Regex pattern determination about poe-vendor-string HOT 2 CLOSED

fun shortestUnique(query: String, modifiers: List<String>): String {
    val cleanQuery = query.cleanInput()
    val mods = modifiers.filter { it != query }.joinToString(" ")
        .cleanInput()

    val resultWithSpace = subStrings(cleanQuery).firstOrNull {
        !mods.contains(it)
                && !it.contains(Regex("[|\\n\\\\+]"))
                && !it.endsWith(" ")
    }
    val resultWithoutSpace = subStrings(cleanQuery).firstOrNull {
        !mods.contains(it)
                && !it.contains(" ")
                && !it.contains("-")
                && !it.contains("|")
                && !it.contains("\\")
                && !it.contains("+")
                && !it.endsWith(" ")
    }
    val spaceLength = resultWithSpace?.length ?: 1000
    val nospaceLength = resultWithoutSpace?.length ?: 1000
    val regexResult = if (nospaceLength <= spaceLength + 2) resultWithoutSpace else "\"$resultWithSpace\""
    val finalResult = regexResult ?: query
    val finalWithoutNumbers = finalResult.replace("#", "\\\\d+")
    return if (finalWithoutNumbers.contains(" ") && !finalWithoutNumbers.startsWith("\"")) "\"$finalWithoutNumbers\"" else finalWithoutNumbers
}