import "dotenv/config";
import express from "express";
import path from "node:path";
import { createServer as createViteServer } from "vite";
import { contentRouter } from "./src/backend/http/contentRouter";
import { controlRouter } from "./src/backend/http/controlRouter";
import { gitSourceRouter } from "./src/backend/http/gitSourceRouter";
import { previewRouter } from "./src/backend/http/previewRouter";

const parsePort = (value: string): number => {
  const port = Number.parseInt(value, 10);
  if (!Number.isInteger(port) || port < 1 || port > 65_535) {
    throw new Error(`Invalid PORT value: ${value}`);
  }
  return port;
};

async function startServer(): Promise<void> {
  const app = express();
  const port = parsePort(process.env.PORT ?? "3000");
  const host = process.env.HOST ?? "127.0.0.1";

  app.disable("x-powered-by");
  app.set("trust proxy", process.env.TRUST_PROXY ?? "loopback");
  app.use(express.json({ limit: "1mb" }));
  app.use("/api", controlRouter);
  app.use("/api", gitSourceRouter);
  app.use("/api", contentRouter);
  app.use("/api", previewRouter);

  if (process.env.NODE_ENV !== "production") {
    const vite = await createViteServer({
      server: { middlewareMode: true },
      appType: "spa",
    });
    app.use(vite.middlewares);
  } else {
    const distPath = path.join(process.cwd(), "dist");
    app.use(express.static(distPath));
    app.get("*", (_req, res) => {
      res.sendFile(path.join(distPath, "index.html"));
    });
  }

  app.listen(port, host, () => {
    console.log(`Labyricorn Control Plane running on http://${host}:${port}`);
  });
}

startServer().catch((error) => {
  console.error(error);
  process.exitCode = 1;
});