/**
 * API Server Augmentation - Universal API Exposure
 *
 * 🌐 Exposes Brainy through REST, WebSocket, and MCP
 * 🔌 Works in Node.js, Deno, and Service Workers
 * 🚀 Single augmentation for all API needs
 *
 * This unifies and replaces:
 * - BrainyMCPBroadcast (Node-specific server)
 * - WebSocketConduitAugmentation (client connections)
 * - Future REST API implementations
 */
import { BaseAugmentation } from './brainyAugmentation.js';
import { BrainyMCPService } from '../mcp/brainyMCPService.js';
import { v4 as uuidv4 } from '../universal/uuid.js';
import { isNode, isBrowser } from '../utils/environment.js';
/**
 * Unified API Server Augmentation
 * Exposes Brainy through multiple protocols
 */
export class APIServerAugmentation extends BaseAugmentation {
    constructor(config = {}) {
        super();
        this.name = 'api-server';
        this.timing = 'after';
        this.metadata = 'readonly'; // API server reads metadata to serve data
        this.operations = ['all'];
        this.priority = 5; // Low priority, runs after other augmentations
        this.clients = new Map();
        this.operationHistory = [];
        this.maxHistorySize = 1000;
        this.config = {
            enabled: true,
            port: 3000,
            host: '0.0.0.0',
            cors: { origin: '*', credentials: true },
            auth: { required: false },
            rateLimit: { windowMs: 60000, max: 100 },
            ...config
        };
    }
    async onInitialize() {
        if (!this.config.enabled) {
            this.log('API Server disabled in config');
            return;
        }
        // Initialize MCP service
        this.mcpService = new BrainyMCPService(this.context.brain, {
            enableAuth: this.config.auth?.required
        });
        // Start appropriate server based on environment
        if (isNode()) {
            await this.startNodeServer();
        }
        else if (typeof globalThis.Deno !== 'undefined') {
            await this.startDenoServer();
        }
        else if (isBrowser() && 'serviceWorker' in navigator) {
            await this.startServiceWorker();
        }
        else {
            this.log('No suitable server environment detected', 'warn');
        }
    }
    /**
     * Start Node.js server with Express
     */
    async startNodeServer() {
        try {
            // Dynamic imports for Node.js dependencies
            const express = await import('express').catch(() => null);
            const cors = await import('cors').catch(() => null);
            const ws = await import('ws').catch(() => null);
            const { createServer } = await import('http');
            if (!express || !cors || !ws) {
                this.log('Express, cors, or ws not available. Install with: npm install express cors ws', 'error');
                return;
            }
            const WebSocketServer = ws?.WebSocketServer || ws?.default?.WebSocketServer || ws?.Server;
            const app = express.default();
            // Middleware
            app.use(cors.default(this.config.cors));
            app.use((express.default || express).json({ limit: '50mb' }));
            app.use(this.authMiddleware.bind(this));
            app.use(this.rateLimitMiddleware.bind(this));
            // REST API Routes
            this.setupRESTRoutes(app);
            // Create HTTP server
            this.httpServer = createServer(app);
            // WebSocket server
            this.wsServer = new WebSocketServer({
                server: this.httpServer,
                path: '/ws'
            });
            this.setupWebSocketServer();
            // Start listening
            await new Promise((resolve, reject) => {
                this.httpServer.listen(this.config.port, this.config.host, () => {
                    this.log(`🌐 API Server listening on http://${this.config.host}:${this.config.port}`);
                    this.log(`🔌 WebSocket: ws://${this.config.host}:${this.config.port}/ws`);
                    this.log(`🧠 MCP endpoint: http://${this.config.host}:${this.config.port}/api/mcp`);
                    resolve();
                }).on('error', reject);
            });
            // Heartbeat interval
            setInterval(() => this.sendHeartbeats(), 30000);
        }
        catch (error) {
            this.log(`Failed to start Node.js server: ${error}`, 'error');
            throw error;
        }
    }
    /**
     * Setup REST API routes
     */
    setupRESTRoutes(app) {
        // Health check
        app.get('/health', (_req, res) => {
            res.json({
                status: 'healthy',
                version: '2.0.0',
                clients: this.clients.size,
                uptime: process.uptime ? process.uptime() : 0
            });
        });
        // Search endpoint
        app.post('/api/search', async (req, res) => {
            try {
                const { query, limit = 10, options = {} } = req.body;
                const results = await this.context.brain.search(query, limit, options);
                res.json({ success: true, results });
            }
            catch (error) {
                res.status(500).json({ success: false, error: error.message });
            }
        });
        // Add data endpoint
        app.post('/api/add', async (req, res) => {
            try {
                const { content, metadata } = req.body;
                const id = await this.context.brain.addNoun(content, 'Content', metadata);
                res.json({ success: true, id });
            }
            catch (error) {
                res.status(500).json({ success: false, error: error.message });
            }
        });
        // Get by ID endpoint
        app.get('/api/get/:id', async (req, res) => {
            try {
                const data = await this.context.brain.get(req.params.id);
                if (data) {
                    res.json({ success: true, data });
                }
                else {
                    res.status(404).json({ success: false, error: 'Not found' });
                }
            }
            catch (error) {
                res.status(500).json({ success: false, error: error.message });
            }
        });
        // Delete endpoint
        app.delete('/api/delete/:id', async (req, res) => {
            try {
                await this.context.brain.delete(req.params.id);
                res.json({ success: true });
            }
            catch (error) {
                res.status(500).json({ success: false, error: error.message });
            }
        });
        // Relate endpoint
        app.post('/api/relate', async (req, res) => {
            try {
                const { source, target, verb, metadata } = req.body;
                await this.context.brain.relate(source, target, verb, metadata);
                res.json({ success: true });
            }
            catch (error) {
                res.status(500).json({ success: false, error: error.message });
            }
        });
        // Find endpoint (complex queries)
        app.post('/api/find', async (req, res) => {
            try {
                const results = await this.context.brain.find(req.body);
                res.json({ success: true, results });
            }
            catch (error) {
                res.status(500).json({ success: false, error: error.message });
            }
        });
        // Cluster endpoint
        app.post('/api/cluster', async (req, res) => {
            try {
                const { algorithm = 'kmeans', options = {} } = req.body;
                const clusters = await this.context.brain.cluster(algorithm, options);
                res.json({ success: true, clusters });
            }
            catch (error) {
                res.status(500).json({ success: false, error: error.message });
            }
        });
        // MCP endpoint
        app.post('/api/mcp', async (req, res) => {
            try {
                const response = await this.mcpService.handleRequest(req.body);
                res.json(response);
            }
            catch (error) {
                res.status(500).json({ success: false, error: error.message });
            }
        });
        // Statistics endpoint
        app.get('/api/stats', async (_req, res) => {
            try {
                const stats = await this.context.brain.getStatistics();
                res.json({ success: true, stats });
            }
            catch (error) {
                res.status(500).json({ success: false, error: error.message });
            }
        });
        // Operation history endpoint
        app.get('/api/history', (_req, res) => {
            res.json({
                success: true,
                history: this.operationHistory.slice(-100)
            });
        });
    }
    /**
     * Setup WebSocket server
     */
    setupWebSocketServer() {
        if (!this.wsServer)
            return;
        this.wsServer.on('connection', (socket, request) => {
            const clientId = uuidv4();
            const client = {
                id: clientId,
                type: 'websocket',
                socket,
                subscriptions: [],
                lastSeen: Date.now()
            };
            this.clients.set(clientId, client);
            // Send welcome message
            socket.send(JSON.stringify({
                type: 'welcome',
                clientId,
                message: 'Connected to Brainy API Server',
                capabilities: ['search', 'add', 'delete', 'relate', 'subscribe', 'mcp']
            }));
            // Handle messages
            socket.on('message', async (message) => {
                try {
                    const msg = JSON.parse(message);
                    await this.handleWebSocketMessage(msg, client);
                }
                catch (error) {
                    socket.send(JSON.stringify({
                        type: 'error',
                        error: error.message
                    }));
                }
            });
            // Handle disconnect
            socket.on('close', () => {
                this.clients.delete(clientId);
                this.log(`Client ${clientId} disconnected`);
            });
            // Handle errors
            socket.on('error', (error) => {
                this.log(`WebSocket error for client ${clientId}: ${error}`, 'error');
            });
        });
    }
    /**
     * Handle WebSocket message
     */
    async handleWebSocketMessage(msg, client) {
        const { socket } = client;
        switch (msg.type) {
            case 'subscribe':
                // Subscribe to operation types
                client.subscriptions = msg.operations || ['all'];
                socket.send(JSON.stringify({
                    type: 'subscribed',
                    operations: client.subscriptions
                }));
                break;
            case 'search':
                const searchResults = await this.context.brain.search(msg.query, msg.limit || 10, msg.options || {});
                socket.send(JSON.stringify({
                    type: 'searchResults',
                    requestId: msg.requestId,
                    results: searchResults
                }));
                break;
            case 'add':
                const id = await this.context.brain.addNoun(msg.content, 'Content', msg.metadata);
                socket.send(JSON.stringify({
                    type: 'addResult',
                    requestId: msg.requestId,
                    id
                }));
                break;
            case 'mcp':
                const mcpResponse = await this.mcpService.handleRequest(msg.request);
                socket.send(JSON.stringify({
                    type: 'mcpResponse',
                    requestId: msg.requestId,
                    response: mcpResponse
                }));
                break;
            case 'heartbeat':
                client.lastSeen = Date.now();
                socket.send(JSON.stringify({
                    type: 'heartbeat',
                    timestamp: Date.now()
                }));
                break;
            default:
                socket.send(JSON.stringify({
                    type: 'error',
                    error: `Unknown message type: ${msg.type}`
                }));
        }
    }
    /**
     * Execute augmentation - broadcast operations to clients
     */
    async execute(operation, params, next) {
        const startTime = Date.now();
        const result = await next();
        const duration = Date.now() - startTime;
        // Record operation in history
        const historyEntry = {
            operation,
            params: this.sanitizeParams(params),
            timestamp: Date.now(),
            duration
        };
        this.operationHistory.push(historyEntry);
        if (this.operationHistory.length > this.maxHistorySize) {
            this.operationHistory.shift();
        }
        // Broadcast to subscribed WebSocket clients
        const message = JSON.stringify({
            type: 'operation',
            operation,
            params: historyEntry.params,
            timestamp: historyEntry.timestamp,
            duration
        });
        for (const client of this.clients.values()) {
            if (client.type === 'websocket' && client.socket) {
                if (client.subscriptions?.includes('all') ||
                    client.subscriptions?.includes(operation)) {
                    try {
                        client.socket.send(message);
                    }
                    catch (error) {
                        // Client might be disconnected
                        this.clients.delete(client.id);
                    }
                }
            }
        }
        return result;
    }
    /**
     * Auth middleware for Express
     */
    authMiddleware(req, res, next) {
        if (!this.config.auth?.required) {
            return next();
        }
        const apiKey = req.headers['x-api-key'];
        const bearerToken = req.headers.authorization?.replace('Bearer ', '');
        if (apiKey && this.config.auth.apiKeys?.includes(apiKey)) {
            return next();
        }
        if (bearerToken && this.config.auth.bearerTokens?.includes(bearerToken)) {
            return next();
        }
        res.status(401).json({ error: 'Unauthorized' });
    }
    /**
     * Rate limiting middleware
     */
    rateLimitMiddleware(req, res, next) {
        // Simple in-memory rate limiting
        // In production, use redis or proper rate limiting library
        const ip = req.ip || req.connection.remoteAddress;
        const now = Date.now();
        const windowMs = this.config.rateLimit?.windowMs || 60000;
        const max = this.config.rateLimit?.max || 100;
        // Clean old entries
        for (const [key, client] of this.clients.entries()) {
            if (now - client.lastSeen > windowMs) {
                this.clients.delete(key);
            }
        }
        // For now, just pass through
        // Real implementation would track requests per IP
        next();
    }
    /**
     * Sanitize parameters before broadcasting
     */
    sanitizeParams(params) {
        if (!params)
            return params;
        const sanitized = { ...params };
        // Remove sensitive fields
        delete sanitized.password;
        delete sanitized.apiKey;
        delete sanitized.token;
        delete sanitized.secret;
        // Truncate large data
        if (sanitized.content && sanitized.content.length > 1000) {
            sanitized.content = sanitized.content.substring(0, 1000) + '...';
        }
        return sanitized;
    }
    /**
     * Send heartbeats to all connected clients
     */
    sendHeartbeats() {
        const now = Date.now();
        for (const [id, client] of this.clients.entries()) {
            if (client.type === 'websocket' && client.socket) {
                // Remove inactive clients
                if (now - client.lastSeen > 60000) {
                    this.clients.delete(id);
                    continue;
                }
                // Send heartbeat
                try {
                    client.socket.send(JSON.stringify({
                        type: 'heartbeat',
                        timestamp: now
                    }));
                }
                catch {
                    // Client disconnected
                    this.clients.delete(id);
                }
            }
        }
    }
    /**
     * Start Deno server
     */
    async startDenoServer() {
        // Deno implementation would go here
        // Using Deno.serve() or oak framework
        this.log('Deno server not yet implemented', 'warn');
    }
    /**
     * Start Service Worker (for browser)
     */
    async startServiceWorker() {
        // Service Worker implementation would go here
        // Intercepts fetch() calls and handles them locally
        this.log('Service Worker API not yet implemented', 'warn');
    }
    /**
     * Shutdown the server
     */
    async onShutdown() {
        // Close all WebSocket connections
        for (const client of this.clients.values()) {
            if (client.socket) {
                try {
                    client.socket.close();
                }
                catch { }
            }
        }
        this.clients.clear();
        // Close servers
        if (this.wsServer) {
            this.wsServer.close();
        }
        if (this.httpServer) {
            await new Promise(resolve => {
                this.httpServer.close(() => resolve());
            });
        }
        this.log('API Server shut down');
    }
}
/**
 * Helper function to create and configure API server
 */
export function createAPIServer(config) {
    return new APIServerAugmentation(config);
}
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