Restore accidentally removed files, a few additional import/calculation fixes

inventory-server/dashboard/aircall-server/src/routes/aircall.routes.js

@@ -0,0 +1,57 @@
+import express from 'express';
+import { AircallService } from '../services/aircall/AircallService.js';
+
+export const createAircallRoutes = (config, logger) => {
+  const router = express.Router();
+  const aircallService = new AircallService(config);
+
+  router.get('/metrics/:timeRange?', async (req, res) => {
+    try {
+      const { timeRange = 'today' } = req.params;
+      const allowedRanges = ['today', 'yesterday', 'last7days', 'last30days', 'last90days'];
+      
+      if (!allowedRanges.includes(timeRange)) {
+        return res.status(400).json({ 
+          error: 'Invalid time range',
+          allowedRanges 
+        });
+      }
+
+      const metrics = await aircallService.getMetrics(timeRange);
+      
+      res.json({
+        ...metrics,
+        _meta: {
+          timeRange,
+          generatedAt: new Date().toISOString(),
+          dataPoints: metrics.daily_data?.length || 0
+        }
+      });
+    } catch (error) {
+      logger.error('Error fetching Aircall metrics:', error);
+      res.status(500).json({ 
+        error: 'Failed to fetch Aircall metrics',
+        message: error.message 
+      });
+    }
+  });
+
+  // Health check endpoint
+  router.get('/health', (req, res) => {
+    const mongoConnected = !!aircallService.mongodb?.db;
+    const redisConnected = !!aircallService.redis?.isOpen;
+    
+    const health = {
+      status: mongoConnected && redisConnected ? 'ok' : 'degraded',
+      service: 'aircall',
+      timestamp: new Date().toISOString(),
+      connections: {
+        mongodb: mongoConnected,
+        redis: redisConnected
+      }
+    };
+    res.json(health);
+  });
+
+  return router;
+};