import express from "express";
import path from "path";
import fs from "fs";
import { createServer as createViteServer } from "vite";
import { defaultCMSData } from "./src/data/defaultCMS.js";

const app = express();
const PORT = 3000;
const DATA_FILE = path.join(process.cwd(), "cms-data.json");

app.use(express.json({ limit: "10mb" }));

// Helper to read persistent CMS data
function loadCMSData() {
  try {
    if (fs.existsSync(DATA_FILE)) {
      const raw = fs.readFileSync(DATA_FILE, "utf-8");
      return JSON.parse(raw);
    }
  } catch (err) {
    console.error("Failed to load CMS file, using defaults:", err);
  }
  return defaultCMSData;
}

// Helper to save CMS data
function saveCMSData(data: any) {
  try {
    fs.writeFileSync(DATA_FILE, JSON.stringify(data, null, 2), "utf-8");
  } catch (err) {
    console.error("Failed to save CMS file:", err);
  }
}

// Initialize file if not existing
if (!fs.existsSync(DATA_FILE)) {
  saveCMSData(defaultCMSData);
}

// CMS API Routes
app.get("/api/cms", (req, res) => {
  const data = loadCMSData();
  res.json(data);
});

app.post("/api/cms", (req, res) => {
  const newCMS = req.body;
  if (!newCMS || typeof newCMS !== "object") {
    return res.status(400).json({ error: "Invalid CMS data payload" });
  }
  saveCMSData(newCMS);
  res.json({ success: true, data: newCMS });
});

app.post("/api/cms/reset", (req, res) => {
  saveCMSData(defaultCMSData);
  res.json({ success: true, data: defaultCMSData });
});

// Start Express + Vite Dev or Production static server
async function start() {
  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, "0.0.0.0", () => {
    console.log(`[Gothic2 Mod Server] Running on http://0.0.0.0:${PORT}`);
  });
}

start();