"""Write data/<pier>/origin_values.json (creation snapshot used by C3b) for a pier made before the app wrote it, from an early backup
(2026-10-20). The snapshot is marked reconstructed. usage: python tools/make_origin_values.py <pier> <backup folder name>"""
import json
import sys
from pathlib import Path

APP = Path(__file__).resolve().parents[1]
sys.path.insert(0, str(APP / "web"))
import store  # noqa: E402

name, bk = sys.argv[1], sys.argv[2]
d = APP / "data" / name
b = d / "backup" / bk
P, E = (json.loads((b / f).read_text(encoding="utf-8")) for f in ("params.json", "expected.json"))
info = json.loads((d / "pier.json").read_text(encoding="utf-8"))
store.wjson(d / "origin_values.json", {"label": info.get("template", "?"), "at": store.now(), "reconstructed": True,
                                      "source": f"backup/{bk}", "params": P, "expected": E})
print("written", d / "origin_values.json", "from", b)