cahched weekly report

csharp/App/Backend/Controller.cs

@@ -922,12 +922,13 @@ public class Controller : ControllerBase
     // ── Weekly Performance Report ──────────────────────────────────────
 
     /// <summary>
-    /// Generates a weekly performance report from an Excel file in tmp_report/{installationId}.xlsx
-    /// Returns JSON with daily data, weekly totals, ratios, and AI insight.
+    /// Returns a weekly performance report. Serves from cache if available;
+    /// generates fresh on first request or when forceRegenerate is true.
     /// </summary>
     [HttpGet(nameof(GetWeeklyReport))]
     public async Task<ActionResult<WeeklyReportResponse>> GetWeeklyReport(
-        Int64 installationId, Token authToken, String? language = null, String? weekStart = null)
+        Int64 installationId, Token authToken, String? language = null,
+        String? weekStart = null, Boolean forceRegenerate = false)
     {
         var user = Db.GetSession(authToken)?.User;
         if (user == null)
@@ -949,6 +950,39 @@ public class Controller : ControllerBase
         try
         {
             var lang = language ?? user.Language ?? "en";
+
+            // Compute target week dates for cache lookup
+            DateOnly periodStart, periodEnd;
+            if (weekStartDate.HasValue)
+            {
+                periodStart = weekStartDate.Value;
+                periodEnd   = weekStartDate.Value.AddDays(6);
+            }
+            else
+            {
+                (periodStart, periodEnd) = WeeklyReportService.LastCalendarWeek();
+            }
+
+            var periodStartStr = periodStart.ToString("yyyy-MM-dd");
+            var periodEndStr   = periodEnd.ToString("yyyy-MM-dd");
+
+            // Cache-first: check if a cached report exists for this week
+            if (!forceRegenerate)
+            {
+                var cached = Db.GetWeeklyReportForWeek(installationId, periodStartStr, periodEndStr);
+                if (cached != null)
+                {
+                    var cachedResponse = await ReportAggregationService.ToWeeklyReportResponseAsync(cached, lang);
+                    if (cachedResponse != null)
+                    {
+                        Console.WriteLine($"[GetWeeklyReport] Serving cached report for installation {installationId}, period {periodStartStr}–{periodEndStr}, language={lang}");
+                        return Ok(cachedResponse);
+                    }
+                }
+            }
+
+            // Cache miss or forceRegenerate: generate fresh
+            Console.WriteLine($"[GetWeeklyReport] Generating fresh report for installation {installationId}, period {periodStartStr}–{periodEndStr}");
             var report = await WeeklyReportService.GenerateReportAsync(
                 installationId, installation.InstallationName, lang, weekStartDate);
 

csharp/App/Backend/DataTypes/ReportSummary.cs

@@ -43,6 +43,12 @@ public class WeeklyReportSummary
     // AI insight for this week
     public String AiInsight               { get; set; } = "";
 
+    /// <summary>
+    /// Full serialized WeeklyReportResponse (with AiInsight cleared).
+    /// Used for cache-first serving — avoids regenerating numeric data + Mistral call.
+    /// </summary>
+    public String ResponseJson            { get; set; } = "";
+
     public String CreatedAt               { get; set; } = "";
 }
 

csharp/App/Backend/Database/Read.cs

@@ -77,6 +77,18 @@ public static partial class Db
             .ToList();
     }
 
+    /// <summary>
+    /// Finds a cached weekly report whose period overlaps with the given date range.
+    /// Uses overlap logic (not exact match) because PeriodStart may be offset
+    /// if the first day of the week has no data.
+    /// </summary>
+    public static WeeklyReportSummary? GetWeeklyReportForWeek(Int64 installationId, String periodStart, String periodEnd)
+        => WeeklyReports
+            .Where(r => r.InstallationId == installationId)
+            .ToList()
+            .FirstOrDefault(r => String.Compare(r.PeriodStart, periodEnd,   StringComparison.Ordinal) <= 0
+                              && String.Compare(r.PeriodEnd,   periodStart, StringComparison.Ordinal) >= 0);
+
     public static List<MonthlyReportSummary> GetMonthlyReports(Int64 installationId)
         => MonthlyReports
             .Where(r => r.InstallationId == installationId)

csharp/App/Backend/Services/ReportAggregationService.cs

@@ -185,6 +185,29 @@ public static class ReportAggregationService
             foreach (var old in overlapping)
                 Db.WeeklyReports.Delete(r => r.Id == old.Id);
 
+            // Serialize full response (minus AI insight) for cache-first serving
+            var reportForCache = new WeeklyReportResponse
+            {
+                InstallationName         = report.InstallationName,
+                PeriodStart              = report.PeriodStart,
+                PeriodEnd                = report.PeriodEnd,
+                CurrentWeek              = report.CurrentWeek,
+                PreviousWeek             = report.PreviousWeek,
+                TotalEnergySaved         = report.TotalEnergySaved,
+                TotalSavingsCHF          = report.TotalSavingsCHF,
+                DaysEquivalent           = report.DaysEquivalent,
+                SelfSufficiencyPercent   = report.SelfSufficiencyPercent,
+                SelfConsumptionPercent   = report.SelfConsumptionPercent,
+                BatteryEfficiencyPercent = report.BatteryEfficiencyPercent,
+                GridDependencyPercent    = report.GridDependencyPercent,
+                PvChangePercent          = report.PvChangePercent,
+                ConsumptionChangePercent = report.ConsumptionChangePercent,
+                GridImportChangePercent  = report.GridImportChangePercent,
+                DailyData                = report.DailyData,
+                Behavior                 = report.Behavior,
+                AiInsight                = "",  // Language-dependent; stored in AiInsightCache
+            };
+
             var summary = new WeeklyReportSummary
             {
                 InstallationId          = installationId,
@@ -207,6 +230,7 @@ public static class ReportAggregationService
                 WeekdayAvgDailyLoad     = report.Behavior?.WeekdayAvgDailyLoad ?? 0,
                 WeekendAvgDailyLoad     = report.Behavior?.WeekendAvgDailyLoad ?? 0,
                 AiInsight               = report.AiInsight,
+                ResponseJson            = JsonConvert.SerializeObject(reportForCache),
                 CreatedAt               = DateTime.UtcNow.ToString("o"),
             };
 
@@ -574,6 +598,25 @@ public static class ReportAggregationService
             () => GenerateWeeklySummaryAiInsightAsync(report, installationName, language));
     }
 
+    /// <summary>
+    /// Reconstructs a full WeeklyReportResponse from a cached WeeklyReportSummary.
+    /// Returns null if ResponseJson is empty (old records without cache data).
+    /// AI insight is fetched/generated per-language via AiInsightCache.
+    /// </summary>
+    public static async Task<WeeklyReportResponse?> ToWeeklyReportResponseAsync(
+        WeeklyReportSummary summary, String language)
+    {
+        if (String.IsNullOrEmpty(summary.ResponseJson))
+            return null;
+
+        var response = JsonConvert.DeserializeObject<WeeklyReportResponse>(summary.ResponseJson);
+        if (response == null)
+            return null;
+
+        response.AiInsight = await GetOrGenerateWeeklyInsightAsync(summary, language);
+        return response;
+    }
+
     /// <summary>Cached-or-generated AI insight for a stored MonthlyReportSummary.</summary>
     public static Task<String> GetOrGenerateMonthlyInsightAsync(
         MonthlyReportSummary report, String language)

typescript/frontend-marios2/src/content/dashboards/SodiohomeInstallations/WeeklyReport.tsx

@@ -20,6 +20,7 @@ import {
 } from '@mui/material';
 import SendIcon from '@mui/icons-material/Send';
 import DownloadIcon from '@mui/icons-material/Download';
+import RefreshIcon from '@mui/icons-material/Refresh';
 import ExpandMoreIcon from '@mui/icons-material/ExpandMore';
 import axiosConfig from 'src/Resources/axiosConfig';
 
@@ -514,12 +515,12 @@ function WeeklySection({ installationId, latestMonthlyPeriodEnd }: { installatio
     fetchReport();
   }, [installationId, intl.locale]);
 
-  const fetchReport = async () => {
+  const fetchReport = async (forceRegenerate = false) => {
     setLoading(true);
     setError(null);
     try {
       const res = await axiosConfig.get('/GetWeeklyReport', {
-        params: { installationId, language: intl.locale }
+        params: { installationId, language: intl.locale, forceRegenerate }
       });
       setReport(res.data);
     } catch (err: any) {
@@ -614,6 +615,8 @@ function WeeklySection({ installationId, latestMonthlyPeriodEnd }: { installatio
           borderRadius: 2
         }}
       >
+        <Box sx={{ display: 'flex', justifyContent: 'space-between', alignItems: 'flex-start' }}>
+          <Box>
             <Typography variant="h5" fontWeight="bold">
               <FormattedMessage id="reportTitle" defaultMessage="Weekly Performance Report" />
             </Typography>
@@ -623,6 +626,17 @@ function WeeklySection({ installationId, latestMonthlyPeriodEnd }: { installatio
             <Typography variant="body2" sx={{ opacity: 0.7 }}>
               {report.periodStart} — {report.periodEnd}
             </Typography>
+          </Box>
+          <Button
+            variant="outlined"
+            size="small"
+            startIcon={<RefreshIcon />}
+            onClick={() => fetchReport(true)}
+            sx={{ color: '#fff', borderColor: 'rgba(255,255,255,0.5)', '&:hover': { borderColor: '#fff' } }}
+          >
+            <FormattedMessage id="regenerateReport" defaultMessage="Regenerate" />
+          </Button>
+        </Box>
       </Paper>
 
       {/* Weekly Insights */}