import importlib
from typing import Any
from typing import TYPE_CHECKING

from tunebot.plugins import PluginInstance
from tunebot.plugins.exceptions import PluginInitFailed

if TYPE_CHECKING:
    from tunebot import BasePluginInstance
    from tunebot import ServiceBase
    from bot import TuneBot

AnyDict = dict[Any, Any]


class FileSystemPluginLoader:
    def __init__(self, bot: "TuneBot") -> None:
        self.bot = bot

    def load_plugin(self, plug_conf: AnyDict) -> "BasePluginInstance":
        """
        Loads a plugin from configuration and returns a sequence of Services

        Raises:
            PluginInitFailed: [description]

        Returns:
            tuple[list["ServiceBase"], list[str]]: [description]
        """
        services: list["ServiceBase"] = []
        for service_location in plug_conf["services"]:
            module = importlib.import_module(service_location)

            if not hasattr(module, "setup"):
                raise PluginInitFailed('Failed to find setup() for "{location}"')

            services.append(module.setup(self.bot, plug_conf))

        return PluginInstance(plug_conf["config"], services, plug_conf["cogs"])


__all__ = ("FileSystemPluginLoader",)