import { Locale, locales, defaultLocale } from './i18n';
import { getTranslations } from './translations';

export function updateDocumentMeta(locale: Locale) {
    const translations = getTranslations(locale);

    // Update document title
    document.title = translations.meta.title;

    // Update meta description
    updateMetaTag('description', translations.meta.description);

    // Update HTML lang attribute
    document.documentElement.lang = locale;
}

function updateMetaTag(name: string, content: string) {
    let meta = document.querySelector(`meta[name="${name}"]`) as HTMLMetaElement;
    if (!meta) {
        meta = document.createElement('meta');
        meta.name = name;
        document.head.appendChild(meta);
    }
    meta.content = content;
}

export function generateAlternateLinks(pathname: string, baseUrl: string = '') {
    return locales.map((locale) => ({
        hrefLang: locale,
        href:
            locale === defaultLocale ? `${baseUrl}${pathname}` : `${baseUrl}/${locale}${pathname}`,
    }));
}

export function generateCanonicalUrl(pathname: string, locale: Locale, baseUrl: string = '') {
    return locale === defaultLocale ? `${baseUrl}${pathname}` : `${baseUrl}/${locale}${pathname}`;
}

export function generateStructuredData(
    type: 'WebSite' | 'BlogPosting' | 'Organization',
    data: any,
    locale: Locale,
) {
    const baseUrl = process.env.NEXT_PUBLIC_BASE_URL || 'https://your-domain.com';
    const translations = getTranslations(locale);

    const baseStructuredData = {
        '@context': 'https://schema.org',
        '@type': type,
    };

    switch (type) {
        case 'WebSite':
            return {
                ...baseStructuredData,
                name: translations.meta.title,
                description: translations.meta.description,
                url: baseUrl,
                inLanguage: locale,
                availableLanguage: locales,
            };

        case 'BlogPosting':
            return {
                ...baseStructuredData,
                headline: data.title,
                description: data.excerpt,
                author: {
                    '@type': 'Person',
                    name: data.author,
                },
                datePublished: data.date,
                dateModified: data.date,
                inLanguage: locale,
            };

        case 'Organization':
            return {
                ...baseStructuredData,
                name: translations.meta.title,
                description: translations.meta.description,
                url: baseUrl,
            };

        default:
            return baseStructuredData;
    }
}