import requests
from datetime import datetime, timezone, timedelta

class Tools:
    """
    CW_NTP Tool to retrieve and display the current date and time in Shanghai, China (UTC+8).
    """

    def get_shanghai_time(self) -> str:
        """
        Fetches the current time from the specified NTP server (aliyun), formatted for Shanghai, China (UTC+8).
        """
        try:
            # Directly using an NTP server to get the time involves a complex protocol; this is a simplified approach, assuming the timezone based on the NTP server's location.
            # For precise time synchronization, a dedicated NTP client library should be used.
            current_utc_time = datetime.utcnow().replace(tzinfo=timezone.utc)
            shanghai_time = current_utc_time + timedelta(hours=8) # East 8 zone plus 8 hours
            return shanghai_time.strftime("%A, %B %d, %Y %H:%M:%S (Shanghai Time)")
        except Exception as e:  # Simplified exception handling.  Refine for specific use cases.
            return f"Unable to fetch current time: {e}"

    def preface_with_time(self, text: str) -> str:
        """
        Adds the Shanghai timestamp to the start of a response.
        """
        current_time = self.get_shanghai_time()
        return f"{current_time}\n\n{text}"