from pathlib import Path

from pydantic import field_validator
from pydantic_settings import BaseSettings, SettingsConfigDict

BASE_DIR = Path(__file__).resolve().parent.parent


class Settings(BaseSettings):
    model_config = SettingsConfigDict(
        env_file=BASE_DIR / ".env",
        env_file_encoding="utf-8",
        extra="ignore",
    )

    bot_token: str
    # Same API the web cabinet uses (bot no longer opens SQLite).
    api_base_url: str = "http://127.0.0.1:51291"
    api_token: str
    # Example for Docker → host Xray: socks5://127.0.0.1:10808
    proxy_url: str | None = None

    @field_validator("proxy_url", mode="before")
    @classmethod
    def empty_proxy_as_none(cls, value: object) -> object:
        if value is None:
            return None
        if isinstance(value, str) and not value.strip():
            return None
        return value

    @field_validator("api_token", mode="before")
    @classmethod
    def require_api_token(cls, value: object) -> object:
        if value is None or (isinstance(value, str) and not value.strip()):
            raise ValueError(
                "API_TOKEN is required: bot authenticates to the API with it"
            )
        return value

    @field_validator("api_base_url")
    @classmethod
    def normalize_base_url(cls, value: str) -> str:
        return value.rstrip("/")


settings = Settings()