package de.opcua.app;

import de.opcua.app.opc.OpcUaService;
import de.opcua.app.rest.OpcUaRestApi;
import de.opcua.app.scripting.Store;
import de.opcua.app.service.ActionService;

/**
 * Standalone REST API launcher for debugging
 * Run with: mvn exec:java -Dexec.mainClass="de.opcua.app.RestApiLauncher"
 */
public class RestApiLauncher {
    
    public static void main(String[] args) {
        System.out.println("═══════════════════════════════════════════");
        System.out.println("  REST API Standalone Launcher");
        System.out.println("═══════════════════════════════════════════");
        System.out.println();
        
        try {
            System.out.println("[1/3] Creating OPC UA Service...");
            OpcUaService opc = new OpcUaService();
            System.out.println("✅ OPC UA Service created");
            
            System.out.println();
            System.out.println("[2/3] Creating REST API on port 8081...");
            ActionService actionService = new ActionService(opc, new Store());
            OpcUaRestApi api = new OpcUaRestApi(opc, 8081, actionService);
            System.out.println("✅ REST API object created");
            
            System.out.println();
            System.out.println("[3/3] Starting HTTP Server...");
            api.start();
            System.out.println("✅ HTTP Server started successfully!");
            
            System.out.println();
            System.out.println("═══════════════════════════════════════════");
            System.out.println("  ✅ REST API is now running!");
            System.out.println("═══════════════════════════════════════════");
            System.out.println();
            System.out.println("Test with:");
            System.out.println("  curl http://localhost:8081/");
            System.out.println("  curl http://localhost:8081/api/status");
            System.out.println();
            System.out.println("Or open in browser:");
            System.out.println("  http://localhost:8081/");
            System.out.println();
            System.out.println("Press Ctrl+C to stop...");
            System.out.println("─────────────────────────────────────────");
            
            // Keep alive
            Thread.sleep(Long.MAX_VALUE);
            
        } catch (Exception e) {
            System.err.println();
            System.err.println("═══════════════════════════════════════════");
            System.err.println("  ❌ ERROR - Failed to start REST API!");
            System.err.println("═══════════════════════════════════════════");
            System.err.println();
            System.err.println("Error message: " + e.getMessage());
            System.err.println();
            System.err.println("Stack trace:");
            e.printStackTrace();
            System.err.println();
            System.err.println("Common causes:");
            System.err.println("1. Port 8081 already in use");
            System.err.println("   Check: lsof -i :8081");
            System.err.println("   Or:    netstat -an | grep 8081");
            System.err.println();
            System.err.println("2. com.sun.net.httpserver not available");
            System.err.println("   Make sure you're using JDK (not JRE)");
            System.err.println("   Check: java -version");
            System.err.println();
            System.err.println("3. Firewall blocking port");
            System.err.println("   Try: sudo ufw allow 8081 (Linux)");
            System.err.println("   Or check System Preferences (macOS)");
            System.err.println();
            
            System.exit(1);
        }
    }
}