/**
 * Integration tests for the v2 host core.
 * Tests routing, session creation, message writing, and delivery
 * without spawning actual containers.
 */
import Database from 'better-sqlite3';
import fs from 'fs';
import path from 'path';
import { describe, it, expect, beforeEach, afterEach, vi } from 'vitest';

import {
  initTestDb,
  closeDb,
  runMigrations,
  createAgentGroup,
  createMessagingGroup,
  createMessagingGroupAgent,
} from './db/index.js';
import {
  resolveSession,
  writeSessionMessage,
  writeSessionRouting,
  initSessionFolder,
  sessionDir,
  inboundDbPath,
  outboundDbPath,
  readOutboxFiles,
  clearOutbox,
} from './session-manager.js';
import { getSession, findSession, findSessionByAgentGroup } from './db/sessions.js';
import type { InboundEvent } from './channels/adapter.js';

// Mock container runner to prevent actual Docker spawning
vi.mock('./container-runner.js', () => ({
  wakeContainer: vi.fn().mockResolvedValue(undefined),
  isContainerRunning: vi.fn().mockReturnValue(false),
  getActiveContainerCount: vi.fn().mockReturnValue(0),
  killContainer: vi.fn(),
}));

// Override DATA_DIR for tests
vi.mock('./config.js', async () => {
  const actual = await vi.importActual('./config.js');
  return { ...actual, DATA_DIR: '/tmp/nanoclaw-test-host' };
});

function now() {
  return new Date().toISOString();
}

const TEST_DIR = '/tmp/nanoclaw-test-host';

beforeEach(() => {
  // Clean test directory
  if (fs.existsSync(TEST_DIR)) fs.rmSync(TEST_DIR, { recursive: true });
  fs.mkdirSync(TEST_DIR, { recursive: true });

  const db = initTestDb();
  runMigrations(db);
});

afterEach(() => {
  closeDb();
  if (fs.existsSync(TEST_DIR)) fs.rmSync(TEST_DIR, { recursive: true });
});

describe('session manager', () => {
  beforeEach(() => {
    createAgentGroup({
      id: 'ag-1',
      name: 'Test Agent',
      folder: 'test-agent',
      agent_provider: null,
      created_at: now(),
    });
    createMessagingGroup({
      id: 'mg-1',
      channel_type: 'discord',
      platform_id: 'chan-123',
      name: 'General',
      is_group: 1,
      unknown_sender_policy: 'strict',
      created_at: now(),
    });
  });

  it('should create session folder and both DBs', () => {
    initSessionFolder('ag-1', 'sess-test');
    const dir = sessionDir('ag-1', 'sess-test');
    expect(fs.existsSync(dir)).toBe(true);
    expect(fs.existsSync(path.join(dir, 'outbox'))).toBe(true);

    // Verify inbound.db
    const inPath = inboundDbPath('ag-1', 'sess-test');
    expect(fs.existsSync(inPath)).toBe(true);
    const inDb = new Database(inPath);
    const inTables = inDb.prepare("SELECT name FROM sqlite_master WHERE type='table'").all() as Array<{ name: string }>;
    expect(inTables.map((t) => t.name)).toContain('messages_in');
    expect(inTables.map((t) => t.name)).toContain('delivered');
    inDb.close();

    // Verify outbound.db
    const outPath = outboundDbPath('ag-1', 'sess-test');
    expect(fs.existsSync(outPath)).toBe(true);
    const outDb = new Database(outPath);
    const outTables = outDb.prepare("SELECT name FROM sqlite_master WHERE type='table'").all() as Array<{
      name: string;
    }>;
    expect(outTables.map((t) => t.name)).toContain('messages_out');
    expect(outTables.map((t) => t.name)).toContain('processing_ack');
    outDb.close();
  });

  it('should reject outbound attachment filenames that escape the message outbox', () => {
    initSessionFolder('ag-1', 'sess-test');
    const dir = sessionDir('ag-1', 'sess-test');
    const msgOutbox = path.join(dir, 'outbox', 'msg-1');
    fs.mkdirSync(msgOutbox, { recursive: true });

    const outside = path.join(TEST_DIR, 'outside.txt');
    fs.writeFileSync(outside, 'outside secret');

    expect(readOutboxFiles('ag-1', 'sess-test', 'msg-1', ['../../../../../outside.txt'])).toBeUndefined();
  });

  it('should reject outbound attachment symlinks that escape the message outbox', () => {
    initSessionFolder('ag-1', 'sess-test');
    const dir = sessionDir('ag-1', 'sess-test');
    const msgOutbox = path.join(dir, 'outbox', 'msg-1');
    fs.mkdirSync(msgOutbox, { recursive: true });

    const outside = path.join(TEST_DIR, 'outside.txt');
    fs.writeFileSync(outside, 'outside secret');
    fs.symlinkSync('../../../../../outside.txt', path.join(msgOutbox, 'safe-name.txt'));

    expect(readOutboxFiles('ag-1', 'sess-test', 'msg-1', ['safe-name.txt'])).toBeUndefined();
  });

  it('should not recursively delete outside the outbox for unsafe message ids', () => {
    initSessionFolder('ag-1', 'sess-test');
    const victimDir = path.join(TEST_DIR, 'victim-dir');
    fs.mkdirSync(victimDir, { recursive: true });
    fs.writeFileSync(path.join(victimDir, 'keep.txt'), 'do not delete');

    clearOutbox('ag-1', 'sess-test', '../../../../victim-dir');

    expect(fs.existsSync(path.join(victimDir, 'keep.txt'))).toBe(true);
  });

  it('should still read and clear normal basename outbox files', () => {
    initSessionFolder('ag-1', 'sess-test');
    const dir = sessionDir('ag-1', 'sess-test');
    const msgOutbox = path.join(dir, 'outbox', 'msg-1');
    fs.mkdirSync(msgOutbox, { recursive: true });
    fs.writeFileSync(path.join(msgOutbox, 'result.txt'), 'ok');

    const files = readOutboxFiles('ag-1', 'sess-test', 'msg-1', ['result.txt']);
    expect(files).toHaveLength(1);
    expect(files?.[0]?.filename).toBe('result.txt');
    expect(files?.[0]?.data.toString()).toBe('ok');

    clearOutbox('ag-1', 'sess-test', 'msg-1');
    expect(fs.existsSync(msgOutbox)).toBe(false);
  });

  it('should reject inbound attachment writes through a pre-placed symlinked inbox dir', () => {
    initSessionFolder('ag-1', 'sess-test');
    const { session } = resolveSession('ag-1', 'mg-1', null, 'shared');

    // The container has /workspace write access, so it can pre create
    // inbox/<msgId> as a symlink to escape.
    const inboxRoot = path.join(sessionDir('ag-1', session.id), 'inbox');
    fs.mkdirSync(inboxRoot, { recursive: true });
    const evilTarget = path.join(TEST_DIR, 'evil-target');
    fs.mkdirSync(evilTarget, { recursive: true });
    fs.symlinkSync(evilTarget, path.join(inboxRoot, 'msg-evil'));

    writeSessionMessage('ag-1', session.id, {
      id: 'msg-evil',
      kind: 'chat',
      timestamp: now(),
      content: JSON.stringify({
        text: 'evil',
        attachments: [{ name: 'photo.png', data: Buffer.from('PNGBYTES').toString('base64'), size: 8 }],
      }),
    });

    expect(fs.existsSync(path.join(evilTarget, 'photo.png'))).toBe(false);
  });

  it('should refuse to follow a pre-existing symlink at the inbound attachment path', () => {
    initSessionFolder('ag-1', 'sess-test');
    const { session } = resolveSession('ag-1', 'mg-1', null, 'shared');

    // The container pre creates inbox/<msgId>/photo.png as a symlink to a
    // host file. Without the wx flag, writeFileSync would follow it.
    const inboxDir = path.join(sessionDir('ag-1', session.id), 'inbox', 'msg-sym');
    fs.mkdirSync(inboxDir, { recursive: true });
    const outside = path.join(TEST_DIR, 'outside.txt');
    fs.writeFileSync(outside, 'ORIGINAL');
    fs.symlinkSync(outside, path.join(inboxDir, 'photo.png'));

    writeSessionMessage('ag-1', session.id, {
      id: 'msg-sym',
      kind: 'chat',
      timestamp: now(),
      content: JSON.stringify({
        text: 'sym',
        attachments: [{ name: 'photo.png', data: Buffer.from('PNGBYTES').toString('base64'), size: 8 }],
      }),
    });

    expect(fs.readFileSync(outside, 'utf-8')).toBe('ORIGINAL');
  });

  it('should reject inbound attachments when messageId is unsafe', () => {
    initSessionFolder('ag-1', 'sess-test');
    const { session } = resolveSession('ag-1', 'mg-1', null, 'shared');

    writeSessionMessage('ag-1', session.id, {
      id: '../../escape',
      kind: 'chat',
      timestamp: now(),
      content: JSON.stringify({
        text: 'msgid',
        attachments: [{ name: 'photo.png', data: Buffer.from('PNGBYTES').toString('base64'), size: 8 }],
      }),
    });

    const inboxRoot = path.join(sessionDir('ag-1', session.id), 'inbox');
    if (fs.existsSync(inboxRoot)) {
      expect(fs.readdirSync(inboxRoot)).toEqual([]);
    }
  });

  it('should still save inbound attachments with safe basenames', () => {
    initSessionFolder('ag-1', 'sess-test');
    const { session } = resolveSession('ag-1', 'mg-1', null, 'shared');

    writeSessionMessage('ag-1', session.id, {
      id: 'msg-ok',
      kind: 'chat',
      timestamp: now(),
      content: JSON.stringify({
        text: 'ok',
        attachments: [{ name: 'photo.png', data: Buffer.from('PNGBYTES').toString('base64'), size: 8 }],
      }),
    });

    const expected = path.join(sessionDir('ag-1', session.id), 'inbox', 'msg-ok', 'photo.png');
    expect(fs.existsSync(expected)).toBe(true);
    expect(fs.readFileSync(expected, 'utf-8')).toBe('PNGBYTES');
  });

  it('should resolve to existing session (shared mode)', () => {
    const { session: s1, created: c1 } = resolveSession('ag-1', 'mg-1', null, 'shared');
    expect(c1).toBe(true);

    const { session: s2, created: c2 } = resolveSession('ag-1', 'mg-1', null, 'shared');
    expect(c2).toBe(false);
    expect(s2.id).toBe(s1.id);
  });

  it('should create separate sessions per thread (per-thread mode)', () => {
    const { session: s1 } = resolveSession('ag-1', 'mg-1', 'thread-1', 'per-thread');
    const { session: s2 } = resolveSession('ag-1', 'mg-1', 'thread-2', 'per-thread');
    expect(s1.id).not.toBe(s2.id);
  });

  it('should reuse session for same thread', () => {
    const { session: s1 } = resolveSession('ag-1', 'mg-1', 'thread-1', 'per-thread');
    const { session: s2, created } = resolveSession('ag-1', 'mg-1', 'thread-1', 'per-thread');
    expect(created).toBe(false);
    expect(s2.id).toBe(s1.id);
  });

  it('should write message to inbound DB', () => {
    const { session } = resolveSession('ag-1', 'mg-1', null, 'shared');

    writeSessionMessage('ag-1', session.id, {
      id: 'msg-1',
      kind: 'chat',
      timestamp: now(),
      platformId: 'chan-123',
      channelType: 'discord',
      threadId: null,
      content: JSON.stringify({ sender: 'User', text: 'Hello' }),
    });

    // Read from the inbound DB
    const dbPath = inboundDbPath('ag-1', session.id);
    const db = new Database(dbPath);
    const rows = db.prepare('SELECT * FROM messages_in').all() as Array<{
      id: string;
      kind: string;
      status: string;
      content: string;
    }>;
    db.close();

    expect(rows).toHaveLength(1);
    expect(rows[0].id).toBe('msg-1');
    expect(rows[0].status).toBe('pending');
    expect(JSON.parse(rows[0].content).text).toBe('Hello');
  });

  it('should update last_active on message write', () => {
    const { session } = resolveSession('ag-1', 'mg-1', null, 'shared');
    expect(getSession(session.id)!.last_active).toBeNull();

    writeSessionMessage('ag-1', session.id, {
      id: 'msg-1',
      kind: 'chat',
      timestamp: now(),
      content: JSON.stringify({ text: 'hi' }),
    });

    expect(getSession(session.id)!.last_active).not.toBeNull();
  });

  it('should refuse path-traversal in attachment filenames', () => {
    // Regression: attachment.name comes from untrusted senders (E2EE-protected
    // chat platforms can't sanitize it server-side). Without the guard, a
    // `../../../tmp/pwned` filename escapes the inbox dir and writes anywhere
    // the host process can reach.
    const { session } = resolveSession('ag-1', 'mg-1', null, 'shared');
    const inboxBase = path.join(sessionDir('ag-1', session.id), 'inbox');
    const escapeTarget = path.join('/tmp', 'nanoclaw-traversal-canary');
    if (fs.existsSync(escapeTarget)) fs.rmSync(escapeTarget);

    writeSessionMessage('ag-1', session.id, {
      id: 'msg-attack',
      kind: 'chat',
      timestamp: now(),
      content: JSON.stringify({
        text: 'pwn',
        attachments: [
          {
            type: 'document',
            name: '../../../../../../../../tmp/nanoclaw-traversal-canary',
            data: Buffer.from('owned').toString('base64'),
          },
        ],
      }),
    });

    expect(fs.existsSync(escapeTarget)).toBe(false);
    // The bytes should still land — under a synthesized safe name inside the
    // inbox — so the agent doesn't lose data on a malicious filename.
    const inboxDir = path.join(inboxBase, 'msg-attack');
    expect(fs.existsSync(inboxDir)).toBe(true);
    const written = fs.readdirSync(inboxDir);
    expect(written).toHaveLength(1);
    expect(written[0]).not.toContain('/');
    expect(written[0]).not.toContain('..');
  });
});

describe('router', () => {
  beforeEach(() => {
    createAgentGroup({
      id: 'ag-1',
      name: 'Test Agent',
      folder: 'test-agent',
      agent_provider: null,
      created_at: now(),
    });
    // Use 'public' policy so the router tests exercise routing, not the
    // access gate. Dedicated access-gate tests live with the access module.
    createMessagingGroup({
      id: 'mg-1',
      channel_type: 'discord',
      platform_id: 'chan-123',
      name: 'General',
      is_group: 1,
      unknown_sender_policy: 'public',
      created_at: now(),
    });
    createMessagingGroupAgent({
      id: 'mga-1',
      messaging_group_id: 'mg-1',
      agent_group_id: 'ag-1',
      engage_mode: 'pattern',
      engage_pattern: '.',
      sender_scope: 'all',
      ignored_message_policy: 'drop',
      session_mode: 'shared',
      priority: 0,
      created_at: now(),
    });
  });

  it('should route a message end-to-end', async () => {
    const { routeInbound } = await import('./router.js');
    const { wakeContainer } = await import('./container-runner.js');

    const event: InboundEvent = {
      channelType: 'discord',
      platformId: 'chan-123',
      threadId: null,
      message: {
        id: 'msg-in-1',
        kind: 'chat',
        content: JSON.stringify({ sender: 'User', text: 'Hello agent!' }),
        timestamp: now(),
      },
    };

    await routeInbound(event);

    // Verify session was created
    const session = findSession('mg-1', null);
    expect(session).toBeDefined();

    // Verify message was written to inbound DB
    const dbPath = inboundDbPath('ag-1', session!.id);
    const db = new Database(dbPath);
    const rows = db.prepare('SELECT * FROM messages_in').all() as Array<{ id: string; content: string }>;
    db.close();

    expect(rows).toHaveLength(1);
    expect(JSON.parse(rows[0].content).text).toBe('Hello agent!');

    // Verify container was woken
    expect(wakeContainer).toHaveBeenCalled();
  });

  it('auto-creates messaging group only when the bot is addressed (mention/DM)', async () => {
    // The router's no-mg branch is escalation-gated: plain chatter on an
    // unknown channel stays silent (no DB writes) so a bot that sits in
    // many unwired channels doesn't bloat messaging_groups. Only explicit
    // mentions and DMs trigger auto-create.
    const { routeInbound } = await import('./router.js');
    const { getMessagingGroupByPlatform } = await import('./db/messaging-groups.js');

    // Plain message on unknown channel — should NOT auto-create.
    await routeInbound({
      channelType: 'slack',
      platformId: 'C-PLAIN',
      threadId: null,
      message: {
        id: 'msg-plain',
        kind: 'chat',
        content: JSON.stringify({ sender: 'User', text: 'Hi' }),
        timestamp: now(),
      },
    });
    expect(getMessagingGroupByPlatform('slack', 'C-PLAIN')).toBeUndefined();

    // Mention on unknown channel — SHOULD auto-create (next step: channel-registration flow).
    await routeInbound({
      channelType: 'slack',
      platformId: 'C-MENTIONED',
      threadId: null,
      message: {
        id: 'msg-mentioned',
        kind: 'chat',
        content: JSON.stringify({ sender: 'User', text: '@bot hi' }),
        timestamp: now(),
        isMention: true,
      },
    });
    expect(getMessagingGroupByPlatform('slack', 'C-MENTIONED')).toBeDefined();
  });

  it('should route multiple messages to the same session', async () => {
    const { routeInbound } = await import('./router.js');

    await routeInbound({
      channelType: 'discord',
      platformId: 'chan-123',
      threadId: null,
      message: { id: 'msg-a', kind: 'chat', content: JSON.stringify({ sender: 'A', text: 'First' }), timestamp: now() },
    });

    await routeInbound({
      channelType: 'discord',
      platformId: 'chan-123',
      threadId: null,
      message: {
        id: 'msg-b',
        kind: 'chat',
        content: JSON.stringify({ sender: 'B', text: 'Second' }),
        timestamp: now(),
      },
    });

    // Both should be in the same session
    const session = findSession('mg-1', null);
    const dbPath = inboundDbPath('ag-1', session!.id);
    const db = new Database(dbPath);
    const rows = db.prepare('SELECT * FROM messages_in ORDER BY timestamp').all();
    db.close();

    expect(rows).toHaveLength(2);
  });

  it('fans out to every matching agent, each in its own session', async () => {
    const { routeInbound } = await import('./router.js');
    const { wakeContainer } = await import('./container-runner.js');
    (wakeContainer as unknown as ReturnType<typeof vi.fn>).mockClear();

    // Wire a second agent to the same messaging group.
    createAgentGroup({
      id: 'ag-2',
      name: 'Secondary Agent',
      folder: 'secondary-agent',
      agent_provider: null,
      created_at: now(),
    });
    createMessagingGroupAgent({
      id: 'mga-2',
      messaging_group_id: 'mg-1',
      agent_group_id: 'ag-2',
      engage_mode: 'pattern',
      engage_pattern: '.',
      sender_scope: 'all',
      ignored_message_policy: 'drop',
      session_mode: 'shared',
      priority: 0,
      created_at: now(),
    });

    await routeInbound({
      channelType: 'discord',
      platformId: 'chan-123',
      threadId: null,
      message: { id: 'msg-fan', kind: 'chat', content: JSON.stringify({ text: 'hello all' }), timestamp: now() },
    });

    // Both agents should now have their own session and be woken.
    expect(wakeContainer).toHaveBeenCalledTimes(2);

    const { getSessionsByAgentGroup } = await import('./db/sessions.js');
    expect(getSessionsByAgentGroup('ag-1')).toHaveLength(1);
    expect(getSessionsByAgentGroup('ag-2')).toHaveLength(1);
  });

  it('accumulates without waking when engage fails + ignored_message_policy=accumulate', async () => {
    const { routeInbound } = await import('./router.js');
    const { wakeContainer } = await import('./container-runner.js');
    (wakeContainer as unknown as ReturnType<typeof vi.fn>).mockClear();

    // Replace the seed row with a mention-only wiring whose accumulate
    // policy should store context even when the message doesn't mention us.
    const { updateMessagingGroupAgent } = await import('./db/messaging-groups.js');
    updateMessagingGroupAgent('mga-1', {
      engage_mode: 'mention',
      ignored_message_policy: 'accumulate',
    });

    await routeInbound({
      channelType: 'discord',
      platformId: 'chan-123',
      threadId: null,
      message: {
        id: 'msg-nomatch',
        kind: 'chat',
        content: JSON.stringify({ text: 'no mention here' }),
        timestamp: now(),
      },
    });

    expect(wakeContainer).not.toHaveBeenCalled();

    const session = findSession('mg-1', null);
    expect(session).toBeDefined();
    const db = new Database(inboundDbPath('ag-1', session!.id));
    const rows = db.prepare('SELECT id, trigger FROM messages_in').all() as Array<{
      id: string;
      trigger: number;
    }>;
    db.close();
    expect(rows).toHaveLength(1);
    expect(rows[0].trigger).toBe(0);
  });

  it('drops silently when engage fails + ignored_message_policy=drop', async () => {
    const { routeInbound } = await import('./router.js');
    const { wakeContainer } = await import('./container-runner.js');
    (wakeContainer as unknown as ReturnType<typeof vi.fn>).mockClear();

    const { updateMessagingGroupAgent } = await import('./db/messaging-groups.js');
    updateMessagingGroupAgent('mga-1', { engage_mode: 'mention' }); // drop is the default

    await routeInbound({
      channelType: 'discord',
      platformId: 'chan-123',
      threadId: null,
      message: { id: 'msg-drop', kind: 'chat', content: JSON.stringify({ text: 'ignored' }), timestamp: now() },
    });

    expect(wakeContainer).not.toHaveBeenCalled();
    // No session should have been created for this agent.
    expect(findSession('mg-1', null)).toBeUndefined();
  });
});

describe('routing metadata preservation', () => {
  beforeEach(() => {
    createAgentGroup({
      id: 'ag-1',
      name: 'Test Agent',
      folder: 'test-agent',
      agent_provider: null,
      created_at: now(),
    });
    createMessagingGroup({
      id: 'mg-1',
      channel_type: 'discord',
      platform_id: 'chan-123',
      name: 'General',
      is_group: 1,
      unknown_sender_policy: 'public',
      created_at: now(),
    });
    createMessagingGroupAgent({
      id: 'mga-1',
      messaging_group_id: 'mg-1',
      agent_group_id: 'ag-1',
      engage_mode: 'pattern',
      engage_pattern: '.',
      sender_scope: 'all',
      ignored_message_policy: 'drop',
      session_mode: 'shared',
      priority: 0,
      created_at: now(),
    });
  });

  it('routed message carries platformId, channelType, threadId on the messages_in row', async () => {
    const { routeInbound } = await import('./router.js');

    await routeInbound({
      channelType: 'discord',
      platformId: 'chan-123',
      threadId: 'thread-42',
      message: { id: 'msg-r1', kind: 'chat', content: JSON.stringify({ sender: 'A', text: 'hi' }), timestamp: now() },
    });

    const session = findSession('mg-1', null);
    const db = new Database(inboundDbPath('ag-1', session!.id));
    const row = db.prepare('SELECT platform_id, channel_type, thread_id FROM messages_in WHERE id LIKE ?').get('msg-r1%') as {
      platform_id: string | null;
      channel_type: string | null;
      thread_id: string | null;
    };
    db.close();

    expect(row.platform_id).toBe('chan-123');
    expect(row.channel_type).toBe('discord');
    expect(row.thread_id).toBe('thread-42');
  });

  it('fan-out gives each agent its own routing, not leaked from sibling', async () => {
    const { routeInbound } = await import('./router.js');

    createAgentGroup({
      id: 'ag-2',
      name: 'Agent Two',
      folder: 'agent-two',
      agent_provider: null,
      created_at: now(),
    });
    createMessagingGroupAgent({
      id: 'mga-2',
      messaging_group_id: 'mg-1',
      agent_group_id: 'ag-2',
      engage_mode: 'pattern',
      engage_pattern: '.',
      sender_scope: 'all',
      ignored_message_policy: 'drop',
      session_mode: 'shared',
      priority: 0,
      created_at: now(),
    });

    await routeInbound({
      channelType: 'discord',
      platformId: 'chan-123',
      threadId: 'thread-fanout',
      message: { id: 'msg-fo', kind: 'chat', content: JSON.stringify({ text: 'fan' }), timestamp: now() },
    });

    // Both agents should have the message with correct routing
    const { getSessionsByAgentGroup } = await import('./db/sessions.js');
    for (const agId of ['ag-1', 'ag-2']) {
      const sessions = getSessionsByAgentGroup(agId);
      expect(sessions).toHaveLength(1);
      const db = new Database(inboundDbPath(agId, sessions[0].id));
      const row = db.prepare('SELECT platform_id, channel_type, thread_id FROM messages_in LIMIT 1').get() as {
        platform_id: string | null;
        channel_type: string | null;
        thread_id: string | null;
      };
      db.close();
      expect(row.platform_id).toBe('chan-123');
      expect(row.channel_type).toBe('discord');
      expect(row.thread_id).toBe('thread-fanout');
    }
  });
});

describe('writeSessionRouting', () => {
  it('populates session_routing from the messaging group', () => {
    createAgentGroup({
      id: 'ag-1',
      name: 'Agent',
      folder: 'agent',
      agent_provider: null,
      created_at: now(),
    });
    createMessagingGroup({
      id: 'mg-1',
      channel_type: 'telegram',
      platform_id: 'tg:12345',
      name: 'Chat',
      is_group: 0,
      unknown_sender_policy: 'public',
      created_at: now(),
    });

    const { session } = resolveSession('ag-1', 'mg-1', null, 'shared');
    writeSessionRouting('ag-1', session.id);

    const db = new Database(inboundDbPath('ag-1', session.id));
    const row = db.prepare('SELECT channel_type, platform_id, thread_id FROM session_routing WHERE id = 1').get() as {
      channel_type: string | null;
      platform_id: string | null;
      thread_id: string | null;
    } | undefined;
    db.close();

    expect(row).toBeDefined();
    expect(row!.channel_type).toBe('telegram');
    expect(row!.platform_id).toBe('tg:12345');
    expect(row!.thread_id).toBeNull();
  });

  it('writes null routing for agent-shared session (no messaging group)', () => {
    createAgentGroup({
      id: 'ag-1',
      name: 'Agent',
      folder: 'agent',
      agent_provider: null,
      created_at: now(),
    });

    const { session } = resolveSession('ag-1', null, null, 'agent-shared');
    writeSessionRouting('ag-1', session.id);

    const db = new Database(inboundDbPath('ag-1', session.id));
    const row = db.prepare('SELECT channel_type, platform_id, thread_id FROM session_routing WHERE id = 1').get() as {
      channel_type: string | null;
      platform_id: string | null;
      thread_id: string | null;
    } | undefined;
    db.close();

    expect(row).toBeDefined();
    expect(row!.channel_type).toBeNull();
    expect(row!.platform_id).toBeNull();
    expect(row!.thread_id).toBeNull();
  });

  it('includes thread_id from per-thread session', () => {
    createAgentGroup({
      id: 'ag-1',
      name: 'Agent',
      folder: 'agent',
      agent_provider: null,
      created_at: now(),
    });
    createMessagingGroup({
      id: 'mg-1',
      channel_type: 'discord',
      platform_id: 'chan-123',
      name: 'General',
      is_group: 1,
      unknown_sender_policy: 'public',
      created_at: now(),
    });

    const { session } = resolveSession('ag-1', 'mg-1', 'thread-77', 'per-thread');
    writeSessionRouting('ag-1', session.id);

    const db = new Database(inboundDbPath('ag-1', session.id));
    const row = db.prepare('SELECT channel_type, platform_id, thread_id FROM session_routing WHERE id = 1').get() as {
      channel_type: string | null;
      platform_id: string | null;
      thread_id: string | null;
    } | undefined;
    db.close();

    expect(row).toBeDefined();
    expect(row!.channel_type).toBe('discord');
    expect(row!.platform_id).toBe('chan-123');
    expect(row!.thread_id).toBe('thread-77');
  });
});

describe('agent-shared session resolution', () => {
  it('resolves to the same session on repeated calls', () => {
    createAgentGroup({
      id: 'ag-1',
      name: 'Agent',
      folder: 'agent',
      agent_provider: null,
      created_at: now(),
    });

    const { session: s1, created: c1 } = resolveSession('ag-1', null, null, 'agent-shared');
    const { session: s2, created: c2 } = resolveSession('ag-1', null, null, 'agent-shared');

    expect(c1).toBe(true);
    expect(c2).toBe(false);
    expect(s1.id).toBe(s2.id);
  });

  it('agent-shared session has null messaging_group_id', () => {
    createAgentGroup({
      id: 'ag-1',
      name: 'Agent',
      folder: 'agent',
      agent_provider: null,
      created_at: now(),
    });

    const { session } = resolveSession('ag-1', null, null, 'agent-shared');
    expect(session.messaging_group_id).toBeNull();
  });

  // BUG (#2332): agent-shared resolveSession reuses an existing channel-bound
  // session via findSessionByAgentGroup instead of creating a dedicated
  // agent-shared session. The two cannot coexist today — the agent-shared
  // call finds the channel session and returns it. This test documents the
  // current (broken) behavior; fixing #2332 should make it pass as written.
  it.skip('agent-shared and channel-bound sessions coexist for the same agent group', () => {
    createAgentGroup({
      id: 'ag-1',
      name: 'Agent',
      folder: 'agent',
      agent_provider: null,
      created_at: now(),
    });
    createMessagingGroup({
      id: 'mg-1',
      channel_type: 'discord',
      platform_id: 'chan-123',
      name: 'General',
      is_group: 1,
      unknown_sender_policy: 'public',
      created_at: now(),
    });

    const { session: shared } = resolveSession('ag-1', 'mg-1', null, 'shared');
    const { session: agentShared } = resolveSession('ag-1', null, null, 'agent-shared');

    expect(shared.id).not.toBe(agentShared.id);
    expect(shared.messaging_group_id).toBe('mg-1');
    expect(agentShared.messaging_group_id).toBeNull();
  });

  it('findSessionByAgentGroup returns existing channel-bound session (bug #2332)', () => {
    // Documents the current behavior: findSessionByAgentGroup doesn't
    // distinguish agent-shared from channel-bound. When a channel session
    // exists, agent-shared resolution reuses it instead of creating a
    // separate session. This is the root cause of A2A misrouting.
    createAgentGroup({
      id: 'ag-1',
      name: 'Agent',
      folder: 'agent',
      agent_provider: null,
      created_at: now(),
    });
    createMessagingGroup({
      id: 'mg-1',
      channel_type: 'discord',
      platform_id: 'chan-123',
      name: 'General',
      is_group: 1,
      unknown_sender_policy: 'public',
      created_at: now(),
    });

    const { session: channelSession } = resolveSession('ag-1', 'mg-1', null, 'shared');
    const found = findSessionByAgentGroup('ag-1');

    // Bug: picks the channel session — an agent-shared call would get this
    // instead of a dedicated session.
    expect(found).toBeDefined();
    expect(found!.id).toBe(channelSession.id);
    expect(found!.messaging_group_id).toBe('mg-1'); // should be null for agent-shared
  });
});

describe('delivery', () => {
  it('should detect undelivered messages in outbound DB', () => {
    createAgentGroup({
      id: 'ag-1',
      name: 'Agent',
      folder: 'agent',
      agent_provider: null,
      created_at: now(),
    });
    createMessagingGroup({
      id: 'mg-test',
      channel_type: 'discord',
      platform_id: 'chan-test',
      name: 'Test',
      is_group: 0,
      unknown_sender_policy: 'strict',
      created_at: now(),
    });

    const { session } = resolveSession('ag-1', 'mg-test', null, 'shared');

    // Write a response to the outbound DB (simulating what the agent-runner does)
    const dbPath = outboundDbPath('ag-1', session.id);
    const db = new Database(dbPath);
    db.prepare(
      `INSERT INTO messages_out (id, timestamp, kind, platform_id, channel_type, content)
       VALUES ('out-1', datetime('now'), 'chat', 'chan-123', 'discord', ?)`,
    ).run(JSON.stringify({ text: 'Agent response' }));

    const undelivered = db.prepare('SELECT * FROM messages_out').all() as Array<{
      id: string;
      content: string;
    }>;
    db.close();

    expect(undelivered).toHaveLength(1);
    expect(JSON.parse(undelivered[0].content).text).toBe('Agent response');
  });
});