Trying to replicate C#'s Uri.EscapeUriString()

stupid.kt

fun tryEncode(url: String): URL {
    val schemeSeparator = "://"
    val schemeIndex = url.indexOf(schemeSeparator)
    val scheme: String
    val urlWithoutScheme: String
    if (schemeIndex > 0) {
        scheme = url.substring(0, schemeIndex)
        urlWithoutScheme = url.substring(schemeIndex + schemeSeparator.length)
    }
    else {
        scheme = "https"
        urlWithoutScheme = url
    }
    val pathWithQueryString = urlWithoutScheme.replace(authority, "")
    val components = pathWithQueryString.split('?')
    val queryWithFragment = if (components.size > 1) components.last() else ""
    val subcomponent = queryWithFragment.split('#')
    val authority = urlWithoutScheme.substring(0, urlWithoutScheme.indexOf('/'))
    val path = components.firstOrNull()
    val query = subcomponent.firstOrNull()
    val fragment = if (subcomponent.size > 1) subcomponent.last() else ""
    return URI(scheme, authority, path, query, fragment).toURL()
}