utils.py

import re
import random
import string
from typing import List, Dict, Optional

def is_valid_email_format(email: str) -> bool:
    """Проверка базового формата email"""
    if not email or '@' not in email:
        return False
    
    pattern = r'^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$'
    return re.match(pattern, email) is not None

def extract_domain(email: str) -> Optional[str]:
    """Извлечение домена из email"""
    if '@' in email:
        return email.split('@')[1].lower()
    return None

def generate_username(pattern: str = "random") -> str:
    """Генерация имени пользователя"""
    if pattern == "random":
        names = ["john", "jane", "mike", "sarah", "david", "lisa", "robert", "emma"]
        return random.choice(names)
    elif pattern == "numbers":
        names = ["john", "jane", "mike", "sarah", "david", "lisa", "robert", "emma"]
        return random.choice(names) + str(random.randint(1, 999))
    else:
        return ''.join(random.choices(string.ascii_lowercase, k=8))

def clean_email_list(emails: str) -> List[str]:
    """Очистка списка email от дубликатов и пустых строк"""
    email_list = []
    for email in emails.split('\n'):
        email = email.strip()
        if email and email not in email_list:
            email_list.append(email)
    return email_list

def format_validation_results(results: List[Dict]) -> List[List]:
    """Форматирование результатов для отображения в таблице"""
    formatted = []
    for result in results:
        formatted.append([
            result.get("email", ""),
            result.get("overall_status", "unknown"),
            "✓" if result.get("format_valid", False) else "✗",
            "✓" if result.get("domain_valid", False) else "✗",
            "✓" if result.get("mx_valid", False) else "✗",
            result.get("smtp_valid", "unknown")
        ])
    return formatted

def get_status_color(status: str) -> str:
    """Получение цвета для статуса"""
    colors = {
        "valid": "#28a745",
        "invalid": "#dc3545",
        "disposable": "#ffc107",
        "unknown": "#6c757d",
        "error": "#dc3545",
        "invalid_domain": "#dc3545"
    }
    return colors.get(status, "#6c757d")

def generate_sample_emails(count: int = 5) -> List[str]:
    """Генерация примеров email для демонстрации"""
    samples = [
        "john.doe@gmail.com",
        "invalid-email",
        "test@nonexistentdomain12345.com",
        "user@10minutemail.com",
        "admin@github.com"
    ]
    return samples[:count]

def calculate_validation_time(start_time: float, end_time: float) -> str:
    """Расчет времени валидации"""
    duration = end_time - start_time
    if duration < 1:
        return f"{int(duration * 1000)} мс"
    else:
        return f"{duration:.2f} сек"