import path from "node:path";
import fs from "node:fs";
import { RelayServer } from "./relay/index.js";
import { loadDbConfig, createStores } from "./relay/db/index.js";

const port = parseInt(process.env.PORT ?? "8080", 10);
const host = process.env.HOST ?? "0.0.0.0";

async function main() {
  // Load saved database config (if any)
  const dbConfig = loadDbConfig();
  let stores;
  if (dbConfig) {
    console.log(`Loading ${dbConfig.type} database...`);
    stores = await createStores(dbConfig);
  } else {
    console.log("No database configured — starting with in-memory storage.");
    console.log("Configure a database during setup to enable persistent storage.");
  }

  // Resolve frontend public directory: check ./public (production) then ../web/dist (development)
  let publicDir: string | undefined;
  const candidates = [
    path.resolve("public"),
    path.resolve(__dirname, "..", "web", "dist"),
  ];
  for (const dir of candidates) {
    if (fs.existsSync(path.join(dir, "index.html"))) {
      publicDir = dir;
      break;
    }
  }

  const server = new RelayServer({ port, host, stores, publicDir });

  await server.start();
  console.log(`CookieBridge relay server listening on ${host}:${port}`);
  if (publicDir) {
    console.log(`Serving admin UI from ${publicDir}`);
  } else {
    console.log("No frontend build found — admin UI not available. Run: npm run build:web");
  }

  process.on("SIGINT", async () => {
    console.log("\nShutting down...");
    await server.stop();
    process.exit(0);
  });

  process.on("SIGTERM", async () => {
    await server.stop();
    process.exit(0);
  });
}

main().catch((err) => {
  console.error("Failed to start server:", err);
  process.exit(1);
});