import { isValidLocale } from './helpers.js';
/**
 * Builds a locale-prefixed path for a document in a target locale.
 *
 * Always prefixes the locale: /{locale} or /{locale}/{slug}. The home slug
 * collapses to the locale root. Returns undefined if the document has no slug
 * in the target locale (caller decides fallback behavior).
 *
 * @example
 * buildLocalizedPath({ slugs: { pl: 'strona-glowna', en: 'home' }, locale: 'en', config })
 * // → '/en'  (home slug collapses to root)
 *
 * buildLocalizedPath({ slugs: { pl: 'o-nas', en: 'about' }, locale: 'en', config })
 * // → '/en/about'
 *
 * buildLocalizedPath({
 *   slugs: { pl: 'moj-post', en: 'my-post' },
 *   prefix: { pl: 'artykuly', en: 'articles' },
 *   locale: 'en',
 *   config,
 * })
 * // → '/en/articles/my-post'
 */ export function buildLocalizedPath({ config, homeSlug = 'home', locale, prefix, slugs }) {
    if (!isValidLocale(locale, config)) {
        return undefined;
    }
    const slug = slugs[locale];
    if (!slug) {
        return undefined;
    }
    if (prefix) {
        const segment = prefix[locale];
        // No archive slug in this locale means the entry is unreachable there —
        // there's no path to point at, so hreflang should omit it rather than
        // invent /en/moj-post.
        if (!segment) {
            return undefined;
        }
        return `/${locale}/${segment}/${slug}`;
    }
    if (slug === homeSlug) {
        return `/${locale}`;
    }
    return `/${locale}/${slug}`;
}
/**
 * Resolves the equivalent path for the same document in a different locale —
 * the language-switcher use case (/pl/strona-glowna → /en/home).
 *
 * Never dead-ends on a 404. When the document has no slug in the target locale,
 * falls back to the archive it belongs to (/en/articles) if there is one, and
 * to the locale root otherwise — the closest place the visitor would want.
 */ export function switchLocalePath({ config, homeSlug = 'home', prefix, slugs, targetLocale }) {
    const path = buildLocalizedPath({
        config,
        homeSlug,
        locale: targetLocale,
        prefix,
        slugs
    });
    if (path) {
        return path;
    }
    const archiveSegment = prefix?.[targetLocale];
    if (archiveSegment) {
        return `/${targetLocale}/${archiveSegment}`;
    }
    return `/${targetLocale}`;
} //# sourceMappingURL=localizedPath.js.map

//# sourceMappingURL=localizedPath.js.map