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#!/usr/bin/env python3
"""Collect sorted scene_id values from all JSON files in this directory."""

from __future__ import annotations

import json
from pathlib import Path
from typing import Any, Set


OUTPUT_NAME = "scan_id.txt"


def collect_scene_ids(obj: Any, out: Set[str]) -> None:
    """Recursively collect values for keys named scene_id."""
    if isinstance(obj, dict):
        for key, value in obj.items():
            if key == "scene_id":
                if isinstance(value, str):
                    out.add(value)
                elif value is not None:
                    out.add(str(value))
            collect_scene_ids(value, out)
    elif isinstance(obj, list):
        for item in obj:
            collect_scene_ids(item, out)


def main() -> None:
    qa_dir = Path(__file__).resolve().parent
    json_files = sorted(qa_dir.glob("*.json"))

    scene_ids: Set[str] = set()
    for json_file in json_files:
        with json_file.open("r", encoding="utf-8") as f:
            data = json.load(f)
        collect_scene_ids(data, scene_ids)

    output_path = qa_dir / OUTPUT_NAME
    with output_path.open("w", encoding="utf-8") as f:
        for scene_id in sorted(scene_ids):
            f.write(f"{scene_id}\n")

    print(f"Processed {len(json_files)} JSON files.")
    print(f"Found {len(scene_ids)} unique scene_id values.")
    print(f"Saved to: {output_path}")


if __name__ == "__main__":
    main()