import express, { type Express } from "express";
import fs from "fs";
import path from "path";

export function serveStatic(app: Express) {
  const distPath =
    process.env.NODE_ENV === "development"
      ? path.resolve(import.meta.dirname, "../..", "dist", "public")
      : path.resolve(import.meta.dirname, "..", "public");
  if (!fs.existsSync(distPath)) {
    console.error(
      `Could not find the build directory: ${distPath}, make sure to build the client first`
    );
  }

  app.use(express.static(distPath, { index: false }));

  app.use("*", (req, res) => {
    // Missing files under /assets or any path with an extension must return 404.
    // Falling back to index.html causes browsers to report MIME errors on stale chunks.
    const requestPath = req.originalUrl.split("?")[0];
    if (path.extname(requestPath)) {
      res.status(404).type("text/plain").send("Not found");
      return;
    }

    res.sendFile(path.resolve(distPath, "index.html"));
  });
}