Bugfix and improve Comparator

app/src/main/java/net/pokeranalytics/android/model/comparison/Comparator.kt

@@ -8,10 +8,8 @@ import net.pokeranalytics.android.exceptions.PokerAnalyticsException
 import net.pokeranalytics.android.model.filter.Filterable
 import net.pokeranalytics.android.model.filter.QueryCondition
 import net.pokeranalytics.android.model.realm.Session
-import net.pokeranalytics.android.ui.fragment.CalendarFragment
 import java.util.*
 import kotlin.collections.ArrayList
-import kotlin.collections.HashSet
 
 enum class Comparator {
 	DAY_OF_WEEK,
@@ -24,7 +22,7 @@ enum class Comparator {
 	val queryConditions: List<QueryCondition>
 		get() {
 			return when (this) {
-                MONTH_OF_YEAR -> List(12) { index-> QueryCondition.MONTH().apply { setMonth(index+1) } }
+				MONTH_OF_YEAR -> List(12) { index -> QueryCondition.MONTH().apply { setMonth(index) } }
 				DAY_OF_WEEK -> listOf()
 				YEAR -> {
 					val years = arrayListOf<QueryCondition.YEAR>()
@@ -33,22 +31,12 @@ enum class Comparator {
 					val yearNow = calendar.get(Calendar.YEAR)
 					val realm = Realm.getDefaultInstance()
 					realm.where<Session>().sort("year", Sort.ASCENDING).findFirst()?.year?.let {
-                        List(yearNow - it ) { index-> QueryCondition.YEAR().apply { setYear(yearNow - index) } }
-                    }
-                    realm.close()
-                    years
-                    /*
-                    val years = arrayListOf<QueryCondition.YEAR>()
-                    val realm = Realm.getDefaultInstance()
-                    val distinctYears = realm.where<Session>().distinct("year").findAll().sort("year", Sort.DESCENDING)
-                    distinctYears.forEach { session ->
-                        session.year?.let { year ->
-                            years.add(QueryCondition.YEAR().apply { setYear(year) })
+						for (index in 0..(yearNow - it)) {
+							years.add(QueryCondition.YEAR().apply { setYear(yearNow - index) })
 						}
 					}
 					realm.close()
 					years
-                    */
 				}
 				else -> throw PokerAnalyticsException.QueryTypeUnhandled
 			}
@@ -80,12 +68,14 @@ fun <T> getCombinations(lists: List<List<T>>): List<List<T>> {
 
 	// extract each of the integers in the first list
 	// and add each to ints as a new list
+	if (lists.isNotEmpty()) {
 		for (i in lists[0]) {
 			val newList = ArrayList<T>()
 			newList.add(i)
 			combinations.add(newList)
 		}
 		index++
+	}
 	while (index < lists.size) {
 		val nextList = lists[index]
 		newCombinations = LinkedHashSet()