import express from "express";
import multer from "multer";
import Link from "../models/Link.js";
import { authMiddleware } from "../middleware/auth.js";

const router = express.Router();

// Config upload
const storage = multer.diskStorage({
  destination: "uploads/",
  filename: (req, file, cb) => {
    const unique = Date.now() + "-" + file.originalname;
    cb(null, unique);
  }
});
const upload = multer({ storage });

// Tutte le rotte protette
router.use(authMiddleware);

// GET /links - lista dei link dell'utente
router.get("/", async (req, res) => {
  const links = await Link.find({ owner: req.userId });
  res.json(links);
});

// POST /links - crea nuovo link con eventuale icona
router.post("/", upload.single("icon"), async (req, res) => {
  const { url, name } = req.body;
  const iconPath = req.file ? `/uploads/${req.file.filename}` : null;

  const link = await Link.create({
    url,
    name,
    icon: iconPath,
    owner: req.userId
  });

  res.json(link);
});

// DELETE /links/:id
router.delete("/:id", async (req, res) => {
  const { id } = req.params;

  const link = await Link.findOneAndDelete({
    _id: id,
    owner: req.userId
  });

  if (!link) return res.status(404).json({ error: "Link non trovato" });

  res.json({ success: true });
});

// PUT /links/:id
router.put("/:id", upload.single("icon"), async (req, res) => {
  const { id } = req.params;
  const { name, url } = req.body;

  const update = {};
  if (name) update.name = name;
  if (url) update.url = url;
  if (req.file) update.icon = `/uploads/${req.file.filename}`;

  const link = await Link.findOneAndUpdate(
    { _id: id, owner: req.userId },
    update,
    { new: true }
  );

  if (!link) return res.status(404).json({ error: "Link non trovato" });

  res.json(link);
});

export default router;