src/simulation/policies/age.py

"""Age-based scheduling policy.

Prioritizes older cases to reduce maximum age and prevent starvation.
Uses case age (days since filing) as primary criterion.
"""

from __future__ import annotations

from datetime import date
from typing import List

from src.core.case import Case
from src.core.policy import SchedulerPolicy


class AgeBasedPolicy(SchedulerPolicy):
    """Age-based scheduling: oldest cases scheduled first."""

    def prioritize(self, cases: List[Case], current_date: date) -> List[Case]:
        """Sort cases by age (oldest first).

        Args:
            cases: List of eligible cases
            current_date: Current simulation date

        Returns:
            Cases sorted by age_days (descending)
        """
        # Update ages first
        for c in cases:
            c.update_age(current_date)

        return sorted(cases, key=lambda c: c.age_days, reverse=True)

    def get_name(self) -> str:
        return "Age-Based"

    def requires_readiness_score(self) -> bool:
        return False