const express = require("express");
const multer = require("multer");
const path = require("path");

const app = express();
const PORT = 3000;

// Serve static files (frontend)
app.use(express.static(path.join(__dirname, "public")));

// Configure Multer for file storage
const storage = multer.diskStorage({
  destination: (req, file, cb) => {
    cb(null, "uploads/"); // Destination folder for uploaded files
  },
  filename: (req, file, cb) => {
    cb(null, Date.now() + "-" + file.originalname); // Unique file name
  },
});

const upload = multer({
  storage: storage,
  limits: { fileSize: 500 * 1024 * 1024 }, // 500MB limit
}).single("file");

// File upload endpoint
app.post("/upload", (req, res) => {
  upload(req, res, (err) => {
    if (err) {
      if (err.code === "LIMIT_FILE_SIZE") {
        return res.status(400).json({ error: "File size exceeds 500MB limit" });
      }
      return res.status(500).json({ error: "File upload failed" });
    }

    // Generate a streaming link
    const fileUrl = `${req.protocol}://${req.get("host")}/uploads/${req.file.filename}`;
    res.json({ message: "File uploaded successfully", link: fileUrl });
  });
});

// Serve uploaded files
app.use("/uploads", express.static(path.join(__dirname, "uploads")));

// Start the server
app.listen(PORT, () => {
  console.log(`Server is running at http://localhost:${PORT}`);
});