Add subcription feature 2

frontend/src/api/services/subscription.ts

@@ -402,6 +402,26 @@ export class SubscriptionService {
     return apiClient.get(`/subscriptions/${tenantId}/invoices`);
   }
 
+  /**
+   * Get the current payment method for a subscription
+   */
+  async getCurrentPaymentMethod(
+    tenantId: string
+  ): Promise<{
+    brand: string;
+    last4: string;
+    exp_month?: number;
+    exp_year?: number;
+  } | null> {
+    try {
+      const response = await apiClient.get(`/subscriptions/${tenantId}/payment-method`);
+      return response;
+    } catch (error) {
+      console.error('Failed to get current payment method:', error);
+      return null;
+    }
+  }
+
   /**
    * Update the default payment method for a subscription
    */
@@ -416,10 +436,55 @@ export class SubscriptionService {
     last4: string;
     exp_month?: number;
     exp_year?: number;
+    requires_action?: boolean;
+    client_secret?: string;
+    payment_intent_status?: string;
   }> {
     return apiClient.post(`/subscriptions/${tenantId}/update-payment-method?payment_method_id=${paymentMethodId}`, {});
   }
 
+  /**
+   * Complete subscription creation after SetupIntent confirmation
+   *
+   * This method is called after the frontend successfully confirms a SetupIntent
+   * (with or without 3DS authentication). It verifies the SetupIntent and creates
+   * the subscription with the verified payment method.
+   *
+   * @param setupIntentId - The SetupIntent ID that was confirmed by Stripe
+   * @param subscriptionData - Data needed to complete subscription creation
+   * @returns Promise with subscription creation result
+   */
+  async completeSubscriptionAfterSetupIntent(
+    setupIntentId: string,
+    subscriptionData: {
+      customer_id: string;
+      plan_id: string;
+      payment_method_id: string;
+      trial_period_days?: number;
+      user_id: string;
+      billing_interval: string;
+    }
+  ): Promise<{
+    success: boolean;
+    message: string;
+    data: {
+      subscription_id: string;
+      customer_id: string;
+      status: string;
+      plan: string;
+      billing_cycle: string;
+      trial_period_days?: number;
+      current_period_end: string;
+      user_id: string;
+      setup_intent_id: string;
+    };
+  }> {
+    return apiClient.post('/subscriptions/complete-after-setup-intent', {
+      setup_intent_id: setupIntentId,
+      ...subscriptionData
+    });
+  }
+
   // ============================================================================
   // NEW METHODS - Usage Forecasting & Predictive Analytics
   // ============================================================================