import copy
import json

from .utils import AttributedDict


class Config(AttributedDict):
    """
    Config class to manage the configuration of the games.

    The class has a few useful methods to load and save the config.
    """

    # convert dict to Config recursively
    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        for key, value in self.items():

            # Try to convert the value (the "metadata" field) to dict if applicable
            try:
                value = dict(eval(value))
            except Exception:
                pass

            if isinstance(value, dict):
                self[key] = init_config(value)  # convert dict to Config recursively
            # convert list of dict to list of Config recursively
            elif isinstance(value, list) and len(value) > 0:
                self[key] = [
                    init_config(item) if isinstance(item, dict) else item
                    for item in value
                ]

    def save(self, path: str):
        # save config to file
        with open(path, "w") as f:
            json.dump(self, f, indent=4)

    @classmethod
    def load(cls, path: str):
        # load config from file
        with open(path) as f:
            config = json.load(f)
        return cls(config)

    def deepcopy(self):
        # get the config class so that subclasses can be copied in the correct class
        config_class = self.__class__
        # make a deep copy of the config
        return config_class(copy.deepcopy(self))


class Configurable:
    """Configurable is an interface for classes that can be initialized with a config."""

    def __init__(self, **kwargs):
        self._config_dict = kwargs

    @classmethod
    def from_config(cls, config: Config):
        return cls(**config)

    def to_config(self) -> Config:
        # Convert the _config_dict to Config
        return Config(**self._config_dict)

    def save_config(self, path: str):
        self.to_config().save(path)


class EnvironmentConfig(Config):
    """EnvironmentConfig contains a env_type field to indicate the name of the environment."""

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        # check if the env_type field is specified
        if "env_type" not in self:
            raise ValueError("The env_type field is not specified")


class BackendConfig(Config):
    """BackendConfig contains a backend_type field to indicate the name of the backend."""

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        # check if the backend_type field is specified
        if "backend_type" not in self:
            raise ValueError("The backend_type field is not specified")


class AgentConfig(Config):
    """AgentConfig contains role_desc and backend fields."""

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        # check if the role_desc field is specified
        if "role_desc" not in self:
            raise ValueError("The role_desc field is not specified")
        # check if the backend field is specified
        if "backend" not in self:
            raise ValueError("The backend field is not specified")
        # Make sure the backend field is a BackendConfig
        if not isinstance(self["backend"], BackendConfig):
            raise ValueError("The backend field must be a BackendConfig")


class ArenaConfig(Config):
    """ArenaConfig contains a list of AgentConfig."""

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        # check if the players field is specified and it is List[AgentConfig]
        if "players" not in self:
            raise ValueError("The players field is not specified")
        if not isinstance(self["players"], list):
            raise ValueError("The players field must be a list")
        for player in self["players"]:
            if not isinstance(player, AgentConfig):
                raise ValueError("The players field must be a list of AgentConfig")

        # check if environment field is specified and it is EnvironmentConfig
        if "environment" not in self:
            raise ValueError("The environment field is not specified")
        if not isinstance(self["environment"], EnvironmentConfig):
            raise ValueError("The environment field must be an EnvironmentConfig")


# Initialize with different config class depending on whether the config is for environment or backend
def init_config(config: dict):
    if not isinstance(config, dict):
        raise ValueError("The config must be a dict")

    # check if the config is for environment or backend
    if "env_type" in config:
        return EnvironmentConfig(config)
    elif "backend_type" in config:
        return BackendConfig(config)
    elif "role_desc" in config:
        return AgentConfig(config)
    elif "players" in config:
        return ArenaConfig(config)
    else:
        return Config(config)