#!/usr/bin/env python3
"""JSON path finder - extracts values at given JSON paths from files."""
import sys
import json
from pathlib import Path

def get_nested_value(data, path):
    """Get value at dotted path like 'users.0.name'."""
    keys = path.split('.')
    result = data
    for key in keys:
        if key.isdigit():
            key = int(key)
        if isinstance(result, dict):
            result = result.get(key)
        elif isinstance(result, list) and isinstance(key, int):
            result = result[key] if key < len(result) else None
        else:
            return None
        if result is None:
            return None
    return result

def main():
    if len(sys.argv) != 3:
        print("Usage: json_path_finder.py <json_file> <path>", file=sys.stderr)
        sys.exit(1)
    
    json_file = Path(sys.argv[1])
    path = sys.argv[2]
    
    try:
        data = json.loads(json_file.read_text())
        value = get_nested_value(data, path)
        if value is None:
            print(f"Path '{path}' not found")
            sys.exit(1)
        print(json.dumps(value, indent=2))
    except json.JSONDecodeError as e:
        print(f"Invalid JSON: {e}", file=sys.stderr)
        sys.exit(1)
    except FileNotFoundError:
        print(f"File not found: {json_file}", file=sys.stderr)
        sys.exit(1)

if __name__ == "__main__":
    main()