app/services/mode_controller.py

from app.contracts.dtos import ToggleModeResponse

class ModeToggleController:
    def __init__(self):
        # simple in-memory storage for MVP
        self._learner_modes = {} 

    def toggle_mode(self, learner_id: str, enabled: bool) -> ToggleModeResponse:
        self._learner_modes[learner_id] = enabled
        # In a real system, this would trigger UI events or update a persistent user profile
        return ToggleModeResponse(
            learner_id=learner_id,
            mode_active=enabled
        )