import re
from pathlib import Path
from configparser import ConfigParser
from worthless.launcher import Launcher


class Installer:
    def _read_version_from_config(self):
        if self._config_file.exists():
            raise FileNotFoundError(f"Config file {self._config_file} not found")
        cfg = ConfigParser()
        cfg.read(str(self._config_file))
        return cfg.get("miHoYo", "game_version")

    # https://gitlab.com/KRypt0n_/an-anime-game-launcher/-/blob/main/src/ts/Game.ts#L26
    def _read_version_from_game_file(self):
        globalgamemanagers = self._gamedir.joinpath("./GenshinImpact_Data/globalgamemanagers")
        if globalgamemanagers.exists():
            with globalgamemanagers.open("rb") as f:
                data = f.read().decode("ascii")
            result = re.search(r"([1-9]+\.[0-9]+\.[0-9]+)_[\d]+_[\d]+", data)
            if not result:
                raise ValueError("Could not find version in game file")
            return result.group(1)

    def __init__(self, gamedir: str | Path = Path.cwd(), overseas: bool = True):
        if isinstance(gamedir, str):
            gamedir = Path(gamedir)
        self._gamedir = gamedir
        config_file = self._gamedir.joinpath("config.ini")
        self._config_file = config_file.resolve()
        self._version = None
        self._overseas = overseas
        self._launcher = Launcher(self._gamedir, self._overseas)
        if config_file.exists():
            self._version = self._read_version_from_config()
        elif gamedir.joinpath("./GenshinImpact_Data/globalgamemanagers").exists():
            self._version = self._read_version_from_game_file()