{"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    \"capacity\": 1,\n    \"report_order\": \"id\",\n    \"blackout_day\": \"2026-11-01\",\n    \"priority_high_first\": True,\n}\n","helpers.py":"from datetime import datetime, timezone\n\n\ndef parse_utc(value):\n    if not isinstance(value, str):\n        raise ValueError(\"Datetime must be an offset-aware ISO string\")\n    parsed = datetime.fromisoformat(value.replace(\"Z\", \"+00:00\"))\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","core.py":"import math\nfrom datetime import datetime, time, timedelta, timezone\nfrom zoneinfo import ZoneInfo\n\nfrom helpers import overlaps, parse_utc\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    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    outputs = {\"selected\": [], \"blocked\": [], \"rejected\": []}\n    candidates = []\n    for identifier, (index, row) in retained.items():\n        priority = row.get(\"priority\")\n        if not isinstance(priority, int) or isinstance(priority, bool):\n            outputs[\"rejected\"].append((index, identifier))\n        else:\n            candidates.append((index, identifier, row))\n\n    candidates.sort(key=lambda item: (\n        -item[2][\"priority\"] if policy[\"priority_high_first\"] else item[2][\"priority\"],\n        item[0],\n    ))\n\n    accepted = []\n    for index, identifier, row in candidates:\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 math.isfinite(duration):\n                raise ValueError(\"Invalid duration\")\n            cancelled = row[\"cancelled\"]\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_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(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            outputs[\"rejected\"].append((index, identifier))\n            continue\n\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            outputs[\"rejected\"].append((index, identifier))\n            continue\n\n        accepted.append((start, end))\n        category = \"blocked\" if cancelled else \"selected\"\n        outputs[category].append((index, identifier))\n\n    result = {}\n    for category, entries in outputs.items():\n        entries.sort(key=lambda entry: entry[1] if policy[\"report_order\"] == \"id\" else entry[0])\n        result[category] = [identifier for index, identifier in entries]\n    return result\n"}}