from medimesh.governance import GovernanceLedger, IdentityAuthority
from medimesh.sync import OfflineDeltaStore


def test_governance_chain_verifies_and_credentials_are_short_lived() -> None:
    authority = IdentityAuthority.create("tester")
    ledger = GovernanceLedger()
    ledger.append(authority, "site.registered", {"site_id": "hospital-a"})
    cred = ledger.issue_credential(authority, "did:medimesh:subject", ["read:inventory"], ttl_seconds=60)

    assert cred.is_valid()
    assert ledger.verify_chain({authority.did: authority})


def test_delta_sync_replay_is_deterministic() -> None:
    store = OfflineDeltaStore()
    store.append("hospital-a", "set", {"on_hand": 10}, "did:medimesh:test")
    store.append("hospital-a", "increment", {"on_hand": -3}, "did:medimesh:test")

    assert store.verify_chain("hospital-a")
    assert store.replay("hospital-a")["on_hand"] == 7