Demanding tribute from city states (#4976)

* tribute willingness calculations

* implement demanding gold and workers

* Revisions

* unit power calculation

* show modifiers in the diplo screen

* template.properties

* G&K modifiers

* promotions start at 0

* notiifications, AI

* conflict

* conflict?

* template and translation, failing test?

* another missing string

* missing space

* afraid relationship status

* missing space 2

* Slight optimization

* optimization pt 2

* reviews

android/assets/jsons/translations/Swedish.properties

@@ -104,6 +104,7 @@ We promised not to settle near them ([count] turns remaining) = Vi lovade att in
 They promised not to settle near us ([count] turns remaining) = De lovade att inte bygga städer nära oss ([count] drag kvar)
          
 Unforgivable = Oförlåtlig
+Afraid = Rädd
 Enemy = Fiende
 Competitor = Konkurrent
 Neutral = Neutral
@@ -173,6 +174,7 @@ Personality = Personlighet
 Influence = Inflytande
 Reach 30 for friendship. = Nå 30 för vänskap.
 Reach highest influence above 60 for alliance. = Nå högsta inflytande över 60 för allians.
+
  # Requires translation!
 When Friends: = 
  # Requires translation!
@@ -180,6 +182,27 @@ When Allies: =
  # Requires translation!
 The unique luxury is one of: = 
 
+Demand Tribute = Kräv Brandskatt
+Tribute Willingness = Brandskattsvillighet
+>0 to take gold, >30 and size 4 city for worker = >0 för att ta guld, >30 och stad av storlek 4 för arbetare
+Major Civ = Stor Civilisation
+No Cities = Inga Städer
+Base value = Grundvärde
+Has Ally = Har Allierad
+Has Protector = Har Beskyddare
+Demanding a Worker = Kräver Arbetare
+Demanding a Worker from small City-State = Kräver Arbetare från liten Stadsstat
+Very recently paid tribute = Alldeles nyss brandskattad
+Recently paid tribute = Nyligen brandskattad
+Influence below -30 = Inflytande under -30
+Military Rank = Militär Rangordning
+Military near City-State = Militär nära Stadsstaten
+Sum: = Summa:
+Take [amount] gold (-15 Influence) = Ta [amount] guld (-15 Inflytande)
+Take worker (-50 Influence) = Ta arbetare (-50 Inflytande)
+[civName] is afraid of your military power! = [civName] är rädd för din militära makt!
+
+
 # Trades 
 
 Trade = Handelsavtal

android/assets/jsons/translations/template.properties

@@ -104,6 +104,7 @@ We promised not to settle near them ([count] turns remaining) =
 They promised not to settle near us ([count] turns remaining) = 
          
 Unforgivable = 
+Afraid = 
 Enemy = 
 Competitor = 
 Neutral = 
@@ -178,6 +179,27 @@ When Friends: =
 When Allies: = 
 The unique luxury is one of: = 
 
+Demand Tribute = 
+Tribute Willingness = 
+>0 to take gold, >30 and size 4 city for worker = 
+Major Civ = 
+No Cities = 
+Base value = 
+Has Ally = 
+Has Protector = 
+Demanding a Worker = 
+Demanding a Worker from small City-State = 
+Very recently paid tribute = 
+Recently paid tribute = 
+Influence below -30 = 
+Military Rank = 
+Military near City-State = 
+Sum: = 
+Take [amount] gold (-15 Influence) = 
+Take worker (-50 Influence) = 
+[civName] is afraid of your military power! = 
+
+
 # Trades 
 
 Trade = 

core/src/com/unciv/logic/automation/NextTurnAutomation.kt

@@ -16,6 +16,7 @@ import com.unciv.logic.trade.*
 import com.unciv.models.ruleset.ModOptionsConstants
 import com.unciv.models.ruleset.VictoryType
 import com.unciv.models.ruleset.tech.Technology
+import com.unciv.models.ruleset.tile.ResourceType
 import com.unciv.models.ruleset.unit.BaseUnit
 import com.unciv.models.stats.Stat
 import com.unciv.models.translations.tr
@@ -49,7 +50,10 @@ object NextTurnAutomation {
         chooseTechToResearch(civInfo)
         automateCityBombardment(civInfo)
         useGold(civInfo)
-        protectCityStates(civInfo)
+        if (!civInfo.isCityState()) {
+            protectCityStates(civInfo)
+            bullyCityStates(civInfo)
+        }
         automateUnits(civInfo)  // this is the most expensive part
         reassignWorkedTiles(civInfo)  // second most expensive
         trainSettler(civInfo)
@@ -114,29 +118,19 @@ object NextTurnAutomation {
 
     /** allow AI to spend money to purchase city-state friendship, buildings & unit */
     private fun useGold(civInfo: CivilizationInfo) {
-        if (civInfo.victoryType() == VictoryType.Cultural) {
-            for (cityState in civInfo.getKnownCivs()
-                    .filter { it.isCityState() && it.cityStateType == CityStateType.Cultured }) {
-                val diploManager = cityState.getDiplomacyManager(civInfo)
-                if (diploManager.influence < 40) { // we want to gain influence with them
+
+        if (!civInfo.isCityState()) {
+            val potentialAllies = civInfo.getKnownCivs().filter { it.isCityState() }
+            if (potentialAllies.isNotEmpty()) {
+                val cityState =
+                    potentialAllies.maxByOrNull { valueCityStateAlliance(civInfo, it) }!!
+                if (cityState.getAllyCiv() != civInfo.civName && valueCityStateAlliance(civInfo, cityState) > 0) {
                     tryGainInfluence(civInfo, cityState)
                     return
                 }
             }
         }
 
-        if (civInfo.getHappiness() < 5) {
-            for (cityState in civInfo.getKnownCivs()
-                    .filter { it.isCityState() && it.cityStateType == CityStateType.Mercantile }) {
-                val diploManager = cityState.getDiplomacyManager(civInfo)
-                if (diploManager.influence < 40) { // we want to gain influence with them
-                    tryGainInfluence(civInfo, cityState)
-                    return
-                }
-            }
-        }
-
-
         for (city in civInfo.cities.sortedByDescending { it.population.population }) {
             val construction = city.cityConstructions.getCurrentConstruction()
             if (construction is PerpetualConstruction) continue
@@ -147,6 +141,47 @@ object NextTurnAutomation {
         }
     }
 
+    private fun valueCityStateAlliance(civInfo: CivilizationInfo, cityState: CivilizationInfo): Int {
+        var value = 0
+        if (!cityState.isAlive() || cityState.cities.isEmpty())
+            return value
+
+        if (civInfo.victoryType() == VictoryType.Cultural && cityState.canGiveStat(Stat.Culture)) {
+            value += 10
+        }
+        else if (civInfo.victoryType() == VictoryType.Scientific && cityState.canGiveStat(Stat.Science)) {
+            // In case someone mods this in
+            value += 10
+        }
+        else if (civInfo.victoryType() == VictoryType.Domination) {
+            // Don't ally close city-states, conquer them instead
+            val distance = getMinDistanceBetweenCities(civInfo, cityState)
+            if (distance < 20)
+                value -= (20 - distance) / 4
+        }
+        if (civInfo.gold < 100) {
+            // Consider bullying for cash
+            value -= 5
+        }
+        if (civInfo.getHappiness() < 5 && cityState.canGiveStat(Stat.Happiness)) {
+            value += 10 - civInfo.getHappiness()
+        }
+        if (civInfo.getHappiness() > 5 && cityState.canGiveStat(Stat.Food)) {
+            value += 5
+        }
+        if (cityState.getAllyCiv() != null && cityState.getAllyCiv() != civInfo.civName) {
+            // easier not to compete if a third civ has this locked down
+            val thirdCivInfluence = cityState.getDiplomacyManager(cityState.getAllyCiv()!!).influence.toInt()
+            value -= (thirdCivInfluence - 60) / 10
+        }
+
+        // Bonus for luxury resources we can get from them
+        value += cityState.detailedCivResources.count { it.resource.resourceType == ResourceType.Luxury
+                && !(it.resource in civInfo.detailedCivResources) }
+
+        return value
+    }
+
     private fun protectCityStates(civInfo: CivilizationInfo) {
         for (state in civInfo.getKnownCivs().filter{!it.isDefeated() && it.isCityState()}) {
             val diplomacyManager = state.getDiplomacyManager(civInfo.civName)
@@ -161,6 +196,21 @@ object NextTurnAutomation {
         }
     }
 
+    private fun bullyCityStates(civInfo: CivilizationInfo) {
+        for (state in civInfo.getKnownCivs().filter{!it.isDefeated() && it.isCityState()}) {
+            val diplomacyManager = state.getDiplomacyManager(civInfo.civName)
+            if(diplomacyManager.relationshipLevel() < RelationshipLevel.Friend
+                    && diplomacyManager.diplomaticStatus == DiplomaticStatus.Peace
+                    && valueCityStateAlliance(civInfo, state) <= 0
+                    && state.getTributeWillingness(civInfo) > 0) {
+                if (state.getTributeWillingness(civInfo, demandingWorker = true) > 0)
+                    civInfo.demandWorker(state)
+                else
+                    civInfo.demandGold(state)
+            }
+        }
+    }
+
     private fun getFreeTechForCityStates(civInfo: CivilizationInfo) {
         // City-States automatically get all techs that at least half of the major civs know
         val researchableTechs = civInfo.gameInfo.ruleSet.technologies.keys

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

@@ -1,6 +1,7 @@
 package com.unciv.logic.city
 
 import com.badlogic.gdx.math.Vector2
+import com.unciv.logic.battle.CityCombatant
 import com.unciv.logic.civilization.CivilizationInfo
 import com.unciv.logic.civilization.GreatPersonManager
 import com.unciv.logic.civilization.ReligionState
@@ -22,6 +23,7 @@ import kotlin.collections.HashMap
 import kotlin.collections.HashSet
 import kotlin.math.ceil
 import kotlin.math.min
+import kotlin.math.pow
 import kotlin.math.roundToInt
 
 class CityInfo {
@@ -673,6 +675,11 @@ class CityInfo {
         return !isOriginalCapital && !isHolyCity() && (!isCapital() || justCaptured)
     }
 
+    fun getForceEvaluation(): Int {
+        // Same as for units, so higher values count more
+        return CityCombatant(this).getCityStrength().toFloat().pow(1.5f).toInt()
+    }
+
 
     fun getNeighbouringCivs(): List<String> {
         val tilesList: HashSet<TileInfo> = getTiles().toHashSet()
@@ -688,7 +695,7 @@ class CityInfo {
             .distinct().toList()
     }
     fun getImprovableTiles(): Sequence<TileInfo> = getTiles()
-            .filter {it.hasViewableResource(civInfo) && it.improvement == null}
-    
+        .filter {it.hasViewableResource(civInfo) && it.improvement == null}
+           
     //endregion
-}
+}

core/src/com/unciv/logic/civilization/CivilizationInfo.kt

@@ -7,11 +7,13 @@ import com.unciv.logic.GameInfo
 import com.unciv.logic.UncivShowableException
 import com.unciv.logic.automation.NextTurnAutomation
 import com.unciv.logic.automation.WorkerAutomation
+import com.unciv.logic.battle.CityCombatant
 import com.unciv.logic.city.CityInfo
 import com.unciv.logic.civilization.RuinsManager.RuinsManager
 import com.unciv.logic.civilization.diplomacy.DiplomacyFlags
 import com.unciv.logic.civilization.diplomacy.DiplomacyManager
 import com.unciv.logic.civilization.diplomacy.DiplomaticStatus
+import com.unciv.logic.civilization.diplomacy.RelationshipLevel
 import com.unciv.logic.map.MapUnit
 import com.unciv.logic.map.TileInfo
 import com.unciv.logic.map.UnitMovementAlgorithms
@@ -26,14 +28,20 @@ import com.unciv.models.ruleset.tile.TileResource
 import com.unciv.models.ruleset.unit.BaseUnit
 import com.unciv.models.stats.Stat
 import com.unciv.models.stats.Stats
+import com.unciv.models.translations.getPlaceholderParameters
+import com.unciv.models.translations.getPlaceholderText
 import com.unciv.models.translations.tr
 import com.unciv.ui.victoryscreen.RankingType
 import java.util.*
 import kotlin.collections.ArrayList
 import kotlin.collections.HashMap
+import kotlin.collections.LinkedHashMap
+import kotlin.math.max
 import kotlin.math.min
 import kotlin.math.pow
 import kotlin.math.roundToInt
+import kotlin.system.measureNanoTime
+import kotlin.system.measureTimeMillis
 
 class CivilizationInfo {
 
@@ -977,6 +985,156 @@ class CivilizationInfo {
         }
     }
 
+    fun getTributeWillingness(demandingCiv: CivilizationInfo, demandingWorker: Boolean = false): Int {
+        return getTributeModifiers(demandingCiv, demandingWorker).values.sum()
+    }
+
+    fun getTributeModifiers(demandingCiv: CivilizationInfo, demandingWorker: Boolean = false, requireWholeList: Boolean = false): HashMap<String, Int> {
+        val modifiers = LinkedHashMap<String, Int>()    // Linked to preserve order when presenting the modifiers table
+        // Can't bully major civs or unsettled CS's
+        if (!isCityState()) {
+            modifiers["Major Civ"] = -999
+            return modifiers
+        }
+        if (cities.isEmpty()) {
+            modifiers["No Cities"] = -999
+            return  modifiers
+        }
+
+        modifiers["Base value"] = -110
+
+        if (cityStatePersonality == CityStatePersonality.Hostile)
+            modifiers["Hostile"] = -10
+        if (cityStateType == CityStateType.Militaristic)
+            modifiers["Militaristic"] = -10
+        if (allyCivName != null && allyCivName != demandingCiv.civName)
+            modifiers["Has Ally"] = -10
+        if (getProtectorCivs().any { it != demandingCiv })
+            modifiers["Has Protector"] = -20
+        if (demandingWorker)
+            modifiers["Demanding a Worker"] = -30
+        if (demandingWorker && getCapital().population.population < 4)
+            modifiers["Demanding a Worker from small City-State"] = -300
+        val recentBullying = flagsCountdown[CivFlags.RecentlyBullied.name]
+        if (recentBullying != null && recentBullying > 10)
+            modifiers["Very recently paid tribute"] = -300
+        else if (recentBullying != null)
+            modifiers["Recently paid tribute"] = -40
+        if (getDiplomacyManager(demandingCiv).influence < -30)
+            modifiers["Influence below -30"] = -300
+
+        // Slight optimization, we don't do the expensive stuff if we have no chance of getting a positive result
+        if (!requireWholeList && modifiers.values.sum() <= -200)
+            return modifiers
+
+        val forceRank = gameInfo.getAliveMajorCivs().sortedByDescending { it.getStatForRanking(RankingType.Force) }.indexOf(demandingCiv)
+        modifiers["Military Rank"] = 100 - ((100 / gameInfo.gameParameters.players.size) * forceRank)
+
+        if (!requireWholeList && modifiers.values.sum() <= -100)
+            return modifiers
+
+        val bullyRange = max(5, gameInfo.tileMap.tileMatrix.size / 10)   // Longer range for larger maps
+        val inRangeTiles = getCapital().getCenterTile().getTilesInDistanceRange(1..bullyRange)
+        val forceNearCity = inRangeTiles
+            .sumBy { if (it.militaryUnit?.civInfo == demandingCiv)
+                it.militaryUnit!!.getForceEvaluation()
+            else 0
+            }
+        val csForce = getCapital().getForceEvaluation() + inRangeTiles
+            .sumBy { if (it.militaryUnit?.civInfo == this)
+                it.militaryUnit!!.getForceEvaluation()
+            else 0
+            }
+        val forceRatio = forceNearCity.toFloat() / csForce.toFloat()
+
+        modifiers["Military near City-State"] = when {
+            forceRatio > 3f -> 100
+            forceRatio > 2f -> 80
+            forceRatio > 1.5f -> 60
+            forceRatio > 1f -> 40
+            forceRatio > 0.5f -> 20
+            else -> 0
+        }
+
+        return modifiers
+    }
+
+    fun goldGainedByTribute(): Int {
+        // These values are close enough, linear increase throughout the game
+        var gold = when (gameInfo.gameParameters.gameSpeed) {
+            GameSpeed.Quick -> 60
+            GameSpeed.Standard -> 50
+            GameSpeed.Epic -> 35
+            GameSpeed.Marathon -> 30
+        }
+        val turnsToIncrement = when (gameInfo.gameParameters.gameSpeed) {
+            GameSpeed.Quick -> 5f
+            GameSpeed.Standard -> 6.5f
+            GameSpeed.Epic -> 14f
+            GameSpeed.Marathon -> 32f
+        }
+        gold += 5 * (gameInfo.turns / turnsToIncrement).toInt()
+
+        return gold
+    }
+
+    fun demandGold(cityState: CivilizationInfo) {
+        if (!cityState.isCityState()) throw Exception("You can only demand gold from City-States!")
+        val goldAmount = goldGainedByTribute()
+        addGold(goldAmount)
+        cityState.getDiplomacyManager(this).influence -= 15
+        cityState.addFlag(CivFlags.RecentlyBullied.name, 20)
+        cityState.updateAllyCivForCityState()
+        updateStatsForNextTurn()
+    }
+
+    fun demandWorker(cityState: CivilizationInfo) {
+        if (!cityState.isCityState()) throw Exception("You can only demand workers from City-States!")
+
+        val buildableWorkerLikeUnits = gameInfo.ruleSet.units.filter {
+            it.value.uniqueObjects.any { it.placeholderText == Constants.canBuildImprovements }
+                    && it.value.isBuildable(this)
+                    && it.value.isCivilian()
+        }
+        if (buildableWorkerLikeUnits.isEmpty()) return  // Bad luck?
+        placeUnitNearTile(cityState.getCapital().location, buildableWorkerLikeUnits.keys.random())
+
+        cityState.getDiplomacyManager(this).influence -= 50
+        cityState.addFlag(CivFlags.RecentlyBullied.name, 20)
+        cityState.updateAllyCivForCityState()
+    }
+
+    fun canGiveStat(statType: Stat): Boolean {
+        if (!isCityState())
+            return false
+        val eraInfo = getEraObject()
+        val bonuses = if (eraInfo == null) null
+            else eraInfo.allyBonus[cityStateType.name]
+        if (bonuses != null) {
+            // Defined city states in json
+            bonuses.addAll(eraInfo!!.friendBonus[cityStateType.name]!!)
+            for (bonus in bonuses) {
+                if (statType == Stat.Happiness && bonus.getPlaceholderText() == "Provides [] Happiness")
+                    return true
+                if (bonus.getPlaceholderText() == "Provides [] [] per turn" && bonus.getPlaceholderParameters()[1] == statType.name)
+                    return true
+                if (bonus.getPlaceholderText() == "Provides [] [] []" && bonus.getPlaceholderParameters()[1] == statType.name)
+                    return true
+            }
+
+        } else {
+            // compatibility mode
+            return when {
+                cityStateType == CityStateType.Mercantile && statType == Stat.Happiness -> true
+                cityStateType == CityStateType.Cultured && statType == Stat.Culture -> true
+                cityStateType == CityStateType.Maritime && statType == Stat.Food -> true
+                else -> false
+            }
+        }
+
+        return false
+    }
+
     //endregion
 }
 
@@ -993,4 +1151,5 @@ enum class CivFlags {
     TurnsTillNextDiplomaticVote,
     ShowDiplomaticVotingResults,
     ShouldResetDiplomaticVotes,
+    RecentlyBullied
 }

core/src/com/unciv/logic/civilization/diplomacy/DiplomacyManager.kt

@@ -14,6 +14,7 @@ import kotlin.math.min
 
 enum class RelationshipLevel{
     Unforgivable,
+    Afraid,
     Enemy,
     Competitor,
     Neutral,
@@ -35,7 +36,8 @@ enum class DiplomacyFlags{
     AgreedToNotSettleNearUs,
     IgnoreThemSettlingNearUs,
     ProvideMilitaryUnit,
-    EverBeenFriends
+    EverBeenFriends,
+    NotifiedAfraid
 }
 
 enum class DiplomaticModifiers{
@@ -142,6 +144,7 @@ class DiplomacyManager() {
 
         if (civInfo.isCityState()) {
             if (influence <= -30 || civInfo.isAtWarWith(otherCiv())) return RelationshipLevel.Unforgivable
+            if (influence < 30 && civInfo.getTributeWillingness(otherCiv()) > 0) return RelationshipLevel.Afraid
             if (influence < 0) return RelationshipLevel.Enemy
             if (influence >= 60 && civInfo.getAllyCiv() == otherCivName) return RelationshipLevel.Ally
             if (influence >= 30) return RelationshipLevel.Friend
@@ -400,6 +403,16 @@ class DiplomacyManager() {
                 if (civCapitalLocation != null) otherCiv().addNotification(text, civCapitalLocation, civInfo.civName, NotificationIcon.Diplomacy)
                 else otherCiv().addNotification(text, civInfo.civName, NotificationIcon.Diplomacy)
             }
+
+            // Potentially notify about afraid status
+            if (influence < 30  // We usually don't want to bully our friends
+            && !hasFlag(DiplomacyFlags.NotifiedAfraid)
+            && civInfo.getTributeWillingness(otherCiv()) > 0) {
+                setFlag(DiplomacyFlags.NotifiedAfraid, 20)  // Wait 20 turns until next reminder
+                val text = "[${civInfo.civName}] is afraid of your military power!"
+                if (civCapitalLocation != null) otherCiv().addNotification(text, civCapitalLocation, civInfo.civName, NotificationIcon.Diplomacy)
+                else otherCiv().addNotification(text, civInfo.civName, NotificationIcon.Diplomacy)
+            }
         }
     }
 

core/src/com/unciv/logic/map/MapUnit.kt

@@ -16,6 +16,7 @@ import com.unciv.models.ruleset.unit.BaseUnit
 import com.unciv.models.ruleset.unit.UnitType
 import com.unciv.ui.utils.toPercent
 import java.text.DecimalFormat
+import kotlin.math.pow
 
 /**
  * The immutable properties and mutable game state of an individual unit present on the map
@@ -985,5 +986,13 @@ class MapUnit {
         if (isPreparingParadrop()) action = null
     }
 
+    fun getForceEvaluation(): Int {
+        val promotionBonus = (promotions.numberOfPromotions + 1).toFloat().pow(0.3f)
+        var power = (baseUnit.getForceEvaluation() * promotionBonus).toInt()
+        power *= health
+        power /= 100
+        return power
+    }
+
     //endregion
 }

core/src/com/unciv/logic/trade/TradeEvaluation.kt

@@ -243,7 +243,7 @@ class TradeEvaluation {
                         RelationshipLevel.Unforgivable -> 10000
                         RelationshipLevel.Enemy -> 2000
                         RelationshipLevel.Competitor -> 500
-                        RelationshipLevel.Neutral -> 200
+                        RelationshipLevel.Neutral, RelationshipLevel.Afraid -> 200
                         RelationshipLevel.Favorable, RelationshipLevel.Friend, RelationshipLevel.Ally -> 100
                     }
                 }

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

@@ -19,6 +19,7 @@ import java.util.*
 import kotlin.collections.ArrayList
 import kotlin.collections.HashMap
 import kotlin.collections.HashSet
+import kotlin.math.pow
 
 // This is BaseUnit because Unit is already a base Kotlin class and to avoid mixing the two up
 
@@ -55,6 +56,9 @@ class BaseUnit : INamed, INonPerpetualConstruction, ICivilopediaText {
     var uniqueTo: String? = null
     var attackSound: String? = null
 
+    @Transient
+    var cachedForceEvaluation: Int = -1
+
     lateinit var ruleset: Ruleset
 
     override var civilopediaText = listOf<FormattedLine>()
@@ -444,4 +448,78 @@ class BaseUnit : INamed, INonPerpetualConstruction, ICivilopediaText {
             && (uniqueObjects + getType().uniqueObjects)
                 .any { it.placeholderText == "+[]% Strength vs []" && it.params[1] == "City" }
         )
+
+    fun getForceEvaluation(): Int {
+        if (cachedForceEvaluation < 0)    evaluateForce()
+        return  cachedForceEvaluation
+    }
+
+    private fun evaluateForce() {
+        if (strength == 0 && rangedStrength == 0) {
+            cachedForceEvaluation = 0
+            return
+        }
+
+        var power = strength.toFloat().pow(1.5f).toInt()
+        var rangedPower = rangedStrength.toFloat().pow(1.45f).toInt()
+
+        // Value ranged naval units less
+        if (isWaterUnit()) {
+            rangedPower /= 2
+        }
+        if (rangedPower > 0)
+            power = rangedPower
+
+        // Replicates the formula from civ V, which is a lower multiplier than probably intended, because math
+        // They did fix it in BNW so it was completely bugged and always 1, again math
+        power = (power * movement.toFloat().pow(0.3f)).toInt()
+
+        if (uniqueObjects.any { it.placeholderText =="Self-destructs when attacking" } )
+            power /= 2
+        if (uniqueObjects.any { it.placeholderText =="Nuclear weapon of Strength []" } )
+            power += 4000
+
+        // Uniques
+        for (unique in uniqueObjects) {
+
+            when {
+                unique.placeholderText == "+[]% Strength vs []" && unique.params[1] == "City" // City Attack - half the bonus
+                    -> power += (power * unique.params[0].toInt()) / 200
+                unique.placeholderText == "+[]% Strength vs []" && unique.params[1] != "City" // Bonus vs something else - a quarter of the bonus
+                    -> power += (power * unique.params[0].toInt()) / 400
+                unique.placeholderText == "+[]% Strength when attacking" // Attack - half the bonus
+                    -> power += (power * unique.params[0].toInt()) / 200
+                unique.placeholderText == "+[]% Strength when defending" // Defense - half the bonus
+                    -> power += (power * unique.params[0].toInt()) / 200
+                unique.placeholderText == "May Paradrop up to [] tiles from inside friendly territory" // Paradrop - 25% bonus
+                    -> power += power / 4
+                unique.placeholderText == "Must set up to ranged attack" // Must set up - 20 % penalty
+                    -> power -= power / 5
+                unique.placeholderText == "+[]% Strength in []" // Bonus in terrain or feature - half the bonus
+                    -> power += (power * unique.params[0].toInt()) / 200
+            }
+        }
+
+        // Base promotions
+        for (promotionName in promotions) {
+            for (unique in ruleset.unitPromotions[promotionName]!!.uniqueObjects) {
+                when {
+                    unique.placeholderText == "+[]% Strength vs []" && unique.params[1] == "City" // City Attack - half the bonus
+                        -> power += (power * unique.params[0].toInt()) / 200
+                    unique.placeholderText == "+[]% Strength vs []" && unique.params[1] != "City" // Bonus vs something else - a quarter of the bonus
+                        -> power += (power * unique.params[0].toInt()) / 400
+                    unique.placeholderText == "+[]% Strength when attacking" // Attack - half the bonus
+                        -> power += (power * unique.params[0].toInt()) / 200
+                    unique.placeholderText == "+[]% Strength when defending" // Defense - half the bonus
+                        -> power += (power * unique.params[0].toInt()) / 200
+                    unique.placeholderText == "[] additional attacks per turn" // Extra attacks - 20% bonus per extra attack
+                        -> power += (power * unique.params[0].toInt()) / 5
+                    unique.placeholderText == "+[]% Strength in []" // Bonus in terrain or feature - half the bonus
+                        -> power += (power * unique.params[0].toInt()) / 200
+                }
+            }
+
+        }
+        cachedForceEvaluation = power
+    }
 }

core/src/com/unciv/ui/tilegroups/CityButton.kt

@@ -409,6 +409,7 @@ class CityButton(val city: CityInfo, private val tileGroup: WorldTileGroup): Tab
             val color = when (relationshipLevel) {
                 RelationshipLevel.Unforgivable -> Color.RED
                 RelationshipLevel.Enemy -> Color.ORANGE
+                RelationshipLevel.Afraid -> Color.YELLOW
                 RelationshipLevel.Neutral, RelationshipLevel.Friend -> Color.LIME
                 RelationshipLevel.Ally -> Color.SKY
                 else -> Color.DARK_GRAY

core/src/com/unciv/ui/trade/DiplomacyScreen.kt

@@ -239,6 +239,14 @@ class DiplomacyScreen(val viewingCiv:CivilizationInfo):CameraStageBaseScreen() {
             if (isNotPlayersTurn()) protectionButton.disable()
         }
 
+        val demandTributeButton = "Demand Tribute".toTextButton()
+        demandTributeButton.onClick {
+            rightSideTable.clear()
+            rightSideTable.add(ScrollPane(getDemandTributeTable(otherCiv)))
+        }
+        diplomacyTable.add(demandTributeButton).row()
+        if (isNotPlayersTurn()) demandTributeButton.disable()
+
         val diplomacyManager = viewingCiv.getDiplomacyManager(otherCiv)
         if (!viewingCiv.gameInfo.ruleSet.modOptions.uniques.contains(ModOptionsConstants.diplomaticRelationshipsCannotChange)) {
             if (viewingCiv.isAtWarWith(otherCiv)) {
@@ -384,6 +392,50 @@ class DiplomacyScreen(val viewingCiv:CivilizationInfo):CameraStageBaseScreen() {
 
     }
 
+    private fun getDemandTributeTable(otherCiv: CivilizationInfo): Table {
+        val diplomacyTable = getCityStateDiplomacyTableHeader(otherCiv)
+        diplomacyTable.addSeparator()
+        diplomacyTable.add("Tribute Willingness".toLabel()).row()
+        diplomacyTable.add(">0 to take gold, >30 and size 4 city for worker".toLabel()).row()
+        val modifierTable = Table()
+        val tributeModifiers = otherCiv.getTributeModifiers(viewingCiv, requireWholeList = true)
+        for (item in tributeModifiers) {
+            val color = if (item.value > 0) Color.GREEN else Color.RED
+            modifierTable.add(item.key.toLabel(color))
+            modifierTable.add(item.value.toString().toLabel(color)).row()
+        }
+        modifierTable.add("Sum:".toLabel())
+        modifierTable.add(tributeModifiers.values.sum().toLabel()).row()
+        diplomacyTable.add(modifierTable).row()
+        diplomacyTable.addSeparator()
+
+        val demandGoldButton = "Take [${otherCiv.goldGainedByTribute()}] gold (-15 Influence)".toTextButton()
+        demandGoldButton.onClick {
+            viewingCiv.demandGold(otherCiv)
+            rightSideTable.clear()
+            rightSideTable.add(ScrollPane(getCityStateDiplomacyTable(otherCiv)))
+        }
+        diplomacyTable.add(demandGoldButton).row()
+        if (otherCiv.getTributeWillingness(viewingCiv, demandingWorker = false) <= 0)   demandGoldButton.disable()
+
+        val demandWorkerButton = "Take worker (-50 Influence)".toTextButton()
+        demandWorkerButton.onClick {
+            viewingCiv.demandWorker(otherCiv)
+            rightSideTable.clear()
+            rightSideTable.add(ScrollPane(getCityStateDiplomacyTable(otherCiv)))
+        }
+        diplomacyTable.add(demandWorkerButton).row()
+        if (otherCiv.getTributeWillingness(viewingCiv, demandingWorker = true) <= 0)    demandWorkerButton.disable()
+
+        val backButton = "Back".toTextButton()
+        backButton.onClick {
+            rightSideTable.clear()
+            rightSideTable.add(ScrollPane(getCityStateDiplomacyTable(otherCiv)))
+        }
+        diplomacyTable.add(backButton)
+        return diplomacyTable
+    }
+
     private fun getQuestTable(assignedQuest: AssignedQuest): Table {
         val questTable = Table()
         questTable.defaults().pad(10f)
@@ -630,6 +682,7 @@ class DiplomacyScreen(val viewingCiv:CivilizationInfo):CameraStageBaseScreen() {
             RelationshipLevel.Neutral -> Color.WHITE
             RelationshipLevel.Favorable, RelationshipLevel.Friend,
             RelationshipLevel.Ally -> Color.GREEN
+            RelationshipLevel.Afraid -> Color.YELLOW
             else -> Color.RED
         }