import time
from deltatrace.core import LocalEvent, PlanDelta, ReplayEngine


def test_replay_root_is_deterministic():
    d1 = PlanDelta(delta_id="d1", timestamp=1.0, author="alice", contract_id="c1", signature="sig1")
    d2 = PlanDelta(delta_id="d2", timestamp=2.0, author="bob", contract_id="c2", signature="sig2")
    events = [
        {"type": "order", "order_id": "o1", "ts": 1.5},
        {"type": "fill", "fill_id": "f1", "order_id": "o1", "ts": 1.7},
    ]
    engine = ReplayEngine([d1, d2], events)
    root1 = engine.compute_root()
    # Recompute should yield the same root
    engine2 = ReplayEngine([d1, d2], events)
    root2 = engine2.compute_root()
    assert root1 == root2


def test_path_length_and_structure():
    d = PlanDelta(delta_id="d", timestamp=0.1, author="a", contract_id="c", signature="sig")
    engine = ReplayEngine([d], [])
    path = engine.replay_path()
    assert isinstance(path, dict)
    assert "path" in path and isinstance(path["path"], list)
    assert "root" in path