#!/usr/bin/env python3
import json
import sys

def fix_names(obj):
    """
    Recursively traverse obj (which may be a dict or list),
    and whenever we find obj['meta']['name'], replace '-' with '_'.
    """
    if isinstance(obj, dict):
        # if this dict has a 'meta' sub-dict with a 'name' key, fix it
        meta = obj.get("meta")
        if isinstance(meta, dict) and "name" in meta:
            name = meta["name"]
            if isinstance(name, str) and "-" in name:
                meta["name"] = name.replace("-", "_")
        # recurse into all values
        for v in obj.values():
            fix_names(v)

    elif isinstance(obj, list):
        for item in obj:
            fix_names(item)

def main():
    if len(sys.argv) < 2:
        print("Usage: python3 process_json.py input.json [output.json]")
        sys.exit(1)

    in_path = sys.argv[1]
    out_path = sys.argv[2] if len(sys.argv) >= 3 else None

    # load
    with open(in_path, "r", encoding="utf-8") as f:
        data = json.load(f)

    # process
    fix_names(data)

    # write
    if out_path:
        with open(out_path, "w", encoding="utf-8") as f:
            json.dump(data, f, indent=2, ensure_ascii=False)
        print(f"Processed JSON written to {out_path}")
    else:
        print(json.dumps(data, indent=2, ensure_ascii=False))

if __name__ == "__main__":
    main()