from tht.decisions import append_decision, list_decisions


def test_decision_retracted_in_audit_but_marked(tmp_path):
    """Una decisione ritirata resta nel log di audit (append-only) ma porta il marker."""
    session = tmp_path / "s1"
    session.mkdir()
    d1 = append_decision(
        session, type="table_promoted", subject="phase:4", detail="t1", rationale="r"
    )
    append_decision(
        session,
        type="decision_retracted",
        subject="phase:4",
        detail="wrong answer, retry",
        rationale="user picked back",
        retracts=d1.seq,
    )
    all_decisions = list_decisions(session)
    assert len(all_decisions) == 2  # entrambe nel log di audit
    assert all_decisions[0].seq == 1
    assert all_decisions[0].type == "table_promoted"
    assert all_decisions[1].seq == 2
    assert all_decisions[1].type == "decision_retracted"
    assert all_decisions[1].retracts == 1  # marker verso la decisione ritirata


def test_append_decision_assigns_monotonic_seq(tmp_path):
    session = tmp_path / "s2"
    session.mkdir()
    d1 = append_decision(session, type="phase_approved", subject="phase:1")
    d2 = append_decision(session, type="phase_approved", subject="phase:2")
    d3 = append_decision(session, type="question_rewritten", subject="phase:3", detail="new q")
    assert (d1.seq, d2.seq, d3.seq) == (1, 2, 3)
    assert d3.detail == "new q"
    # re-read from disk: seq preserved
    loaded = list_decisions(session)
    assert [d.seq for d in loaded] == [1, 2, 3]


def test_retracts_defaults_none(tmp_path):
    """Le decisioni normali hanno retracts=None (non serializzato come null rumoroso)."""
    session = tmp_path / "s3"
    session.mkdir()
    d = append_decision(session, type="concept_clarified", subject="phase:1", detail="x")
    assert d.retracts is None
    # round-trip via JSON
    loaded = list_decisions(session)
    assert loaded[0].retracts is None


def test_empty_session_returns_empty_list(tmp_path):
    session = tmp_path / "empty"
    session.mkdir()
    assert list_decisions(session) == []


def test_decision_type_literal_includes_retracted():
    """decision_retracted e' un tipo valido (pydantic lo accetta)."""
    from tht.decisions import DecisionRecord
    from datetime import datetime, UTC
    d = DecisionRecord(
        seq=1, ts=datetime.now(UTC), type="decision_retracted",
        subject="phase:4", retracts=1,
    )
    assert d.type == "decision_retracted"