'use strict';

const test = require('node:test');
const assert = require('node:assert/strict');
const { SessionStore } = require('../src/session-store');
const {
  AltaClient,
  DEVICE_MAX_RESPONSE_BYTES,
  HIERARCHY_MAX_RESPONSE_BYTES,
  MAX_ARRAY_OBJECTS,
} = require('../src/alta-client');

const ORIGIN = 'https://tenant.avasecurity.com';
const SENTINEL = 'HERMES_SENTINEL_SECRET';

function readyStore() {
  const store = new SessionStore();
  store.establish(ORIGIN, SENTINEL);
  return store;
}

function response(data, overrides = {}) {
  return { status: 200, headers: {}, data, ...overrides };
}

test('uses only stored authority, fixed endpoint paths and hardened transport options', async () => {
  const calls = [];
  const transport = async (options) => {
    calls.push(options);
    if (options.url.endsWith('/devices')) return response([]);
    if (options.url.endsWith('/deviceSites')) return response([{ id: 'site-1' }]);
    if (options.url.endsWith('/deviceGroups')) return response([{ id: 'group-1' }]);
    return response({ user: 'engineer' });
  };
  const client = new AltaClient({ sessionStore: readyStore(), transport });

  assert.deepEqual(await client.getDevices(), []);
  assert.deepEqual(await client.getDeviceSites(), [{ id: 'site-1' }]);
  assert.deepEqual(await client.getDeviceGroups(), [{ id: 'group-1' }]);
  assert.deepEqual(await client.getAuthInfo(), { user: 'engineer' });

  assert.deepEqual(calls.map((call) => call.url), [
    `${ORIGIN}/api/v1/devices`,
    `${ORIGIN}/api/v1/deviceSites`,
    `${ORIGIN}/api/v1/deviceGroups`,
    `${ORIGIN}/api/v1/auth`,
  ]);
  for (const call of calls) {
    assert.equal(call.method, 'GET');
    assert.equal(call.proxy, false);
    assert.equal(call.maxRedirects, 0);
    assert.match(call.headers.Cookie, /^va=HERMES_SENTINEL_SECRET$/);
    assert.ok(call.timeout > 0 && call.timeout <= 30_000);
    assert.ok(call.maxResponseBytes > 0);
  }
});

test('uses endpoint-specific 32 MiB/4 MiB limits and a 30 second request deadline', async () => {
  const calls = [];
  const client = new AltaClient({
    sessionStore: readyStore(),
    transport: async (options) => { calls.push(options); return response([]); },
  });

  await client.getDevices();
  await client.getDeviceSites();
  await client.getDeviceGroups();

  assert.deepEqual(calls.map(({ maxResponseBytes }) => maxResponseBytes), [
    DEVICE_MAX_RESPONSE_BYTES,
    HIERARCHY_MAX_RESPONSE_BYTES,
    HIERARCHY_MAX_RESPONSE_BYTES,
  ]);
  assert.ok(calls.every(({ timeout }) => timeout > 0 && timeout <= 30_000));
});

test('accepts device bodies above 2 MiB and rejects bodies above 32 MiB before parsing', async () => {
  const acceptedBody = JSON.stringify([{
    guid: '550e8400-e29b-41d4-a716-446655440000',
    padding: 'x'.repeat((2 * 1024 * 1024) + 1),
  }]);
  const accepted = new AltaClient({
    sessionStore: readyStore(),
    transport: async () => response(Buffer.from(acceptedBody)),
  });
  assert.equal((await accepted.getDevices()).length, 1);

  const rejected = new AltaClient({
    sessionStore: readyStore(),
    transport: async () => response(Buffer.alloc(DEVICE_MAX_RESPONSE_BYTES + 1, 0x20)),
  });
  await assert.rejects(rejected.getDevices(), { code: 'ALTA_RESPONSE_TOO_LARGE' });
});

test('rejects plain array responses containing more than 10,000 objects', async () => {
  const client = new AltaClient({
    sessionStore: readyStore(),
    transport: async () => response(Array.from({ length: MAX_ARRAY_OBJECTS + 1 }, () => ({}))),
  });
  await assert.rejects(client.getDevices(), { code: 'ALTA_RESPONSE_TOO_MANY_OBJECTS' });
});

test('rejects renderer-supplied URL/cookie parameters before transport', async () => {
  let calls = 0;
  const client = new AltaClient({
    sessionStore: readyStore(),
    transport: async () => { calls += 1; return response([]); },
  });

  await assert.rejects(
    client.getDevices({ deploymentUrl: 'https://evil.example', cookies: [SENTINEL] }),
    { code: 'INVALID_ALTA_ARGUMENTS' },
  );
  await assert.rejects(client.getAuthInfo(SENTINEL), { code: 'INVALID_ALTA_ARGUMENTS' });
  assert.equal(calls, 0);
});

test('allows only bounded exact-same-origin redirects', async () => {
  const seen = [];
  const transport = async (options) => {
    seen.push(options.url);
    if (seen.length === 1) {
      return response('', { status: 307, headers: { location: '/api/v1/devices?cursor=next' } });
    }
    return response([]);
  };
  const client = new AltaClient({ sessionStore: readyStore(), transport });
  assert.deepEqual(await client.getDevices(), []);
  assert.deepEqual(seen, [
    `${ORIGIN}/api/v1/devices`,
    `${ORIGIN}/api/v1/devices?cursor=next`,
  ]);

  for (const location of [
    'https://evil.example/steal',
    'https://other.avasecurity.com/api/v1/devices',
    'http://tenant.avasecurity.com/api/v1/devices',
    '//evil.example/steal',
    `https://user:pass@tenant.avasecurity.com/api/v1/devices`,
    `${ORIGIN}/api/v1/devices#not-sent-to-server`,
  ]) {
    let count = 0;
    const blocked = new AltaClient({
      sessionStore: readyStore(),
      transport: async () => {
        count += 1;
        return response('', { status: 302, headers: { location } });
      },
    });
    await assert.rejects(blocked.getDevices(), { code: 'UNSAFE_ALTA_REDIRECT' });
    assert.equal(count, 1, location);
  }
});

test('enforces redirect limit and rejects redirects without locations', async () => {
  const looping = new AltaClient({
    sessionStore: readyStore(),
    maxRedirects: 2,
    transport: async () => response('', { status: 302, headers: { location: '/api/v1/devices' } }),
  });
  await assert.rejects(looping.getDevices(), { code: 'TOO_MANY_ALTA_REDIRECTS' });

  const missing = new AltaClient({
    sessionStore: readyStore(),
    transport: async () => response('', { status: 302, headers: {} }),
  });
  await assert.rejects(missing.getDevices(), { code: 'UNSAFE_ALTA_REDIRECT' });
});

test('enforces a total timeout even when injected transport does not cooperate', async () => {
  const client = new AltaClient({
    sessionStore: readyStore(),
    timeoutMs: 25,
    transport: async () => new Promise(() => {}),
  });
  await assert.rejects(client.getDevices(), { code: 'ALTA_TIMEOUT', timeout: true });
});

test('rejects oversized responses using content-length and actual data size', async () => {
  const byHeader = new AltaClient({
    sessionStore: readyStore(),
    maxResponseBytes: 32,
    transport: async () => response([], { headers: { 'content-length': '33' } }),
  });
  await assert.rejects(byHeader.getDevices(), { code: 'ALTA_RESPONSE_TOO_LARGE' });

  const byBody = new AltaClient({
    sessionStore: readyStore(),
    maxResponseBytes: 32,
    transport: async () => response(JSON.stringify([{ value: 'x'.repeat(40) }])),
  });
  await assert.rejects(byBody.getDevices(), { code: 'ALTA_RESPONSE_TOO_LARGE' });

  for (const status of [302, 500]) {
    const oversizedFailure = new AltaClient({
      sessionStore: readyStore(),
      maxResponseBytes: 32,
      transport: async () => response('x'.repeat(33), {
        status,
        headers: status === 302 ? { location: '/api/v1/devices' } : {},
      }),
    });
    await assert.rejects(oversizedFailure.getDevices(), { code: 'ALTA_RESPONSE_TOO_LARGE' });
  }
});

test('rejects malformed response envelopes, JSON, status and endpoint data shapes', async () => {
  const cases = [
    [undefined, 'INVALID_ALTA_RESPONSE'],
    [response('{broken'), 'INVALID_ALTA_RESPONSE_DATA'],
    [response([], { status: 500 }), 'ALTA_HTTP_ERROR'],
    [response({ not: 'an array' }), 'INVALID_ALTA_RESPONSE_DATA'],
  ];
  for (const [value, code] of cases) {
    const client = new AltaClient({ sessionStore: readyStore(), transport: async () => value });
    await assert.rejects(client.getDevices(), { code });
  }

  const authClient = new AltaClient({ sessionStore: readyStore(), transport: async () => response([]) });
  await assert.rejects(authClient.getAuthInfo(), { code: 'INVALID_ALTA_RESPONSE_DATA' });
});

test('returns a fresh allowlisted error when transport throws an ALTA error with secret-bearing fields', async () => {
  const source = Object.assign(new Error(`Alta request failed for va=${SENTINEL}`), {
    code: 'ALTA_TRANSPORT_FAILURE',
    status: 503,
    timeout: true,
    config: { headers: { Cookie: `va=${SENTINEL}` }, data: SENTINEL },
    request: { headers: { Cookie: `va=${SENTINEL}` }, body: SENTINEL },
    response: { status: 502, headers: { 'set-cookie': `va=${SENTINEL}` }, data: SENTINEL },
    body: SENTINEL,
  });
  const client = new AltaClient({
    sessionStore: readyStore(),
    transport: async () => { throw source; },
  });

  const caught = await client.getDevices().catch((error) => error);
  assert.notEqual(caught, source);
  assert.equal(caught.code, 'ALTA_TRANSPORT_FAILURE');
  assert.equal(caught.message, 'Alta request failed for va=[REDACTED]');
  assert.equal(caught.status, 502);
  assert.equal(caught.timeout, true);
  assert.deepEqual(Object.keys(caught).sort(), ['code', 'status', 'timeout']);
  for (const field of ['config', 'request', 'response', 'headers', 'data', 'body']) {
    assert.equal(field in caught, false, field);
  }
  assert.doesNotMatch(JSON.stringify(caught), new RegExp(SENTINEL));
});

test('safely formats a transport error whose code getter throws a secret', async () => {
  const source = new Error('Transport failed safely');
  Object.defineProperty(source, 'code', {
    enumerable: true,
    get() { throw new Error(SENTINEL); },
  });
  source.config = { headers: { Cookie: `va=${SENTINEL}` } };
  const client = new AltaClient({
    sessionStore: readyStore(),
    transport: async () => { throw source; },
  });

  const caught = await client.getDevices().catch((error) => error);
  assert.notEqual(caught, source);
  assert.equal(caught.code, 'ALTA_ERROR');
  assert.equal(caught.message, 'Transport failed safely');
  assert.equal(caught.status, null);
  assert.equal(caught.timeout, false);
  assert.deepEqual(Object.keys(caught).sort(), ['code', 'status', 'timeout']);
  assert.equal('config' in caught, false);
  assert.doesNotMatch(JSON.stringify(caught), new RegExp(SENTINEL));
});

test('revalidates the stored origin before each request', async () => {
  const store = { requireSession: () => Object.freeze({ origin: 'https://evil.example', cookie: SENTINEL }) };
  let called = false;
  const client = new AltaClient({ sessionStore: store, transport: async () => { called = true; } });
  await assert.rejects(client.getDevices(), { code: 'INVALID_ALTA_ORIGIN' });
  assert.equal(called, false);
});