import pytest
from idea189_replicaweave_safe_mutation.crdt import Op, Delta
from idea189_replicaweave_safe_mutation.test_cartridge import built_in_cartridges
from idea189_replicaweave_safe_mutation.harness import run_cartridge
from idea189_replicaweave_safe_mutation.signer import generate_keypair, sign_bytes, verify_signature


def test_delta_merge_and_root():
    a1 = Op(timestamp=1, actor="A", idx=0, op_type="param-set", target="/svc/replicas", value=3)
    a2 = Op(timestamp=2, actor="A", idx=1, op_type="graft", target="/svc/new", value={"image": "v1"})
    b1 = Op(timestamp=2, actor="B", idx=0, op_type="param-set", target="/svc/replicas", value=4)

    d1 = Delta([a1, a2])
    d2 = Delta([b1])
    merged = d1.merge(d2)
    # merged should contain 3 ops
    assert len(merged.ops) == 3
    root = merged.ops_root()
    assert isinstance(root, str) and len(root) == 64


def test_harness_and_signing():
    # prepare a simple delta
    d = Delta()
    d.add_op(Op(timestamp=1, actor="A", idx=0, op_type="graft", target="/x", value=1))
    delta_payload = {"ops": d.to_list(), "ops_root": d.ops_root(), "parent_hash": None}

    cartridge = built_in_cartridges[0]  # network_partition
    priv, pub = generate_keypair()
    report, manifest = run_cartridge(cartridge, delta_payload, seed=42, signer_key=priv)
    assert hasattr(report, "passed")
    # signature present
    assert "signature" in manifest
    sig = bytes.fromhex(manifest["signature"])
    signed_payload = manifest.get("signed_payload")
    assert signed_payload is not None
    ok = verify_signature(pub, signed_payload.encode("utf-8"), sig)
    assert ok