feat(FalukantService, CreateBranchDialog): implement dynamic branch cost calculation

- Added new constants and methods in FalukantService to calculate branch action costs based on owned branch types, enhancing the cost management logic.
- Updated the CreateBranchDialog to utilize the new cost calculation, ensuring accurate display of branch creation costs based on user-owned branches.
- Improved the handling of branch type costs, allowing for a more flexible and responsive user experience when creating and upgrading branches.

backend/services/falukantService.js

@@ -106,6 +106,14 @@ async function getBranchOrFail(userId, branchId) {
     return branch;
 }
 
+const BRANCH_EXPANSION_EXPONENT = 1.2;
+const BRANCH_TYPE_COST_PRESSURE = {
+    production: { same: 1.15, other: 0.45 },
+    store: { same: 1.1, other: 0.5 },
+    fullstack: { same: 1.35, other: 0.7 },
+    default: { same: 1.05, other: 0.5 },
+};
+
 const POLITICAL_OFFICE_RANKS = {
     assessor: 1,
     councillor: 1,
@@ -572,6 +580,22 @@ class FalukantService extends BaseService {
         { tr: "drunkOfLife", method: "healthDrunkOfLife", cost: 5000000 }
     ];
 
+    _getBranchCostPressure(targetLabel) {
+        return BRANCH_TYPE_COST_PRESSURE[targetLabel] || BRANCH_TYPE_COST_PRESSURE.default;
+    }
+
+    _calculateBranchActionCost(baseCost, targetLabel, ownedTypeLabels = []) {
+        const normalizedTarget = String(targetLabel || '').trim().toLowerCase();
+        const { same, other } = this._getBranchCostPressure(normalizedTarget);
+        const weightedCount = ownedTypeLabels.reduce((sum, label) => {
+            const normalizedLabel = String(label || '').trim().toLowerCase();
+            return sum + (normalizedLabel === normalizedTarget ? same : other);
+        }, 0);
+        const exponentBase = Math.max(1, 1 + weightedCount);
+        const rawCost = Number(baseCost || 0) * Math.pow(exponentBase, BRANCH_EXPANSION_EXPONENT);
+        return Math.round(rawCost * 100) / 100;
+    }
+
     static RECURSIVE_REGION_SEARCH = `
         WITH RECURSIVE ancestors AS (
           SELECT
@@ -1258,12 +1282,15 @@ class FalukantService extends BaseService {
         if (!branchType) {
             throw new Error(`Unknown branchTypeId ${branchTypeId}`);
         }
-        const existingCount = await Branch.count({
-            where: { falukantUserId: user.id }
+        const existingBranches = await Branch.findAll({
+            where: { falukantUserId: user.id },
+            include: [{ model: BranchType, as: 'branchType', attributes: ['labelTr'] }],
+            attributes: ['id']
         });
-        const exponentBase = Math.max(existingCount, 1);
-        const rawCost = branchType.baseCost * Math.pow(exponentBase, 1.2);
-        const cost = Math.round(rawCost * 100) / 100;
+        const ownedTypeLabels = existingBranches
+            .map((branch) => branch.branchType?.labelTr)
+            .filter(Boolean);
+        const cost = this._calculateBranchActionCost(branchType.baseCost, branchType.labelTr, ownedTypeLabels);
         if (user.money < cost) {
             throw new PreconditionError('insufficientFunds');
         }
@@ -1283,7 +1310,18 @@ class FalukantService extends BaseService {
     async getBranchTypes(hashedUserId) {
         const user = await getFalukantUserOrFail(hashedUserId);
         const branchTypes = await BranchType.findAll();
-        return branchTypes;
+        const ownedBranches = await Branch.findAll({
+            where: { falukantUserId: user.id },
+            include: [{ model: BranchType, as: 'branchType', attributes: ['labelTr'] }],
+            attributes: ['id']
+        });
+        const ownedTypeLabels = ownedBranches
+            .map((branch) => branch.branchType?.labelTr)
+            .filter(Boolean);
+        return branchTypes.map((branchType) => ({
+            ...branchType.get({ plain: true }),
+            createCost: this._calculateBranchActionCost(branchType.baseCost, branchType.labelTr, ownedTypeLabels),
+        }));
 
     }
 
@@ -1311,7 +1349,7 @@ class FalukantService extends BaseService {
         const user = await getFalukantUserOrFail(hashedUserId);
         const branch = await Branch.findOne({
             where: { id: branchId, falukantUserId: user.id },
-            include: [{ model: BranchType, as: 'branchType', attributes: ['id', 'labelTr'] }],
+            include: [{ model: BranchType, as: 'branchType', attributes: ['id', 'labelTr', 'baseCost'] }],
         });
         if (!branch) {
             throw new Error('Branch not found');
@@ -1333,8 +1371,25 @@ class FalukantService extends BaseService {
         if (!targetType) {
             throw new Error(`Target branch type '${targetLabel}' not found`);
         }
-
-        // Für den Moment ohne zusätzliche Kosten – kann später erweitert werden
+        const ownedBranches = await Branch.findAll({
+            where: { falukantUserId: user.id },
+            include: [{ model: BranchType, as: 'branchType', attributes: ['labelTr'] }],
+            attributes: ['id']
+        });
+        const ownedTypeLabels = ownedBranches
+            .filter((entry) => entry.id !== branch.id)
+            .map((entry) => entry.branchType?.labelTr)
+            .filter(Boolean);
+        const baseUpgradeCost = Math.max(targetType.baseCost - (branch.branchType?.baseCost || 0), targetType.baseCost * 0.6);
+        const upgradeCost = this._calculateBranchActionCost(baseUpgradeCost, targetType.labelTr, ownedTypeLabels);
+        if (user.money < upgradeCost) {
+            throw new PreconditionError('insufficientFunds');
+        }
+        await updateFalukantUserMoney(
+            user.id,
+            -upgradeCost,
+            'upgrade_branch'
+        );
         branch.branchTypeId = targetType.id;
         await branch.save();