#!/usr/bin/env python3
"""Inspect local data without installing a Hub client or executing remote code."""
import argparse
from fractions import Fraction
import json
from pathlib import Path

ROOT = Path(__file__).resolve().parents[1]

def main():
    schema = json.loads((ROOT / "DATA_SCHEMA.json").read_text(encoding="utf-8"))
    parser = argparse.ArgumentParser()
    parser.add_argument("--config", default="claims", choices=list(schema["configurations"]))
    parser.add_argument("--show", type=int, default=1)
    args = parser.parse_args()
    rows = [json.loads(line) for line in (ROOT / schema["configurations"][args.config]["path"]).read_text(encoding="utf-8").splitlines()]
    print(f"{args.config}: {len(rows)} rows; organizational split=test")
    for row in rows[:max(0, args.show)]:
        print(json.dumps(row, indent=2, ensure_ascii=False))
    if args.config == "tomography_exact":
        comparisons = 0
        for row in rows:
            for z, expected in zip(row["probe_z"], row["probe_response_exact"]):
                z = Fraction(z)
                actual = sum((Fraction(r)*Fraction(t)/(z+Fraction(t)) for r,t in zip(row["r"], row["t"])), Fraction(0))
                if actual != Fraction(expected):
                    raise ValueError(f"Response mismatch in {row['record_id']}")
                comparisons += 1
        print(f"Exact spectral-response comparisons passed: {comparisons}")

if __name__ == "__main__":
    main()