/**
 * URL helpers. Pure functions, no DOM access.
 */
/**
 * If `url` is not absolute, resolve it against `base`. Otherwise returns `url`.
 * Always returns a string ending in a way that matches the input (i.e. trailing
 * slashes are preserved for collection URLs).
 */
export function normalizeURL(url, base) {
    if (!/^https?:\/\//.test(url)) {
        const baseWithSlash = base.endsWith('/') ? base : base + '/';
        return new URL(url, baseWithSlash).href;
    }
    return url;
}
/**
 * Join a path onto a base URL, ensuring exactly one `/` between them.
 * Trailing slashes on `base` are preserved.
 */
export function joinURL(base, path) {
    const baseWithSlash = base.endsWith('/') ? base : base + '/';
    return new URL(path, baseWithSlash).href;
}
/** Return everything before the last `/` in `path`. */
export function dirname(path) {
    const idx = path.lastIndexOf('/');
    return idx === -1 ? '' : path.slice(0, idx);
}
/** Return everything after the last `/` in `path`. */
export function basename(path) {
    const idx = path.lastIndexOf('/');
    return idx === -1 ? path : path.slice(idx + 1);
}
/**
 * Resolve a parent URL of a collection URL. Strips the trailing slash
 * (the collection marker), pops the directory's own name, then re-appends
 * the trailing slash.
 *
 * @example
 *   parentCollectionURL("https://x/webdav/Music/Albums/")  // "https://x/webdav/Music/"
 *   parentCollectionURL("https://x/webdav/")                // "https://x/"
 */
export function parentCollectionURL(uri) {
    const trimmed = uri.replace(/\/+$/, '');
    const parent = dirname(trimmed);
    return parent ? parent + '/' : '';
}
/**
 * Strip a leading host prefix from a name (e.g. "example.comFoo" → "Foo").
 * Used to remove the WebDAV server's hostname from filenames that some servers
 * include as a prefix on each entry.
 */
export function stripHostPrefix(name, host) {
    if (!name || !host) {
        return name;
    }
    if (name.startsWith(host)) {
        const stripped = name.slice(host.length);
        return stripped.length ? stripped : host;
    }
    return name;
}