#!/usr/bin/env python3
"""
Validate JSONL data format and integrity.
"""
import json
import sys
from pathlib import Path


def validate_jsonl(file_path: str) -> bool:
    """Validate a JSONL file format."""
    path = Path(file_path)
    if not path.exists():
        print(f"Error: File not found: {file_path}")
        return False
    
    valid = True
    line_num = 0
    with open(path) as f:
        for line in f:
            line_num += 1
            try:
                data = json.loads(line)
                # Basic validation
                if not isinstance(data, dict):
                    print(f"Line {line_num}: Not a JSON object")
                    valid = False
            except json.JSONDecodeError as e:
                print(f"Line {line_num}: Invalid JSON - {e}")
                valid = False
    
    print(f"Validated {path}: {line_num} lines, valid={valid}")
    return valid


if __name__ == "__main__":
    file_path = sys.argv[1] if len(sys.argv) > 1 else "data/brain/reasoning_steps.jsonl"
    validate_jsonl(file_path)