fix: enhance date range calculations and optimize date range change handling

app/api/dashboard/metrics/route.ts

@@ -91,13 +91,24 @@ export async function GET(request: NextRequest) {
 
   const metrics = sessionMetrics(chatSessions, companyConfigForMetrics);
 
-  // Calculate date range from sessions
+  // Calculate date range from ALL sessions (not filtered) to get the full available range
   let dateRange: { minDate: string; maxDate: string } | null = null;
-  if (prismaSessions.length > 0) {
-    const dates = prismaSessions.map(s => new Date(s.startTime)).sort((a, b) => a.getTime() - b.getTime());
+  const allSessions = await prisma.session.findMany({
+    where: {
+      companyId: user.companyId,
+    },
+    select: {
+      startTime: true,
+    },
+    orderBy: {
+      startTime: 'asc',
+    },
+  });
+
+  if (allSessions.length > 0) {
     dateRange = {
-      minDate: dates[0].toISOString().split('T')[0], // First session date
-      maxDate: dates[dates.length - 1].toISOString().split('T')[0] // Last session date
+      minDate: allSessions[0].startTime.toISOString().split('T')[0], // First session date
+      maxDate: allSessions[allSessions.length - 1].startTime.toISOString().split('T')[0] // Last session date
     };
   }
 

app/dashboard/overview/page.tsx

@@ -84,12 +84,15 @@ function DashboardContent() {
     }
   };
 
-  // Handle date range changes
+  // Handle date range changes with proper memoization
   const handleDateRangeChange = useCallback((startDate: string, endDate: string) => {
+    // Only update if dates actually changed to prevent unnecessary API calls
+    if (startDate !== selectedStartDate || endDate !== selectedEndDate) {
       setSelectedStartDate(startDate);
       setSelectedEndDate(endDate);
       fetchMetrics(startDate, endDate);
-  }, []);
+    }
+  }, [selectedStartDate, selectedEndDate]);
 
   useEffect(() => {
     // Redirect if not authenticated
@@ -329,8 +332,8 @@ function DashboardContent() {
         </CardHeader>
       </Card>
 
-      {/* Date Range Picker - Temporarily disabled to debug infinite loop */}
-      {/* {dateRange && (
+      {/* Date Range Picker */}
+      {dateRange && (
         <DateRangePicker
           minDate={dateRange.minDate}
           maxDate={dateRange.maxDate}
@@ -338,7 +341,7 @@ function DashboardContent() {
           initialStartDate={selectedStartDate}
           initialEndDate={selectedEndDate}
         />
-      )} */}
+      )}
 
       {/* Modern Metrics Grid */}
       <div className="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-4 gap-6">

components/DateRangePicker.tsx

@@ -1,6 +1,6 @@
 "use client";
 
-import { useState, useEffect } from "react";
+import { useState, useEffect, useRef, memo } from "react";
 
 interface DateRangePickerProps {
   minDate: string;
@@ -10,7 +10,7 @@ interface DateRangePickerProps {
   initialEndDate?: string;
 }
 
-export default function DateRangePicker({
+function DateRangePicker({
   minDate,
   maxDate,
   onDateRangeChange,
@@ -19,10 +19,26 @@ export default function DateRangePicker({
 }: DateRangePickerProps) {
   const [startDate, setStartDate] = useState(initialStartDate || minDate);
   const [endDate, setEndDate] = useState(initialEndDate || maxDate);
+  const isInitializedRef = useRef(false);
 
   useEffect(() => {
-    // Only notify parent component when dates change, not when the callback changes
+    // Update local state when props change (e.g., when date range is loaded from API)
+    if (initialStartDate && initialStartDate !== startDate) {
+      setStartDate(initialStartDate);
+    }
+    if (initialEndDate && initialEndDate !== endDate) {
+      setEndDate(initialEndDate);
+    }
+  }, [initialStartDate, initialEndDate]);
+
+  useEffect(() => {
+    // Only notify parent component after initial render and when dates actually change
+    // This prevents the infinite loop by not including onDateRangeChange in dependencies
+    if (isInitializedRef.current) {
       onDateRangeChange(startDate, endDate);
+    } else {
+      isInitializedRef.current = true;
+    }
   }, [startDate, endDate]);
 
   const handleStartDateChange = (newStartDate: string) => {
@@ -151,3 +167,6 @@ export default function DateRangePicker({
     </div>
   );
 }
+
+// Export memoized component as default
+export default memo(DateRangePicker);