"""Validate basic quality of structured ADC JSON."""

from __future__ import annotations

import argparse
import json
from collections import Counter
from pathlib import Path


def main() -> None:
    parser = argparse.ArgumentParser(description="Validate structured ADC JSON.")
    parser.add_argument("--input", type=Path, required=True)
    args = parser.parse_args()

    data = json.loads(args.input.read_text(encoding="utf-8"))
    if not isinstance(data, list):
        raise SystemExit("Input must be a JSON list.")

    missing = Counter()
    section_counter = Counter()
    total_pil_chars = 0
    total_spc_chars = 0

    for record in data:
        for key in ("source_url", "name", "pil_text", "spc_text", "sections"):
            if not record.get(key):
                missing[key] += 1
        total_pil_chars += len(record.get("pil_text") or "")
        total_spc_chars += len(record.get("spc_text") or "")
        for section_name, section_text in (record.get("sections") or {}).items():
            if section_text:
                section_counter[section_name] += 1

    print(f"Records: {len(data)}")
    print(f"Average PIL chars: {total_pil_chars // max(len(data), 1)}")
    print(f"Average SPC chars: {total_spc_chars // max(len(data), 1)}")
    print("Missing fields:")
    for key in ("source_url", "name", "pil_text", "spc_text", "sections"):
        print(f"  {key}: {missing[key]}")
    print("Detected sections:")
    for key, value in section_counter.most_common():
        print(f"  {key}: {value}")


if __name__ == "__main__":
    main()