const express = require("express");
const mongoose = require("mongoose");
const multer = require("multer");
const cors = require("cors");
const fs = require("fs");

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

app.use("/uploads", express.static("uploads"));
mongoose.connect("mongodb://mongo:27017/notes");

const Note = mongoose.model("Note", { text: String });

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

const upload = multer({ storage });

app.get("/notes", async (req, res) => {
  res.json(await Note.find());
});

app.post("/notes", async (req, res) => {
  const note = new Note(req.body);
  await note.save();
  res.json(note);
});

app.post("/upload", upload.single("file"), (req, res) => {
  res.json({ message: "Uploaded" });
});

app.listen(3000, () => console.log("Backend running"));

app.get("/", (req, res) => {
  res.send("Backend is running");
});

app.delete("/notes/:id", async (req, res) => {
  await Note.findByIdAndDelete(req.params.id);
  res.json({ message: "Deleted" });
});

app.get("/files", (req, res) => {
  fs.readdir("uploads/", (err, files) => {
    if (err) return res.status(500).send("Error");
    res.json(files);
  });
});