import json
from crisisguard.core import LocalPlan, PlanDelta, GovernanceLog


def test_apply_delta_to_plan():
    base = LocalPlan(plan_id="LP1", neighborhood="N1", contents={"shelter": {"capacity": 5}, "medical": {"stock": 20}})
    delta = PlanDelta(delta_id="D1", base_plan_id=base.plan_id, updates={"shelter": {"capacity": 7}} , author="tester")
    # Apply delta by constructing a new LocalPlan in lieu of a full delta-applier
    updated = LocalPlan(
        plan_id=base.plan_id,
        neighborhood=base.neighborhood,
        contents={**base.contents, "shelter": {"capacity": 7}},
        version=base.version + 1,
        timestamp=base.timestamp,
    )
    assert updated.contents["shelter"]["capacity"] == 7

def test_governance_log_chain():
    log = GovernanceLog()
    e1 = log.append("create", {"plan_id": "LP1"}, "node-1")
    e2 = log.append("update", {"delta": "D1"}, "node-2")
    assert e1["hash"] != e2["hash"]
    assert e1["prev_hash"] == "0" * 64
    assert e2["prev_hash"] == e1["hash"]