/**
 * @file remote-hub.test.js
 * @description The hub half of the remote-clients architecture (server/hub/),
 * in server mode: device enrollment by password (token shown once, stored as
 * a hash, 90 days, revocable), session registration (UUID, one device per
 * session, no hijack of a known session), the gateway (device token → pool
 * account's OAuth token, never the reverse; only registered sessions, `warn`
 * records an unmonitored one, `block` refuses; usage counted from SSE and
 * JSON answers; one account per session), the hourly upload (offset protocol,
 * fixed file shapes only, the SAME importer so tokens land, owner_id/source
 * stamped, scope: a developer sees only their own), retention purge, the
 * signed-in views (devices, revoke with the password again + audit, "who
 * opened my sessions").
 * @author Nguyễn Ngọc Trí Vĩ <vinnt@smartgift.vn>
 */

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

const TMP = fs.mkdtempSync(path.join(os.tmpdir(), "remote-hub-"));
process.env.DASHBOARD_DB_PATH = path.join(TMP, "dashboard.db");
process.env.CLAUDE_HOME = path.join(TMP, ".claude");
process.env.CODEX_HOME = path.join(TMP, ".codex");
process.env.DASHBOARD_DATA_DIR = path.join(TMP, "data");
process.env.DASHBOARD_LIVENESS_PROBE = "0";
process.env.AGENTHUB_REMOTE_REGISTER_GRACE_MS = "300";
process.env.AGENTHUB_REMOTE_UNMONITORED_ALERT_MS = "250";
process.env.AGENTHUB_REMOTE_FLUSH_MS = "250";

require("../lib/cc-usage").fetchUsage = async () => ({});
require("../lib/cc-usage").fetchOwner = async () => null;

let createApp;
let startServer;
let db;
let auth;
let server;
let BASE;
let upstream;
let seen = [];
const POOL_TOKEN = `sk-ant-oat01-${"p".repeat(40)}`;
const users = {};

const sid = () => crypto.randomUUID();

async function call(method, p, { token, cookie, body, headers = {} } = {}) {
  const res = await fetch(BASE + p, {
    method,
    headers: {
      "content-type": "application/json",
      ...(token ? { authorization: `Bearer ${token}` } : {}),
      ...(cookie ? { cookie } : {}),
      ...headers,
    },
    body: body !== undefined ? JSON.stringify(body) : undefined,
  });
  const text = await res.text();
  let json = null;
  try {
    json = JSON.parse(text);
  } catch {
    /* stream */
  }
  return { status: res.status, body: json, text, headers: res.headers };
}

async function login(username, password) {
  const res = await fetch(BASE + "/api/auth/login", {
    method: "POST",
    headers: { "content-type": "application/json" },
    body: JSON.stringify({ username, password }),
  });
  return res.headers.get("set-cookie").split(";")[0];
}

async function enroll(username, password, deviceName = "laptop") {
  return call("POST", "/api/remote/device/login", { body: { username, password, deviceName } });
}

function transcript(sessionId, cwd, { input = 10, output = 5, text = "hello" } = {}) {
  return (
    [
      {
        type: "user",
        sessionId,
        timestamp: "2026-11-04T01:00:00.000Z",
        cwd,
        message: { content: "do the thing" },
      },
      {
        type: "assistant",
        sessionId,
        timestamp: "2026-11-04T01:00:01.000Z",
        cwd,
        message: {
          id: `msg_${input}_${output}`,
          model: "claude-sonnet-4-5-20250929",
          content: [{ type: "text", text }],
          usage: {
            input_tokens: input,
            output_tokens: output,
            cache_read_input_tokens: 0,
            cache_creation_input_tokens: 0,
          },
        },
      },
    ]
      .map((l) => JSON.stringify(l))
      .join("\n") + "\n"
  );
}

before(async () => {
  upstream = http.createServer((req, res) => {
    let raw = "";
    req.on("data", (c) => (raw += c));
    req.on("end", () => {
      seen.push({ url: req.url, headers: req.headers, body: raw });
      const asked = JSON.parse(raw || "{}");
      if (asked.gzip) {
        // As api.anthropic.com answers a client that accepts it: compressed.
        const zlib = require("node:zlib");
        const sse =
          'event: message_start\ndata: {"type":"message_start","message":{"usage":{"input_tokens":11,"cache_read_input_tokens":0,"cache_creation_input_tokens":0,"output_tokens":1}}}\n\n' +
          'event: message_delta\ndata: {"type":"message_delta","usage":{"output_tokens":22}}\n\n';
        res.writeHead(200, { "content-type": "text/event-stream", "content-encoding": "gzip" });
        res.end(zlib.gzipSync(sse));
        return;
      }
      if (asked.stream) {
        res.writeHead(200, { "content-type": "text/event-stream" });
        res.write(
          'event: message_start\ndata: {"type":"message_start","message":{"usage":{"input_tokens":100,"cache_read_input_tokens":40,"cache_creation_input_tokens":7,"output_tokens":1}}}\n\n'
        );
        setTimeout(
          () =>
            res.end(
              'event: message_delta\ndata: {"type":"message_delta","usage":{"output_tokens":25}}\n\n'
            ),
          20
        );
        return;
      }
      res.writeHead(200, { "content-type": "application/json" });
      res.end(JSON.stringify({ ok: true, usage: { input_tokens: 3, output_tokens: 4 } }));
    });
  });
  await new Promise((r) => upstream.listen(0, "127.0.0.1", r));
  process.env.AGENTHUB_REMOTE_UPSTREAM = `http://127.0.0.1:${upstream.address().port}`;

  process.env.AGENTHUB_MODE = "server";
  ({ createApp, startServer } = require("../index"));
  ({ db } = require("../db"));
  auth = require("../lib/auth");
  server = await startServer(createApp(), 0);
  BASE = `http://127.0.0.1:${server.address().port}`;
  users.boss = await auth.createUser("boss", "admin-pass-1", "admin");
  users.mia = await auth.createUser("mia", "member-pass-1", "developer");
  users.tom = await auth.createUser("tom", "member-pass-2", "developer");
  require("../lib/claude-pool").addAccount("team", POOL_TOKEN);
});

after(() => {
  delete process.env.AGENTHUB_MODE;
  delete process.env.AGENTHUB_REMOTE_UPSTREAM;
  delete process.env.AGENTHUB_REMOTE_GATE;
  server?.close();
  upstream?.close();
  fs.rmSync(TMP, { recursive: true, force: true });
});

describe("device enrollment", () => {
  it("gives a token once for the right password, stores only its hash, 90 days", async () => {
    const r = await enroll("mia", "member-pass-1", "mia-laptop");
    assert.equal(r.status, 200);
    assert.match(r.body.token, /^ahdev_[A-Za-z0-9_-]{43}$/);
    assert.equal(r.body.user.username, "mia");
    assert.equal(r.body.device.name, "mia-laptop");
    const days = (Date.parse(r.body.device.expiresAt) - Date.now()) / 864e5;
    assert.ok(days > 89 && days <= 90, `expires in ${days} days`);
    const row = db.prepare("SELECT * FROM devices WHERE id = ?").get(r.body.device.id);
    assert.notEqual(row.token_hash, r.body.token);
    assert.ok(!JSON.stringify(row).includes(r.body.token));
    const me = await call("GET", "/api/remote/device/me", { token: r.body.token });
    assert.equal(me.status, 200);
    assert.equal(me.body.user.username, "mia");
    assert.ok(!JSON.stringify(me.body).includes("token_hash"));
  });

  it("refuses a wrong password and a disabled user", async () => {
    assert.equal((await enroll("mia", "wrong-pass")).status, 401);
    await auth.createUser("gone", "gone-pass-1", "developer");
    auth.setDisabled("gone", true);
    assert.equal((await enroll("gone", "gone-pass-1")).status, 401);
  });

  it("a revoked, expired or disabled-user token opens nothing", async () => {
    const r = await enroll("tom", "member-pass-2");
    const t = r.body.token;
    assert.equal((await call("GET", "/api/remote/device/me", { token: t })).status, 200);
    db.prepare("UPDATE devices SET expires_at = '2000-01-01T00:00:00Z' WHERE id = ?").run(
      r.body.device.id
    );
    assert.equal((await call("GET", "/api/remote/device/me", { token: t })).status, 401);
    const r2 = await enroll("tom", "member-pass-2");
    assert.equal(
      (await call("POST", "/api/remote/device/logout", { token: r2.body.token, body: {} })).status,
      200
    );
    assert.equal(
      (await call("GET", "/api/remote/device/me", { token: r2.body.token })).status,
      401
    );
    assert.equal(
      (await call("GET", "/api/remote/device/me", { token: "ahdev_" + "x".repeat(43) })).status,
      401
    );
  });

  it("a device token is no login: cookie routes refuse it", async () => {
    const r = await enroll("mia", "member-pass-1");
    const res = await call("GET", "/api/sessions", { token: r.body.token });
    assert.equal(res.status, 401);
  });
});

describe("session registration", () => {
  let mia;
  let tom;
  before(async () => {
    mia = (await enroll("mia", "member-pass-1")).body.token;
    tom = (await enroll("tom", "member-pass-2")).body.token;
  });

  it("takes a UUID + absolute folder, refuses anything else", async () => {
    const id = sid();
    const ok = await call("POST", "/api/remote/device/sessions", {
      token: mia,
      body: { sessionId: id, cwd: "/home/mia/proj" },
    });
    assert.equal(ok.status, 200);
    assert.equal(ok.body.sessionId, id);
    for (const body of [
      { sessionId: "not-a-uuid", cwd: "/x" },
      { sessionId: sid(), cwd: "relative/path" },
      { sessionId: sid(), cwd: "/x", tool: "codex" },
    ]) {
      const r = await call("POST", "/api/remote/device/sessions", { token: mia, body });
      assert.equal(r.status, 400, JSON.stringify(body));
    }
  });

  it("one session belongs to one device; a known local session cannot be claimed", async () => {
    const id = sid();
    await call("POST", "/api/remote/device/sessions", {
      token: mia,
      body: { sessionId: id, cwd: "/a" },
    });
    const again = await call("POST", "/api/remote/device/sessions", {
      token: mia,
      body: { sessionId: id, cwd: "/a" },
    });
    assert.equal(again.status, 200, "re-registering (a resume) is fine");
    const theft = await call("POST", "/api/remote/device/sessions", {
      token: tom,
      body: { sessionId: id, cwd: "/a" },
    });
    assert.equal(theft.status, 409);
    // The same user enrolled again (a new device) resumes it: it moves along.
    const mia2 = (await enroll("mia", "member-pass-1", "mia-new")).body.token;
    const moved = await call("POST", "/api/remote/device/sessions", {
      token: mia2,
      body: { sessionId: id, cwd: "/a" },
    });
    assert.equal(moved.status, 200);
    const back = await call("POST", "/api/remote/device/sessions", {
      token: mia,
      body: { sessionId: id, cwd: "/a" },
    });
    assert.equal(back.status, 200, "and back");
    const local = sid();
    db.prepare(
      "INSERT INTO sessions (id, name, status, cwd) VALUES (?, 'local', 'active', '/w')"
    ).run(local);
    const claim = await call("POST", "/api/remote/device/sessions", {
      token: tom,
      body: { sessionId: local, cwd: "/w" },
    });
    assert.equal(claim.status, 409);
  });
});

describe("enrollment and registration edges", () => {
  it("a temporary password (must change) cannot enroll a machine", async () => {
    db.prepare("UPDATE users SET must_change_password = 1 WHERE username = 'mia'").run();
    try {
      const r = await enroll("mia", "member-pass-1", "temp-box");
      assert.equal(r.status, 403);
      assert.equal(r.body.error.code, "EPWCHANGE");
      assert.equal(r.body.token, undefined);
    } finally {
      db.prepare("UPDATE users SET must_change_password = 0 WHERE username = 'mia'").run();
    }
  });

  it("a session keeps the folder it was first registered with", async () => {
    const t = (await enroll("mia", "member-pass-1", "cwd-box")).body.token;
    const id = sid();
    await call("POST", "/api/remote/device/sessions", {
      token: t,
      body: { sessionId: id, cwd: "/a" },
    });
    await call("POST", "/api/remote/device/sessions", {
      token: t,
      body: { sessionId: id, cwd: "/b" },
    });
    assert.equal(
      db.prepare("SELECT cwd FROM remote_sessions WHERE session_id = ?").get(id).cwd,
      "/a"
    );
  });

  it("a purged session cannot be registered again", async () => {
    const t = (await enroll("mia", "member-pass-1", "purge-box")).body.token;
    const id = sid();
    await call("POST", "/api/remote/device/sessions", {
      token: t,
      body: { sessionId: id, cwd: "/a" },
    });
    db.prepare("UPDATE remote_sessions SET purged_at = '2026-01-01' WHERE session_id = ?").run(id);
    const r = await call("POST", "/api/remote/device/sessions", {
      token: t,
      body: { sessionId: id, cwd: "/a" },
    });
    assert.equal(r.status, 410);
    assert.equal(r.body.error.code, "EPURGED");
  });
});

describe("the gateway", () => {
  let token;
  let deviceId;
  before(async () => {
    const r = await enroll("mia", "member-pass-1", "gw-box");
    token = r.body.token;
    deviceId = r.body.device.id;
  });

  const register = (id) =>
    call("POST", "/api/remote/device/sessions", {
      token,
      body: { sessionId: id, cwd: "/home/mia/p" },
    });

  it("relays a registered session with the pool's OAuth token, never the device token", async () => {
    const id = sid();
    await register(id);
    seen = [];
    const r = await call("POST", "/api/remote/gw/v1/messages?beta=true", {
      token,
      headers: {
        "x-claude-code-session-id": id,
        "anthropic-beta": "claude-code-20250219",
        "anthropic-version": "2023-06-01",
      },
      body: { model: "m", messages: [] },
    });
    assert.equal(r.status, 200);
    assert.equal(seen.length, 1);
    const got = seen[0];
    assert.equal(got.url, "/v1/messages?beta=true");
    assert.equal(got.headers.authorization, `Bearer ${POOL_TOKEN}`);
    assert.equal(got.headers["x-api-key"], undefined);
    assert.equal(got.headers["anthropic-beta"], "claude-code-20250219,oauth-2025-04-20");
    assert.ok(!JSON.stringify(got.headers).includes("ahdev_"));
    assert.ok(!r.text.includes(POOL_TOKEN), "the pool token never reaches the client");
    const row = db.prepare("SELECT * FROM remote_sessions WHERE session_id = ?").get(id);
    assert.equal(row.account, "team");
    assert.equal(row.requests, 1);
    assert.equal(row.gw_input_tokens, 3);
    assert.equal(row.gw_output_tokens, 4);
  });

  it("counts usage from a streamed answer and passes the stream through", async () => {
    const id = sid();
    await register(id);
    const r = await call("POST", "/api/remote/gw/v1/messages", {
      token,
      headers: { "x-claude-code-session-id": id },
      body: { stream: true },
    });
    assert.equal(r.status, 200);
    assert.match(r.text, /message_start[\s\S]*message_delta/);
    const row = db.prepare("SELECT * FROM remote_sessions WHERE session_id = ?").get(id);
    assert.equal(row.gw_input_tokens, 100);
    assert.equal(row.gw_cache_read_tokens, 40);
    assert.equal(row.gw_cache_write_tokens, 7);
    assert.equal(row.gw_output_tokens, 25);
  });

  it("counts usage from a compressed answer and relays the bytes as they came", async () => {
    const id = sid();
    await register(id);
    const res = await fetch(`${BASE}/api/remote/gw/v1/messages`, {
      method: "POST",
      headers: {
        "content-type": "application/json",
        authorization: `Bearer ${token}`,
        "x-claude-code-session-id": id,
      },
      body: JSON.stringify({ gzip: true }),
    });
    assert.equal(res.status, 200);
    assert.equal(res.headers.get("content-encoding"), "gzip");
    assert.match(await res.text(), /message_delta/); // fetch inflates it for us
    const row = db.prepare("SELECT * FROM remote_sessions WHERE session_id = ?").get(id);
    assert.equal(row.gw_input_tokens, 11);
    assert.equal(row.gw_output_tokens, 22);
  });

  it("waits out a registration that is still on its way", async () => {
    const id = sid();
    const req = call("POST", "/api/remote/gw/v1/messages", {
      token,
      headers: { "x-claude-code-session-id": id },
      body: {},
    });
    setTimeout(() => register(id), 80);
    const r = await req;
    assert.equal(r.status, 200);
    assert.equal(
      db.prepare("SELECT unmonitored FROM remote_sessions WHERE session_id = ?").get(id)
        .unmonitored,
      0
    );
  });

  it("warn: an unregistered session is relayed and recorded as unmonitored", async () => {
    delete process.env.AGENTHUB_REMOTE_GATE;
    const id = sid();
    const r = await call("POST", "/api/remote/gw/v1/messages", {
      token,
      headers: { "x-claude-code-session-id": id },
      body: {},
    });
    assert.equal(r.status, 200);
    const row = db.prepare("SELECT * FROM remote_sessions WHERE session_id = ?").get(id);
    assert.equal(row.unmonitored, 1);
    assert.equal(row.device_id, deviceId);
  });

  it("warn: an unmonitored session raises the remote_unmonitored alert; a late registration clears it and alerts nobody", async () => {
    delete process.env.AGENTHUB_REMOTE_GATE;
    const alerts = require("../lib/alerts");
    assert.deepEqual(alerts.validateRuleConfig("remote_unmonitored", {}), {
      ok: true,
      config: {},
    });
    db.prepare(
      "INSERT INTO alert_rules (id, name, rule_type, config) VALUES ('ru1', 'outside', 'remote_unmonitored', '{}')"
    ).run();
    alerts.invalidateRuleCache();
    try {
      const gw = (id) =>
        call("POST", "/api/remote/gw/v1/messages", {
          token,
          headers: { "x-claude-code-session-id": id },
          body: {},
        });
      const outside = sid();
      const late = sid();
      assert.equal((await gw(outside)).status, 200);
      assert.equal((await gw(late)).status, 200);
      // `late` was only late: its registration arrives before the alert is due.
      assert.equal((await register(late)).status, 200);
      assert.equal(
        db.prepare("SELECT unmonitored FROM remote_sessions WHERE session_id = ?").get(late)
          .unmonitored,
        0
      );
      await new Promise((r) => setTimeout(r, 450));
      const fired = db
        .prepare("SELECT session_id, message FROM alert_events WHERE rule_id = 'ru1'")
        .all();
      const hit = fired.find((a) => a.session_id === outside);
      assert.ok(hit, "the session nobody registered alerts");
      assert.match(hit.message, /mia on gw-box/);
      assert.ok(!fired.some((a) => a.session_id === late), "a late registration alerts nobody");
    } finally {
      db.prepare("DELETE FROM alert_rules WHERE id = 'ru1'").run();
      alerts.invalidateRuleCache();
    }
  });

  it("warn: a message with no session id is still refused, and a known session is never claimed", async () => {
    delete process.env.AGENTHUB_REMOTE_GATE;
    seen = [];
    const bare = await call("POST", "/api/remote/gw/v1/messages", { token, body: {} });
    assert.equal(bare.status, 403);
    assert.equal(bare.body.error.code, "EUNREGISTERED");
    const hubOwn = sid();
    db.prepare(
      "INSERT INTO sessions (id, name, status, cwd) VALUES (?, 'hub pane', 'active', '/w')"
    ).run(hubOwn);
    const claim = await call("POST", "/api/remote/gw/v1/messages", {
      token,
      headers: { "x-claude-code-session-id": hubOwn },
      body: {},
    });
    assert.equal(claim.status, 409);
    assert.equal(
      db.prepare("SELECT 1 FROM remote_sessions WHERE session_id = ?").get(hubOwn),
      undefined
    );
    assert.equal(seen.length, 0, "nothing reached upstream");
  });

  it("a user over their spend quota is refused (EQUOTA)", async () => {
    const quota = require("../lib/user-quota");
    const real = quota.assertSpawnAllowed;
    const gw = require("../hub/remote-gateway");
    quota.assertSpawnAllowed = () => {
      throw Object.assign(new Error("over the daily limit"), { code: "EQUOTA" });
    };
    gw.__resetQuota();
    try {
      const id = sid();
      await register(id);
      seen = [];
      const r = await call("POST", "/api/remote/gw/v1/messages", {
        token,
        headers: { "x-claude-code-session-id": id },
        body: {},
      });
      assert.equal(r.status, 429);
      assert.equal(r.body.error.code, "EQUOTA");
      assert.equal(seen.length, 0);
    } finally {
      quota.assertSpawnAllowed = real;
      gw.__resetQuota();
    }
  });

  it("a purged session is not relayed", async () => {
    const id = sid();
    await register(id);
    db.prepare("UPDATE remote_sessions SET purged_at = '2026-01-01' WHERE session_id = ?").run(id);
    seen = [];
    const r = await call("POST", "/api/remote/gw/v1/messages", {
      token,
      headers: { "x-claude-code-session-id": id },
      body: {},
    });
    assert.equal(r.status, 410);
    assert.equal(seen.length, 0);
  });

  it("block: an unregistered session or a message with no session id is refused", async () => {
    process.env.AGENTHUB_REMOTE_GATE = "block";
    try {
      seen = [];
      const r = await call("POST", "/api/remote/gw/v1/messages", {
        token,
        headers: { "x-claude-code-session-id": sid() },
        body: {},
      });
      assert.equal(r.status, 403);
      assert.equal(r.body.error.code, "EUNREGISTERED");
      const bare = await call("POST", "/api/remote/gw/v1/messages", { token, body: {} });
      assert.equal(bare.status, 403);
      assert.equal(seen.length, 0, "nothing reached upstream");
      const id = sid();
      await register(id);
      const ok = await call("POST", "/api/remote/gw/v1/messages", {
        token,
        headers: { "x-claude-code-session-id": id },
        body: {},
      });
      assert.equal(ok.status, 200);
    } finally {
      delete process.env.AGENTHUB_REMOTE_GATE;
    }
  });

  it("refuses a bad token, another device's session and a path outside /v1/", async () => {
    assert.equal(
      (await call("POST", "/api/remote/gw/v1/messages", { token: "nope", body: {} })).status,
      401
    );
    const id = sid();
    await register(id);
    const other = (await enroll("tom", "member-pass-2")).body.token;
    const r = await call("POST", "/api/remote/gw/v1/messages", {
      token: other,
      headers: { "x-claude-code-session-id": id },
      body: {},
    });
    assert.equal(r.status, 409);
    seen = [];
    assert.equal((await call("GET", "/api/remote/gw/api/oauth/usage", { token })).status, 400);
    // fetch folds the `..` away: the request never reaches the gateway at all.
    assert.notEqual((await call("GET", "/api/remote/gw/v1/../../etc", { token })).status, 200);
    assert.equal(seen.length, 0, "nothing reached upstream");
  });

  it("keeps a session on the account it started on", async () => {
    const id = sid();
    await register(id);
    db.prepare("UPDATE remote_sessions SET account = 'team' WHERE session_id = ?").run(id);
    require("../lib/claude-pool").addAccount("aaa-first", `sk-ant-oat01-${"q".repeat(40)}`);
    try {
      seen = [];
      await call("POST", "/api/remote/gw/v1/messages", {
        token,
        headers: { "x-claude-code-session-id": id },
        body: {},
      });
      assert.equal(seen[0].headers.authorization, `Bearer ${POOL_TOKEN}`);
    } finally {
      require("../lib/claude-pool").removeAccount("aaa-first");
    }
  });
});

describe("the hourly upload", () => {
  let mia;
  let tom;
  let miaCookie;
  let tomCookie;
  before(async () => {
    mia = (await enroll("mia", "member-pass-1", "mia-pc")).body.token;
    tom = (await enroll("tom", "member-pass-2", "tom-pc")).body.token;
    miaCookie = await login("mia", "member-pass-1");
    tomCookie = await login("tom", "member-pass-2");
  });

  it("appends at the hub's offset, imports with the local importer, stamps owner and source", async () => {
    const id = sid();
    const cwd = "/home/mia/shop";
    await call("POST", "/api/remote/device/sessions", { token: mia, body: { sessionId: id, cwd } });
    const part1 = transcript(id, cwd);
    const r1 = await call("POST", "/api/remote/device/upload", {
      token: mia,
      body: {
        sessionId: id,
        files: [{ path: `${id}.jsonl`, from: 0, to: Buffer.byteLength(part1), data: part1 }],
      },
    });
    assert.equal(r1.status, 200, JSON.stringify(r1.body));
    const s = db.prepare("SELECT * FROM sessions WHERE id = ?").get(id);
    assert.ok(s, "the importer made the session row");
    assert.equal(s.owner_id, users.mia.id);
    assert.match(s.source, /^device:\d+$/);
    const tok = db
      .prepare(
        "SELECT SUM(input_tokens) AS i, SUM(output_tokens) AS o FROM token_usage WHERE session_id = ?"
      )
      .get(id);
    assert.equal(tok.i, 10);
    assert.equal(tok.o, 5);

    // A wrong offset is told where the hub stands; nothing is written.
    const bad = await call("POST", "/api/remote/device/upload", {
      token: mia,
      body: { sessionId: id, files: [{ path: `${id}.jsonl`, from: 0, to: 10, data: "x\n" }] },
    });
    assert.equal(bad.status, 409);
    assert.equal(bad.body.error.expected.consumed, Buffer.byteLength(part1));

    // Scope: mia sees it, tom does not, the admin does.
    const own = await call("GET", "/api/sessions?limit=100", { cookie: miaCookie });
    assert.ok(JSON.stringify(own.body).includes(id));
    const other = await call("GET", "/api/sessions?limit=100", { cookie: tomCookie });
    assert.ok(!JSON.stringify(other.body).includes(id));
    assert.equal((await call("GET", `/api/sessions/${id}`, { cookie: tomCookie })).status, 404);
  });

  it("chunks marked `more` are imported once: by the round's closing request, or after FLUSH_MS", async () => {
    const tokens = (id) =>
      db.prepare("SELECT SUM(output_tokens) AS o FROM token_usage WHERE session_id = ?").get(id).o;
    const cwd = "/home/mia/chunks";
    const up = (id, body) =>
      call("POST", "/api/remote/device/upload", { token: mia, body: { sessionId: id, ...body } });

    const id = sid();
    await call("POST", "/api/remote/device/sessions", { token: mia, body: { sessionId: id, cwd } });
    const [l1, l2] = transcript(id, cwd).split(/(?<=\n)/);
    const a = await up(id, {
      files: [{ path: `${id}.jsonl`, from: 0, to: Buffer.byteLength(l1), data: l1 }],
      more: true,
    });
    assert.equal(a.status, 200, JSON.stringify(a.body));
    const from = Buffer.byteLength(l1);
    await up(id, {
      files: [{ path: `${id}.jsonl`, from, to: from + Buffer.byteLength(l2), data: l2 }],
      more: true,
    });
    assert.equal(tokens(id), null, "nothing imported while the round goes on");
    const close = await up(id, { files: [] });
    assert.equal(close.status, 200);
    assert.equal(close.body.imported, true);
    assert.equal(tokens(id), 5);

    // A round that stopped half-way is imported FLUSH_MS later.
    const id2 = sid();
    await call("POST", "/api/remote/device/sessions", { token: mia, body: { sessionId: id2, cwd } });
    const t2 = transcript(id2, cwd, { output: 7 });
    await up(id2, {
      files: [{ path: `${id2}.jsonl`, from: 0, to: Buffer.byteLength(t2), data: t2 }],
      more: true,
    });
    assert.equal(tokens(id2), null);
    await new Promise((r) => setTimeout(r, 500));
    assert.equal(tokens(id2), 7);
    assert.deepEqual(require("../hub/remote-ingest").__pending(), []);
  });

  it("a session moved to the user's new device keeps its copy and offsets", async () => {
    const id = sid();
    await call("POST", "/api/remote/device/sessions", {
      token: mia,
      body: { sessionId: id, cwd: "/m" },
    });
    const t1 = transcript(id, "/m", { input: 1, output: 2 });
    const first = await call("POST", "/api/remote/device/upload", {
      token: mia,
      body: {
        sessionId: id,
        files: [{ path: `${id}.jsonl`, from: 0, to: Buffer.byteLength(t1), data: t1 }],
      },
    });
    assert.equal(first.status, 200, JSON.stringify(first.body));
    const newer = (await enroll("mia", "member-pass-1", "mia-reinstalled")).body;
    await call("POST", "/api/remote/device/sessions", {
      token: newer.token,
      body: { sessionId: id, cwd: "/m" },
    });
    const t2 = transcript(id, "/m", { input: 30, output: 40 }).replace(
      /2026-11-04T01:00/g,
      "2026-11-04T02:00"
    );
    const r = await call("POST", "/api/remote/device/upload", {
      token: newer.token,
      body: {
        sessionId: id,
        files: [
          {
            path: `${id}.jsonl`,
            from: Buffer.byteLength(t1),
            to: Buffer.byteLength(t1 + t2),
            data: t2,
          },
        ],
      },
    });
    assert.equal(r.status, 200, JSON.stringify(r.body));
    const old = await call("POST", "/api/remote/device/upload", {
      token: mia,
      body: { sessionId: id, files: [] },
    });
    assert.equal(old.status, 404, "the old device no longer holds it");
    const s = db.prepare("SELECT source, transcript_path FROM sessions WHERE id = ?").get(id);
    assert.equal(s.source, `device:${newer.device.id}`);
    assert.ok(s.transcript_path.includes(`/d${newer.device.id}/`), s.transcript_path);
    assert.equal(fs.readFileSync(s.transcript_path, "utf8"), t1 + t2, "one file, both parts");
    const tok = db
      .prepare(
        "SELECT SUM(input_tokens) AS i, SUM(output_tokens) AS o FROM token_usage WHERE session_id = ?"
      )
      .get(id);
    assert.equal(tok.i, 31);
    assert.equal(tok.o, 42);
  });

  it("takes only the session's own file shapes, from its own device", async () => {
    const id = sid();
    await call("POST", "/api/remote/device/sessions", {
      token: mia,
      body: { sessionId: id, cwd: "/m" },
    });
    for (const p of [
      "../../etc/passwd",
      `${id}/../x.jsonl`,
      `other.jsonl`,
      `${id}/subagents/agent-a/../../x.jsonl`,
      `${id}/notes.txt`,
    ]) {
      const r = await call("POST", "/api/remote/device/upload", {
        token: mia,
        body: { sessionId: id, files: [{ path: p, from: 0, to: 2, data: "{}\n" }] },
      });
      assert.equal(r.status, 400, p);
    }
    const sub = await call("POST", "/api/remote/device/upload", {
      token: mia,
      body: {
        sessionId: id,
        files: [{ path: `${id}/subagents/agent-abc.jsonl`, from: 0, to: 3, data: "{}\n" }],
      },
    });
    assert.equal(sub.status, 200);
    const foreign = await call("POST", "/api/remote/device/upload", {
      token: tom,
      body: { sessionId: id, files: [] },
    });
    assert.equal(foreign.status, 404);
    const partial = await call("POST", "/api/remote/device/upload", {
      token: mia,
      body: { sessionId: id, files: [{ path: `${id}.jsonl`, from: 0, to: 3, data: "abc" }] },
    });
    assert.equal(partial.status, 400, "half a line is refused");
  });

  it("purges conversations past retention and keeps the tokens", async () => {
    const id = sid();
    await call("POST", "/api/remote/device/sessions", {
      token: mia,
      body: { sessionId: id, cwd: "/m" },
    });
    const t = transcript(id, "/m", { input: 7, output: 9 });
    await call("POST", "/api/remote/device/upload", {
      token: mia,
      body: {
        sessionId: id,
        files: [{ path: `${id}.jsonl`, from: 0, to: Buffer.byteLength(t), data: t }],
        ended: true,
      },
    });
    assert.ok(db.prepare("SELECT COUNT(*) AS n FROM events WHERE session_id = ?").get(id).n > 0);
    const ingest = require("../hub/remote-ingest");
    const n = ingest.purgeOld({ days: 30, now: Date.now() + 31 * 864e5 });
    assert.ok(n >= 1);
    assert.equal(db.prepare("SELECT COUNT(*) AS n FROM events WHERE session_id = ?").get(id).n, 0);
    assert.equal(
      db.prepare("SELECT SUM(output_tokens) AS o FROM token_usage WHERE session_id = ?").get(id).o,
      9
    );
    const row = db.prepare("SELECT * FROM remote_sessions WHERE session_id = ?").get(id);
    assert.ok(row.purged_at);
    assert.ok(row.ended_at);
    const r = await call("POST", "/api/remote/device/upload", {
      token: mia,
      body: { sessionId: id, files: [] },
    });
    assert.equal(r.status, 410);
  });
});

describe("signed-in views", () => {
  it("a developer lists only their own devices and revokes one with their password", async () => {
    const d = (await enroll("mia", "member-pass-1", "to-revoke")).body;
    const miaCookie = await login("mia", "member-pass-1");
    const tomCookie = await login("tom", "member-pass-2");
    const mine = await call("GET", "/api/remote/devices", { cookie: miaCookie });
    assert.ok(mine.body.devices.every((x) => x.userId === users.mia.id));
    const peek = await call("GET", `/api/remote/devices?user=${users.mia.id}`, {
      cookie: tomCookie,
    });
    assert.ok(
      peek.body.devices.every((x) => x.userId === users.tom.id),
      "?user= is ignored for a developer"
    );
    const steal = await call("POST", `/api/remote/devices/${d.device.id}/revoke`, {
      cookie: tomCookie,
      body: { password: "member-pass-2" },
    });
    assert.equal(steal.status, 404);
    const wrong = await call("POST", `/api/remote/devices/${d.device.id}/revoke`, {
      cookie: miaCookie,
      body: { password: "nope" },
    });
    assert.equal(wrong.status, 403);
    const ok = await call("POST", `/api/remote/devices/${d.device.id}/revoke`, {
      cookie: miaCookie,
      body: { password: "member-pass-1" },
    });
    assert.equal(ok.status, 200);
    assert.ok(ok.body.device.revokedAt);
    assert.equal((await call("GET", "/api/remote/device/me", { token: d.token })).status, 401);
  });

  it("an admin sees a user's devices and remote sessions and revokes with audit", async () => {
    const d = (await enroll("tom", "member-pass-2", "tom-revoked-by-admin")).body;
    const boss = await login("boss", "admin-pass-1");
    const list = await call("GET", `/api/remote/devices?user=${users.tom.id}`, { cookie: boss });
    assert.ok(list.body.devices.some((x) => x.id === d.device.id));
    assert.ok(list.body.devices.every((x) => !("token_hash" in x)));
    const r = await call("POST", `/api/remote/devices/${d.device.id}/revoke`, {
      cookie: boss,
      body: { password: "admin-pass-1" },
    });
    assert.equal(r.status, 200);
    const a = db
      .prepare(
        "SELECT * FROM audit_log WHERE user_id = ? AND owner_id = ? AND path LIKE 'remote device revoked%'"
      )
      .get(users.boss.id, users.tom.id);
    assert.ok(a);
    const sessions = await call("GET", `/api/remote/sessions?user=${users.mia.id}`, {
      cookie: boss,
    });
    assert.equal(sessions.status, 200);
    assert.ok(sessions.body.sessions.length > 0);
    assert.ok(sessions.body.sessions.every((s) => s.userId === users.mia.id));
  });

  it("a user sees who opened their sessions", async () => {
    const mia = (await enroll("mia", "member-pass-1")).body.token;
    const id = sid();
    await call("POST", "/api/remote/device/sessions", {
      token: mia,
      body: { sessionId: id, cwd: "/m" },
    });
    const t = transcript(id, "/m");
    await call("POST", "/api/remote/device/upload", {
      token: mia,
      body: {
        sessionId: id,
        files: [{ path: `${id}.jsonl`, from: 0, to: Buffer.byteLength(t), data: t }],
      },
    });
    const boss = await login("boss", "admin-pass-1");
    assert.equal((await call("GET", `/api/sessions/${id}`, { cookie: boss })).status, 200);
    const miaCookie = await login("mia", "member-pass-1");
    const log = await call("GET", "/api/remote/audit", { cookie: miaCookie });
    assert.equal(log.status, 200);
    assert.ok(log.body.entries.some((e) => e.sessionId === id && e.reader === "boss"));
  });

  it("the users page counts a remote session's spend for its owner", async () => {
    const boss = await login("boss", "admin-pass-1");
    const r = await call("GET", `/api/users/${users.mia.id}/details`, { cookie: boss });
    assert.equal(r.status, 200);
    assert.ok(r.body.sessions.total >= 2, JSON.stringify(r.body.sessions));
  });
});