// services/daemonWebSocketBridge.js
import WebSocket from 'ws';
import { getIo } from '../utils/socket.js';

class DaemonWebSocketBridge {
    constructor() {
        this.daemonSocket = null;
        this.reconnectInterval = 5000;
        this.maxReconnectAttempts = 10;
        this.reconnectAttempts = 0;
        this.isConnected = false;
    }

    connect() {
        if (this.daemonSocket && this.daemonSocket.readyState === WebSocket.OPEN) {
            console.log('🔌 Daemon WebSocket bereits verbunden');
            return;
        }

        const daemonUrl = process.env.DAEMON_WS_URL || 'wss://www.your-part.de:4551';
        console.log('🔌 Verbinde mit Daemon WebSocket:', daemonUrl);

        try {
            this.daemonSocket = new WebSocket(daemonUrl);

            this.daemonSocket.on('open', () => {
                console.log('✅ Daemon WebSocket verbunden');
                console.log('🔍 Daemon URL:', daemonUrl);
                console.log('🔍 ReadyState:', this.daemonSocket.readyState);
                console.log('🔍 Protocol:', this.daemonSocket.protocol);
                console.log('🔍 Extensions:', this.daemonSocket.extensions);
                this.isConnected = true;
                this.reconnectAttempts = 0;
                
                // Registriere uns beim Daemon
                console.log('📤 Registriere Backend beim Daemon...');
                this.send({
                    event: 'register_backend',
                    data: { type: 'backend_bridge' }
                });
            });

            this.daemonSocket.on('message', (data) => {
                const rawMessage = data.toString();
                console.log('='.repeat(80));
                console.log('📨 DAEMON → BACKEND');
                console.log('📨 Raw Message:', rawMessage);
                console.log('📨 Länge:', rawMessage.length);
                console.log('📨 Zeitstempel:', new Date().toISOString());
                
                // Ignoriere ping/pong-Nachrichten
                if (rawMessage === 'ping' || rawMessage === 'pong') {
                    console.log('🏓 Ping/Pong-Nachricht ignoriert');
                    console.log('='.repeat(80));
                    return;
                }
                
                try {
                    const message = JSON.parse(rawMessage);
                    console.log('✅ JSON erfolgreich geparst');
                    console.log('📨 Parsed Message:', JSON.stringify(message, null, 2));
                    this.handleDaemonMessage(message);
                } catch (error) {
                    console.error('❌ JSON Parse Fehler:');
                    console.error('❌ Error:', error.message);
                    console.error('❌ Raw data:', rawMessage);
                    console.error('❌ Hex:', Buffer.from(rawMessage, 'utf8').toString('hex'));
                    console.log('='.repeat(80));
                }
            });

            this.daemonSocket.on('close', (code, reason) => {
                console.log('❌ Daemon WebSocket getrennt:', code, reason.toString());
                this.isConnected = false;
                this.scheduleReconnect();
            });

            this.daemonSocket.on('error', (error) => {
                console.error('❌ Daemon WebSocket Fehler:', error.message);
                this.isConnected = false;
            });

        } catch (error) {
            console.error('❌ Fehler beim Erstellen der Daemon WebSocket-Verbindung:', error);
            this.scheduleReconnect();
        }
    }

    handleDaemonMessage(message) {
        console.log('🔍 BACKEND VERARBEITUNG');
        console.log('🔍 Message Type:', typeof message);
        console.log('🔍 Message Keys:', Object.keys(message || {}));
        
        // Prüfe verschiedene Nachrichtenformate
        let eventName = null;
        let eventData = {};
        
        if (message.event) {
            // Standard-Format: { event: 'eventName', data: {...} }
            console.log('🔍 Format: Standard (event)');
            eventName = message.event;
            eventData = message.data || {};
        } else if (message.type) {
            // Alternative Format: { type: 'eventName', ... }
            console.log('🔍 Format: Alternative (type)');
            eventName = message.type;
            eventData = { ...message };
            delete eventData.type;
        } else if (typeof message === 'string') {
            // String-Format: 'eventName'
            console.log('🔍 Format: String');
            eventName = message;
        } else if (Array.isArray(message)) {
            // Array-Format: ['eventName', {...}]
            console.log('🔍 Format: Array');
            eventName = message[0];
            eventData = message[1] || {};
        } else {
            console.log('⚠️ Format: Unbekannt');
            eventName = 'unknown_event';
            eventData = message;
        }
        
        console.log('🔍 Extracted Event:', eventName);
        console.log('🔍 Extracted Data:', eventData);
        
        // Leite spezifische Events an Socket.io weiter
        if (eventName) {
            const io = getIo();
            console.log('📤 BACKEND → FRONTEND');
            console.log('📤 Socket.io verfügbar:', !!io);
            console.log('📤 Event Name:', eventName);
            console.log('📤 Event Data:', eventData);
            
            switch (eventName) {
                case 'production_ready':
                case 'stock_change':
                case 'price_update':
                case 'director_death':
                case 'production_started':
                case 'selled_items':
                case 'falukantUpdateStatus':
                case 'falukantBranchUpdate':
                case 'knowledge_update':
                case 'familychanged':
                    // Broadcast an alle verbundenen Clients
                    console.log(`📤 Sende Event "${eventName}" an alle Socket.io Clients...`);
                    if (io) {
                        io.emit(eventName, eventData);
                        console.log(`✅ Event "${eventName}" erfolgreich an Socket.io gesendet`);
                        console.log(`✅ Data:`, JSON.stringify(eventData, null, 2));
                    } else {
                        console.error('❌ Socket.io nicht verfügbar!');
                    }
                    break;
                    
                case 'workerStatus':
                    // Spezielle Behandlung für Worker-Status
                    console.log(`📤 Sende Worker-Status Event an alle Socket.io Clients...`);
                    if (io) {
                        io.emit('daemon_worker_status', eventData);
                        console.log(`✅ Worker-Status erfolgreich an Socket.io gesendet`);
                        console.log(`✅ Data:`, JSON.stringify(eventData, null, 2));
                    } else {
                        console.error('❌ Socket.io nicht verfügbar!');
                    }
                    break;
                    
                default:
                    console.log('⚠️ Unbekanntes Daemon-Event:', eventName);
                    console.log('⚠️ Event wird nicht weitergeleitet');
            }
        } else {
            console.log('⚠️ Kein Event-Name extrahiert - keine Weiterleitung');
        }
        
        console.log('='.repeat(80));
    }

    send(data) {
        console.log('📤 BACKEND → DAEMON');
        console.log('📤 Data:', JSON.stringify(data, null, 2));
        console.log('📤 WebSocket Status:', this.daemonSocket ? this.daemonSocket.readyState : 'CLOSED');
        
        if (this.daemonSocket && this.daemonSocket.readyState === WebSocket.OPEN) {
            const message = JSON.stringify(data);
            console.log('📤 Sende an Daemon:', message);
            this.daemonSocket.send(message);
            console.log('✅ Nachricht erfolgreich an Daemon gesendet');
        } else {
            console.warn('⚠️ Daemon WebSocket nicht verbunden - kann Nachricht nicht senden');
            console.warn('⚠️ ReadyState:', this.daemonSocket ? this.daemonSocket.readyState : 'CLOSED');
        }
        console.log('='.repeat(80));
    }

    scheduleReconnect() {
        if (this.reconnectAttempts >= this.maxReconnectAttempts) {
            console.error('❌ Maximale Wiederverbindungsversuche erreicht');
            return;
        }

        this.reconnectAttempts++;
        const delay = Math.min(this.reconnectInterval * this.reconnectAttempts, 30000);
        
        console.log(`🔄 Wiederverbindung in ${delay}ms (Versuch ${this.reconnectAttempts}/${this.maxReconnectAttempts})`);
        
        setTimeout(() => {
            this.connect();
        }, delay);
    }

    disconnect() {
        if (this.daemonSocket) {
            this.daemonSocket.close();
            this.daemonSocket = null;
            this.isConnected = false;
        }
    }

    getStatus() {
        return {
            connected: this.isConnected,
            reconnectAttempts: this.reconnectAttempts,
            readyState: this.daemonSocket ? this.daemonSocket.readyState : 'CLOSED'
        };
    }
}

// Singleton-Instanz
const daemonBridge = new DaemonWebSocketBridge();

export default daemonBridge;