feat: cargo unload challenge

internal/controller/route.go

@@ -171,9 +171,6 @@ func (c *Cache) listRoutedSendGroupIds(pn uint) iter.Seq[int] {
 }
 
 // Невозможно лишь выгрузить колонистов на чужой планете.
-/*
-TODO: Очерёдность выгрузки согласно правилам
-*/
 func (c *Cache) TurnUnloadEnroutedGroups() {
 	for i := range c.g.Map.Planet {
 		p := &c.g.Map.Planet[i]
@@ -245,7 +242,7 @@ func (c *Cache) selectColUnloadGroup(groups []int) (result iter.Seq[int]) {
 	}
 
 	// select winner to unload cargo
-	id := MaxOrRandomLoadId(loadByRace)
+	id := MaxOrRandomLoadId(loadByRace, func(ri int) float64 { return float64(c.g.Race[ri].Votes) })
 	result = slices.Values(groupByRace[id])
 
 	return
@@ -277,23 +274,25 @@ func (c *Cache) listRoutedUnloadShipGroupIds(pn uint, routeType game.RouteType)
 	}
 }
 
-func MaxOrRandomLoadId(loadByRace map[int]float64) int {
-	if len(loadByRace) < 2 {
+func MaxOrRandomLoadId(raceLoad map[int]float64, pop func(int) float64) int {
+	if len(raceLoad) < 2 {
 		panic("loadByRace must contain at least 2 keys")
 	}
-	IDs := slices.Collect(maps.Keys(loadByRace))
-	slices.SortFunc(IDs, func(id1, id2 int) int {
+	raceIndex := slices.Collect(maps.Keys(raceLoad))
+	slices.SortFunc(raceIndex, func(ria, rib int) int {
 		return cmp.Or(
-			cmp.Compare(loadByRace[id2], loadByRace[id1]),
+			// maximum quantity of unloading colonists
+			cmp.Compare(raceLoad[rib], raceLoad[ria]),
+
+			// maximum population of the race
+			cmp.Compare(pop(rib), pop(ria)),
+
+			// Random winner
+			cmp.Compare(rand.Float64(), rand.Float64()),
+
+			// in theoty, unreacheable option, but let's randomize again
+			cmp.Compare(rand.Float64(), rand.Float64()),
 		)
 	})
-
-	// no single winner with highest load
-	if loadByRace[IDs[0]] == loadByRace[IDs[1]] {
-		// remove IDs which load less than maximum
-		IDs = slices.DeleteFunc(IDs, func(v int) bool { return loadByRace[v] < loadByRace[IDs[0]] })
-		// IDs[0] will have random index
-		rand.Shuffle(len(IDs), func(i, j int) { IDs[i], IDs[j] = IDs[j], IDs[i] })
-	}
-	return IDs[0]
+	return raceIndex[0]
 }