from __future__ import annotations

from typing import Dict

from .policies import PrioritizationPolicy


def compute_priority(
    predicted_utility: float,
    uncertainty: float,
    diversity_gain: float,
    cluster_bonus: float,
    policy: PrioritizationPolicy,
) -> float:
    """Weighted priority function used by adaptive queueing."""
    return (
        policy.utility_weight * predicted_utility
        + policy.uncertainty_weight * uncertainty
        + policy.diversity_weight * diversity_gain
        + policy.cluster_bonus_weight * cluster_bonus
    )


def cluster_bonus(cluster_load: Dict[int, int], cluster_id: int) -> float:
    load = cluster_load.get(cluster_id, 0)
    return 1.0 / (1.0 + float(load))