// Utility functions for sitemap generation
export const DOMAIN_CONFIG = {
    MAIN_DOMAIN: 'nobat724.com',
    MAX_SPECIALTY_COMBINATIONS: 20, // Limit specialty combinations to prevent too many URLs
    MAIN_CITIES: ['108', '104', '111', '117', '113'], // Tehran, Isfahan, Mashhad, Shiraz, Ahvaz
};

export function isMainDomain(domain) {
    return domain === DOMAIN_CONFIG.MAIN_DOMAIN || domain.includes('localhost') || domain.includes('127.0.0.1');
}

export function encodeUrlParam(param) {
    return encodeURIComponent(param || '');
}

export function createSitemapUrl(baseUrl, path, params = {}) {
    let url = `${baseUrl}${path}`;
    const searchParams = new URLSearchParams();

    Object.entries(params).forEach(([key, value]) => {
        if (value) {
            searchParams.append(key, value);
        }
    });

    const queryString = searchParams.toString();
    const fullUrl = queryString ? `${url}?${queryString}` : url;

    // Escape XML entities
    return escapeXml(fullUrl);
}

export function escapeXml(str) {
    return str
        .replace(/&/g, '&')
        .replace(/</g, '&lt;')
        .replace(/>/g, '&gt;')
        .replace(/"/g, '&quot;')
        .replace(/'/g, '&apos;');
}

export function createSitemapEntry(url, priority = 0.8, changeFrequency = 'weekly') {
    return {
        url,
        lastModified: new Date(),
        changeFrequency,
        priority,
    };
}

export function limitArray(array, limit) {
    return limit > 0 ? array.slice(0, limit) : array;
}

export function getBaseUrl(domain) {
    return `https://${domain}`;
}