package bhylu.lessons.k_exceptions

fun parseMinutes(raw: String): Int {
    val minutes = raw.toIntOrNull() ?: throw IllegalArgumentException("Need whole minutes")
    require(minutes in 1..240) { "Minutes must be 1..240" }
    return minutes
}

fun main() {
    for (text in listOf("30", "-1", "bad")) {
        val notice = try {
            "Minutes: " + parseMinutes(text)
        } catch (error: IllegalArgumentException) {
            "Invalid duration"
        }
        println(notice)
    }
}