{"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\": \"UTC\",\n    \"cutoff_hour\": 18,\n    \"cutoff_inclusive\": False,\n    \"lead_minutes\": 60,\n    \"adjacency_allowed\": False,\n    \"duration_max\": 90,\n    \"duplicate_policy\": \"last\",\n    \"cancelled_blocks\": False,\n    \"blackout_day\": \"2026-11-02\",\n    \"priority_high_first\": False,\n    \"capacity\": 2,\n    \"report_order\": \"input\",\n}\n","helpers.py":"from datetime import datetime, time, timedelta, timezone\nfrom math import isfinite\nfrom numbers import Real\n\n\nUTC = timezone.utc\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[:-1] + \"+00:00\" if value.endswith(\"Z\") else value)\n    if parsed.tzinfo is None or parsed.utcoffset() is None:\n        raise ValueError(\"Datetime must have an offset\")\n    return parsed.astimezone(UTC)\n\n\ndef validate_interval(row, earliest, zone, policy):\n    duration = row[\"duration\"]\n    if isinstance(duration, bool) or not isinstance(duration, Real):\n        raise ValueError(\"Invalid duration\")\n    if not isfinite(duration) or not 0 < duration <= policy[\"duration_max\"]:\n        raise ValueError(\"Invalid duration\")\n    if type(row[\"priority\"]) is not int:\n        raise ValueError(\"Invalid priority\")\n    if type(row[\"cancelled\"]) is not bool:\n        raise ValueError(\"Invalid cancelled flag\")\n    if row[\"cancelled\"] and not policy[\"cancelled_blocks\"]:\n        raise ValueError(\"Cancelled appointment\")\n    start = parse_utc(row[\"start\"])\n    end = start + timedelta(minutes=duration)\n    if start < earliest:\n        raise ValueError(\"Insufficient lead time\")\n    local_start = start.astimezone(zone)\n    if local_start.date().isoformat() == policy[\"blackout_day\"]:\n        raise ValueError(\"Blackout day\")\n    cutoff = datetime.combine(\n        local_start.date(), time(policy[\"cutoff_hour\"], 0), tzinfo=zone\n    ).astimezone(UTC)\n    if policy[\"cutoff_inclusive\"]:\n        valid_end = end <= cutoff\n    else:\n        valid_end = end < cutoff\n    if not valid_end:\n        raise ValueError(\"Appointment exceeds cutoff\")\n    return start, end\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 timedelta\nfrom zoneinfo import ZoneInfo\n\nfrom helpers import overlaps, parse_utc, validate_interval\n\n\ndef run(payload, policy):\n    now = parse_utc(payload[\"now\"])\n    earliest = now + timedelta(minutes=policy[\"lead_minutes\"])\n    zone = ZoneInfo(policy[\"timezone\"])\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            start, end = validate_interval(row, earliest, zone, policy)\n        except (KeyError, ValueError, TypeError, OverflowError):\n            results[\"rejected\"].append((index, identifier))\n            continue\n        candidates.append((index, identifier, row, start, end))\n\n    direction = -1 if policy[\"priority_high_first\"] else 1\n    candidates.sort(key=lambda item: (direction * item[2][\"priority\"], item[0]))\n    accepted = []\n    for index, identifier, row, start, end in candidates:\n        intersecting = sum(\n            overlaps(start, end, other_start, other_end, policy[\"adjacency_allowed\"])\n            for other_start, other_end in accepted\n        )\n        if intersecting >= policy[\"capacity\"]:\n            results[\"rejected\"].append((index, identifier))\n            continue\n        accepted.append((start, end))\n        category = \"blocked\" if row[\"cancelled\"] else \"selected\"\n        results[category].append((index, identifier))\n\n    order_key = (lambda item: item[1]) if policy[\"report_order\"] == \"id\" else (lambda item: item[0])\n    return {\n        category: [identifier for index, identifier in sorted(items, key=order_key)]\n        for category, items in results.items()\n    }\n"}}