/**
 * TT-Core Validation Utilities
 * String similarity and data validation
 */

/**
 * Calculate similarity between two strings (0-100%)
 * @param {string} str1 - First string
 * @param {string} str2 - Second string
 * @returns {number} - Similarity percentage
 */
export function calculateSimilarity(str1, str2) {
    if (!str1 || !str2) return 0;

    str1 = ('' + str1).toLowerCase();
    str2 = ('' + str2).toLowerCase();

    let matchCount = 0;
    for (let char of str1) {
        if (str2.includes(char)) matchCount++;
    }

    return (matchCount / str1.length) * 100;
}

/**
 * Validate data against multiple fields with similarity threshold
 * @param {string} street - Street name
 * @param {string} zip - ZIP code
 * @param {string} city - City name
 * @param {string} info - Info to validate against
 * @param {number} threshold - Similarity threshold (default: 90)
 * @returns {boolean} - Validation result
 */
export function validateData(street, zip, city, info, threshold = 90) {
    return !(
        calculateSimilarity(street, info) < threshold ||
        calculateSimilarity(zip, info) < threshold ||
        calculateSimilarity(city, info) < threshold
    );
}

/**
 * Validate email format
 * @param {string} email - Email to validate
 * @returns {boolean} - Validation result
 */
export function validateEmail(email) {
    if (!email) return false;
    return /^[^\s@]+@[^\s@]+\.[^\s@]+$/.test(email);
}

/**
 * Generate random password
 * @param {number} length - Password length
 * @returns {string} - Generated password
 */
export function generatePassword(length = 12) {
    const chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
    let password = "";
    for (let i = 0; i < length; i++) {
        password += chars.charAt(Math.floor(Math.random() * chars.length));
    }
    return password;
}