from __future__ import annotations

import pytest

from teamlandkarte_mcp.cache.search_cache import SearchCache


def test_cache_diagnostics_has_instance_id_and_ttl() -> None:
    cache = SearchCache(ttl_minutes=1, max_size=2, enable_diagnostics=True)
    diag = cache.diagnostics()
    assert isinstance(diag["instance_id"], str)
    assert diag["ttl_seconds"] == 60
    assert diag["max_size"] == 2
    assert diag["size"] == 0


def test_ttl_like_miss_leads_to_none() -> None:
    cache = SearchCache(ttl_minutes=1, max_size=10, enable_diagnostics=True)
    search_id = cache.store_search(
        task_id=None, requirements={}, results={"by_category": {}}
    )

    # Real-time TTL expiry would require sleeping > 60s. Instead, we assert
    # miss semantics by removing the entry and verifying get() returns None.
    cache._cache.pop(search_id, None)  # type: ignore[attr-defined]

    assert cache.get(search_id) is None


def test_max_size_eviction_can_remove_search_id() -> None:
    cache = SearchCache(ttl_minutes=60, max_size=1, enable_diagnostics=True)
    first = cache.store_search(
        task_id=None, requirements={}, results={"by_category": {}}
    )
    _ = cache.store_search(task_id=None, requirements={}, results={"by_category": {}})
    assert cache.get(first) is None


def test_add_filter_unknown_search_id_raises_keyerror() -> None:
    cache = SearchCache(ttl_minutes=60, max_size=10, enable_diagnostics=True)
    with pytest.raises(KeyError):
        cache.add_filter("does-not-exist", filtered_results={}, filter_meta={})
    diag = cache.diagnostics()
    assert diag["misses"] >= 0