package link.roadio.riff.config

/** Fixed schema capacity; user model overrides must retain the adopted tail influence. */
object UserHistoryPolicy {
    const val CAPACITY = 382
    const val ALIGNMENT = 4096
    const val MAX_FILE_BYTES = 12 * 1024
    const val DEFAULT_DECAY = 0.9892280131939755
    const val DEFAULT_WEIGHT = 46.41669257526021

    fun validateDecay(value: Double) {
        require(value.isFinite() && value > 0 && value < 1 && Math.pow(value, (CAPACITY - 1).toDouble()) >= 0.01) {
            "History decay must retain at least one percent at the adopted capacity"
        }
    }
}