# -*- coding: utf-8 -*-
"""
collatz_build_initial_noyau.py

Build initial R17 noyau from completion (Parents both).
Used before D10 when running palier-by-palier.

Usage: python collatz_build_initial_noyau.py --m15m16 PATH --output JSON
"""

from __future__ import annotations
import argparse
import json
from pathlib import Path


def main() -> None:
    ap = argparse.ArgumentParser(description="Build R17 noyau from completion")
    ap.add_argument("--m15m16", required=True, help="Path to complétion_minorée_m15_vers_m16.md")
    ap.add_argument("--output", required=True, help="Output noyau JSON path")
    args = ap.parse_args()

    from collatz_k_pipeline import build_R17_from_completion

    residues = build_R17_from_completion(args.m15m16)
    out = {"noyau": residues, "palier": 17}
    Path(args.output).parent.mkdir(parents=True, exist_ok=True)
    Path(args.output).write_text(json.dumps(out, indent=2), encoding="utf-8")
    print(f"Wrote {args.output}: {len(residues)} residues (R17)")


if __name__ == "__main__":
    main()