/**
 * @file Tests for deleting a user (`DELETE /api/users/:id`, auth.deleteUser):
 * the admin's own password again, never yourself (ESELF) or the last admin
 * (ELASTADMIN); the user's logins end, their workspaces' records, prefs and
 * folder go, the audit log keeps the deed — and under S3 the root helper is
 * asked to `delete` the Linux account and home FIRST, so its refusal leaves
 * every row in place.
 * @author Nguyễn Ngọc Trí Vĩ <vinnt@smartgift.vn>
 */

const { describe, it, before, after } = 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(), "server-mode-user-delete-"));
const USERS = path.join(TMP, "users");
process.env.DASHBOARD_DB_PATH = path.join(TMP, "dashboard.db");
process.env.DASHBOARD_LIVENESS_PROBE = "0";

const { createApp, startServer } = require("../index");
const { db } = require("../db");
const auth = require("../lib/auth");
const linux = require("../lib/linux-accounts");

let server;
let BASE;
const ids = {};
const BOSS_PASS = "admin-pass-1";

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.status === 200 ? res.headers.get("set-cookie").split(";")[0] : null;
}

const lane = (cwd, owner) =>
  Number(
    db.prepare("INSERT INTO lanes (cwd, tool, owner_id) VALUES (?, 'claude', ?)").run(cwd, owner)
      .lastInsertRowid
  );

before(async () => {
  process.env.AGENTHUB_MODE = "server";
  process.env.AGENTHUB_USERS_ROOT = USERS;
  fs.mkdirSync(path.join(USERS, "mia", "proj"), { recursive: true });
  fs.writeFileSync(path.join(USERS, "mia", "proj", "a.txt"), "x");
  server = await startServer(createApp(), 0);
  BASE = `http://127.0.0.1:${server.address().port}`;
  ids.boss = (await auth.createUser("boss", BOSS_PASS, "admin")).id;
  ids.mia = (await auth.createUser("mia", "member-pass-1", "developer")).id;
  ids.miaLane = lane(path.join(USERS, "mia", "proj"), ids.mia);
  db.prepare("INSERT INTO user_prefs (user_key, prefs) VALUES (?, '{}')").run(`u${ids.mia}`);
});

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

describe("Delete user (DELETE /api/users/:id)", () => {
  it("needs the admin's own password, and never deletes yourself", async () => {
    const boss = await login("boss", BOSS_PASS);
    const wrong = await call("DELETE", `/api/users/${ids.mia}`, {
      cookie: boss,
      body: { currentPassword: "nope" },
    });
    assert.equal(wrong.status, 403);
    assert.equal(wrong.body.error.code, "EREAUTH");
    const self = await call("DELETE", `/api/users/${ids.boss}`, {
      cookie: boss,
      body: { currentPassword: BOSS_PASS },
    });
    assert.equal(self.status, 409);
    assert.equal(self.body.error.code, "ESELF");
    assert.ok(db.prepare("SELECT 1 FROM users WHERE id = ?").get(ids.mia));
  });

  it("refuses a developer", async () => {
    const mia = await login("mia", "member-pass-1");
    const r = await call("DELETE", `/api/users/${ids.boss}`, {
      cookie: mia,
      body: { currentPassword: "member-pass-1" },
    });
    assert.equal(r.status, 403);
  });

  it("deletes the user, their logins, workspaces' records, prefs and folder — audited", async () => {
    const miaCookie = await login("mia", "member-pass-1");
    const boss = await login("boss", BOSS_PASS);
    const r = await call("DELETE", `/api/users/${ids.mia}`, {
      cookie: boss,
      body: { currentPassword: BOSS_PASS },
    });
    assert.equal(r.status, 200, JSON.stringify(r.body));
    assert.equal(db.prepare("SELECT 1 FROM users WHERE id = ?").get(ids.mia), undefined);
    assert.equal(db.prepare("SELECT 1 FROM lanes WHERE id = ?").get(ids.miaLane), undefined);
    assert.equal(
      db.prepare("SELECT 1 FROM user_prefs WHERE user_key = ?").get(`u${ids.mia}`),
      undefined
    );
    assert.ok(!fs.existsSync(path.join(USERS, "mia")), "her folder is gone");
    // Her old login no longer works.
    assert.equal((await call("GET", "/api/me/account", { cookie: miaCookie })).status, 401);
    const audit = db
      .prepare("SELECT path FROM audit_log WHERE owner_id = ? ORDER BY id DESC")
      .get(ids.mia);
    assert.match(audit.path, /^delete mia/);
    // The same name can be made again, as a new account.
    const again = await auth.createUser("mia", "member-pass-3", "developer");
    assert.notEqual(again.id, ids.mia);
  });

  it("never deletes the last admin", () => {
    assert.throws(() => auth.deleteUser("boss"), { code: "ELASTADMIN" });
  });
});

describe("Delete user under S3", () => {
  const CONF = path.join(TMP, "server.conf");
  let calls;
  before(() => {
    fs.writeFileSync(CONF, `HOST_USER=h\nHOST_UID=1000\nUSERS_ROOT=${USERS}\n`);
    process.env.AGENTHUB_SERVER_CONF = CONF;
    linux.__resetConfCache();
  });

  it("asks the root helper to delete the account and home first", async () => {
    calls = [];
    linux.__setRunImpl((argv) => {
      calls.push(argv);
      return "ok";
    });
    const u = await auth.createUser("leo", "member-pass-2", "developer");
    calls = [];
    auth.deleteUser("leo");
    assert.deepEqual(calls, [["/opt/agenthub/sbin/agenthub-provision", "delete", "leo"]]);
    assert.equal(db.prepare("SELECT 1 FROM users WHERE id = ?").get(u.id), undefined);
  });

  it("keeps every row when the helper refuses", async () => {
    linux.__setRunImpl(() => "ok");
    const u = await auth.createUser("zoe", "member-pass-4", "developer");
    const zl = lane(path.join(USERS, "zoe", "p"), u.id);
    linux.__setRunImpl(() => {
      throw Object.assign(new Error("x"), { stderr: "ah-zoe is not an AgentHub member" });
    });
    assert.throws(() => auth.deleteUser("zoe"), { code: "EPROVISION" });
    assert.ok(db.prepare("SELECT 1 FROM users WHERE id = ?").get(u.id));
    assert.ok(db.prepare("SELECT 1 FROM lanes WHERE id = ?").get(zl));
  });
});