{"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\nfrom helpers import to_cents, dedupe_events\n\n\ndef _invoices_of(payload):\n    if payload is None:\n        return []\n    if isinstance(payload, dict):\n        return payload.get('invoices') or []\n    return list(payload)\n\n\ndef run(payload, policy):\n    out = []\n    for inv in _invoices_of(payload):\n        if inv.get('currency') != policy['currency']:\n            continue\n        lines = [Decimal(str(x)) for x in inv.get('lines', [])]\n        cents_per = Decimal(100)\n        if policy['rounding'] == 'per_line':\n            principal = sum((to_cents(x) for x in lines), 0)\n        else:\n            principal = to_cents(sum(lines, Decimal(0)))\n        fee = int(inv.get('fee_cents', 0))\n        charge = principal + fee\n        if charge < policy['min_invoice_cents']:\n            continue\n        created = inv['created']\n        events = dedupe_events(inv.get('events', []), policy['duplicate_event'])\n        if policy['refunds_first']:\n            events = [e for e in events if e.get('kind') == 'refund'] + [e for e in events if e.get('kind') != 'refund']\n        ceiling = principal + fee if policy['fee_refundable'] else principal\n        active = True\n        dead = False\n        refunded = 0\n        for e in events:\n            kind = e.get('kind')\n            if kind == 'void':\n                active = False\n                if policy['void_is_tombstone']:\n                    dead = True\n            elif kind == 'restore':\n                if not dead:\n                    active = True\n            elif kind == 'refund':\n                if not active:\n                    continue\n                age = e['day'] - created\n                limit = policy['max_refund_age_days']\n                ok = age >= 0 and (age <= limit if policy['inclusive_limit'] else age < limit)\n                if not ok:\n                    continue\n                c = int(e['cents'])\n                if refunded + c <= ceiling:\n                    refunded += c\n                elif policy['refund_overflow'] == 'cap':\n                    refunded = ceiling\n        if not active:\n            status = 'void'\n        elif refunded == charge:\n            status = 'refunded'\n        else:\n            status = 'open'\n        if policy['status_case'] == 'upper':\n            status = status.upper()\n        out.append({'id': inv['id'], 'charge': charge, 'refunded': refunded,\n                    'balance': charge - refunded, 'status': status, '_c': created})\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    'currency': 'CAD',\n    'rounding': 'invoice',\n    'min_invoice_cents': 25,\n    'duplicate_event': 'last',\n    'refunds_first': False,\n    'void_is_tombstone': False,\n    'max_refund_age_days': 45,\n    'inclusive_limit': False,\n    'fee_refundable': False,\n    'refund_overflow': 'reject',\n    'status_case': 'upper',\n    'order': 'created',\n}\n","helpers.py":"from decimal import Decimal, ROUND_HALF_UP\n\n\ndef to_cents(d):\n    return int((Decimal(d) * 100).quantize(Decimal(1), rounding=ROUND_HALF_UP))\n\n\ndef dedupe_events(events, mode):\n    d = {}\n    for e in events:\n        k = e.get('eid')\n        if k in d:\n            if mode == 'last':\n                d[k] = e\n        else:\n            d[k] = e\n    return list(d.values())\n"}}