{"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    \"capacity\": 2,\n    \"report_order\": \"input\",\n    \"blackout_day\": \"2026-11-02\",\n    \"priority_high_first\": False,\n}\n","helpers.py":"from datetime import datetime, timezone\n\n\ndef parse_instant(value):\n    if not isinstance(value, str):\n        raise ValueError(\"Expected an offset-aware ISO datetime string\")\n    if value.endswith(\"Z\"):\n        value = value[:-1] + \"+00:00\"\n    parsed = datetime.fromisoformat(value)\n    if parsed.tzinfo is None or parsed.utcoffset() is None:\n        raise ValueError(\"Datetime must include an offset\")\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\n\ndef report(entries, order):\n    key = (lambda entry: entry[1]) if order == \"id\" else (lambda entry: entry[0])\n    return [identifier for _, identifier in sorted(entries, key=key)]\n","core.py":"from datetime import datetime, timedelta, timezone\nfrom math import isfinite\nfrom zoneinfo import ZoneInfo\n\nfrom helpers import overlaps, parse_instant, report\n\n\ndef run(payload, policy):\n    now = parse_instant(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            duration = row[\"duration\"]\n            priority = row[\"priority\"]\n            cancelled = row[\"cancelled\"]\n            if isinstance(duration, bool) or not isinstance(duration, (int, float)):\n                raise ValueError(\"Invalid duration\")\n            if not isfinite(duration) or not 0 < duration <= policy[\"duration_max\"]:\n                raise ValueError(\"Invalid duration\")\n            if isinstance(priority, bool) or not isinstance(priority, int):\n                raise ValueError(\"Invalid priority\")\n            if not isinstance(cancelled, bool):\n                raise ValueError(\"Invalid cancellation flag\")\n            if cancelled and not policy[\"cancelled_blocks\"]:\n                raise ValueError(\"Cancelled appointment\")\n\n            start = parse_instant(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(\n                local_start.year,\n                local_start.month,\n                local_start.day,\n                policy[\"cutoff_hour\"],\n                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((index, identifier))\n            continue\n\n        candidates.append((priority, index, identifier, start, end, cancelled))\n\n    candidates.sort(\n        key=lambda item: (\n            -item[0] if policy[\"priority_high_first\"] else item[0],\n            item[1],\n        )\n    )\n    accepted = []\n    for _, 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((index, identifier))\n            continue\n        accepted.append((start, end))\n        category = \"blocked\" if cancelled else \"selected\"\n        results[category].append((index, identifier))\n\n    return {\n        category: report(entries, policy[\"report_order\"])\n        for category, entries in results.items()\n    }\n"}}