from __future__ import annotations

import logging

from PySide6.QtCore import QSettings


class ApplicationSettings:
    """Typed access to persistent BEdit application settings."""

    LOG_LEVEL_KEY = "logging/level"
    DEFAULT_LOG_LEVEL = logging.INFO
    SNAP_TO_GRID_SIZE_KEY = "graph/snap_to_grid_size"
    DEFAULT_SNAP_TO_GRID_SIZE = 4
    LIBRARY_PATHS_KEY = "libraries/paths"

    def __init__(self, settings: QSettings | None = None) -> None:
        self._settings = settings if settings is not None else QSettings()

    @property
    def log_level(self) -> int:
        return self._settings.value(
            self.LOG_LEVEL_KEY,
            self.DEFAULT_LOG_LEVEL,
            type=int,
        )

    @log_level.setter
    def log_level(self, level: int) -> None:
        self._settings.setValue(self.LOG_LEVEL_KEY, level)

    @property
    def snap_to_grid_size(self) -> int:
        return max(1, self._settings.value(self.SNAP_TO_GRID_SIZE_KEY, self.DEFAULT_SNAP_TO_GRID_SIZE, type=int))

    @snap_to_grid_size.setter
    def snap_to_grid_size(self, size: int) -> None:
        if size < 1:
            raise ValueError("snap-to-grid size must be positive")
        self._settings.setValue(self.SNAP_TO_GRID_SIZE_KEY, size)

    @property
    def library_paths(self) -> list[str]:
        value = self._settings.value(self.LIBRARY_PATHS_KEY, [])
        if isinstance(value, str):
            return [value]
        return [str(path) for path in value] if isinstance(value, (list, tuple)) else []

    @library_paths.setter
    def library_paths(self, paths: list[str]) -> None:
        self._settings.setValue(self.LIBRARY_PATHS_KEY, list(dict.fromkeys(paths)))

class SimulationApplicationSettings:
    """Typed access to persistent BEsim application settings."""

    LOG_LEVEL_KEY = "logging/level"
    DEFAULT_LOG_LEVEL = logging.INFO

    def __init__(self, settings: QSettings | None = None) -> None:
        self._settings = settings if settings is not None else QSettings()

    @property
    def log_level(self) -> int:
        return self._settings.value(
            self.LOG_LEVEL_KEY,
            self.DEFAULT_LOG_LEVEL,
            type=int,
        )

    @log_level.setter
    def log_level(self, level: int) -> None:
        self._settings.setValue(self.LOG_LEVEL_KEY, level)