Refactor BuildingButton and gameStore to enhance upgrade logic. Introduced methods for calculating upgrade costs and checking upgrade eligibility directly from the store. Updated tooltip messages for better user feedback on upgrade conditions, improving overall gameplay experience.

src/components/BuildingButton.tsx

@@ -71,20 +71,36 @@ export function BuildingButton({
   buildingType,
   levelRequirement
 }: BuildingButtonProps) {
-  const { points, playerLevel, upgradeBuilding } = useGameStore()
+  const { 
+    points, 
+    playerLevel, 
+    upgradeBuilding, 
+    canUpgradeBuilding,
+    getBuildingUpgradeCost
+  } = useGameStore()
+  
   const canAfford = points >= cost
   const meetsLevelRequirement = playerLevel >= levelRequirement
   const isDisabledStyle = !canAfford || !meetsLevelRequirement
 
-  // Calculate upgrade cost
-  const calculateUpgradeCost = (currentLevel: number): number => {
-    return Math.floor(cost * Math.pow(1.5, currentLevel - 1))
-  }
+  // Get upgrade cost from the store's actual calculation
+  // This ensures the displayed cost matches the actual cost used in the upgrade function
+  const upgradeCost = getBuildingUpgradeCost(buildingType as keyof typeof buildingImages)
   
-  const upgradeCost = calculateUpgradeCost(level)
-  const canUpgrade = points >= upgradeCost && owned > 0
+  // Use the game store's method to determine if upgrade is possible
+  const canUpgrade = canUpgradeBuilding(buildingType as keyof typeof buildingImages)
   const pointsPerSecond = production.points || 0
 
+  // Create a helpful tooltip message
+  const getUpgradeTooltip = () => {
+    if (owned === 0) {
+      return "You need to own this building first";
+    } else if (points < upgradeCost) {
+      return `Not enough points (${points}/${upgradeCost})`;
+    }
+    return `Upgrade to level ${level + 1}`;
+  };
+
   return (
     <Box
       bg="gray.700"
@@ -171,9 +187,9 @@ export function BuildingButton({
           >
             Buy ({cost} points)
           </Button>
-          <Tooltip label={owned === 0 ? "You need to own this building first" : ""}>
+          <Tooltip label={getUpgradeTooltip()}>
             <Button 
-              onClick={() => upgradeBuilding(buildingType as any)}
+              onClick={() => upgradeBuilding(buildingType as keyof typeof buildingImages)}
               opacity={!canUpgrade ? 0.4 : 1}
               _hover={{ bg: 'green.600', opacity: !canUpgrade ? 0.4 : 1 }}
               cursor={!canUpgrade ? 'not-allowed' : 'pointer'}

src/store/gameStore.ts

@@ -72,6 +72,8 @@ interface GameState {
   tick: () => void
   upgradeBuilding: (buildingType: BuildingType) => void
   getClickPowerUpgradeCost: () => number
+  canUpgradeBuilding: (buildingType: BuildingType) => boolean
+  getBuildingUpgradeCost: (buildingType: BuildingType) => number
 
   // New getter for available buildings
   getAvailableBuildings: () => BuildingInfo[]
@@ -315,7 +317,14 @@ const calculateUpgradeCost = (buildingType: BuildingType, currentLevel: number):
   const tier = getBuildingTier(buildingType)
   const multiplier = getTierMultiplier(tier)
   
-  return Math.floor(baseCost * Math.pow(multiplier, currentLevel - 1))
+  // Formula: baseCost * multiplier^(currentLevel - 1)
+  // This ensures costs scale exponentially with level
+  const cost = Math.floor(baseCost * Math.pow(multiplier, currentLevel - 1))
+  
+  // For debugging
+  console.log(`Upgrade cost for ${buildingType} at level ${currentLevel}: ${cost} points, tier: ${tier}, multiplier: ${multiplier}`)
+  
+  return cost
 }
 
 // Calculate building production based on level, count, and tier
@@ -422,10 +431,41 @@ export const useGameStore = create<GameState>()(
         return calculateClickPowerUpgradeCost(clickPowerUpgrades)
       },
 
+      getBuildingUpgradeCost: (buildingType: BuildingType) => {
+        const state = get()
+        const currentLevel = state[`${buildingType}Level` as keyof GameState] as number
+        return calculateUpgradeCost(buildingType, currentLevel)
+      },
+
+      canUpgradeBuilding: (buildingType: BuildingType) => {
+        const state = get()
+        // Check if player owns at least one building
+        if (state[buildingType] <= 0) {
+          return false
+        }
+        
+        // Get current level and calculate upgrade cost
+        const currentLevel = state[`${buildingType}Level` as keyof GameState] as number
+        const cost = calculateUpgradeCost(buildingType, currentLevel)
+        
+        // Check if player has enough points
+        return state.points >= cost
+      },
+
       upgradeBuilding: (buildingType: BuildingType) => {
         const state = get()
         const currentLevel = state[`${buildingType}Level` as keyof GameState] as number
         const cost = calculateUpgradeCost(buildingType, currentLevel)
+        const ownedCount = state[buildingType]
+        
+        console.log(`Attempting to upgrade ${buildingType}: 
+          - Current level: ${currentLevel}
+          - Upgrade cost: ${cost}
+          - Player points: ${state.points}
+          - Buildings owned: ${ownedCount}
+          - Can afford: ${state.points >= cost}
+          - Owns building: ${ownedCount > 0}
+        `)
         
         if (state.points >= cost && state[buildingType] > 0) {
           // Play upgrade sound instead of purchase sound
@@ -440,12 +480,17 @@ export const useGameStore = create<GameState>()(
             const newProduction = calculateProduction(buildingType, newLevel, count)
             const productionDifference = newProduction - oldProduction
             
+            console.log(`Upgrade successful! New level: ${newLevel}, Production increase: +${productionDifference}/s`)
+            
             return {
               points: state.points - cost,
               [`${buildingType}Level`]: newLevel,
               pointsPerSecond: state.pointsPerSecond + productionDifference,
             }
           })
+        } else {
+          // Log why upgrade failed
+          console.warn(`Upgrade failed! ${state.points < cost ? 'Not enough points' : 'No buildings owned'}`)
         }
       },