from pathlib import Path
from lxml import etree
from functools import cached_property
from arguments import ArgumentsParser
from typing import NamedTuple


class TriggerTuple(NamedTuple):
    name: str


class Config:
    def __init__(self, basepath: Path) -> None:
        self.basepath = basepath
        self.config = ArgumentsParser().parser.config
    
    @cached_property
    def root(self) -> etree.ElementTree:
        return etree.parse(self.basepath / self.config)
    
    @cached_property
    def app_root(self) -> etree.Element:
        return self.root.xpath('/cpuGovernorAutoAdjust').pop()
    
    @cached_property
    def loglevel(self) -> str:
        return self.app_root.xpath('logLevel').pop().text
    
    @cached_property
    def testmode(self) -> bool:
        value = self.app_root.xpath('testMode').pop().text.lower()
        if value not in ['true', 'false']:
            raise ValueError("testMode can only be 'true' or 'false")
        return True if value == 'true' else False
    
    @cached_property
    def triggertuples(self) -> list[TriggerTuple]:
        ret_val = []
        _triggers = self.app_root.xpath('triggers/trigger')
        for trigger in _triggers:
            name = trigger.xpath('name').pop().text
            ret_val.append(TriggerTuple(name=name))
        return ret_val