class Patient() : RealmObject {
    @PrimaryKey
    var _id: ObjectId = ObjectId()
    var firstName: String = ""
    var lastName: String = ""
    var visits: Array<PelletInsertionVisit> = arrayOf(PelletInsertionVisit())  <---- ERROR on this line

    constructor(first: String = "", last: String = "") : this() {
        firstName = first
        lastName = last
    }
}

class PelletInsertionVisit() : RealmObject {
    @PrimaryKey
    var _id: ObjectId = ObjectId()
    var visitDate = LocalDateTime.now().toEpochSecond(ZoneOffset.UTC) //Note this is a Long, not a Date
    var pelletsUsed: Array<Pellet> = arrayOf(Pellet())


    constructor(pelletArray: Array<Pellet>, date: Long) : this() {
        visitDate = date
        pelletsUsed = pelletArray
    }
}

class Pellet(): RealmObject {
    @PrimaryKey
    var _id: ObjectId = ObjectId()
    var size = PelletSize.ZERO.value
    var lotNumber: String = "UNKNOWN"


    constructor(pelletSize: Int, lot: String = "") : this() {
        size = pelletSize
        lotNumber = lot
    }
}

enum class PelletSize (val value: Int){
    ZERO(0),  //UNSET
    TEN(10),
    TWENTY_FIVE(25),
    FIFTY(50),
    ONE_HUNDRED(100),
    TWO_HUNDRED(200);

    companion object {
        private val types = entries.associateBy { it.value }

        fun findByValue(value: Int): PelletSize? = types[value]
    }
}