"""Integration: the librarian's simple result cache.

A repeat of the same query (normalised) returns stored hits and skips the whole
Crossref + DB scan. Nothing fancy: whitespace/case-insensitive exact match,
disk-backed, TTL'd, size-bounded, deep/shallow kept separate.
"""
import sys
import types

import pytest

if "habanero" not in sys.modules:
    _habanero = types.ModuleType("habanero")
    _habanero.Crossref = object
    sys.modules["habanero"] = _habanero

import conjurer_librarian as lib  # noqa: E402
from durable_queue import DiskQueue  # noqa: E402


@pytest.fixture
def cache(tmp_path, monkeypatch):
    box = DiskQueue(str(tmp_path / "cache"))
    monkeypatch.setattr(lib, "_cache", box)
    monkeypatch.setattr(lib, "CACHE_TTL_SECONDS", 3600)
    monkeypatch.setattr(lib, "CACHE_MAX_ENTRIES", 500)
    return box


_HITS = {"10.1000/x": {"Title": ["A Paper"], "type": "journal-article"}}


def test_put_then_get_is_a_hit(cache):
    lib._cache_put("kwas foliowy", False, _HITS)
    assert lib._cache_get("kwas foliowy", False) == _HITS


def test_different_query_misses(cache):
    lib._cache_put("kwas foliowy", False, _HITS)
    assert lib._cache_get("witamina c", False) is None


def test_normalised_case_and_whitespace_hit_same_entry(cache):
    lib._cache_put("  Kwas   Foliowy ", False, _HITS)
    assert lib._cache_get("kwas foliowy", False) == _HITS


def test_deep_and_shallow_are_cached_separately(cache):
    lib._cache_put("q", False, _HITS)
    assert lib._cache_get("q", True) is None       # a deep search is a different key
    assert lib._cache_get("q", False) == _HITS


def test_expired_entry_is_a_miss(cache):
    cache.put(lib._cache_key("q", False), {"query": "q", "final_result": _HITS, "expires": 0})
    assert lib._cache_get("q", False) is None


def test_ttl_zero_disables_the_cache(cache, monkeypatch):
    monkeypatch.setattr(lib, "CACHE_TTL_SECONDS", 0)
    lib._cache_put("q", False, _HITS)     # no-op when disabled
    assert len(cache) == 0
    assert lib._cache_get("q", False) is None


def test_prune_bounds_the_cache(cache, monkeypatch):
    monkeypatch.setattr(lib, "CACHE_MAX_ENTRIES", 3)
    for i in range(6):
        lib._cache_put(f"query-{i}", False, _HITS)
    assert len(cache) <= 3