"""Unified decision service -- shared between CLI and HTTP API."""
from models.decision import ListingDecision
from repositories.decision_repository import DecisionRepository

VALID_DECISIONS = {"liked", "disliked"}


def set_decision(
    repository: DecisionRepository,
    user_id: int,
    listing_id: int,
    listing_type: str,
    decision: str,
) -> ListingDecision:
    if decision not in VALID_DECISIONS:
        raise ValueError(
            f"Invalid decision '{decision}'. Must be one of: {VALID_DECISIONS}"
        )
    return repository.upsert_decision(
        user_id=user_id,
        listing_id=listing_id,
        listing_type=listing_type,
        decision=decision,
    )


def get_decisions(
    repository: DecisionRepository,
    user_id: int,
) -> list[ListingDecision]:
    return repository.get_decisions_for_user(user_id)


def clear_decision(
    repository: DecisionRepository,
    user_id: int,
    listing_id: int,
    listing_type: str,
) -> bool:
    return repository.delete_decision(
        user_id=user_id,
        listing_id=listing_id,
        listing_type=listing_type,
    )


def get_disliked_listing_ids(
    repository: DecisionRepository,
    user_id: int,
    listing_type: str,
) -> set[int]:
    return repository.get_disliked_listing_ids(
        user_id=user_id, listing_type=listing_type
    )