/**
 * @file server-mode-auth.test.js
 * @description Server mode's login gate (server/lib/auth.js, routes/auth.js):
 * local mode untouched, every API call behind a login, roles (analyst
 * read-only, admin-only config writes), hooks from this machine only, logout
 * and disable ending a login, the failed-login throttle, the WebSocket check,
 * and the same-origin guard accepting the dashboard's own allowed Host.
 * @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("path");
const fs = require("fs");
const os = require("os");

const TEST_DB = path.join(os.tmpdir(), `server-mode-test-${Date.now()}-${process.pid}.db`);
process.env.DASHBOARD_DB_PATH = TEST_DB;
process.env.DASHBOARD_LIVENESS_PROBE = "0";

const { createApp, startServer } = require("../index");
const auth = require("../lib/auth");
const { sameOriginGuard } = require("../lib/same-origin");

let server;
let BASE;

async function call(method, p, { cookie, body, headers = {} } = {}) {
  const res = await fetch(BASE + p, {
    method,
    headers: {
      "Content-Type": "application/json",
      ...(cookie ? { cookie } : {}),
      ...headers,
    },
    body: body ? JSON.stringify(body) : undefined,
  });
  const text = await res.text();
  let json = null;
  try {
    json = JSON.parse(text);
  } catch {
    /* not JSON */
  }
  return { status: res.status, body: json, setCookie: res.headers.get("set-cookie") };
}

async function loginAs(username, password) {
  const r = await call("POST", "/api/auth/login", { body: { username, password } });
  assert.equal(r.status, 200, JSON.stringify(r.body));
  return r.setCookie.split(";")[0];
}

before(async () => {
  server = await startServer(createApp(), 0);
  BASE = `http://127.0.0.1:${server.address().port}`;
  await auth.createUser("boss", "admin-pass-1", "admin");
  await auth.createUser("mia", "member-pass-1", "developer");
  await auth.createUser("ana", "analyst-pass-1", "analyst");
});

after(() => {
  delete process.env.AGENTHUB_MODE;
  server?.close();
  for (const f of [TEST_DB, `${TEST_DB}-wal`, `${TEST_DB}-shm`, `${TEST_DB}-migrate.lock`]) {
    fs.rmSync(f, { force: true });
  }
});

describe("local mode (the default)", () => {
  it("needs no login and says it is local", async () => {
    delete process.env.AGENTHUB_MODE;
    assert.equal((await call("GET", "/api/sessions")).status, 200);
    assert.deepEqual((await call("GET", "/api/auth/me")).body, { mode: "local" });
    assert.equal((await call("POST", "/api/auth/login", { body: {} })).status, 404);
    // The one local viewer keeps their prefs too.
    const chat = { prefs: { "agenthub.chatUi": "1" } };
    assert.equal((await call("PUT", "/api/me/prefs", { body: chat })).status, 200);
    assert.equal((await call("GET", "/api/me/prefs")).body.prefs["agenthub.chatUi"], "1");
  });
});

describe("server mode", () => {
  before(() => {
    process.env.AGENTHUB_MODE = "server";
  });

  it("refuses the API without a login, but answers health and /auth/me", async () => {
    const r = await call("GET", "/api/sessions");
    assert.equal(r.status, 401);
    assert.equal(r.body.error.code, "EAUTH");
    assert.equal((await call("GET", "/api/health")).status, 200);
    assert.deepEqual((await call("GET", "/api/auth/me")).body, { mode: "server", user: null });
  });

  it("rejects a wrong password and sets an httpOnly strict cookie on a right one", async () => {
    const bad = await call("POST", "/api/auth/login", { body: { username: "mia", password: "x" } });
    assert.equal(bad.status, 401);
    assert.equal(bad.body.error.code, "EBADLOGIN");
    const ok = await call("POST", "/api/auth/login", {
      body: { username: "MIA", password: "member-pass-1" },
    });
    assert.equal(ok.status, 200);
    assert.equal(ok.body.user.username, "mia");
    assert.match(ok.setCookie, /agenthub_sid=[^;]+; Path=\/; HttpOnly; SameSite=Strict/);
    const cookie = ok.setCookie.split(";")[0];
    assert.equal((await call("GET", "/api/sessions", { cookie })).status, 200);
    assert.equal((await call("GET", "/api/auth/me", { cookie })).body.user.role, "developer");
  });

  it("lets an analyst work but keeps the host's config writes an admin's", async () => {
    const analyst = await loginAs("ana", "analyst-pass-1");
    assert.equal((await call("GET", "/api/sessions", { cookie: analyst })).status, 200);
    // Past the role gate: the route itself answers the empty body.
    const w = await call("POST", "/api/lanes/ensure", { cookie: analyst, body: {} });
    assert.ok(![401, 403].includes(w.status), `got ${w.status}`);
    for (const [method, url] of [
      ["PUT", "/api/settings/no-such-route"],
      ["POST", "/api/settings/quit"],
      ["POST", "/api/alerts/rules"],
      ["DELETE", "/api/alerts/rules/x"],
    ]) {
      const r = await call(method, url, { cookie: analyst, body: {} });
      assert.equal(r.status, 403, `${method} ${url}`);
      assert.equal(r.body.error.code, "EADMIN");
    }

    const member = await loginAs("mia", "member-pass-1");
    // A path no router answers: the guard decides before any handler could
    // write the real settings file.
    const m = await call("PUT", "/api/settings/no-such-route", { cookie: member, body: {} });
    assert.equal(m.status, 403);
    assert.equal(m.body.error.code, "EADMIN");

    const admin = await loginAs("boss", "admin-pass-1");
    const a = await call("PUT", "/api/settings/no-such-route", { cookie: admin, body: {} });
    assert.equal(a.status, 404);
  });

  it("takes hooks from this machine only", async () => {
    const remote = await call("POST", "/api/hooks/event", {
      body: {},
      headers: { "x-forwarded-for": "203.0.113.9" },
    });
    assert.equal(remote.status, 403);
    assert.equal(remote.body.error.code, "ELOCALONLY");
    const local = await call("POST", "/api/hooks/event", { body: {} });
    assert.ok(![401, 403].includes(local.status), `got ${local.status}`);
  });

  it("ends a login on logout and on disable", async () => {
    const one = await loginAs("mia", "member-pass-1");
    await call("POST", "/api/auth/logout", { cookie: one });
    assert.equal((await call("GET", "/api/sessions", { cookie: one })).status, 401);

    const two = await loginAs("mia", "member-pass-1");
    auth.setDisabled("mia", true);
    assert.equal((await call("GET", "/api/sessions", { cookie: two })).status, 401);
    const again = await call("POST", "/api/auth/login", {
      body: { username: "mia", password: "member-pass-1" },
    });
    assert.equal(again.status, 401);
    auth.setDisabled("mia", false);
  });

  it("keeps each user's UI prefs apart, and only for a logged-in caller", async () => {
    assert.equal((await call("GET", "/api/me/prefs")).status, 401);
    const boss = await loginAs("boss", "admin-pass-1");
    const ana = await loginAs("ana", "analyst-pass-1");
    const on = { prefs: { "agenthub.chatUi": "1" } };
    const put = await call("PUT", "/api/me/prefs", { cookie: boss, body: on });
    assert.deepEqual(put.body.prefs, { "agenthub.chatUi": "1" });
    assert.equal(
      (await call("GET", "/api/me/prefs", { cookie: ana })).body.prefs["agenthub.chatUi"],
      undefined
    );
    for (const prefs of [{ "agenthub.chatUi": true }, { userKey: "u1" }]) {
      const bad = await call("PUT", "/api/me/prefs", { cookie: ana, body: { prefs } });
      assert.equal(bad.status, 400);
      assert.equal(bad.body.error.code, "EBADPREFS");
    }
    // null removes the key: back to the default.
    await call("PUT", "/api/me/prefs", {
      cookie: boss,
      body: { prefs: { "agenthub.chatUi": null } },
    });
    assert.deepEqual((await call("GET", "/api/me/prefs", { cookie: boss })).body.prefs, {});
    // The appearance (useTheme's storage keys) follows the account too.
    const look = {
      theme: "light",
      "agenthub.theme.light": "canvas",
      "agenthub.theme.dark": "darcula",
    };
    const saved = await call("PUT", "/api/me/prefs", { cookie: ana, body: { prefs: look } });
    assert.equal(saved.status, 200);
    assert.deepEqual(saved.body.prefs, look);
  });

  it("checks a WebSocket upgrade's login and Origin", async () => {
    const cookie = await loginAs("boss", "admin-pass-1");
    const req = (headers, url = "/ws") => ({ url, headers: { host: "127.0.0.1:1", ...headers } });
    assert.equal(auth.isWebSocketLoggedIn(req({})), false);
    assert.equal(auth.isWebSocketLoggedIn(req({ cookie })), true);
    assert.equal(auth.isWebSocketLoggedIn(req({ cookie, origin: "https://evil.example" })), false);
    const analyst = await loginAs("ana", "analyst-pass-1");
    assert.equal(auth.isWebSocketLoggedIn(req({ cookie: analyst })), true);
    // Which runs an analyst may type into is the run check's (canSeeRun), not this one's.
    assert.equal(
      auth.isWebSocketLoggedIn(req({ cookie: analyst }, "/ws-pty/agenthub-lane-1")),
      true
    );
  });

  // Last: it locks this test's address out of logging in.
  it("throttles repeated failed logins", async () => {
    let last;
    for (let i = 0; i < 11; i++) {
      last = await call("POST", "/api/auth/login", { body: { username: "boss", password: "no" } });
    }
    assert.equal(last.status, 429);
    assert.equal(last.body.error.code, "ETOOMANY");
  });
});

describe("sameOriginGuard", () => {
  const run = (headers) => {
    let status = 200;
    let passed = false;
    const res = {
      status(s) {
        status = s;
        return this;
      },
      json() {
        return this;
      },
    };
    sameOriginGuard({ headers }, res, () => (passed = true));
    return passed ? 200 : status;
  };

  it("accepts the dashboard's own allowed Host as an Origin", () => {
    process.env.DASHBOARD_ALLOWED_HOSTS = "agenthub.example.com";
    try {
      assert.equal(
        run({ origin: "https://agenthub.example.com", host: "agenthub.example.com" }),
        200
      );
      assert.equal(run({ origin: "https://evil.example", host: "agenthub.example.com" }), 403);
      assert.equal(run({ origin: "https://evil.example", host: "evil.example" }), 403);
      assert.equal(run({ origin: "http://localhost:4820", host: "localhost:4820" }), 200);
      assert.equal(run({}), 200);
    } finally {
      delete process.env.DASHBOARD_ALLOWED_HOSTS;
    }
  });
});

describe("server mode prefix checks follow Express routing", () => {
  before(() => {
    process.env.AGENTHUB_MODE = "server";
  });
  it("refuses a member a staff-only router reached by case or encoding", async () => {
    const r = await call("POST", "/api/auth/login", {
      body: { username: "mia", password: "member-pass-1" },
      headers: { "x-forwarded-for": "198.51.100.7" },
    });
    const cookie = r.setCookie.split(";")[0];
    for (const p of ["/api/webhooks", "/api/Webhooks", "/api/%77ebhooks", "/api//webhooks"]) {
      const res = await call("GET", p, { cookie });
      assert.ok([403, 404].includes(res.status), `${p} answered ${res.status}`);
    }
    const hook = await call("POST", "/api/Hooks/event", {
      body: {},
      headers: { "x-forwarded-for": "203.0.113.9" },
    });
    assert.equal(hook.status, 403);
  });
});