import os
from functools import cached_property
from pydantic_settings import BaseSettings
from pydantic import computed_field


class Settings(BaseSettings):
    """
    Settings class that defines configuration variables for the application.

    Attributes:
    ----------
    app_env : str
        Specifies the environment in which the application is running.
        Default is 'DEV'. Possible values could include 'DEV', 'PROD'

    workers : int
        Defines the number of workers to be used in the application.
        Default is 1.

    api_id : int
        Represents the API ID from my.telegram.org

    api_hash : str
        The hash key corresponding to your API Hash from my.telegram.org

    bot_token : str
        The token from BotFather.

    storage : os.path
        Specifies the path where the application stores persistent data.

    allowed_ids : str
        A list or comma-separated string of IDs that are allowed access
        to the bot or application.

    log_level : str
        The log level used for logging module.

    Config:
    -------
    env_file : str
        Specifies the environment file to load the environment variables from.
        Default is ".env".
    """
    app_env: str = "DEV"
    workers: int = 1
    api_id: int
    api_hash: str
    bot_token: str
    storage: str
    allowed_ids: str
    log_level: str

    @computed_field
    @property
    def tt_hash_file(self) -> str:
        return os.path.join(settings.storage, "tt_hashes.pickle")

    @computed_field
    @cached_property
    def allowed_ids_list(self) -> list:
        allowed_ids = settings.allowed_ids.split(",")
        allowed_ids = [int(x) for x in allowed_ids]
        return allowed_ids

    class Config:
        env_file = ".env"


settings = Settings()