#!/usr/bin/env python3
"""Count lines in Python files - a simple verification utility."""

import os
import sys
from pathlib import Path


def count_python_lines(directory: str) -> dict:
    """Count total lines, code lines, and comment lines in Python files."""
    total_lines = 0
    code_lines = 0
    comment_lines = 0
    files_count = 0
    
    dir_path = Path(directory)
    if not dir_path.exists():
        return {"error": f"Directory not found: {directory}"}
    
    for py_file in dir_path.rglob("*.py"):
        try:
            with open(py_file, 'r', encoding='utf-8') as f:
                lines = f.readlines()
                files_count += 1
                
                for line in lines:
                    stripped = line.strip()
                    total_lines += 1
                    if stripped.startswith('#'):
                        comment_lines += 1
                    elif stripped:
                        code_lines += 1
        except Exception as e:
            pass
    
    return {
        "directory": str(dir_path.resolve()),
        "python_files": files_count,
        "total_lines": total_lines,
        "code_lines": code_lines,
        "comment_lines": comment_lines,
        "empty_lines": total_lines - code_lines - comment_lines
    }


def main():
    if len(sys.argv) < 2:
        print("Usage: line_counter.py <directory>")
        print("Counts lines in Python files recursively")
        sys.exit(1)
    
    result = count_python_lines(sys.argv[1])
    
    if "error" in result:
        print(f"Error: {result['error']}")
        sys.exit(1)
    
    print(f"Python files: {result['python_files']}")
    print(f"Total lines: {result['total_lines']}")
    print(f"Code lines: {result['code_lines']}")
    print(f"Comment lines: {result['comment_lines']}")
    print(f"Empty lines: {result['empty_lines']}")


if __name__ == "__main__":
    main()