const express = require("express");
const cors = require("cors");
const sqlite3 = require("sqlite3").verbose();
const app = express();
require("dotenv").config();

app.use(cors());
app.use(express.json());

const db = new sqlite3.Database("../db.sqlite");

// Beispiel-Route: Link erstellen
app.post("/api/shorten", (req, res) => {
  const { original_url } = req.body;
  const id = Math.random().toString(36).substring(2, 8);
  db.run(
    "INSERT INTO links (id, original_url, created_at) VALUES (?, ?, datetime('now'))",
    [id, original_url],
    (err) => {
      if (err) return res.status(500).json({ error: err.message });
      res.json({ short_url: `http://localhost:3000/${id}` });
      res.json({ id: `${id}`});
    }
  );
});

// Beispiel-Redirect
app.get("/:id", (req, res) => {
  const id = req.params.id;
  db.get("SELECT original_url FROM links WHERE id = ?", [id], (err, row) => {
    if (row) res.redirect(row.original_url);
    else res.status(404).send("Not found");
  });
});

app.listen(3000, () => console.log("Server läuft auf http://localhost:3000"));
