/**
 * @file server-mode-password-change.test.js
 * @description A password an admin GIVES (Users page create or reset) may be
 * anything non-empty, and the account must then pick its own before anything
 * else: its login reaches only the `/me` reads and `POST /api/me/password`
 * (EPWCHANGE), opens no WebSocket, and its own password must pass every rule
 * (EWEAKPASSWORD with the failed `rules`, never the current one). Also: the
 * last login survives a logout (`users.last_login_at`), the last enabled
 * admin can never be demoted or disabled (ELASTADMIN, the CLI's path
 * included) and old audit entries are pruned (`AGENTHUB_AUDIT_DAYS`).
 * @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-password-change-"));
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");

let server;
let BASE;
const BOSS_PASS = "Admin-pass-2026";

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 }),
  });
  if (res.status !== 200) return null;
  return { cookie: res.headers.get("set-cookie").split(";")[0], user: (await res.json()).user };
}

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");
});

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

describe("a password an admin gave", () => {
  it("is accepted weak, then the user must pick a strong one of their own", async () => {
    const boss = (await login("boss", BOSS_PASS)).cookie;
    const made = await call("POST", "/api/users", {
      cookie: boss,
      body: { username: "neo", password: "123", currentPassword: BOSS_PASS },
    });
    assert.equal(made.status, 201);
    assert.equal(made.body.user.mustChangePassword, true);

    const neo = await login("neo", "123");
    assert.equal(neo.user.mustChangePassword, true);
    // Only its own account and the password change, until it has one.
    assert.equal(
      (await call("GET", "/api/lanes", { cookie: neo.cookie })).body.error.code,
      "EPWCHANGE"
    );
    const patch = await call("PATCH", "/api/me/account", {
      cookie: neo.cookie,
      body: { displayName: "Neo" },
    });
    assert.equal(patch.body.error.code, "EPWCHANGE");
    assert.equal((await call("GET", "/api/me/account", { cookie: neo.cookie })).status, 200);
    const me = await call("GET", "/api/auth/me", { cookie: neo.cookie });
    assert.equal(me.body.user.mustChangePassword, true);

    const weak = await call("POST", "/api/me/password", {
      cookie: neo.cookie,
      body: { currentPassword: "123", newPassword: "neo12345" },
    });
    assert.equal(weak.status, 400);
    assert.equal(weak.body.error.code, "EWEAKPASSWORD");
    assert.deepEqual(weak.body.error.rules, ["upper", "symbol", "username"]);

    const ok = await call("POST", "/api/me/password", {
      cookie: neo.cookie,
      body: { currentPassword: "123", newPassword: "Green-Tea-42" },
    });
    assert.equal(ok.status, 200);
    assert.equal((await call("GET", "/api/lanes", { cookie: neo.cookie })).status, 200);
    assert.equal(
      (await call("GET", "/api/auth/me", { cookie: neo.cookie })).body.user.mustChangePassword,
      false
    );
  });

  it("an admin's reset flags the account again; their own new password must pass every rule", async () => {
    const boss = (await login("boss", BOSS_PASS)).cookie;
    const neoId = auth.findUser("neo").id;
    const reset = await call("PATCH", `/api/users/${neoId}`, {
      cookie: boss,
      body: { password: "abc", currentPassword: BOSS_PASS },
    });
    assert.equal(reset.status, 200);
    assert.equal(reset.body.user.mustChangePassword, true);
    assert.equal((await login("neo", "abc")).user.mustChangePassword, true);

    const bossId = auth.findUser("boss").id;
    const own = (password) =>
      call("PATCH", `/api/users/${bossId}`, {
        cookie: boss,
        body: { password, currentPassword: BOSS_PASS },
      });
    assert.equal((await own("123")).body.error.code, "EWEAKPASSWORD");
    const same = await own(BOSS_PASS);
    assert.equal(same.body.error.code, "EWEAKPASSWORD");
    assert.deepEqual(same.body.error.rules, ["reused"]);
    const done = await own("Blue-Sky-77!");
    assert.equal(done.status, 200);
    assert.equal(done.body.user.mustChangePassword, false);
  });
});

describe("account bookkeeping", () => {
  it("keeps the last login after the user signs out", async () => {
    const pass = "Blue-Sky-77!";
    const s = await login("boss", pass);
    await call("POST", "/api/auth/logout", { cookie: s.cookie });
    const id = auth.findUser("boss").id;
    db.prepare("DELETE FROM auth_sessions WHERE user_id = ?").run(id);
    const stats = auth.loginStats(id);
    assert.equal(stats.logins, 0);
    assert.ok(stats.lastLoginAt, "the last login is still known");
    assert.equal(auth.allLoginStats().get(id).lastLoginAt, stats.lastLoginAt);
  });

  it("never demotes, disables or deletes the last enabled admin", () => {
    for (const fn of [
      () => auth.setRole("boss", "developer"),
      () => auth.setDisabled("boss", true),
      () => auth.deleteUser("boss"),
    ]) {
      assert.throws(fn, { code: "ELASTADMIN" });
    }
    assert.equal(auth.findUser("boss").role, "admin");
    assert.equal(auth.findUser("boss").disabled, 0);
  });

  it("prunes audit entries older than AGENTHUB_AUDIT_DAYS", () => {
    const { pruneAudit } = require("../lib/audit");
    const insert = db.prepare(
      "INSERT INTO audit_log (user_id, owner_id, method, path, at) VALUES (1, 1, 'GET', ?, ?)"
    );
    insert.run("/old", new Date(Date.now() - 40 * 864e5).toISOString());
    insert.run("/new", new Date().toISOString());
    process.env.AGENTHUB_AUDIT_DAYS = "0";
    assert.equal(pruneAudit({ force: true }), 0, "0 keeps everything");
    process.env.AGENTHUB_AUDIT_DAYS = "30";
    assert.ok(pruneAudit({ force: true }) >= 1);
    const paths = db
      .prepare("SELECT path FROM audit_log")
      .all()
      .map((r) => r.path);
    assert.ok(!paths.includes("/old"));
    assert.ok(paths.includes("/new"));
  });
});