{"files":{"main.py":"from core import run\nfrom policy import POLICY\ndef evaluate(payload):\n    return run(payload, POLICY)\n","core.py":"from decimal import Decimal, ROUND_HALF_UP\n\n\ndef _cents(d):\n    return int((d * 100).quantize(Decimal(1), rounding=ROUND_HALF_UP))\n\n\ndef _one(inv, p):\n    if p['rounding'] == 'per_line':\n        principal = sum(_cents(Decimal(str(x))) for x in inv.get('lines', []))\n    else:\n        principal = _cents(sum((Decimal(str(x)) for x in inv.get('lines', [])), Decimal(0)))\n    fee = int(inv.get('fee_cents', 0))\n    charge = principal + fee\n    if charge < p['min_invoice_cents']:\n        return None\n    created = inv['created']\n    d = {}\n    for e in inv.get('events', []):\n        k = e['eid']\n        if k in d:\n            if p['duplicate_event'] == 'last':\n                d[k] = e\n        else:\n            d[k] = e\n    evs = list(d.values())\n    if p['refunds_first']:\n        evs = [e for e in evs if e['kind'] == 'refund'] + [e for e in evs if e['kind'] != 'refund']\n    active = True\n    tomb = False\n    refunded = 0\n    ceiling = principal + (fee if p['fee_refundable'] else 0)\n    for e in evs:\n        kind = e['kind']\n        if kind == 'void':\n            active = False\n            if p['void_is_tombstone']:\n                tomb = True\n        elif kind == 'restore':\n            if not active and not tomb:\n                active = True\n        elif kind == 'refund':\n            if not active:\n                continue\n            age = e['day'] - created\n            lim = p['max_refund_age_days']\n            if age < 0:\n                continue\n            if age > lim or (age == lim and not p['inclusive_limit']):\n                continue\n            amt = int(e['cents'])\n            rem = ceiling - refunded\n            if amt > rem:\n                if p['refund_overflow'] == 'cap':\n                    amt = rem\n                else:\n                    continue\n            refunded += amt\n    if not active:\n        st = 'void'\n    elif refunded == charge:\n        st = 'refunded'\n    else:\n        st = 'open'\n    st = st.upper() if p['status_case'] == 'upper' else st.lower()\n    return {'id': inv['id'], 'charge': charge, 'refunded': refunded,\n            'balance': charge - refunded, 'status': st, '_c': created}\n\n\ndef run(payload, policy):\n    if isinstance(payload, dict):\n        invs = payload.get('invoices') or []\n    else:\n        invs = payload or []\n    out = []\n    for inv in invs:\n        if inv.get('currency') != policy['currency']:\n            continue\n        r = _one(inv, policy)\n        if r is not None:\n            out.append(r)\n    if policy['order'] == 'created':\n        out.sort(key=lambda r: (r['_c'], r['id']))\n    else:\n        out.sort(key=lambda r: r['id'])\n    for r in out:\n        del r['_c']\n    return {'invoices': out}\n","policy.py":"POLICY = {\n    'duplicate_event': 'last',\n    'inclusive_limit': False,\n    'max_refund_age_days': 45,\n    'rounding': 'invoice',\n    'order': 'created',\n    'refund_overflow': 'reject',\n    'refunds_first': False,\n    'void_is_tombstone': False,\n    'min_invoice_cents': 25,\n    'status_case': 'upper',\n    'currency': 'CAD',\n    'fee_refundable': False,\n}\n","helpers.py":"# Optional pure helper functions.\n"}}