// run with `bun run index.js`

import { Database } from "bun:sqlite";
import { serve } from "bun";

export class App {
  constructor(db) {
    this.db = db;
  }

  async handleShorten(req) {
    const { targetUrl, sid: customSid } = await req.json();
    const sid =
      customSid ||
      Buffer.from(crypto.getRandomValues(new Uint8Array(6)))
        .toString("base64url")
        .substring(0, 8);

    this.db.run(`INSERT INTO urls(sid, originalURL) VALUES(?, ?)`, [
      sid,
      targetUrl,
    ]);

    return Response.json({
      status: "success",
      shortUrl: `http://localhost:9172/${sid}`,
    });
  }

  async handleHealthz() {
    return Response.json({ msg: "OK" });
  }
}

const db = new Database(":memory:");
const app = new App(db);

db.run(`
  CREATE TABLE IF NOT EXISTS urls (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    sid TEXT UNIQUE,
    originalURL TEXT NOT NULL
  )
`);

const server = serve({
  port: 9173,
  routes: {
    "/api/healthz": app.handleHealthz, // WORKS
    "/api/shorten": app.handleShorten, // DOES NOT WORK
    // "/api/shorten": (req) => app.handleShorten(req) // WORKS
  },
});

console.log(`server running at ${server.url}`);