/**
 * @file pool-groups.test.js
 * @description Account pool groups (server/lib/pool-groups.js and the
 * `/api/accounts/groups` routes), fake accounts only: with no group every
 * account is shared as before; a group's member gets only the group's
 * accounts of each tool (none → no pool account), a user in no group only
 * the accounts no group lists, a pin wins over the group; one group per user;
 * a removed account or deleted group leaves no rows behind; and the routes
 * need an admin's own password again, are audited and refuse in local mode.
 * @author Nguyễn Ngọc Trí Vĩ <vinnt@smartgift.vn>
 */

const { describe, it, before, after, beforeEach } = 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 TMP = fs.mkdtempSync(path.join(os.tmpdir(), "pool-groups-test-"));
process.env.DASHBOARD_DB_PATH = path.join(TMP, "dashboard.db");
process.env.CLAUDE_HOME = path.join(TMP, ".claude");
process.env.DASHBOARD_LIVENESS_PROBE = "0";

const { createApp, startServer } = require("../index");
const { db } = require("../db");
const auth = require("../lib/auth");
const groups = require("../lib/pool-groups");
const cursorPool = require("../lib/cursor-pool");
const claudePool = require("../lib/claude-pool");
const pins = require("../lib/account-pins");

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

const BOSS_PASS = "admin-pass-1";
const KEY = (c) => `key_${c.repeat(40)}`;
const TOKEN = (c) => `sk-ant-oat01-${c.repeat(40)}`;
let server;
let BASE;
let MIA;
let LEO;
let ZOE;

async function call(method, p, { cookie, body } = {}) {
  const res = await fetch(BASE + p, {
    method,
    headers: { "Content-Type": "application/json", ...(cookie ? { cookie } : {}) },
    body: body ? JSON.stringify(body) : undefined,
  });
  return { status: res.status, body: await res.json().catch(() => null) };
}

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];
}

before(async () => {
  process.env.AGENTHUB_MODE = "server";
  server = await startServer(createApp(), 0);
  BASE = `http://127.0.0.1:${server.address().port}`;
  await auth.createUser("boss", BOSS_PASS, "admin");
  MIA = (await auth.createUser("mia", "member-pass-1", "developer")).id;
  LEO = (await auth.createUser("leo", "member-pass-2", "developer")).id;
  ZOE = (await auth.createUser("zoe", "member-pass-3", "developer")).id;
});

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

beforeEach(() => {
  db.prepare("DELETE FROM pool_groups").run();
  db.prepare("DELETE FROM account_pins").run();
  for (const dir of [cursorPool.poolDir(), claudePool.poolDir()]) {
    fs.rmSync(dir, { recursive: true, force: true });
  }
  for (const c of ["a", "b", "c"]) cursorPool.addAccount(c, { apiKey: KEY(c) });
});

describe("pool groups: who may take which account", () => {
  it("shares every account while no group exists", () => {
    assert.equal(cursorPool.pickAccount(MIA).name, "a");
    assert.ok(["a", "b", "c"].every(groups.allowed(MIA, "cursor")));
  });

  it("gives a member only the group's accounts, the rest only the shared ones", () => {
    const g = groups.createGroup("Team A");
    groups.setGroupUsers(g.id, [MIA]);
    groups.setGroupAccounts(g.id, "cursor", ["b"]);
    assert.equal(cursorPool.pickAccount(MIA).name, "b");
    assert.equal(cursorPool.pickAccount(LEO).name, "a", "b is no longer shared");
    // An account may serve several groups; a group with no account of a tool
    // leaves its members on their own sign-in.
    const h = groups.createGroup("Team B");
    groups.setGroupUsers(h.id, [ZOE]);
    assert.equal(cursorPool.pickAccount(ZOE), null);
    groups.setGroupAccounts(h.id, "cursor", ["b", "c"]);
    assert.ok(["b", "c"].includes(cursorPool.pickAccount(ZOE).name));
    assert.equal(cursorPool.pickAccount(LEO).name, "a");
    // Claude follows the same groups.
    claudePool.addAccount("shared", TOKEN("s"));
    claudePool.addAccount("team", TOKEN("t"));
    groups.setGroupAccounts(g.id, "claude", ["team"]);
    assert.equal(claudePool.pickAccount(null, MIA).name, "team");
    assert.equal(claudePool.pickAccount(null, LEO).name, "shared");
  });

  it("puts a user in one group only, and honours a pin outside it", () => {
    const g = groups.createGroup("A");
    const h = groups.createGroup("B");
    groups.setGroupUsers(g.id, [MIA, LEO]);
    groups.setGroupUsers(h.id, [MIA]);
    const list = groups.listGroups();
    assert.deepEqual(
      list.find((x) => x.name === "A").users.map((u) => u.username),
      ["leo"]
    );
    assert.deepEqual(
      list.find((x) => x.name === "B").users.map((u) => u.username),
      ["mia"]
    );
    groups.setGroupAccounts(h.id, "cursor", ["b"]);
    pins.setPin(MIA, "cursor", "c");
    assert.equal(cursorPool.pickAccount(MIA).name, "c");
  });

  it("drops a removed account from its groups, and a group's rows with it", () => {
    const g = groups.createGroup("A");
    groups.setGroupUsers(g.id, [MIA]);
    groups.setGroupAccounts(g.id, "cursor", ["b"]);
    cursorPool.removeAccount("b");
    assert.deepEqual(groups.listGroups()[0].accounts.cursor, []);
    groups.deleteGroup(g.id);
    assert.equal(db.prepare("SELECT COUNT(*) AS n FROM pool_group_users").get().n, 0);
    assert.throws(() => groups.setGroupAccounts(g.id, "cursor", ["a"]), { code: "ENOGROUP" });
    assert.throws(() => groups.createGroup(""), { code: "EBADNAME" });
  });
});

describe("pool groups: routes", () => {
  it("creates, edits and deletes a group with the admin's own password, audited", async () => {
    const boss = await login("boss", BOSS_PASS);
    const bad = await call("POST", "/api/accounts/groups", {
      cookie: boss,
      body: { name: "Team A", currentPassword: "nope" },
    });
    assert.equal(bad.body.error.code, "EREAUTH");
    const made = await call("POST", "/api/accounts/groups", {
      cookie: boss,
      body: { name: "Team A", currentPassword: BOSS_PASS },
    });
    assert.equal(made.status, 201);
    const id = made.body.group.id;
    const dup = await call("POST", "/api/accounts/groups", {
      cookie: boss,
      body: { name: "team a", currentPassword: BOSS_PASS },
    });
    assert.equal(dup.body.error.code, "EEXISTS");
    const edit = await call("PATCH", `/api/accounts/groups/${id}`, {
      cookie: boss,
      body: {
        name: "Team Alpha",
        userIds: [MIA],
        accounts: { cursor: ["a"] },
        currentPassword: BOSS_PASS,
      },
    });
    assert.equal(edit.status, 200);
    assert.equal(edit.body.group.name, "Team Alpha");
    assert.deepEqual(edit.body.group.accounts.cursor, ["a"]);
    const missing = await call("PATCH", `/api/accounts/groups/${id}`, {
      cookie: boss,
      body: { accounts: { cursor: ["nope"] }, currentPassword: BOSS_PASS },
    });
    assert.equal(missing.body.error.code, "ENOACCOUNT");
    const list = await call("GET", "/api/accounts", { cookie: boss });
    assert.equal(list.body.groups[0].users[0].username, "mia");
    const audit = db.prepare("SELECT path FROM audit_log ORDER BY id DESC LIMIT 1").get();
    assert.match(audit.path, /group Team Alpha cursor accounts/);
    const dev = await login("leo", "member-pass-2");
    const refused = await call("DELETE", `/api/accounts/groups/${id}`, {
      cookie: dev,
      body: { currentPassword: "member-pass-2" },
    });
    assert.equal(refused.status, 403);
    const del = await call("DELETE", `/api/accounts/groups/${id}`, {
      cookie: boss,
      body: { currentPassword: BOSS_PASS },
    });
    assert.equal(del.status, 200);
    const gone = await call("DELETE", `/api/accounts/groups/${id}`, {
      cookie: boss,
      body: { currentPassword: BOSS_PASS },
    });
    assert.equal(gone.status, 404);
  });
});