import secrets
from gravityweave.plan_delta import PlanDelta
from gravityweave.delta_synopsis import build_synopsis, build_priority_key, serialize_synopsis, deserialize_synopsis


def test_priority_key_bounds():
    k = build_priority_key(3, 12)
    assert isinstance(k, int)
    assert k == (3 << 4) | 12


def test_build_and_serialize_synopsis():
    key = secrets.token_bytes(16)
    p = PlanDelta(origin="nodeX")
    p.commitments.add({"type": "burn", "fuel": 2.0})
    p.priority.write(7)

    syn = build_synopsis(p, parent_version="v0", urgency_score=2, impact_score=8,
                         affected_assets=["sat1", "relayA"], signer="nodeX", key=key)

    assert syn["parent_version"] == "v0"
    assert syn["priority_key"] == (2 << 4) | 8
    assert syn["size_estimate"] > 0
    assert syn["summary_hash"]
    assert syn["short_sig"]

    b = serialize_synopsis(syn)
    d = deserialize_synopsis(b)
    assert d["delta_id"] == syn["delta_id"]