"""AI Behavior Drift Defense Layer.

Simulates agent misalignment and offers Ghostkey Shield recommendations.
"""
from __future__ import annotations

import random
from typing import Dict

from engine.ethical_growth_engine import ethics_passed


def simulate_behavior_drift(load_factor: float) -> dict:
    """Return drift probability info for ``load_factor`` in [0, 1]."""
    level = min(max(load_factor, 0.0), 1.0)
    prob = 0.1 + level * 0.8
    misaligned = random.random() < prob
    pattern = "spike" if level > 0.8 else "stable"
    return {"drift_detected": misaligned, "probability": round(prob, 2), "pattern": pattern}


def ghostkey_shield(user_id: str, load_factor: float) -> dict:
    """Return mitigation suggestions if the user passes ethics check."""
    if not ethics_passed(user_id):
        return {"status": "review"}
    analysis = simulate_behavior_drift(load_factor)
    recommendations = {
        "governance_escalation": "activate oversight board",
        "signal_buffer": "apply short cooldown",
        "pattern_analytics": analysis["pattern"],
        "reinforcement_dampening": round(1.0 - load_factor * 0.5, 3),
    }
    return {"analysis": analysis, "recommendations": recommendations}


__all__ = ["simulate_behavior_drift", "ghostkey_shield"]
