from datetime import datetime, timedelta
import pandas as pd
from modules.simulator import simulate_data

class DataScheduler:
    def __init__(self):
        self.last_update = datetime.now() - timedelta(hours=7)  # Force initial update
        self.data = None

    def get_latest_data(self, num_poles, faults):
        current_time = datetime.now()
        # Update data every 6 hours
        if current_time >= self.last_update + timedelta(hours=6):
            self.data = simulate_data(num_poles, faults)
            self.last_update = current_time
        return self.data, self.last_update

# Singleton instance
scheduler = DataScheduler()

def get_latest_data(num_poles, faults):
    return scheduler.get_latest_data(num_poles, faults)