"""ActionMapper — translates gesture event names to action names via config."""

from __future__ import annotations

from typing import Optional

from merlin.config import MerlinConfig


class ActionMapper:
    def __init__(self, config: MerlinConfig) -> None:
        self._mappings = dict(config.mappings)

    def map(self, gesture: str) -> Optional[str]:
        """Return the action name for a gesture, or None if unmapped."""
        return self._mappings.get(gesture)

    def reload(self, config: MerlinConfig) -> None:
        """Replace mappings from a new config (e.g. after user edits in UI)."""
        self._mappings = dict(config.mappings)