import os
import platform
import time
from argparse import Namespace
from configparser import ConfigParser
from logging import getLogger
from typing import Union, Iterator

from PyQt5.QtCore import pyqtSignal, QObject

import rare.utils.wine as wine
from rare.lgndr.core import LegendaryCore
from rare.models.game import RareGame
from rare.models.pathspec import PathSpec
from rare.utils.misc import path_size, format_size
from .fetch import FetchWorker
from .worker import Worker

if platform.system() == "Windows":
    # noinspection PyUnresolvedReferences
    import winreg # pylint: disable=E0401
    from legendary.lfs import windows_helpers

logger = getLogger("WineResolver")


class WineResolver(Worker):
    class Signals(QObject):
        result_ready = pyqtSignal(str)

    def __init__(self, core: LegendaryCore, path: str, app_name: str):
        super(WineResolver, self).__init__()
        self.signals = WineResolver.Signals()
        self.wine_env = wine.environ(core, app_name)
        self.wine_exec = wine.wine(core, app_name)
        self.path = PathSpec(core, app_name).cook(path)

    def run_real(self):
        if "WINEPREFIX" not in self.wine_env or not os.path.exists(self.wine_env["WINEPREFIX"]):
            # pylint: disable=E1136
            self.signals.result_ready[str].emit("")
            return
        if not os.path.exists(self.wine_exec) or not os.path.exists(wine.winepath(self.wine_exec)):
            # pylint: disable=E1136
            self.signals.result_ready[str].emit("")
            return
        path = wine.resolve_path(self.wine_exec, self.wine_env, self.path)
        # Clean wine output
        real_path = wine.convert_to_unix_path(self.wine_exec, self.wine_env, path)
        # pylint: disable=E1136
        self.signals.result_ready[str].emit(real_path)
        return


class OriginWineWorker(FetchWorker):
    def __init__(self, core: LegendaryCore, args: Namespace, games: Union[Iterator[RareGame], RareGame]):
        super(OriginWineWorker, self).__init__(core, args)
        self.__cache: dict[str, ConfigParser] = {}
        if isinstance(games, RareGame):
            games = [games]
        self.games = games

    def run_real(self) -> None:
        t = time.time()
        for rgame in self.games:
            if not rgame.is_origin:
                continue

            reg_path: str = rgame.game.metadata \
                .get("customAttributes", {}) \
                .get("RegistryPath", {}).get("value", None)
            if not reg_path:
                continue

            reg_key: str = rgame.game.metadata \
                .get("customAttributes", {}) \
                .get("RegistryKey", {}).get("value", None)

            if platform.system() == "Windows":
                install_dir = windows_helpers.query_registry_value(winreg.HKEY_LOCAL_MACHINE, reg_path, reg_key)
            else:
                wine_env = wine.environ(self.core, rgame.app_name)
                wine_exec = wine.wine(self.core, rgame.app_name)

                # lk: this is the original way of gettijng the path by parsing "system.reg"
                wine_prefix = wine.prefix(self.core, rgame.app_name)
                reg = self.__cache.get(wine_prefix, None) or wine.read_registry("system.reg", wine_prefix)
                self.__cache[wine_prefix] = reg

                reg_path = reg_path.replace("SOFTWARE", "Software").replace("WOW6432Node", "Wow6432Node")
                # lk: split and rejoin the registry path to avoid slash expansion
                reg_path = "\\\\".join([x for x in reg_path.split("\\") if bool(x)])

                install_dir = reg.get(reg_path, f'"{reg_key}"', fallback=None)

                # lk: this is the alternative way of getting the path by using wine itself
                # install_dir = wine.query_reg_key(wine_exec, wine_env, f"HKLM\\{reg_path}", reg_key)

                if install_dir:
                    install_dir = wine.convert_to_unix_path(wine_exec, wine_env, install_dir)

            if install_dir:
                if os.path.isdir(install_dir):
                    size = path_size(install_dir)
                    rgame.set_origin_attributes(install_dir, size)
                    logger.debug(f"Found Origin game {rgame.title} ({install_dir}, {format_size(size)})")
                else:
                    logger.warning(f"Found Origin game {rgame.title} ({install_dir} does not exist)")
        self.signals.result.emit((), FetchWorker.Result.ORIGIN)
        logger.info(f"Origin registry worker finished in {time.time() - t}s")