# -*- coding: utf-8 -*-

import re, sys
from argparse import ArgumentParser

from ..App import App
from .Cmd import Cmd as CmdBase

class CmdDistro(CmdBase): # export

    def __init__(self, parent: App) -> None:
        self.__id = None
        super().__init__(parent, 'distro', help="System package manager wrapper")
        self._add_subcommands()
        self.__interactive: bool|None = None

    @property
    def distro_id(self):
        if self.__id is None:
            if self.app.args.id is not None:
                self.__id = self.app.args.id
            else:
                os_release = '/etc/os-release'
                with open(os_release, 'r') as file:
                    matches = re.findall(r'^ID="?([^"]+)"?$', file.read(), re.MULTILINE)
                    if len(matches) != 1:
                        raise Exception(f'Could not read "ID=" from "{os_release}"')
                    self.__id = matches[0]
        return self.__id

    def add_arguments(self, p: ArgumentParser) -> None:
        super().add_arguments(p)
        p.add_argument('--id', default=None, help='Distribution ID (default is taken from /etc/os-release)')
        p.add_argument('--interactive', choices=['true', 'false', 'auto'], default='false', help="Wait for user input or try to proceed unattended")

    @property
    def interactive(self) -> bool:
        if self.__interactive is None:
            match self.app.args.interactive:
                case 'true':
                    self.__interactive = True
                case 'false':
                    self.__interactive = False
                case 'auto':
                    self.__interactive = sys.stdin.isatty()
        return self.__interactive

    async def _run(self, args):
        raise Exception("Running with args", args)