Add tower upgrade functionality with cost and sprite updates

This commit implements tower upgrading mechanics by:
- Adding sprite and cost properties to all tower levels in towerConfig.js
- Implementing upgradeMenu() and upgradeTower() methods in TowerManager.js
- Adding interactive tower selection for upgrades
- Updating tower textures during upgrades
- Including gold cost validation for upgrades

The changes enable players to upgrade towers up to level 3, with appropriate cost increases and visual feedback through sprite changes.

src/support/towerConfig.js

@@ -12,6 +12,8 @@ export const TOWERS_CONFIG = {
             'range': 300
         },
         'level2': {
+            'sprite': 2,
+            'cost': 200,
             'dmgLow': 15,
             'dmgHigh': 35,
             'rate': 1500,
@@ -19,6 +21,8 @@ export const TOWERS_CONFIG = {
             'range': 350
         },
         'level3': {
+            'sprite': 4,
+            'cost': 400,
             'dmgLow': 25,
             'dmgHigh': 50,
             'rate': 1000,
@@ -40,16 +44,20 @@ export const TOWERS_CONFIG = {
             'aoe': 50,
         },
         'level2': {
-            'dmgLow': 25,
-            'dmgHigh': 45,
+            'sprite': 12,
+            'cost': 400,
+            'dmgLow': 28,
+            'dmgHigh': 60,
             'rate': 2500,
             'duration': 500,
             'range': 450,
             'aoe': 25,
         },
         'level3': {
+            'sprite': 14,
+            'cost': 800,
             'dmgLow': 35,
-            'dmgHigh': 65,
+            'dmgHigh': 90,
             'rate': 2500,
             'duration': 500,
             'range': 500,
@@ -70,16 +78,20 @@ export const TOWERS_CONFIG = {
             'aoe': 100,
         },
         'level2': {
-            'dmgLow': 3,
-            'dmgHigh': 8,
+            'sprite': 21,
+            'cost': 300,
+            'dmgLow': 2,
+            'dmgHigh': 10,
             'rate': 1000,
             'duration': 1000,
             'range': 350,
             'aoe': 100,
         },
         'level3': {
+            'sprite': 22,
+            'cost': 600,
             'dmgLow': 5,
-            'dmgHigh': 12,
+            'dmgHigh': 18,
             'rate': 1000,
             'duration': 1000,
             'range': 400,

src/support/towerManager.js

@@ -27,6 +27,10 @@ export class TowerManager {
         tower.id = uniqueId;
 
         this.scene.towers.add(tower);
+        tower.setInteractive();
+        tower.on('pointerdown', () => {
+            this.upgradeMenu(tower);    
+        });
 
         // Draw range circle
         const config = TOWERS_CONFIG[type].level1;
@@ -36,6 +40,22 @@ export class TowerManager {
         }
     }
 
+    upgradeMenu(tower) {
+        // TODO: update this asap.
+        const nextLevel = `level${tower.props.level+1}`;
+        if (this.scene.UIScene.interfaceManager.gold >= TOWERS_CONFIG[tower.props.type][nextLevel].cost){
+            this.upgradeTower(tower)
+        }
+    }
+
+    upgradeTower(tower) {
+
+        if (tower.props.level === 3) return;
+        tower.props.level++;
+        const newLevel = `level${tower.props.level}`
+        tower.setTexture('towers', TOWERS_CONFIG[tower.props.type][newLevel].sprite);
+    }
+
     update(time, delta) {
         // Iterate through all towers
         this.scene.towers.children.iterate((tower) => {