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

export function log(message: string, source = "express") {
  const formattedTime = new Date().toLocaleTimeString("en-US", {
    hour: "numeric",
    minute: "2-digit",
    second: "2-digit",
    hour12: true,
  });

  console.log(`${formattedTime} [${source}] ${message}`);
}

export function serveStatic(app: Express) {
  const distPath = path.resolve(import.meta.dirname, "public");

  if (!fs.existsSync(distPath)) {
    throw new Error(
      `Could not find the build directory: ${distPath}, make sure to build the client first`,
    );
  }

  // Serve static assets with long cache (they have content hashes in filenames)
  app.use("/assets", express.static(path.join(distPath, "assets"), {
    maxAge: '1y',
    immutable: true
  }));

  // Serve other static files with no-cache for HTML
  app.use(express.static(distPath, {
    setHeaders: (res, filePath) => {
      if (filePath.endsWith('.html')) {
        res.setHeader('Cache-Control', 'no-cache, no-store, must-revalidate');
      }
    }
  }));

  // fall through to index.html if the file doesn't exist (with no-cache)
  app.use("*", (_req, res) => {
    res.setHeader('Cache-Control', 'no-cache, no-store, must-revalidate');
    res.sendFile(path.resolve(distPath, "index.html"));
  });
}