#!/usr/bin/env python3
"""Simple Python syntax validator - verifies Python files parse correctly."""

import ast
import sys
from pathlib import Path

def validate_python_file(filepath: str) -> tuple[bool, str]:
    """Validate a Python file's syntax.
    
    Returns:
        (True, "OK") if valid syntax
        (False, error_message) if invalid
    """
    try:
        path = Path(filepath)
        source = path.read_text()
        ast.parse(source, filename=str(path))
        return True, "OK"
    except FileNotFoundError:
        return False, f"File not found: {filepath}"
    except SyntaxError as e:
        return False, f"SyntaxError at line {e.lineno}: {e.msg}"
    except Exception as e:
        return False, f"Error: {e}"

def main():
    if len(sys.argv) < 2:
        print("Usage: python_syntax_validator.py <file1.py> [file2.py] ...")
        sys.exit(1)
    
    all_valid = True
    for filepath in sys.argv[1:]:
        valid, msg = validate_python_file(filepath)
        if valid:
            print(f"VALID: {filepath}")
        else:
            print(f"INVALID: {filepath} - {msg}")
            all_valid = False
    
    sys.exit(0 if all_valid else 1)

if __name__ == "__main__":
    main()