/**
 * @file hub-boundary.test.js
 * @description `server/hub/` (the remote-clients hub, server mode only) is
 * loaded only behind `isServerMode()`: no file outside it may require it,
 * except `server/index.js` on lines that test the mode themselves. And a
 * local-mode app really leaves it out — no module under `server/hub/` is in
 * the require cache after `createApp()` in local mode.
 * @author Nguyễn Ngọc Trí Vĩ <vinnt@smartgift.vn>
 */

const { describe, it } = require("node:test");
const assert = require("node:assert/strict");
const path = require("node:path");
const fs = require("node:fs");
const os = require("node:os");

const ROOT = path.join(__dirname, "..", "..");
const HUB = path.join(ROOT, "server", "hub");
const SCAN = ["server", "bin", "scripts", "mcp", "statusline"];
const REQUIRE_HUB = /require\(\s*["'`][^"'`]*\bhub(?:\/[^"'`]*)?["'`]\s*\)/;

function jsFiles(dir) {
  const out = [];
  for (const e of fs.readdirSync(dir, { withFileTypes: true })) {
    const full = path.join(dir, e.name);
    if (e.isDirectory()) {
      if (["node_modules", "__tests__", "dist"].includes(e.name) || full === HUB) continue;
      out.push(...jsFiles(full));
    } else if (/\.(c|m)?js$/.test(e.name)) {
      out.push(full);
    }
  }
  return out;
}

describe("server/hub boundary", () => {
  it("nothing outside server/hub requires it, except index.js behind isServerMode()", () => {
    const offenders = [];
    for (const top of SCAN) {
      const dir = path.join(ROOT, top);
      if (!fs.existsSync(dir)) continue;
      for (const file of jsFiles(dir)) {
        const lines = fs.readFileSync(file, "utf8").split("\n");
        lines.forEach((line, i) => {
          if (!REQUIRE_HUB.test(line)) return;
          const rel = path.relative(ROOT, file);
          if (rel === path.join("server", "index.js") && /isServerMode\(\)/.test(line)) return;
          offenders.push(`${rel}:${i + 1}: ${line.trim()}`);
        });
      }
    }
    assert.deepEqual(offenders, []);
  });

  it("a local-mode app loads no module of server/hub", () => {
    const TMP = fs.mkdtempSync(path.join(os.tmpdir(), "hub-boundary-"));
    process.env.DASHBOARD_DB_PATH = path.join(TMP, "dashboard.db");
    process.env.CLAUDE_HOME = path.join(TMP, ".claude");
    process.env.DASHBOARD_DATA_DIR = path.join(TMP, "data");
    delete process.env.AGENTHUB_MODE;
    try {
      require("../index").createApp();
      const loaded = Object.keys(require.cache).filter((k) => k.startsWith(HUB + path.sep));
      assert.deepEqual(loaded, []);
    } finally {
      fs.rmSync(TMP, { recursive: true, force: true });
    }
  });
});