import crypto from 'node:crypto';
import fs from 'node:fs';
import path from 'node:path';
import { fileURLToPath } from 'node:url';
import { promisify, TextEncoder } from 'node:util';
import { DatabaseSync } from 'node:sqlite';
import cors from '@fastify/cors';
import jwt from '@fastify/jwt';
import fastifyStatic from '@fastify/static';
import websocket from '@fastify/websocket';
import dotenv from 'dotenv';
import libreOffice from 'libreoffice-convert';
import { generateAuthenticationOptions, generateRegistrationOptions, verifyAuthenticationResponse, verifyRegistrationResponse, } from '@simplewebauthn/server';
import Fastify from 'fastify';
import { Redis } from 'ioredis';
import { z } from 'zod';
import { SpeechTranscriber } from './speech-transcriber.js';
dotenv.config({ path: fileURLToPath(new URL('../../.env', import.meta.url)) });
const projectRootPath = fileURLToPath(new URL('../../', import.meta.url));
const registerSchema = z.object({
    username: z.string().trim().min(3).max(32).regex(/^[a-zA-Z0-9_-]+$/),
    displayName: z.string().trim().min(2).max(48).optional(),
    password: z.string().min(8).max(128),
});
const loginSchema = z.object({
    username: z.string().trim().min(3).max(32),
    password: z.string().min(8).max(128),
});
const accessKeyLabelSchema = z.object({
    label: z.string().trim().min(1).max(64).optional(),
});
const verifyAccessKeySchema = z.object({
    credential: z.custom(),
});
const accessKeyAuthenticationSchema = z.object({
    username: z.string().trim().min(3).max(32).optional(),
});
const verifyAccessKeyAuthenticationSchema = z.object({
    attemptId: z.string().min(1),
    credential: z.custom(),
});
const approvePendingUserParamsSchema = z.object({
    userId: z.string().min(1),
});
const adminDeleteUserParamsSchema = z.object({
    userId: z.string().min(1),
});
const webBundleFileParamsSchema = z.object({
    '*': z.string().min(1),
});
const officePreviewSchema = z.object({
    fileName: z.string().trim().min(1).max(256),
    mimeType: z.string().trim().min(1).max(256),
    fileBase64: z.string().min(1).max(96_000_000),
});
const wsQuerySchema = z.object({
    token: z.string().min(1),
});
const signalMessageSchema = z.discriminatedUnion('type', [
    z.object({
        type: z.literal('signal'),
        to: z.string().min(1),
        signal: z.discriminatedUnion('type', [
            z.object({
                type: z.literal('sdp'),
                description: z.object({
                    type: z.enum(['offer', 'answer', 'pranswer', 'rollback']),
                    sdp: z.string().optional(),
                }),
            }),
            z.object({
                type: z.literal('ice-candidate'),
                candidate: z.object({
                    candidate: z.string().optional(),
                    sdpMid: z.string().nullable().optional(),
                    sdpMLineIndex: z.number().nullable().optional(),
                    usernameFragment: z.string().nullable().optional(),
                }),
            }),
        ]),
    }),
    z.object({
        type: z.literal('image-generation'),
        requestId: z.string().uuid(),
        peerId: z.string().min(1),
        prompt: z.string().trim().min(1).max(4000),
    }),
    z.object({
        type: z.literal('ping'),
    }),
    z.object({
        type: z.literal('speech-transcription'),
        requestId: z.string().uuid(),
        mimeType: z.string().trim().min(1).max(128),
        audioBase64: z.string().min(1).max(32_000_000),
    }),
]);
const app = Fastify({ logger: true, trustProxy: true });
const approvalAdminUsername = 'ladparis';
const dataDirectory = resolveStoragePath(process.env.PRIVATECHAT_DATA_DIR ?? 'server/data');
const sqlitePath = resolveStoragePath(process.env.SQLITE_PATH ?? path.join(dataDirectory, 'privatechat.sqlite'));
const masterKeyPath = resolveStoragePath(process.env.PRIVATECHAT_MASTER_KEY_PATH ?? path.join(dataDirectory, 'master.key'));
const frontendDistPath = resolveProjectPath(process.env.PRIVATECHAT_WEB_DIST_DIR ?? 'client/dist/client/browser');
const ollamaServerUrl = (process.env.PRIVATECHAT_OLLAMA_URL ?? 'http://192.168.1.19:11434').replace(/\/+$/, '');
const ollamaImageModel = process.env.PRIVATECHAT_OLLAMA_IMAGE_MODEL ?? 'x/z-image-turbo:latest';
const ollamaImageSize = process.env.PRIVATECHAT_OLLAMA_IMAGE_SIZE ?? '1024x1024';
const speechTranscriptionServiceUrl = process.env.PRIVATECHAT_TRANSCRIPTION_WS_URL ?? 'ws://192.168.1.19:8080';
const speechTranscriptionLanguage = process.env.PRIVATECHAT_TRANSCRIPTION_LANGUAGE ?? 'auto';
const speechTranscriptionTimeoutMs = Number(process.env.PRIVATECHAT_TRANSCRIPTION_TIMEOUT_MS ?? 120_000);
const sessionTtlSeconds = Number(process.env.SESSION_TTL_SECONDS ?? 60 * 60 * 12);
const webAuthnChallengeTtlSeconds = Number(process.env.WEBAUTHN_CHALLENGE_TTL_SECONDS ?? 5 * 60);
const allowedCorsOrigins = parseAllowedOrigins(process.env.CORS_ORIGIN);
const corsAllowedHeaders = ['Authorization', 'Content-Type'];
const corsMethods = ['GET', 'POST', 'OPTIONS'];
const webAuthnOrigin = process.env.WEBAUTHN_ORIGIN ?? 'http://localhost:4200';
const webAuthnRpName = process.env.WEBAUTHN_RP_NAME ?? 'PrivateChat';
const webAuthnUserVerification = resolveWebAuthnUserVerification(process.env.WEBAUTHN_USER_VERIFICATION);
const frontendIndexPath = path.join(frontendDistPath, 'index.html');
const hasFrontendBuild = fs.existsSync(frontendIndexPath);
const convertOfficeDocument = promisify(libreOffice.convertWithOptions);
const speechTranscriber = new SpeechTranscriber({
    serviceUrl: speechTranscriptionServiceUrl,
    language: speechTranscriptionLanguage,
    requestTimeoutMs: speechTranscriptionTimeoutMs,
}, app.log);
fs.mkdirSync(path.dirname(sqlitePath), { recursive: true });
fs.mkdirSync(path.dirname(masterKeyPath), { recursive: true });
const encryptionKey = deriveEncryptionKey(loadOrCreateMasterKey(masterKeyPath));
const database = new DatabaseSync(sqlitePath);
database.exec(`
  PRAGMA journal_mode = WAL;

  CREATE TABLE IF NOT EXISTS users (
    id TEXT PRIMARY KEY,
    username TEXT NOT NULL UNIQUE,
    display_name TEXT NOT NULL,
    encrypted_credentials TEXT NOT NULL,
    is_active INTEGER NOT NULL DEFAULT 1,
    approved_at TEXT,
    created_at TEXT NOT NULL
  );

  CREATE TABLE IF NOT EXISTS app_secrets (
    name TEXT PRIMARY KEY,
    encrypted_value TEXT NOT NULL,
    created_at TEXT NOT NULL
  );

  CREATE TABLE IF NOT EXISTS webauthn_credentials (
    id TEXT PRIMARY KEY,
    user_id TEXT NOT NULL,
    credential_id TEXT NOT NULL UNIQUE,
    label TEXT NOT NULL,
    encrypted_registration TEXT NOT NULL,
    created_at TEXT NOT NULL,
    FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE
  );
`);
ensureUserApprovalColumns();
const createUserStatement = database.prepare(`
  INSERT INTO users (id, username, display_name, encrypted_credentials, is_active, approved_at, created_at)
  VALUES (?, ?, ?, ?, ?, ?, ?)
`);
const selectUserByUsernameStatement = database.prepare(`
  SELECT id, username, display_name, encrypted_credentials, is_active, created_at, approved_at
  FROM users
  WHERE username = ?
`);
const selectUserByIdStatement = database.prepare(`
  SELECT id, username, display_name, encrypted_credentials, is_active, created_at, approved_at
  FROM users
  WHERE id = ?
`);
const selectPendingUsersStatement = database.prepare(`
  SELECT id, username, display_name, encrypted_credentials, is_active, created_at, approved_at
  FROM users
  WHERE is_active = 0
  ORDER BY created_at ASC
`);
const selectAllUsersStatement = database.prepare(`
  SELECT id, username, display_name, encrypted_credentials, is_active, created_at, approved_at
  FROM users
  ORDER BY created_at DESC
`);
const approveUserStatement = database.prepare(`
  UPDATE users
  SET is_active = 1, approved_at = ?
  WHERE id = ? AND is_active = 0
`);
const updateUserCredentialsStatement = database.prepare(`
  UPDATE users
  SET encrypted_credentials = ?
  WHERE id = ?
`);
const insertSecretStatement = database.prepare(`
  INSERT INTO app_secrets (name, encrypted_value, created_at)
  VALUES (?, ?, ?)
`);
const selectSecretStatement = database.prepare(`
  SELECT encrypted_value
  FROM app_secrets
  WHERE name = ?
`);
const createAccessKeyStatement = database.prepare(`
  INSERT INTO webauthn_credentials (id, user_id, credential_id, label, encrypted_registration, created_at)
  VALUES (?, ?, ?, ?, ?, ?)
`);
const selectAccessKeysByUserStatement = database.prepare(`
  SELECT id, user_id, credential_id, label, encrypted_registration, created_at
  FROM webauthn_credentials
  WHERE user_id = ?
  ORDER BY created_at DESC
`);
const selectAccessKeyByCredentialIdStatement = database.prepare(`
  SELECT id, user_id, credential_id, label, encrypted_registration, created_at
  FROM webauthn_credentials
  WHERE credential_id = ?
`);
const deleteAccessKeysByUserStatement = database.prepare(`
  DELETE FROM webauthn_credentials
  WHERE user_id = ?
`);
const updateAccessKeyStatement = database.prepare(`
  UPDATE webauthn_credentials
  SET encrypted_registration = ?
  WHERE credential_id = ?
`);
const deleteUserStatement = database.prepare(`
  DELETE FROM users
  WHERE id = ?
`);
const jwtSecret = loadOrCreateSecret('jwt-secret', () => crypto.randomBytes(64).toString('hex'));
const redis = new Redis(process.env.REDIS_URL ?? 'redis://127.0.0.1:6379/0');
const socketsByUserId = new Map();
await redis.ping();
await app.register(cors, {
    origin(origin, callback) {
        callback(null, isAllowedRequestOrigin(origin));
    },
    credentials: false,
    allowedHeaders: corsAllowedHeaders,
    methods: corsMethods,
});
await app.register(jwt, {
    secret: jwtSecret,
});
await app.register(websocket);
if (hasFrontendBuild) {
    await app.register(fastifyStatic, {
        root: frontendDistPath,
        prefix: '/',
    });
    app.setNotFoundHandler((request, reply) => {
        const requestPath = request.raw.url?.split('?')[0] ?? '/';
        if (request.method !== 'GET' ||
            requestPath === '/ws' ||
            requestPath === '/api' ||
            requestPath.startsWith('/api/')) {
            return reply.code(404).send({ message: 'Not found.' });
        }
        return reply.type('text/html; charset=utf-8').send(fs.createReadStream(frontendIndexPath));
    });
}
else {
    app.log.warn({ frontendDistPath }, 'Angular frontend build not found. Build the client before serving it from the backend.');
}
app.get('/api/health', async () => ({ ok: true }));
app.get('/api/web-app/manifest', async (request, reply) => {
    const manifest = getFrontendBundleManifest();
    if (!manifest) {
        return reply.code(404).send({
            message: 'Angular frontend build not found.',
            frontendDistPath,
        });
    }
    const etag = `"${manifest.bundleId}"`;
    reply.header('Cache-Control', 'no-cache');
    reply.header('ETag', etag);
    if (requestMatchesEtag(request.headers['if-none-match'], etag)) {
        return reply.code(304).send();
    }
    return manifest;
});
app.get('/api/web-app/files/*', async (request, reply) => {
    const parsed = webBundleFileParamsSchema.safeParse(request.params);
    if (!parsed.success) {
        return reply.code(400).send({
            message: 'Invalid web bundle asset path.',
            issues: parsed.error.flatten(),
        });
    }
    const asset = resolveFrontendBundleAsset(parsed.data['*']);
    if (!asset) {
        return reply.code(404).send({ message: 'Frontend asset not found.' });
    }
    const etag = `W/"${asset.etag}"`;
    reply.header('Cache-Control', 'public, max-age=300');
    reply.header('ETag', etag);
    reply.header('Last-Modified', new Date(asset.lastModifiedMs).toUTCString());
    if (requestMatchesEtag(request.headers['if-none-match'], etag)) {
        return reply.code(304).send();
    }
    reply.header('Content-Length', String(asset.size));
    reply.type(asset.contentType);
    return reply.send(fs.createReadStream(asset.absolutePath));
});
app.post('/api/auth/register', async (request, reply) => {
    const parsed = registerSchema.safeParse(request.body);
    if (!parsed.success) {
        return reply.code(400).send({
            message: 'Invalid registration payload.',
            issues: parsed.error.flatten(),
        });
    }
    const username = parsed.data.username.toLowerCase();
    if (findUserByUsername(username)) {
        return reply.code(409).send({ message: 'Username is already taken.' });
    }
    const user = createUser({
        username,
        displayName: parsed.data.displayName?.trim() || parsed.data.username,
        password: parsed.data.password,
        isActive: username === approvalAdminUsername,
    });
    if (!user.isActive) {
        return reply.code(202).send({
            pendingApproval: true,
            message: `Account created. It must be approved by ${approvalAdminUsername} before you can sign in.`,
        });
    }
    const session = await createSession(user.id);
    return createAuthReply(user, session.sessionId);
});
app.post('/api/auth/login', async (request, reply) => {
    const parsed = loginSchema.safeParse(request.body);
    if (!parsed.success) {
        return reply.code(400).send({
            message: 'Invalid login payload.',
            issues: parsed.error.flatten(),
        });
    }
    const user = findUserByUsername(parsed.data.username.toLowerCase());
    if (!user || !verifyPassword(parsed.data.password, user.passwordHash)) {
        return reply.code(401).send({ message: 'Invalid credentials.' });
    }
    if (!user.isActive) {
        return reply.code(403).send({
            message: `Your account is awaiting approval from ${approvalAdminUsername}.`,
        });
    }
    const session = await createSession(user.id);
    return createAuthReply(user, session.sessionId);
});
app.post('/api/webauthn/authenticate/options', async (request, reply) => {
    const parsed = accessKeyAuthenticationSchema.safeParse(request.body ?? {});
    if (!parsed.success) {
        return reply.code(400).send({
            message: 'Invalid access key sign-in payload.',
            issues: parsed.error.flatten(),
        });
    }
    const expectedOrigin = resolveWebAuthnOrigin(request);
    const expectedRpId = process.env.WEBAUTHN_RP_ID ?? new URL(expectedOrigin).hostname;
    const username = parsed.data.username?.trim().toLowerCase();
    const user = username ? findUserByUsername(username) : null;
    if (username && !user) {
        return reply.code(400).send({ message: 'No access key is registered for that username.' });
    }
    if (user && !user.isActive) {
        return reply.code(403).send({
            message: `Your account is awaiting approval from ${approvalAdminUsername}.`,
        });
    }
    const storedCredentials = user ? listStoredAccessKeys(user.id) : [];
    if (username && storedCredentials.length === 0) {
        return reply.code(400).send({ message: 'No access key is registered for that username.' });
    }
    const attemptId = crypto.randomUUID();
    const options = await generateAuthenticationOptions({
        rpID: expectedRpId,
        userVerification: webAuthnUserVerification,
        allowCredentials: storedCredentials.length > 0
            ? storedCredentials.map((credential) => ({
                id: credential.credentialId,
                transports: credential.transports,
            }))
            : undefined,
    });
    await redis.set(webAuthnAuthenticationKey(attemptId), JSON.stringify({
        challenge: options.challenge,
        expectedOrigin,
        expectedRpId,
        expectedUserId: user?.id ?? null,
    }), 'EX', webAuthnChallengeTtlSeconds);
    return {
        attemptId,
        expectedOrigin,
        ...options,
    };
});
app.post('/api/webauthn/authenticate/verify', async (request, reply) => {
    const parsed = verifyAccessKeyAuthenticationSchema.safeParse(request.body);
    if (!parsed.success) {
        return reply.code(400).send({
            message: 'Invalid access key sign-in verification payload.',
            issues: parsed.error.flatten(),
        });
    }
    const pending = await getPendingAuthentication(parsed.data.attemptId);
    if (!pending) {
        return reply.code(400).send({ message: 'Access key sign-in challenge expired.' });
    }
    try {
        const storedAccessKey = findStoredAccessKeyByCredentialId(parsed.data.credential.id);
        if (!storedAccessKey) {
            return reply.code(401).send({ message: 'This access key is not registered.' });
        }
        if (!storedAccessKey.user.isActive) {
            return reply.code(403).send({
                message: `Your account is awaiting approval from ${approvalAdminUsername}.`,
            });
        }
        if (pending.expectedUserId && storedAccessKey.user.id !== pending.expectedUserId) {
            return reply.code(401).send({ message: 'This access key does not match the requested username.' });
        }
        const verification = await verifyAuthenticationResponse({
            response: parsed.data.credential,
            expectedChallenge: pending.challenge,
            expectedOrigin: pending.expectedOrigin,
            expectedRPID: pending.expectedRpId,
            credential: {
                id: storedAccessKey.registration.credentialId,
                publicKey: Buffer.from(storedAccessKey.registration.publicKey, 'base64url'),
                counter: storedAccessKey.registration.counter,
                transports: storedAccessKey.registration.transports,
            },
            requireUserVerification: webAuthnUserVerification === 'required',
        });
        if (!verification.verified) {
            return reply.code(401).send({ message: 'Access key sign-in could not be verified.' });
        }
        updateStoredAccessKey(storedAccessKey, {
            counter: verification.authenticationInfo.newCounter,
            deviceType: verification.authenticationInfo.credentialDeviceType,
            backedUp: verification.authenticationInfo.credentialBackedUp,
        });
        const session = await createSession(storedAccessKey.user.id);
        return createAuthReply(storedAccessKey.user, session.sessionId);
    }
    catch (error) {
        app.log.warn({ err: error }, 'WebAuthn authentication verification failed');
        return reply.code(400).send({
            message: error instanceof Error
                ? `Access key sign-in could not be verified: ${error.message}`
                : 'Access key sign-in could not be verified.',
        });
    }
    finally {
        await clearPendingAuthentication(parsed.data.attemptId);
    }
});
app.get('/api/auth/session', async (request, reply) => {
    const authContext = await authenticateRequest(request, reply);
    if (!authContext) {
        return;
    }
    return {
        user: toPublicUser(authContext.user),
        messageEncryptionKey: authContext.user.messageEncryptionKey,
    };
});
app.post('/api/files/office-preview', { bodyLimit: 64 * 1024 * 1024 }, async (request, reply) => {
    const authContext = await authenticateRequest(request, reply);
    if (!authContext) {
        return;
    }
    const parsed = officePreviewSchema.safeParse(request.body);
    if (!parsed.success) {
        return reply.code(400).send({
            message: 'Invalid office preview payload.',
            issues: parsed.error.flatten(),
        });
    }
    if (!isSupportedOfficeDocument(parsed.data.fileName, parsed.data.mimeType)) {
        return reply.code(400).send({ message: 'Only DOCX, XLSX, and PPTX files can be previewed.' });
    }
    try {
        const pdfBuffer = await convertOfficeDocumentToPdf(parsed.data.fileName, parsed.data.fileBase64);
        return {
            mimeType: 'application/pdf',
            pdfBase64: pdfBuffer.toString('base64'),
        };
    }
    catch (error) {
        app.log.warn({ err: error, userId: authContext.user.id }, 'Office preview generation failed');
        return reply.code(422).send({
            message: describeOfficePreviewFailure(error),
        });
    }
});
app.get('/api/admin/pending-users', async (request, reply) => {
    const authContext = await authenticateRequest(request, reply);
    if (!authContext) {
        return;
    }
    if (!isApprovalAdmin(authContext.user)) {
        return reply.code(403).send({ message: 'Only ladparis can approve accounts.' });
    }
    return {
        users: listPendingApprovalUsers(),
    };
});
app.post('/api/admin/pending-users/:userId/approve', async (request, reply) => {
    const authContext = await authenticateRequest(request, reply);
    if (!authContext) {
        return;
    }
    if (!isApprovalAdmin(authContext.user)) {
        return reply.code(403).send({ message: 'Only ladparis can approve accounts.' });
    }
    const parsed = approvePendingUserParamsSchema.safeParse(request.params);
    if (!parsed.success) {
        return reply.code(400).send({
            message: 'Invalid user approval request.',
            issues: parsed.error.flatten(),
        });
    }
    const approvedUser = approveUser(parsed.data.userId);
    if (!approvedUser) {
        return reply.code(404).send({ message: 'Pending user not found.' });
    }
    return {
        user: toPublicUser(approvedUser),
    };
});
app.get('/api/admin/users', async (request, reply) => {
    const authContext = await authenticateRequest(request, reply);
    if (!authContext) {
        return;
    }
    if (!isApprovalAdmin(authContext.user)) {
        return reply.code(403).send({ message: 'Only ladparis can delete users.' });
    }
    return {
        users: listAdminUsers(),
    };
});
app.delete('/api/admin/users/:userId', async (request, reply) => {
    const authContext = await authenticateRequest(request, reply);
    if (!authContext) {
        return;
    }
    if (!isApprovalAdmin(authContext.user)) {
        return reply.code(403).send({ message: 'Only ladparis can delete users.' });
    }
    const parsed = adminDeleteUserParamsSchema.safeParse(request.params);
    if (!parsed.success) {
        return reply.code(400).send({
            message: 'Invalid user deletion request.',
            issues: parsed.error.flatten(),
        });
    }
    const deletedUser = await deleteUserAccount(parsed.data.userId);
    if (!deletedUser) {
        return reply.code(404).send({ message: 'User not found.' });
    }
    return {
        user: toPublicUser(deletedUser),
    };
});
app.post('/api/auth/logout', async (request, reply) => {
    const authContext = await authenticateRequest(request, reply);
    if (!authContext) {
        return;
    }
    await destroySession(authContext.session.sessionId);
    await clearPendingRegistration(authContext.session.sessionId);
    closeSocketSession(authContext.user.id, authContext.session.sessionId);
    return { ok: true };
});
app.get('/api/webauthn/credentials', async (request, reply) => {
    const authContext = await authenticateRequest(request, reply);
    if (!authContext) {
        return;
    }
    return {
        credentials: listAccessKeys(authContext.user.id),
    };
});
app.post('/api/webauthn/register/options', async (request, reply) => {
    const authContext = await authenticateRequest(request, reply);
    if (!authContext) {
        return;
    }
    const parsed = accessKeyLabelSchema.safeParse(request.body ?? {});
    if (!parsed.success) {
        return reply.code(400).send({
            message: 'Invalid access key request payload.',
            issues: parsed.error.flatten(),
        });
    }
    const label = parsed.data.label?.trim() || defaultAccessKeyLabel();
    const storedCredentials = listStoredAccessKeys(authContext.user.id);
    const expectedOrigin = resolveWebAuthnOrigin(request);
    const expectedRpId = process.env.WEBAUTHN_RP_ID ?? new URL(expectedOrigin).hostname;
    const options = await generateRegistrationOptions({
        rpName: webAuthnRpName,
        rpID: expectedRpId,
        userName: authContext.user.username,
        userDisplayName: authContext.user.displayName,
        userID: new TextEncoder().encode(authContext.user.id),
        attestationType: 'none',
        authenticatorSelection: {
            residentKey: 'preferred',
            userVerification: webAuthnUserVerification,
        },
        excludeCredentials: storedCredentials.map((credential) => ({
            id: credential.credentialId,
            transports: credential.transports,
        })),
    });
    await redis.set(webAuthnRegistrationKey(authContext.session.sessionId), JSON.stringify({
        challenge: options.challenge,
        label,
        expectedOrigin,
        expectedRpId,
    }), 'EX', webAuthnChallengeTtlSeconds);
    return {
        expectedOrigin,
        ...options,
    };
});
app.post('/api/webauthn/register/verify', async (request, reply) => {
    const authContext = await authenticateRequest(request, reply);
    if (!authContext) {
        return;
    }
    const parsed = verifyAccessKeySchema.safeParse(request.body);
    if (!parsed.success) {
        return reply.code(400).send({
            message: 'Invalid access key verification payload.',
            issues: parsed.error.flatten(),
        });
    }
    const pending = await getPendingRegistration(authContext.session.sessionId);
    if (!pending) {
        return reply.code(400).send({ message: 'Access key registration challenge expired.' });
    }
    try {
        const verification = await verifyRegistrationResponse({
            response: parsed.data.credential,
            expectedChallenge: pending.challenge,
            expectedOrigin: pending.expectedOrigin,
            expectedRPID: pending.expectedRpId,
            requireUserVerification: webAuthnUserVerification === 'required',
        });
        if (!verification.verified || !verification.registrationInfo) {
            return reply.code(400).send({ message: 'Access key registration could not be verified.' });
        }
        const registrationInfo = verification.registrationInfo;
        persistAccessKey(authContext.user.id, {
            credentialId: registrationInfo.credential.id,
            label: pending.label,
            publicKey: bytesToBase64Url(registrationInfo.credential.publicKey),
            counter: registrationInfo.credential.counter,
            transports: registrationInfo.credential.transports ?? [],
            deviceType: registrationInfo.credentialDeviceType,
            backedUp: registrationInfo.credentialBackedUp,
            aaguid: registrationInfo.aaguid,
        });
        await clearPendingRegistration(authContext.session.sessionId);
        return {
            credential: listAccessKeys(authContext.user.id)[0],
        };
    }
    catch (error) {
        app.log.warn({ err: error }, 'WebAuthn registration verification failed');
        return reply.code(400).send({
            message: error instanceof Error
                ? `Access key registration could not be verified: ${error.message}`
                : 'Access key registration could not be verified.',
        });
    }
});
app.get('/ws', { websocket: true }, (socket, request) => {
    void openSocket(socket, request);
});
const port = Number(process.env.PORT ?? 16990);
await app.listen({ port, host: '0.0.0.0' });
app.log.info(`PrivateChat signaling server listening on http://localhost:${port}`);
async function openSocket(socket, request) {
    if (!isAllowedRequestOrigin(request.headers.origin)) {
        send(socket, { type: 'error', message: 'Origin not allowed.' });
        socket.close();
        return;
    }
    const query = wsQuerySchema.safeParse(request.query);
    if (!query.success) {
        send(socket, { type: 'error', message: 'Missing token.' });
        socket.close();
        return;
    }
    const authContext = await authenticateToken(query.data.token);
    if (!authContext) {
        send(socket, { type: 'error', message: 'Authentication required.' });
        socket.close();
        return;
    }
    const userSockets = socketsByUserId.get(authContext.user.id) ?? new Map();
    const isFirstConnection = userSockets.size === 0;
    userSockets.set(authContext.session.sessionId, socket);
    socketsByUserId.set(authContext.user.id, userSockets);
    send(socket, {
        type: 'presence',
        self: toPublicUser(authContext.user),
        peers: listOnlinePeers(authContext.user.id),
    });
    if (isFirstConnection) {
        broadcastExcept(authContext.user.id, {
            type: 'peer-joined',
            peer: toPublicUser(authContext.user),
        });
    }
    socket.on('message', (rawMessage) => {
        void handleSocketMessage(authContext.user.id, authContext.session.sessionId, socket, rawMessage.toString());
    });
    socket.on('close', () => {
        if (detachSocket(authContext.user.id, authContext.session.sessionId)) {
            broadcastExcept(authContext.user.id, { type: 'peer-left', peerId: authContext.user.id });
        }
    });
}
async function handleSocketMessage(userId, sessionId, socket, rawMessage) {
    const authContext = await authenticateTokenFromSession(userId, sessionId);
    if (!authContext) {
        send(socket, { type: 'error', message: 'Session expired.' });
        socket.close();
        return;
    }
    const parsed = parseClientMessage(rawMessage);
    if (!parsed) {
        send(socket, { type: 'error', message: 'Unsupported signaling message.' });
        return;
    }
    if (parsed.type === 'ping') {
        send(socket, { type: 'pong' });
        return;
    }
    if (parsed.type === 'image-generation') {
        try {
            const generatedImage = await generateImageFromPrompt(parsed.prompt);
            send(socket, {
                type: 'image-generated',
                requestId: parsed.requestId,
                peerId: parsed.peerId,
                prompt: parsed.prompt,
                createdAt: Date.now(),
                mimeType: generatedImage.mimeType,
                imageBase64: generatedImage.imageBase64,
            });
        }
        catch (error) {
            app.log.warn({ err: error, userId, peerId: parsed.peerId }, 'Ollama image generation failed');
            send(socket, {
                type: 'image-generation-error',
                requestId: parsed.requestId,
                peerId: parsed.peerId,
                message: error instanceof Error ? error.message : 'Image generation failed.',
            });
        }
        return;
    }
    if (parsed.type === 'speech-transcription') {
        try {
            const text = await transcribeAudioPayload(parsed.requestId, parsed.audioBase64, parsed.mimeType);
            send(socket, {
                type: 'speech-transcribed',
                requestId: parsed.requestId,
                text,
            });
        }
        catch (error) {
            app.log.warn({ err: error, userId }, 'Speech transcription failed');
            send(socket, {
                type: 'speech-transcription-error',
                requestId: parsed.requestId,
                message: error instanceof Error ? error.message : 'Speech transcription failed.',
            });
        }
        return;
    }
    let delivered = 0;
    const recipientSockets = socketsByUserId.get(parsed.to);
    if (recipientSockets) {
        for (const [recipientSessionId, recipientSocket] of recipientSockets.entries()) {
            const recipientContext = await authenticateTokenFromSession(parsed.to, recipientSessionId);
            if (!recipientContext) {
                recipientSocket.close();
                continue;
            }
            send(recipientSocket, {
                type: 'signal',
                from: authContext.user.id,
                signal: parsed.signal,
            });
            delivered += 1;
        }
    }
    if (delivered === 0) {
        send(socket, { type: 'error', message: 'Peer is offline or not authenticated.' });
    }
}
function createAuthReply(user, sessionId) {
    return {
        token: app.jwt.sign({
            sub: user.id,
            username: user.username,
            displayName: user.displayName,
            sid: sessionId,
        }),
        user: toPublicUser(user),
        messageEncryptionKey: user.messageEncryptionKey,
    };
}
async function authenticateRequest(request, reply) {
    const token = extractBearerToken(request.headers.authorization);
    if (!token) {
        reply.code(401).send({ message: 'Authentication required.' });
        return null;
    }
    const authContext = await authenticateToken(token);
    if (!authContext) {
        reply.code(401).send({ message: 'Invalid or expired session.' });
        return null;
    }
    return authContext;
}
async function authenticateToken(token) {
    let decoded;
    try {
        decoded = app.jwt.verify(token);
    }
    catch {
        return null;
    }
    return authenticateTokenFromSession(decoded.sub, decoded.sid, decoded);
}
async function authenticateTokenFromSession(userId, sessionId, decoded) {
    const session = await getSession(sessionId);
    if (!session || session.userId !== userId) {
        return null;
    }
    const user = findUserById(userId);
    if (!user) {
        await destroySession(sessionId);
        return null;
    }
    if (!user.isActive) {
        await destroySession(sessionId);
        return null;
    }
    await redis.expire(sessionKey(sessionId), sessionTtlSeconds);
    return {
        user,
        session,
        token: decoded ?? {
            sub: user.id,
            username: user.username,
            displayName: user.displayName,
            sid: sessionId,
        },
    };
}
async function convertOfficeDocumentToPdf(fileName, fileBase64) {
    const inputBuffer = Buffer.from(fileBase64, 'base64');
    if (inputBuffer.byteLength === 0) {
        throw new Error('The uploaded office document is empty.');
    }
    const normalizedFileName = normalizeOfficeDocumentFileName(fileName);
    return convertOfficeDocument(inputBuffer, '.pdf', undefined, { fileName: normalizedFileName });
}
function isSupportedOfficeDocument(fileName, mimeType) {
    const normalizedFileName = fileName.trim().toLowerCase();
    const normalizedMimeType = mimeType.trim().toLowerCase();
    if (normalizedMimeType === 'application/vnd.openxmlformats-officedocument.wordprocessingml.document'
        || normalizedMimeType === 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet'
        || normalizedMimeType === 'application/vnd.openxmlformats-officedocument.presentationml.presentation') {
        return true;
    }
    return /\.(docx|xlsx|xslx|pptx)$/i.test(normalizedFileName);
}
function normalizeOfficeDocumentFileName(fileName) {
    return fileName.trim().replace(/\.xslx$/i, '.xlsx');
}
function describeOfficePreviewFailure(error) {
    if (error && typeof error === 'object' && 'code' in error && error.code === 'ENOENT') {
        return 'Office preview generation failed because LibreOffice is not installed on the server.';
    }
    if (error instanceof Error && error.message.trim()) {
        return `Office preview generation failed: ${error.message}`;
    }
    return 'Office preview generation failed.';
}
function createUser(input) {
    const createdAt = new Date().toISOString();
    const user = {
        id: crypto.randomUUID(),
        username: input.username,
        displayName: input.displayName,
        passwordHash: hashPassword(input.password),
        messageEncryptionKey: generateUserMessageEncryptionKey(),
        isActive: input.isActive,
        createdAt,
        approvedAt: input.isActive ? createdAt : null,
    };
    createUserStatement.run(user.id, user.username, user.displayName, encryptJson({
        passwordHash: user.passwordHash,
        messageEncryptionKey: user.messageEncryptionKey,
    }), user.isActive ? 1 : 0, user.approvedAt, user.createdAt);
    return user;
}
function listPendingApprovalUsers() {
    const rows = selectPendingUsersStatement.all();
    return rows.map((row) => ({
        id: row.id,
        username: row.username,
        displayName: row.display_name,
        createdAt: row.created_at,
    }));
}
function listAdminUsers() {
    const rows = selectAllUsersStatement.all();
    return rows.map((row) => ({
        id: row.id,
        username: row.username,
        displayName: row.display_name,
        isActive: row.is_active === 1,
        createdAt: row.created_at,
        approvedAt: row.approved_at,
    }));
}
function approveUser(userId) {
    const approvedAt = new Date().toISOString();
    const result = approveUserStatement.run(approvedAt, userId);
    if (result.changes === 0) {
        return null;
    }
    return findUserById(userId);
}
async function deleteUserAccount(userId) {
    const user = findUserById(userId);
    if (!user) {
        return null;
    }
    deleteAccessKeysByUserStatement.run(userId);
    const result = deleteUserStatement.run(userId);
    if (result.changes === 0) {
        return null;
    }
    await destroyUserSessions(userId);
    return user;
}
function persistAccessKey(userId, input) {
    createAccessKeyStatement.run(crypto.randomUUID(), userId, input.credentialId, input.label, encryptJson({
        credentialId: input.credentialId,
        publicKey: input.publicKey,
        counter: input.counter,
        transports: input.transports,
        deviceType: input.deviceType,
        backedUp: input.backedUp,
        aaguid: input.aaguid,
    }), new Date().toISOString());
}
function updateStoredAccessKey(storedAccessKey, changes) {
    const nextRegistration = {
        ...storedAccessKey.registration,
        counter: changes.counter,
        deviceType: changes.deviceType,
        backedUp: changes.backedUp,
    };
    updateAccessKeyStatement.run(encryptJson(nextRegistration), storedAccessKey.row.credential_id);
}
function findUserByUsername(username) {
    const row = selectUserByUsernameStatement.get(username);
    return row ? hydrateUser(row) : null;
}
function findUserById(userId) {
    const row = selectUserByIdStatement.get(userId);
    return row ? hydrateUser(row) : null;
}
function hydrateUser(row) {
    const credentials = decryptJson(row.encrypted_credentials);
    const messageEncryptionKey = credentials.messageEncryptionKey ?? generateUserMessageEncryptionKey();
    if (!credentials.messageEncryptionKey) {
        updateUserCredentialsStatement.run(encryptJson({
            passwordHash: credentials.passwordHash,
            messageEncryptionKey,
        }), row.id);
    }
    return {
        id: row.id,
        username: row.username,
        displayName: row.display_name,
        passwordHash: credentials.passwordHash,
        messageEncryptionKey,
        isActive: row.is_active === 1,
        createdAt: row.created_at,
        approvedAt: row.approved_at,
    };
}
function listStoredAccessKeys(userId) {
    const rows = selectAccessKeysByUserStatement.all(userId);
    return rows.map((row) => decryptJson(row.encrypted_registration));
}
function findStoredAccessKeyByCredentialId(credentialId) {
    const row = selectAccessKeyByCredentialIdStatement.get(credentialId);
    if (!row) {
        return null;
    }
    const user = findUserById(row.user_id);
    if (!user) {
        return null;
    }
    return {
        row,
        user,
        registration: decryptJson(row.encrypted_registration),
    };
}
function listAccessKeys(userId) {
    const rows = selectAccessKeysByUserStatement.all(userId);
    return rows.map((row) => {
        const registration = decryptJson(row.encrypted_registration);
        return {
            id: row.id,
            credentialId: row.credential_id,
            label: row.label,
            transports: registration.transports,
            deviceType: registration.deviceType,
            backedUp: registration.backedUp,
            aaguid: registration.aaguid,
            createdAt: row.created_at,
        };
    });
}
function loadOrCreateSecret(name, createValue) {
    const row = selectSecretStatement.get(name);
    if (row) {
        return decryptText(row.encrypted_value);
    }
    const value = createValue();
    insertSecretStatement.run(name, encryptText(value), new Date().toISOString());
    return value;
}
async function createSession(userId) {
    const session = {
        sessionId: crypto.randomUUID(),
        userId,
        createdAt: new Date().toISOString(),
    };
    await redis.set(sessionKey(session.sessionId), JSON.stringify(session), 'EX', sessionTtlSeconds);
    return session;
}
async function getSession(sessionId) {
    const payload = await redis.get(sessionKey(sessionId));
    if (!payload) {
        return null;
    }
    return JSON.parse(payload);
}
async function destroySession(sessionId) {
    await redis.del(sessionKey(sessionId));
}
async function destroyUserSessions(userId) {
    let cursor = '0';
    do {
        const [nextCursor, keys] = await redis.scan(cursor, 'MATCH', `${sessionKey('*')}`, 'COUNT', 100);
        cursor = nextCursor;
        for (const key of keys) {
            const payload = await redis.get(key);
            if (!payload) {
                continue;
            }
            let session = null;
            try {
                session = JSON.parse(payload);
            }
            catch {
                session = null;
            }
            if (!session || session.userId !== userId) {
                continue;
            }
            await destroySession(session.sessionId);
            await clearPendingRegistration(session.sessionId);
            closeSocketSession(userId, session.sessionId);
        }
    } while (cursor !== '0');
}
function sessionKey(sessionId) {
    return `privatechat:session:${sessionId}`;
}
function webAuthnRegistrationKey(sessionId) {
    return `privatechat:webauthn-registration:${sessionId}`;
}
function webAuthnAuthenticationKey(attemptId) {
    return `privatechat:webauthn-authentication:${attemptId}`;
}
async function getPendingRegistration(sessionId) {
    const payload = await redis.get(webAuthnRegistrationKey(sessionId));
    if (!payload) {
        return null;
    }
    return JSON.parse(payload);
}
async function clearPendingRegistration(sessionId) {
    await redis.del(webAuthnRegistrationKey(sessionId));
}
async function getPendingAuthentication(attemptId) {
    const payload = await redis.get(webAuthnAuthenticationKey(attemptId));
    if (!payload) {
        return null;
    }
    return JSON.parse(payload);
}
async function clearPendingAuthentication(attemptId) {
    await redis.del(webAuthnAuthenticationKey(attemptId));
}
function closeSocketSession(userId, sessionId) {
    const socket = socketsByUserId.get(userId)?.get(sessionId);
    if (socket && socket.readyState < 2) {
        socket.close();
    }
}
function detachSocket(userId, sessionId) {
    const userSockets = socketsByUserId.get(userId);
    if (!userSockets) {
        return false;
    }
    userSockets.delete(sessionId);
    if (userSockets.size === 0) {
        socketsByUserId.delete(userId);
        return true;
    }
    return false;
}
function listOnlinePeers(currentUserId) {
    const peers = [];
    for (const [userId, sockets] of socketsByUserId.entries()) {
        if (userId === currentUserId || sockets.size === 0) {
            continue;
        }
        const user = findUserById(userId);
        if (user) {
            peers.push(toPublicUser(user));
        }
    }
    return peers.sort((left, right) => left.displayName.localeCompare(right.displayName));
}
function broadcastExcept(userId, payload) {
    for (const [peerId, sockets] of socketsByUserId.entries()) {
        if (peerId === userId) {
            continue;
        }
        for (const socket of sockets.values()) {
            send(socket, payload);
        }
    }
}
function send(socket, payload) {
    if (socket.readyState === 1) {
        socket.send(JSON.stringify(payload));
    }
}
function parseClientMessage(rawMessage) {
    let payload;
    try {
        payload = JSON.parse(rawMessage);
    }
    catch {
        return null;
    }
    const parsed = signalMessageSchema.safeParse(payload);
    if (!parsed.success) {
        return null;
    }
    if (parsed.data.type === 'ping') {
        return { type: 'ping' };
    }
    if (parsed.data.type === 'image-generation') {
        return {
            type: 'image-generation',
            requestId: parsed.data.requestId,
            peerId: parsed.data.peerId,
            prompt: parsed.data.prompt,
        };
    }
    if (parsed.data.type === 'speech-transcription') {
        return {
            type: 'speech-transcription',
            requestId: parsed.data.requestId,
            mimeType: parsed.data.mimeType,
            audioBase64: parsed.data.audioBase64,
        };
    }
    return {
        type: 'signal',
        to: parsed.data.to,
        signal: normalizeSignal(parsed.data.signal),
    };
}
async function transcribeAudioPayload(requestId, audioBase64, mimeType) {
    return await speechTranscriber.transcribe(requestId, audioBase64, mimeType);
}
async function generateImageFromPrompt(prompt) {
    const abortController = new AbortController();
    const timeoutId = setTimeout(() => abortController.abort(), 120_000);
    try {
        const response = await fetch(`${ollamaServerUrl}/v1/images/generations`, {
            method: 'POST',
            headers: {
                'Content-Type': 'application/json',
            },
            body: JSON.stringify({
                model: ollamaImageModel,
                prompt,
                size: ollamaImageSize,
                response_format: 'b64_json',
                n: 1,
            }),
            signal: abortController.signal,
        });
        const payload = await response.json();
        if (!response.ok) {
            const errorMessage = typeof payload.error === 'string'
                ? payload.error
                : payload.error?.message;
            throw new Error(errorMessage || 'Ollama image generation request failed.');
        }
        const imageBase64 = payload.data?.[0]?.b64_json?.trim();
        if (!imageBase64) {
            throw new Error('Ollama did not return image data.');
        }
        return {
            imageBase64,
            mimeType: inferImageMimeType(Buffer.from(imageBase64, 'base64')),
        };
    }
    catch (error) {
        if (error instanceof Error && error.name === 'AbortError') {
            throw new Error('Ollama image generation timed out.');
        }
        throw error;
    }
    finally {
        clearTimeout(timeoutId);
    }
}
function inferImageMimeType(imageBuffer) {
    if (imageBuffer.length >= 8 && imageBuffer.subarray(0, 8).equals(Buffer.from([137, 80, 78, 71, 13, 10, 26, 10]))) {
        return 'image/png';
    }
    if (imageBuffer.length >= 3 && imageBuffer.subarray(0, 3).equals(Buffer.from([255, 216, 255]))) {
        return 'image/jpeg';
    }
    if (imageBuffer.length >= 12 &&
        imageBuffer.subarray(0, 4).toString('ascii') === 'RIFF' &&
        imageBuffer.subarray(8, 12).toString('ascii') === 'WEBP') {
        return 'image/webp';
    }
    if (imageBuffer.length >= 6) {
        const header = imageBuffer.subarray(0, 6).toString('ascii');
        if (header === 'GIF87a' || header === 'GIF89a') {
            return 'image/gif';
        }
    }
    return 'application/octet-stream';
}
function getFrontendBundleManifest() {
    if (!fs.existsSync(frontendIndexPath)) {
        return null;
    }
    const files = listBundleFilePaths(frontendDistPath).map((absolutePath) => {
        const relativePath = toBundleRelativePath(path.relative(frontendDistPath, absolutePath));
        const stats = fs.statSync(absolutePath);
        const sha256 = crypto.createHash('sha256').update(fs.readFileSync(absolutePath)).digest('hex');
        return {
            path: relativePath,
            size: stats.size,
            sha256,
            lastModified: stats.mtime.toISOString(),
            contentType: detectBundleContentType(relativePath),
            href: bundleAssetHref(relativePath),
        };
    });
    files.sort((left, right) => left.path.localeCompare(right.path));
    const generatedAt = files.reduce((latest, file) => (file.lastModified > latest ? file.lastModified : latest), new Date(0).toISOString());
    const bundleId = files.reduce((hash, file) => {
        hash.update(file.path);
        hash.update(file.sha256);
        hash.update(String(file.size));
        return hash;
    }, crypto.createHash('sha256')).digest('hex');
    return {
        bundleId,
        generatedAt,
        indexPath: 'index.html',
        files,
    };
}
function resolveFrontendBundleAsset(relativeAssetPath) {
    if (!fs.existsSync(frontendIndexPath) || !fs.existsSync(frontendDistPath)) {
        return null;
    }
    const normalizedPath = toBundleRelativePath(relativeAssetPath);
    if (normalizedPath.length === 0 ||
        normalizedPath === '.' ||
        normalizedPath.startsWith('../') ||
        normalizedPath.startsWith('/')) {
        return null;
    }
    const absolutePath = path.resolve(frontendDistPath, normalizedPath);
    const relativeToRoot = path.relative(frontendDistPath, absolutePath);
    if (relativeToRoot.startsWith('..') || path.isAbsolute(relativeToRoot) || !fs.existsSync(absolutePath)) {
        return null;
    }
    const stats = fs.statSync(absolutePath);
    if (!stats.isFile()) {
        return null;
    }
    return {
        absolutePath,
        contentType: detectBundleContentType(normalizedPath),
        size: stats.size,
        lastModifiedMs: stats.mtimeMs,
        etag: `${stats.size}-${Math.floor(stats.mtimeMs)}`,
    };
}
function listBundleFilePaths(rootPath) {
    return fs.readdirSync(rootPath, { withFileTypes: true }).flatMap((entry) => {
        const entryPath = path.join(rootPath, entry.name);
        if (entry.isDirectory()) {
            return listBundleFilePaths(entryPath);
        }
        if (!entry.isFile()) {
            return [];
        }
        return [entryPath];
    });
}
function bundleAssetHref(relativePath) {
    return `/api/web-app/files/${relativePath.split('/').map((segment) => encodeURIComponent(segment)).join('/')}`;
}
function toBundleRelativePath(inputPath) {
    return path.posix.normalize(inputPath.replaceAll('\\', '/'));
}
function detectBundleContentType(assetPath) {
    const extension = path.extname(assetPath).toLowerCase();
    switch (extension) {
        case '.mp3':
            return 'audio/mpeg';
        case '.m4a':
            return 'audio/mp4';
        case '.css':
            return 'text/css; charset=utf-8';
        case '.html':
            return 'text/html; charset=utf-8';
        case '.ico':
            return 'image/x-icon';
        case '.jpeg':
        case '.jpg':
            return 'image/jpeg';
        case '.js':
            return 'text/javascript; charset=utf-8';
        case '.json':
            return 'application/json; charset=utf-8';
        case '.map':
            return 'application/json; charset=utf-8';
        case '.png':
            return 'image/png';
        case '.svg':
            return 'image/svg+xml; charset=utf-8';
        case '.txt':
            return 'text/plain; charset=utf-8';
        case '.webp':
            return 'image/webp';
        case '.webmanifest':
            return 'application/manifest+json; charset=utf-8';
        case '.woff':
            return 'font/woff';
        case '.woff2':
            return 'font/woff2';
        default:
            return 'application/octet-stream';
    }
}
function requestMatchesEtag(headerValue, etag) {
    if (!headerValue) {
        return false;
    }
    const incomingEtags = Array.isArray(headerValue)
        ? headerValue
        : headerValue.split(',').map((value) => value.trim());
    return incomingEtags.includes(etag) || incomingEtags.includes('*');
}
function normalizeSignal(signal) {
    if (signal.type === 'sdp') {
        return {
            type: 'sdp',
            description: signal.description,
        };
    }
    return {
        type: 'ice-candidate',
        candidate: signal.candidate,
    };
}
function extractBearerToken(authorizationHeader) {
    if (!authorizationHeader?.startsWith('Bearer ')) {
        return null;
    }
    return authorizationHeader.slice('Bearer '.length).trim();
}
function toPublicUser(user) {
    return {
        id: user.id,
        username: user.username,
        displayName: user.displayName,
    };
}
function isApprovalAdmin(user) {
    return user.username === approvalAdminUsername;
}
function hashPassword(password) {
    const salt = crypto.randomBytes(16).toString('hex');
    const derived = crypto.scryptSync(password, salt, 64).toString('hex');
    return `${salt}:${derived}`;
}
function verifyPassword(password, storedHash) {
    const [salt, stored] = storedHash.split(':');
    if (!salt || !stored) {
        return false;
    }
    const incoming = crypto.scryptSync(password, salt, 64);
    const saved = Buffer.from(stored, 'hex');
    return incoming.length === saved.length && crypto.timingSafeEqual(incoming, saved);
}
function generateUserMessageEncryptionKey() {
    return crypto.randomBytes(32).toString('base64url');
}
function encryptJson(value) {
    return encryptText(JSON.stringify(value));
}
function decryptJson(payload) {
    return JSON.parse(decryptText(payload));
}
function encryptText(value) {
    const iv = crypto.randomBytes(12);
    const cipher = crypto.createCipheriv('aes-256-gcm', encryptionKey, iv);
    const encrypted = Buffer.concat([cipher.update(value, 'utf8'), cipher.final()]);
    const authTag = cipher.getAuthTag();
    return `${iv.toString('hex')}:${authTag.toString('hex')}:${encrypted.toString('hex')}`;
}
function decryptText(payload) {
    const [ivHex, authTagHex, encryptedHex] = payload.split(':');
    if (!ivHex || !authTagHex || !encryptedHex) {
        throw new Error('Encrypted payload is malformed.');
    }
    const decipher = crypto.createDecipheriv('aes-256-gcm', encryptionKey, Buffer.from(ivHex, 'hex'));
    decipher.setAuthTag(Buffer.from(authTagHex, 'hex'));
    const decrypted = Buffer.concat([
        decipher.update(Buffer.from(encryptedHex, 'hex')),
        decipher.final(),
    ]);
    return decrypted.toString('utf8');
}
function loadOrCreateMasterKey(masterKeyFilePath) {
    if (process.env.PRIVATECHAT_MASTER_KEY) {
        return process.env.PRIVATECHAT_MASTER_KEY;
    }
    if (fs.existsSync(masterKeyFilePath)) {
        return fs.readFileSync(masterKeyFilePath, 'utf8').trim();
    }
    const generatedKey = crypto.randomBytes(32).toString('hex');
    fs.writeFileSync(masterKeyFilePath, generatedKey, { mode: 0o600 });
    return generatedKey;
}
function ensureUserApprovalColumns() {
    const rows = database.prepare('PRAGMA table_info(users)').all();
    const columnNames = new Set(rows.map((row) => row.name));
    if (!columnNames.has('is_active')) {
        database.exec('ALTER TABLE users ADD COLUMN is_active INTEGER NOT NULL DEFAULT 1');
    }
    if (!columnNames.has('approved_at')) {
        database.exec('ALTER TABLE users ADD COLUMN approved_at TEXT');
    }
    database.exec(`
    UPDATE users
    SET approved_at = COALESCE(approved_at, created_at)
    WHERE is_active = 1
  `);
}
function deriveEncryptionKey(masterKeyMaterial) {
    return crypto.createHash('sha256').update(masterKeyMaterial).digest();
}
function resolveStoragePath(targetPath) {
    return path.isAbsolute(targetPath) ? targetPath : path.resolve(process.cwd(), targetPath);
}
function resolveProjectPath(targetPath) {
    return path.isAbsolute(targetPath) ? targetPath : path.resolve(projectRootPath, targetPath);
}
function parseAllowedOrigins(value) {
    if (!value) {
        return new Set();
    }
    return new Set(value
        .split(',')
        .map((origin) => normalizeOrigin(origin))
        .filter((origin) => origin.length > 0 && origin !== 'null'));
}
function normalizeOrigin(origin) {
    const trimmed = origin.trim();
    if (trimmed === 'null') {
        return trimmed;
    }
    return trimmed.replace(/\/+$/, '');
}
function isAllowedRequestOrigin(originHeader) {
    if (!originHeader) {
        return true;
    }
    const origin = normalizeOrigin(originHeader);
    if (origin === 'null') {
        return true;
    }
    if (allowedCorsOrigins.size === 0) {
        return true;
    }
    return allowedCorsOrigins.has(origin);
}
function resolveWebAuthnOrigin(request) {
    const originHeader = request.headers.origin;
    if (typeof originHeader === 'string' && originHeader.length > 0) {
        return originHeader;
    }
    return webAuthnOrigin;
}
function resolveWebAuthnUserVerification(value) {
    switch (value?.toLowerCase()) {
        case 'discouraged':
            return 'discouraged';
        case 'required':
            return 'required';
        default:
            return 'preferred';
    }
}
function bytesToBase64Url(value) {
    return Buffer.from(value).toString('base64url');
}
function defaultAccessKeyLabel() {
    return `Access key ${new Date().toISOString().replace('T', ' ').slice(0, 16)}`;
}