import assert from 'node:assert/strict';
import { test } from 'node:test';
import {
  applyChatAccess, chatCursor, chatEndpoint, collaborationKey, createChatApi, matchesChatSearch,
  mergeChatMessages, validChatImage, visibleChatRooms,
} from '../src/lib/chat.ts';

const id = '11111111-1111-4111-8111-111111111111';
const internal = { key: 'allgemein', name: 'Allgemein', source: 'internal', exists: true };
const remote = { key: collaborationKey(id), id, name: 'Partner', source: 'collaboration', exists: true };
function fixture(overrides = {}) {
  const responses = {
    '/api/communication/chat/rooms': { rooms: [internal] },
    '/api/communication/chat/project-rooms': { rooms: [{ key: 'project_42', name: 'Projekt', exists: true }] },
    '/api/communication/chat/direct-rooms': { rooms: [] },
    '/api/communication/chat/unread': { rooms: { allgemein: { count: 7 }, project_42: { count: 2 } } },
    '/api/communication/chat/room-preferences': { hiddenRoomKeys: ['allgemein', collaborationKey(id)] },
    '/api/collaboration': { rooms: [{ id, name: 'Partner', remote: true, unread: 11 }], invitations: [{ id: 'invite', name: 'Team' }],
      managedRooms: [{ id: 'not-a-member', name: 'Verwalteter Raum ohne Teilnahme' }], canManage: true, projects: [{ id: 42, name: 'Projekt' }] },
    ...overrides,
  };
  const calls = [];
  return { calls, api: createChatApi(async (path, options) => {
    calls.push({ path, ...options });
    if (!(path in responses)) throw new Error(`Unexpected request: ${path}`);
    if (responses[path] instanceof Error) throw responses[path];
    return structuredClone(responses[path]);
  }) };
}

test('Web-Sichtbarkeit gilt auch für föderierte Räume und den Ungelesen-Zähler', async () => {
  const { api, calls } = fixture();
  const directory = await api.directory('tenant-token');
  assert.deepEqual(visibleChatRooms(directory).map(room => room.key), ['project_42']);
  assert.equal(directory.rooms.length, 3); // No implicit access via managedRooms.
  assert.equal(directory.rooms[2].source, 'collaboration');
  assert.equal(directory.rooms[2].remote, true);
  assert.equal(directory.invitations[0].id, 'invite');
  assert.equal(await api.unread('tenant-token'), 2);
  assert.ok(calls.every(call => call.token === 'tenant-token'));
});
test('Fehlende Sichtbarkeitseinstellungen zeigen keine ungefilterte Chatliste', async () => {
  const { api } = fixture({ '/api/communication/chat/room-preferences': new Error('offline') });
  await assert.rejects(api.directory('token'), /offline/);
  await assert.rejects(api.unread('token'), /offline/);
});
test('Föderierte Endpunkte, Cursor und Lesebestätigungen verwenden Raum-ID und Sequenz', async () => {
  const calls = [];
  const api = createChatApi(async (path, options) => { calls.push({ path, ...options }); return { messages: [] }; });
  await api.messages('t', remote, { after: 50 });
  await api.messages('t', remote, { before: 20 });
  await api.read('t', remote, 60);
  await api.messages('t', internal, { after: 12 });
  await api.read('t', internal, 14);
  assert.equal(calls[0].path, `/api/collaboration/rooms/${id}/messages?after=50`);
  assert.equal(calls[1].path, `/api/collaboration/rooms/${id}/messages?before=20`);
  assert.deepEqual(calls[2].body, { seq: 60 });
  assert.equal(calls[3].path, '/api/communication/chat/rooms/allgemein/sync?afterId=12');
  assert.deepEqual(calls[4].body, { messageId: 14 });
  assert.equal(chatCursor(remote, [{ id: 'pending', seq: null }, { id: 'uuid', seq: 7 }]), 7);
});
test('Bestätigungen ersetzen wartende Nachrichten ohne doppelte oder verspätete Kopien', () => {
  const pending = { id: 'client-1', clientId: 'client-1', own: true, pending: true, seq: null };
  const delivered = { id: 'server-1', clientId: 'client-1', own: true, seq: 9 };
  const first = mergeChatMessages([pending], [delivered], true);
  assert.deepEqual(first, [delivered]);
  assert.deepEqual(mergeChatMessages(first, [pending], true), [delivered]);
  assert.deepEqual(mergeChatMessages([], [delivered, pending], true), [delivered]);
  assert.deepEqual(mergeChatMessages([{ id: 2 }], [{ id: 1 }, { id: 2, body: 'aktualisiert' }], false), [{ id: 1 }, { id: 2, body: 'aktualisiert' }]);
});
test('Geänderte Teilnahmerechte entfernen frühere Historie und alte ausstehende Nachrichten', () => {
  const messages = [{ id: 'old', seq: 1 }, { id: 'new', seq: 8 }, { id: 'pending', seq: null }];
  assert.deepEqual(applyChatAccess(messages, { historyFromSeq: 5, revision: 2 }, { revision: 1 }), [{ id: 'new', seq: 8 }]);
  assert.equal(applyChatAccess(messages, { historyFromSeq: 5, revision: 1 }, { revision: 1 }).length, 2);
});
test('Senden behält die Idempotenz-ID und überträgt Bilder an die passende Schnittstelle', async () => {
  const calls = [];
  const api = createChatApi(async (path, options) => { calls.push({ path, ...options }); return {}; });
  const image = { name: 'Foto.jpg', dataUrl: 'data:image/jpeg;base64,YQ==' };
  await api.send('t', remote, '', image, 'same-client-id');
  await api.send('t', remote, '', image, 'same-client-id');
  await api.send('t', internal, 'Hallo', null, 'unused');
  assert.deepEqual(calls[0], calls[1]);
  assert.deepEqual(calls[0].body, { text: '', image, clientId: 'same-client-id' });
  assert.deepEqual(calls[2].body, { text: 'Hallo' });
});
test('Einladungen und ausgeblendete Räume verwenden dieselben Schlüssel wie das Web', async () => {
  const calls = [];
  const api = createChatApi(async (path, options) => { calls.push({ path, ...options }); return {}; });
  await api.respond('t', id, true); await api.respond('t', id, false);
  await api.hide('t', remote.key, true); await api.hide('t', remote.key, false);
  assert.equal(calls[0].path, `/api/collaboration/invitations/${id}/accept`);
  assert.equal(calls[1].path, `/api/collaboration/invitations/${id}/decline`);
  assert.deepEqual(calls[2].body, { roomKey: collaborationKey(id), hidden: true });
  assert.equal(calls[3].body.hidden, false);
});
test('Reaktionen werden begrenzt geladen; wartende Nachrichten bleiben ausgeschlossen', async () => {
  const calls = [];
  const api = createChatApi(async (path, options) => { calls.push({ path, ...options }); return { reactions: {} }; });
  const messages = Array.from({ length: 205 }, (_, index) => ({ id: index + 1 }));
  messages.push({ id: 'pending', pending: true }, { id: 'failed', failed: true });
  await api.reactions('t', remote, messages);
  assert.equal(calls.length, 3);
  for (const call of calls) {
    const ids = new URL(call.path, 'https://example.invalid').searchParams.get('ids').split(',');
    assert.ok(ids.length <= 100); assert.ok(ids.every(value => /^\d+$/.test(value)));
  }
  await api.react('t', remote, id, '👍', false);
  assert.deepEqual(calls[3].body, { messageId: id, emoji: '👍', active: false });
});
test('Chatbilder akzeptieren keine externen URLs, SVGs oder übergroßen Inhalte', async () => {
  for (const value of ['https://tracker.invalid/image.png', 'data:image/svg+xml;base64,YQ==', `data:image/png;base64,${'a'.repeat(700_000)}`]) {
    assert.equal(validChatImage(value), false);
    const api = createChatApi(async () => ({ dataUrl: value }));
    await assert.rejects(api.image('t', remote, id), /Ungültiges Chatbild/);
  }
  assert.equal(validChatImage('data:image/webp;base64,YQ=='), true);
});
test('Suche berücksichtigt mehrere Begriffe, Umlaute und Partnernamen', () => {
  assert.equal(matchesChatSearch({ name: 'Büro Süd', ownerName: 'Straße GmbH' }, 'buro strasse'), true);
  assert.equal(matchesChatSearch({ name: 'Büro Süd', ownerName: 'Straße GmbH' }, 'buro nord'), false);
});
test('Noch nicht angelegte Direkt- und Projektchats werden gezielt provisioniert', async () => {
  const calls = [];
  const api = createChatApi(async (path, options) => { calls.push({ path, ...options }); return { exists: true }; });
  await api.provision('t', { ...internal, exists: false, type: 'project', projectId: 42 });
  await api.provision('t', { ...internal, exists: false, type: 'direct', userId: 'user/id' });
  await api.provision('t', remote);
  assert.equal(calls.length, 2);
  assert.equal(calls[0].path, '/api/communication/chat/project-rooms/42/provision');
  assert.equal(calls[1].path, '/api/communication/chat/direct-rooms/user%2Fid/provision');
  assert.equal(chatEndpoint(remote), `/api/collaboration/rooms/${id}`);
});