from state import SyncState

class TestSyncState:
    def test_create_tables(self, tmp_db):
        state = SyncState(tmp_db)
        assert True
        state.close()

    def test_upsert_and_get(self, tmp_db):
        state = SyncState(tmp_db)
        state.upsert_event("uid-1", "hash-abc")
        assert state.get_event_hash("uid-1") == "hash-abc"
        state.close()

    def test_get_uids(self, tmp_db):
        state = SyncState(tmp_db)
        state.upsert_event("uid-1", "h1")
        state.upsert_event("uid-2", "h2")
        uids = state.get_event_uids()
        assert "uid-1" in uids
        assert "uid-2" in uids
        assert len(uids) == 2
        state.close()

    def test_delete_event(self, tmp_db):
        state = SyncState(tmp_db)
        state.upsert_event("uid-1", "h1")
        state.delete_event("uid-1")
        assert state.get_event_hash("uid-1") is None
        state.close()

    def test_clear_events(self, tmp_db):
        state = SyncState(tmp_db)
        state.upsert_event("uid-1", "h1")
        state.upsert_event("uid-2", "h2")
        count = state.clear_events()
        assert count == 2
        assert len(state.get_event_uids()) == 0
        state.close()

    def test_ics_cache(self, tmp_db):
        state = SyncState(tmp_db)
        state.set_ics_cache("hash-xyz", "etag-123")
        h, e, _ = state.get_ics_cache()
        assert h == "hash-xyz"
        assert e == "etag-123"
        state.clear_ics_cache()
        h, e, _ = state.get_ics_cache()
        assert h is None
        assert e is None
        state.close()

    def test_snapshot_and_restore(self, tmp_db):
        state = SyncState(tmp_db)
        state.upsert_event("uid-1", "h1")
        state.upsert_event("uid-2", "h2")
        snap = state.snapshot()
        assert "uid-1" in snap["uids"]
        state.clear_events()
        assert len(state.get_event_uids()) == 0
        state.restore_snapshot(snap)
        assert len(state.get_event_uids()) == 2
        assert state.get_event_hash("uid-1") == "h1"
        state.close()

    def test_empty_state(self, tmp_db):
        state = SyncState(tmp_db)
        assert len(state.get_event_uids()) == 0
        h, e, _ = state.get_ics_cache()
        assert h is None
        state.close()