#!/usr/bin/env python3
"""Verify UTF-8 encoding in all JSON files."""

import json
import sys
from pathlib import Path

def verify_utf8(path: Path) -> tuple[int, int]:
    """Check a JSON file for valid UTF-8. Returns (errors, bytes_checked)."""
    try:
        with open(path, 'r', encoding='utf-8') as f:
            content = f.read()
    except UnicodeDecodeError as e:
        print(f"  [ERROR] {path}: Invalid UTF-8 at position {e.start}")
        return (1, 0)
    
    try:
        json.loads(content)
    except json.JSONDecodeError as e:
        print(f"  [ERROR] {path}: Invalid JSON at position {e.pos}: {e}")
        return (1, 0)
    
    return (0, len(content))

def main():
    import argparse
    parser = argparse.ArgumentParser(description="Verify UTF-8 encoding in JSON files")
    parser.add_argument('path', nargs='?', default='.', help='Root directory to scan')
    args = parser.parse_args()
    
    root = Path('.').resolve()
    print(f"Scanning {root} for JSON files...")
    
    stats = {"files": 0, "errors": 0, "bytes": 0}
    
    for path in Path('.').rglob("*.json"):
        if any(part.startswith('.') for part in path.parts):
            continue
        if path.name.startswith('.'):
            continue
            
        errors, bytes_checked = verify_utf8(path)
        stats["files_checked"] = stats.get("files_checked", 0) + 1
        stats["errors"] += errors
        stats["total_bytes"] = stats.get("total_bytes", 0) + bytes_checked
        
        if stats["files_checked"] % 50 == 0:
            print(f"  Checked {stats['files_checked']} files...")
    
    print(f"\nResults:")
    print(f"  Files checked: {stats['files_checked']}")
    print(f"  Total bytes: {stats['total_bytes']:,}")
    print(f"  Encoding errors: {stats['errors']}")
    
    if stats['errors'] == 0:
        print("All JSON files are valid UTF-8!")
        return 0
    else:
        print(f"Found {stats['errors']} files with encoding issues")
        return 1

if __name__ == '__main__':
    import argparse
    parser = argparse.ArgumentParser(description="Verify UTF-8 encoding in JSON files")
    parser.add_argument('path', nargs='?', default='.', help='Root directory to scan')
    args = parser.parse_args()
    sys.exit(main(args.path))