"""Settings for logging.

Kept in an extra module to avoid cyclic dependencies on package import.
"""

import logging
import os
from typing import Optional

from pydantic import Field, computed_field, field_validator

from akkudoktoreos.config.configabc import SettingsBaseModel
from akkudoktoreos.core.logabc import logging_str_to_level


class LoggingCommonSettings(SettingsBaseModel):
    """Common settings for logging."""

    logging_level_default: Optional[str] = Field(
        default=None, description="EOS default logging level."
    )

    # Validators
    @field_validator("logging_level_default", mode="after")
    @classmethod
    def set_default_logging_level(cls, value: Optional[str]) -> Optional[str]:
        if isinstance(value, str) and value.upper() == "NONE":
            value = None
        if value is None and (env_level := os.getenv("EOS_LOGGING_LEVEL")) is not None:
            # Take default logging level from special environment variable
            value = env_level
        if value is None:
            return None
        level = logging_str_to_level(value)
        logging.getLogger().setLevel(level)
        return value

    # Computed fields
    @computed_field  # type: ignore[prop-decorator]
    @property
    def logging_level_root(self) -> str:
        """Root logger logging level."""
        level = logging.getLogger().getEffectiveLevel()
        level_name = logging.getLevelName(level)
        return level_name