Feature#2081 (#2100)

* Unit can now only be purchased if no other unit of same type is stationed in city center #2081

* #2081
Added unique to landsknecht and changed condition for movement panelty

* Refactored when statement to if
#2081

* Only one plane at a time can be purchased to a maximum of 6 that are NOT transported in a single city
#2081

* removed duplicate code
#2081

* refactor canPurchase() and now track bought units in a city in a mutableList
#2081

* refactor canPurchase() it basicly just tracks if the unit can be placed on the center tile! if it cant then we dont allow the purchase!
#2081

* Changed wording of unique and added translations
#2081

* Changed wording of unique
#2081

* removed unneeded imports
#2081

Co-authored-by: Yair Morgenstern <yairm210@hotmail.com>

core/src/com/unciv/logic/city/CityConstructions.kt

@@ -312,7 +312,7 @@ class CityConstructions {
     }
 
     fun purchaseConstruction(constructionName: String): Boolean {
-        if (!getConstruction(constructionName).postBuildEvent(this))
+        if (!getConstruction(constructionName).postBuildEvent(this, true))
             return false // nothing built - no pay
 
         cityInfo.civInfo.gold -= getConstruction(constructionName).getGoldCost(cityInfo.civInfo)

core/src/com/unciv/logic/city/CityInfo.kt

@@ -17,6 +17,7 @@ import com.unciv.logic.trade.TradeOffer
 import com.unciv.logic.trade.TradeType
 import com.unciv.models.ruleset.tile.ResourceSupplyList
 import com.unciv.models.ruleset.tile.ResourceType
+import com.unciv.models.ruleset.unit.BaseUnit
 import com.unciv.models.stats.Stats
 import com.unciv.ui.utils.withoutItem
 import java.util.*
@@ -582,5 +583,18 @@ class CityInfo {
         for(otherCiv in civsWithCloseCities)
             otherCiv.getDiplomacyManager(civInfo).setFlag(DiplomacyFlags.SettledCitiesNearUs,30)
     }
+
+    fun canPurchase(construction : IConstruction) : Boolean {
+        if (construction is BaseUnit)
+        {
+            val tile = getCenterTile()
+            if (construction.unitType.isCivilian())
+                return tile.civilianUnit == null
+            if (construction.unitType.isAirUnit())
+                return tile.airUnits.filter { !it.isTransported }.size < 6
+            else return tile.militaryUnit == null
+        }
+        return true
+    }
     //endregion
 }

core/src/com/unciv/logic/city/IConstruction.kt

@@ -10,7 +10,7 @@ interface IConstruction : INamed {
     fun getGoldCost(civInfo: CivilizationInfo): Int
     fun isBuildable(construction: CityConstructions): Boolean
     fun shouldBeDisplayed(construction: CityConstructions): Boolean
-    fun postBuildEvent(construction: CityConstructions): Boolean  // Yes I'm hilarious.
+    fun postBuildEvent(construction: CityConstructions, wasBought: Boolean = false): Boolean  // Yes I'm hilarious.
     fun canBePurchased(): Boolean
 }
 
@@ -61,7 +61,7 @@ open class SpecialConstruction(override var name: String, val description: Strin
         throw Exception("Impossible!")
     }
 
-    override fun postBuildEvent(construction: CityConstructions): Boolean {
+    override fun postBuildEvent(construction: CityConstructions, wasBought: Boolean): Boolean {
         throw Exception("Impossible!")
     }
 

core/src/com/unciv/models/ruleset/Building.kt

@@ -338,7 +338,7 @@ class Building : NamedStats(), IConstruction{
         return getRejectionReason(construction)==""
     }
 
-    override fun postBuildEvent(construction: CityConstructions): Boolean {
+    override fun postBuildEvent(construction: CityConstructions, wasBought: Boolean): Boolean {
         val civInfo = construction.cityInfo.civInfo
 
         if ("Spaceship part" in uniques) {

core/src/com/unciv/models/ruleset/unit/BaseUnit.kt

@@ -151,7 +151,7 @@ class BaseUnit : INamed, IConstruction {
         return getRejectionReason(construction) == ""
     }
 
-    override fun postBuildEvent(construction: CityConstructions): Boolean {
+    override fun postBuildEvent(construction: CityConstructions, wasBought: Boolean): Boolean {
         val unit = construction.cityInfo.civInfo.placeUnitNearTile(construction.cityInfo.location, name)
         if(unit==null) return false // couldn't place the unit, so there's actually no unit =(
 
@@ -165,6 +165,10 @@ class BaseUnit : INamed, IConstruction {
             && construction.cityInfo.containsBuildingUnique("All newly-trained melee, mounted, and armored units in this city receive the Drill I promotion"))
             unit.promotions.addPromotion("Drill I", isFree = true)
 
+        //movement penalty
+        if(!unit.hasUnique("Can move directly once bought") && wasBought)
+            unit.currentMovement = 0f
+
         return true
     }
 

core/src/com/unciv/ui/cityscreen/ConstructionsTable.kt

@@ -306,7 +306,9 @@ class ConstructionsTable(val cityScreen: CityScreen) : Table(CameraStageBaseScre
         if (construction == null || !construction.canBePurchased()
                 || !construction.isBuildable(cityConstructions)
                 || !UncivGame.Current.worldScreen.isPlayersTurn
-                || city.isPuppet || city.isInResistance()) {
+                || city.isPuppet || city.isInResistance()
+                || !city.canPurchase(construction)
+        ) {
             button.setText("Buy".tr())
             button.disable()
         } else {