#!/usr/bin/env python3
"""
CyberSim OS - Standalone Offline Local Launcher
Zero external dependencies. Binds strictly to 127.0.0.1 and opens default browser.
"""

import os
import sys
import http.server
import socketserver
import webbrowser
import threading
import time

PORT = 8080
HOST = '127.0.0.1'

class CustomHandler(http.server.SimpleHTTPRequestHandler):
    def __init__(self, *args, **kwargs):
        src_dir = os.path.join(os.path.dirname(os.path.abspath(__file__)), 'src')
        super().__init__(*args, directory=src_dir, **kwargs)

    def log_message(self, format, *args):
        pass

def start_server():
    server = None
    for port in range(PORT, PORT + 20):
        try:
            server = socketserver.TCPServer((HOST, port), CustomHandler)
            print(f"============================================================")
            print(f"  CyberSim OS - Offline Simulation Environment")
            print(f"  Running locally at: http://{HOST}:{port}")
            print(f"  Press Ctrl+C to stop the launcher")
            print(f"============================================================")

            def open_browser():
                time.sleep(0.6)
                webbrowser.open(f"http://{HOST}:{port}")

            threading.Thread(target=open_browser, daemon=True).start()
            server.serve_forever()
            break
        except OSError:
            continue

if __name__ == '__main__':
    try:
        start_server()
    except KeyboardInterrupt:
        print("\nCyberSim OS stopped.")
        sys.exit(0)