#!/usr/bin/env python3
import argparse
import json
from collections import Counter
from pathlib import Path


def main() -> None:
    parser = argparse.ArgumentParser(description="Replay and summarize cancer risk MCP log JSONL")
    parser.add_argument("--log-jsonl", required=True, help="Path to cancer_risk_log.jsonl")
    args = parser.parse_args()

    path = Path(args.log_jsonl)
    if not path.exists():
        raise FileNotFoundError(f"Log file not found: {path}")

    events = []
    for line in path.read_text(encoding="utf-8").splitlines():
        line = line.strip()
        if not line:
            continue
        events.append(json.loads(line))

    tool_counts = Counter([e.get("tool_name", "unknown") for e in events])

    print("# MCP Calculation Log Replay")
    print(f"events={len(events)}")
    for tool, n in sorted(tool_counts.items()):
        print(f"- {tool}: {n}")

    if events:
        print("\nlast_event=")
        print(json.dumps(events[-1], indent=2))


if __name__ == "__main__":
    main()