import json
from idea44_soundgraph_studio_verifiable.core import AudioModule, AudioPatch, generate_ed25519_keypair, ProvenanceEvent


def test_audio_module_cid_is_stable():
    m = AudioModule.make("oscillator", {"freq": 440, "wave": "sine"}, version="0.1")
    cid1 = m.cid()
    # recompute from dict to ensure canonicalization is stable
    cid2 = AudioModule(id=m.id, type=m.type, params=m.params, version=m.version, license=m.license).cid()
    assert cid1 == cid2


def test_patch_merkle_and_inclusion_proof():
    m1 = AudioModule.make("oscillator", {"freq": 220})
    m2 = AudioModule.make("filter", {"type": "lowpass", "cutoff": 1000})

    node1 = {"id": "n1", "module_cid": m1.cid(), "params": {}}
    node2 = {"id": "n2", "module_cid": m2.cid(), "params": {}}

    patch = AudioPatch(nodes=[node1, node2], edges=[("n1","n2")])
    root = patch.merkle_root()
    assert isinstance(root, str) and len(root) == 64

    proof, leaf = patch.inclusion_proof_for_module_cid(m1.cid())
    # verify proof using the exported verification helper
    from idea44_soundgraph_studio_verifiable.core import verify_merkle_proof

    assert verify_merkle_proof(leaf, proof, root)


def test_provenance_event_sign_and_verify():
    sk, pk = generate_ed25519_keypair()
    ev = ProvenanceEvent(patch_id="patch-1", actor="alice", timestamp=123456.0, op_hash="deadbeef")
    ev.sign(sk)
    assert ev.verify(pk)