#!/usr/bin/env python3
"""Line counter verification script - counts lines in Python files and outputs JSON report."""

import json
import sys
from pathlib import Path


def count_python_lines(filepath: str) -> dict:
    """Count lines in a Python file and return metadata."""
    path = Path(filepath)
    if not path.exists():
        return {"error": "File not found", "filepath": filepath, "success": False}
    
    try:
        with open(filepath, 'r', encoding='utf-8', errors='replace') as f:
            lines = f.readlines()
        
        total = len(lines)
        non_empty = sum(1 for line in lines if line.strip())
        blank = total - non_empty
        
        return {
            "filepath": filepath,
            "total_lines": total,
            "non_empty_lines": non_empty,
            "blank_lines": blank,
            "success": True
        }
    except Exception as e:
        return {"error": str(e), "filepath": filepath, "success": False}


def main():
    if len(sys.argv) < 2:
        print(json.dumps({"error": "Usage: python_line_counter.py <file1> [file2...]"}))
        sys.exit(1)
    
    files = sys.argv[1:]
    results = []
    total_lines = 0
    
    for f in files:
        result = count_python_lines(f)
        results.append(result)
        if result.get("success"):
            total_lines += result.get("total_lines", 0)
    
    output = {
        "files_processed": len(files),
        "total_lines": total_lines,
        "results": results
    }
    
    print(json.dumps(output, indent=2))


if __name__ == "__main__":
    main()