from app_class import AppClass
from config import Config
from cpufreq import cpuFreq
from functools import cached_property


class Governor(AppClass):
    def __init__(self, _config: Config) -> None:
        super().__init__(_config)

    @cached_property
    def _cpufreq(self) -> cpuFreq:
        return cpuFreq()
    
    def set_governor(self, governor_name: str) -> None:
        self.log.debug(
            "setting cpu governor to %s by using command self._cpufreq.set_governors(%s)", 
            governor_name, governor_name
        )
        
        if self._config.testmode:
            self.log.warning("application is running in testmode, cpu governor not set")
            return None
        
        if governor_name not in self._cpufreq.available_governors:
            self.log.error("governor %s not supported by cpu", governor_name)
            return None
        
        self._cpufreq.set_governors(governor_name)