.thunderk.net/typescript/${lib}/raw/${version}/${file}.ts`;
  if (!path.match(/^[a-z0-9\/\.\-:_]+$/)) {
    return {
      status: 400,
      body: `console.error("bundler error - Invalid path ${path}");`,
    };
  }

  const process = runner({
    cmd: ["deno", "bundle", path],
    stdout: "piped",
  });
  const output = await process.output();
  const status = await process.status();
  if (status.success) {
    return { body: output };
  } else {
    return {
      status: 500,
      body: `console.error("bundler error - Failed to bundle ${path}");`,
    };
  }
}

export async function serveBundles() {
  const listen = { hostname: "0.0.0.0", port: 8000 };
  const server = serve(listen);
  console.log(`Serving bundles on ${listen.hostname}:${listen.port} ...`);
  for await (const req of server) {
    const response = await processRequest(req);
    await req.respond(response);
  }
}

if (import.meta.main) {
  await serveBundles();
}