multi-currency support in roi calculator

hub/services/static/js/roi-calculator/roi-calculator-app.js

@@ -210,6 +210,85 @@ class ROICalculatorApp {
         }
     }
 
+    updateCurrency(value) {
+        try {
+            const currencyElement = document.getElementById('currency');
+            if (currencyElement) {
+                currencyElement.value = value;
+            }
+
+            // Update all currency-related UI labels
+            this.updateCurrencyLabels(value);
+
+            // Update calculations to reflect new currency formatting
+            this.updateCalculations();
+        } catch (error) {
+            console.error('Error updating currency:', error);
+        }
+    }
+
+    updateCurrencyLabels(currency) {
+        try {
+            // Update investment amount prefix
+            const investmentPrefix = document.getElementById('investment-currency-prefix');
+            if (investmentPrefix) {
+                investmentPrefix.textContent = currency;
+            }
+
+            // Update investment min/max labels
+            const investmentMinLabel = document.getElementById('investment-min-label');
+            if (investmentMinLabel) {
+                investmentMinLabel.textContent = `${currency} 100K`;
+            }
+            
+            const investmentMaxLabel = document.getElementById('investment-max-label');
+            if (investmentMaxLabel) {
+                investmentMaxLabel.textContent = `${currency} 2M`;
+            }
+
+            // Update revenue per instance suffix
+            const revenueSuffix = document.getElementById('revenue-currency-suffix');
+            if (revenueSuffix) {
+                revenueSuffix.textContent = `${currency}/month`;
+            }
+
+            // Update core service revenue suffix (it's a direct span, not ID-based)
+            const coreRevenueInput = document.getElementById('core-service-revenue');
+            if (coreRevenueInput) {
+                const coreRevenueSpan = coreRevenueInput.parentElement.querySelector('.input-group-text');
+                if (coreRevenueSpan) {
+                    coreRevenueSpan.textContent = `${currency}/month`;
+                }
+            }
+
+            // Update all other currency labels throughout the interface
+            const currencyLabels = document.querySelectorAll('.currency-label');
+            currencyLabels.forEach(label => {
+                label.textContent = currency;
+            });
+
+            // Update range slider labels with currency
+            const revenueLabel = document.querySelector('label[for="revenue-per-instance"]');
+            if (revenueLabel) {
+                revenueLabel.innerHTML = revenueLabel.innerHTML.replace(/(CHF|EUR)/, currency);
+            }
+
+            const coreRevenueLabel = document.querySelector('label[for="core-service-revenue"]');
+            if (coreRevenueLabel) {
+                coreRevenueLabel.innerHTML = coreRevenueLabel.innerHTML.replace(/(CHF|EUR)/, currency);
+            }
+
+            // Update investment amount field display if it has a value
+            const investmentInput = document.getElementById('investment-amount');
+            if (investmentInput && investmentInput.getAttribute('data-value')) {
+                const currentValue = investmentInput.getAttribute('data-value');
+                investmentInput.value = InputUtils.formatNumberWithCommas(currentValue, currency);
+            }
+        } catch (error) {
+            console.error('Error updating currency labels:', error);
+        }
+    }
+
     updateScenarioChurn(scenarioKey, churnRate) {
         try {
             if (this.calculator && this.calculator.scenarios[scenarioKey]) {