import os
import sys

# Ensure tests can import the src package layout when running from repo root
ROOT = os.path.abspath(os.path.join(os.path.dirname(__file__), ".."))
SRC = os.path.join(ROOT, "src")
sys.path.insert(0, SRC)

from idea168_crisispulse_federated_resource.core.ledger import LocalLedger


def test_ledger_add_and_snapshot_and_merkle():
    ledger = LocalLedger()
    ledger.add_entry("camp1", {"resources": {"energy": 100}})
    ledger.add_entry("camp2", {"resources": {"water": 200}})
    snap = ledger.snapshot()
    assert "camp1" in snap and "camp2" in snap
    root = ledger.merkle_root()
    assert isinstance(root, str) and len(root) == 64

def test_ledger_apply_delta():
    ledger = LocalLedger()
    ledger.add_entry("camp1", {"resources": {"energy": 50}})
    delta = {
        "entry_id": "camp1",
        "changes": {"resources": {"energy": 75}},
        "tags": ["test"],
        "signature": "signature-placeholder",
    }
    ledger.apply_delta(delta)
    entry = ledger.get_entry("camp1")
    assert entry is not None
    assert entry["data"]["resources"]["energy"] == 75