import time
import logging

# Configure logging
logging.basicConfig(level=logging.INFO, format='%(asctime)s - %(levelname)s - %(message)s')

# Example values, replace with actual system values
CPU_UTILIZATION_THRESHOLD_UP = 80
CPU_UTILIZATION_THRESHOLD_DOWN = 20
HYSTERESIS_WINDOW = 5  # seconds

class CPUFrequencyGovernor:
    def __init__(self):
        self.current_frequency = self.get_current_frequency()
        self.last_scaled_time = 0

    def get_current_frequency(self):
        # Replace with actual code to read CPU frequency
        return 1000  # Example frequency

    def set_frequency(self, frequency):
        # Replace with actual code to set CPU frequency
        logging.info(f"Setting CPU frequency to {frequency}")
        self.current_frequency = frequency

    def get_cpu_utilization(self):
        # Replace with actual code to get CPU utilization
        return 50  # Example utilization

    def scale_up(self):
        new_frequency = self.current_frequency * 1.2  # Example scaling
        logging.info(f"Scaling up CPU frequency from {self.current_frequency} to {new_frequency}")
        self.set_frequency(new_frequency)
        self.last_scaled_time = time.time()

    def scale_down(self):
        new_frequency = self.current_frequency * 0.8  # Example scaling
        logging.info(f"Scaling down CPU frequency from {self.current_frequency} to {new_frequency}")
        self.set_frequency(new_frequency)
        self.last_scaled_time = time.time()

    def govern(self):
        cpu_utilization = self.get_cpu_utilization()
        current_time = time.time()
        time_since_last_scale = current_time - self.last_scaled_time

        if cpu_utilization > CPU_UTILIZATION_THRESHOLD_UP:
            if time_since_last_scale > HYSTERESIS_WINDOW:
                logging.info(f"CPU utilization {cpu_utilization}% exceeds threshold {CPU_UTILIZATION_THRESHOLD_UP}%. Scaling up.")
                self.scale_up()
            else:
                remaining_time = HYSTERESIS_WINDOW - time_since_last_scale
                logging.info(f"Hysteresis prevents scaling up. Time remaining: {remaining_time:.2f} seconds.")
        elif cpu_utilization < CPU_UTILIZATION_THRESHOLD_DOWN:
            if time_since_last_scale > HYSTERESIS_WINDOW:
                logging.info(f"CPU utilization {cpu_utilization}% below threshold {CPU_UTILIZATION_THRESHOLD_DOWN}%. Scaling down.")
                self.scale_down()
            else:
                remaining_time = HYSTERESIS_WINDOW - time_since_last_scale
                logging.info(f"Hysteresis prevents scaling down. Time remaining: {remaining_time:.2f} seconds.")

        else:
            logging.debug(f"CPU utilization {cpu_utilization}% within acceptable range.")

if __name__ == '__main__':
    governor = CPUFrequencyGovernor()
    while True:
        governor.govern()
        time.sleep(1)