from idea194_attractorforge_verified_attractor.models import BasinSketch


def test_basin_sketch_compact_payload_is_bounded_and_deterministic() -> None:
    sketch = BasinSketch(
        attractor_id="demo-1",
        kind="motion_manifold",
        estimated_basin_radius=1.23456789,
        convergence_rate_bound=0.3456789,
        controller_hash="deadbeef" * 8,
        attractor_fingerprint="f" * 64,
        dt=0.1,
    )

    p1 = sketch.compact_payload()
    p2 = sketch.compact_payload()

    # deterministic
    assert p1 == p2

    # size bound: either the inline JSON (<=128) or the 64-char hex digest
    assert len(p1) <= 128

    # if JSON fits, it must start with a brace
    if p1.startswith(b"{"):
        assert b'"id":"demo-1"' in p1