# Copyright 2026 Guildhouse Dev
# SPDX-License-Identifier: Apache-2.0

"""In-memory cache of Intune device compliance state."""

import time
from typing import Optional

from gsap_broker.models.intune import ComplianceState


class DeviceComplianceCache:
    """In-memory cache with TTL for device compliance state."""

    def __init__(self, ttl_seconds: int = 300):
        self.ttl = ttl_seconds
        self._store: dict[str, tuple[ComplianceState, float]] = {}

    async def get(self, device_id: str) -> Optional[ComplianceState]:
        """Get cached compliance state, or None if expired/missing."""
        entry = self._store.get(device_id)
        if entry is None:
            return None
        state, stored_at = entry
        if (time.time() - stored_at) > self.ttl:
            del self._store[device_id]
            return None
        return state

    async def set(self, device_id: str, state: ComplianceState) -> None:
        """Cache a compliance state."""
        self._store[device_id] = (state, time.time())

    async def invalidate(self, device_id: str) -> None:
        """Remove a device from cache."""
        self._store.pop(device_id, None)

    def size(self) -> int:
        return len(self._store)