#!/usr/bin/env python3
"""quick-json-validator.py - Validate JSON files in a directory.

Usage: python quick-json-validator.py <directory>
Exit 0 if all files valid, 1 if any invalid.
"""

import json
import sys
from pathlib import Path


def validate_json_files(directory: str):
    """Validate all .json files in the given directory."""
    dir_path = Path(directory)
    
    if not dir_path.exists():
        print(f"Error: Directory '{directory}' does not exist")
        return 1
    
    if not dir_path.is_dir():
        print(f"Error: '{directory}' is not a directory")
        return 1
    
    json_files = list(dir_path.glob('*.json'))
    
    if not json_files:
        print(f"No .json files found in '{directory}'")
        return 0
    
    errors = []
    for json_file in json_files:
        try:
            with open(json_file, 'r') as f:
                json.load(f)
            print(f"[OK] {json_file.name}")
        except json.JSONDecodeError as e:
            errors.append((json_file, e))
            print(f"[FAIL] {json_file.name}: {e}")
        except Exception as e:
            errors.append((json_file, e))
            print(f"[ERROR] {json_file.name}: {e}")
    
    if errors:
        print(f"\nFound {len(errors)} invalid file(s)")
        return 1
    
    print(f"\nAll {len(json_files)} file(s) valid")
    return 0


if __name__ == '__main__':
    if len(sys.argv) != 2:
        print(__doc__)
        sys.exit(1)
    
    sys.exit(validate_json_files(sys.argv[1]))