import aiohttp
import locale
from worthless import constants
from pathlib import Path
from worthless.classes import launcher


class Launcher:
    """
    Contains functions to get information from server and client like the official launcher.
    """

    def __init__(self, gamedir=Path.cwd()):
        """Initialize the launcher API

        Args:
            gamedir (Path): Path to the game directory.
        """
        self._api = constants.LAUNCHER_API_URL
        self._lang = self._get_system_language()
        if isinstance(gamedir, str):
            gamedir = Path(gamedir)
        self._gamedir = gamedir.resolve()

    @staticmethod
    async def _get(url, **kwargs) -> dict:
        # Workaround because miHoYo uses retcode for their API instead of HTTP status code
        async with aiohttp.ClientSession() as session:
            rsp = await session.get(url, **kwargs)
            rsp_json = await rsp.json()
            if rsp_json["retcode"] != 0:
                # TODO: Add more information to the error message
                raise aiohttp.ClientResponseError(code=rsp_json["retcode"],
                                                  message=rsp_json["message"],
                                                  history=rsp.history,
                                                  request_info=rsp.request_info)
            return rsp_json

    async def _get_launcher_info(self, adv=True) -> launcher.Info:
        params = {"key": "gcStgarh",
                  "filter_adv": str(adv).lower(),
                  "launcher_id": "10",
                  "language": self._lang}
        rsp = await self._get(self._api + "/content", params=params)
        if rsp["data"]["adv"] is None:
            params["language"] = "en-us"
            rsp = await self._get(self._api + "/content", params=params)
        lc_info = launcher.Info.from_dict(rsp["data"])
        return lc_info

    @staticmethod
    def _get_system_language() -> str:
        """Gets system language compatible with server parameters.

        Return:
             System language with format xx-xx.
        """

        try:
            lang = locale.getdefaultlocale()[0]
            lowercase_lang = lang.lower().replace("_", "-")
            return lowercase_lang
        except ValueError:
            return "en-us"

    async def override_gamedir(self, gamedir: str) -> None:
        """Overrides game directory with another directory.

        Args:
            gamedir (str): New directory to override with.
        """

        self._gamedir = Path(gamedir).resolve()

    async def override_language(self, language: str) -> None:
        """Overrides system detected language with another language.

        Args:
            language (str): Language to override with.
        """

        self._lang = language.lower().replace("_", "-")

    async def get_version_info(self) -> dict:
        """Gets version info from the server.

        This function gets version info including audio pack and their download url from the server.

        Returns:
            A dict containing version info from the server.
        Raises:
            aiohttp.ClientResponseError: An error occurred while fetching the information.
        """

        rsp = await self._get(self._api + "/resource", params={"key": "gcStgarh",
                                                               "launcher_id": "10"})
        return rsp

    async def get_launcher_info(self) -> launcher.Info:
        """Gets short launcher info from the server

        This function only gets background image and the FAQ url from the server.

        Returns:
            A dict containing short launcher info from the server.
        Raises:
            aiohttp.ClientResponseError: An error occurred while fetching the information.
        """

        return await self._get_launcher_info(adv=True)

    async def get_launcher_full_info(self) -> launcher.Info:
        """Gets full launcher info from the server.

        Returns:
            A dict containing full launcher info from the server.
        Raises:
            aiohttp.ClientResponseError: An error occurred while fetching the information.
        """

        return await self._get_launcher_info(adv=False)

    async def get_launcher_background_url(self) -> str:
        """Gets launcher background image url from the server.

        Returns:
            Background image url.
        Raises:
            aiohttp.ClientResponseError: An error occurred while fetching the background image.
        """

        rsp = await self.get_launcher_info()
        return rsp.background.background

    async def get_system_game_info(self, table_handle, keys, require_all_keys):
        # TODO: Implement
        raise NotImplementedError("Not implemented yet.")
        pass

    async def get_system_game_version(self) -> str:
        """Gets the game version from the current system.
        :return: str: System game version.
        """

        rsp = await self.get_version_info()
        return rsp["data"]["system"]["game_version"]