{
  "files": {
    "main.py": "from core import run\nfrom policy import POLICY\n\n\ndef evaluate(payload):\n    return run(payload, POLICY)\n",
    "policy.py": "POLICY = {\n    \"timezone\": \"America/New_York\",\n    \"cutoff_hour\": 17,\n    \"cutoff_inclusive\": True,\n    \"lead_minutes\": 30,\n    \"adjacency_allowed\": True,\n    \"duration_max\": 120,\n    \"duplicate_policy\": \"first\",\n    \"cancelled_blocks\": True,\n    \"blackout_day\": \"2026-11-01\",\n    \"priority_high_first\": True,\n    \"capacity\": 1,\n    \"report_order\": \"id\",\n}\n",
    "helpers.py": "from datetime import datetime, timezone\n\n\ndef parse_utc(value):\n    if not isinstance(value, str):\n        raise ValueError(\"Expected an offset-aware ISO datetime\")\n    parsed = datetime.fromisoformat(value)\n    if parsed.tzinfo is None or parsed.utcoffset() is None:\n        raise ValueError(\"Expected an offset-aware ISO datetime\")\n    return parsed.astimezone(timezone.utc)\n\n\ndef overlaps(start, end, other_start, other_end, adjacency_allowed):\n    if adjacency_allowed:\n        return start < other_end and other_start < end\n    return start <= other_end and other_start <= end\n",
    "core.py": "from datetime import datetime, time, timedelta, timezone\nfrom math import isfinite\nfrom zoneinfo import ZoneInfo\n\nfrom helpers import overlaps, parse_utc\n\n\ndef run(payload, policy):\n    zone = ZoneInfo(policy[\"timezone\"])\n    earliest = parse_utc(payload[\"now\"]) + timedelta(minutes=policy[\"lead_minutes\"])\n\n    retained = {}\n    for index, row in enumerate(payload[\"appointments\"]):\n        identifier = row[\"id\"]\n        if identifier not in retained or policy[\"duplicate_policy\"] == \"last\":\n            retained[identifier] = (index, row)\n\n    results = {\"selected\": [], \"blocked\": [], \"rejected\": []}\n    candidates = []\n    for identifier, (index, row) in retained.items():\n        try:\n            duration = row[\"duration\"]\n            if isinstance(duration, bool) or not isinstance(duration, (int, float)):\n                raise ValueError(\"Invalid duration\")\n            if not 0 < duration <= policy[\"duration_max\"] or not isfinite(duration):\n                raise ValueError(\"Invalid duration\")\n            priority = row[\"priority\"]\n            if type(priority) is not int:\n                raise ValueError(\"Invalid priority\")\n            cancelled = row[\"cancelled\"]\n            if type(cancelled) is not bool:\n                raise ValueError(\"Invalid cancellation flag\")\n            if cancelled and not policy[\"cancelled_blocks\"]:\n                raise ValueError(\"Cancelled\")\n\n            start = parse_utc(row[\"start\"])\n            end = start + timedelta(minutes=duration)\n            if start < earliest:\n                raise ValueError(\"Insufficient lead time\")\n            local_day = start.astimezone(zone).date()\n            if local_day.isoformat() == policy[\"blackout_day\"]:\n                raise ValueError(\"Blackout day\")\n            cutoff = datetime.combine(\n                local_day, time(hour=policy[\"cutoff_hour\"]), tzinfo=zone\n            ).astimezone(timezone.utc)\n            if policy[\"cutoff_inclusive\"]:\n                if end > cutoff:\n                    raise ValueError(\"After cutoff\")\n            elif end >= cutoff:\n                raise ValueError(\"At or after cutoff\")\n        except (KeyError, TypeError, ValueError, OverflowError):\n            results[\"rejected\"].append((identifier, index))\n            continue\n\n        candidates.append((priority, index, identifier, start, end, cancelled))\n\n    candidates.sort(key=lambda item: (\n        -item[0] if policy[\"priority_high_first\"] else item[0], item[1]\n    ))\n    accepted = []\n    for priority, index, identifier, start, end, cancelled in candidates:\n        intersections = sum(\n            overlaps(start, end, other_start, other_end, policy[\"adjacency_allowed\"])\n            for other_start, other_end in accepted\n        )\n        if intersections >= policy[\"capacity\"]:\n            results[\"rejected\"].append((identifier, index))\n            continue\n        accepted.append((start, end))\n        category = \"blocked\" if cancelled else \"selected\"\n        results[category].append((identifier, index))\n\n    order_key = (lambda item: item[0]) if policy[\"report_order\"] == \"id\" else (lambda item: item[1])\n    return {\n        category: [identifier for identifier, index in sorted(entries, key=order_key)]\n        for category, entries in results.items()\n    }\n"
  }
}