import express from "express";
import cors from "cors";
import path from "path";
import { fileURLToPath } from "url";
import healthRouter from "./routes/health.js";
import authRouter from "./routes/auth.js";
import vendorsRouter from "./routes/vendors.js";
import usersRouter from "./routes/users.js";
import categoriesRouter from "./routes/categories.js";
import taxesRouter from "./routes/taxes.js";
import productsRouter from "./routes/products.js";
import { errorHandler } from "./middleware/errorHandler.js";

const __filename = fileURLToPath(import.meta.url);
const __dirname = path.dirname(__filename);

export function createApp() {
  const app = express();

  app.use(
    cors({
      origin: process.env.CORS_ORIGIN ?? "*",
      credentials: true,
    })
  );
  app.use(express.json());
  app.use(express.urlencoded({ extended: true }));

  // API routes
  app.use("/api/v1", healthRouter);
  app.use("/api/v1/auth", authRouter);
  app.use("/api/v1/vendors", vendorsRouter);
  app.use("/api/v1/users", usersRouter);
  app.use("/api/v1/categories", categoriesRouter);
  app.use("/api/v1/taxes", taxesRouter);
  app.use("/api/v1/products", productsRouter);

  // Serve React admin UI static assets in production
  if (process.env.NODE_ENV === "production") {
    const clientDist = path.join(__dirname, "../../client/dist");
    app.use(express.static(clientDist));
    app.get(/^(?!\/api).*/, (_req, res) => {
      res.sendFile(path.join(clientDist, "index.html"));
    });
  }

  app.use(errorHandler);

  return app;
}
