From 49d32b08541aac49ff7e2976449f36541e0bf346 Mon Sep 17 00:00:00 2001
From: Elias Jansson <elias.jansson@gmail.com>
Date: Tue, 21 Oct 2025 21:09:44 +0200
Subject: [PATCH] Veckomeny fixes to Date

---
 Aberwyn/Controllers/BudgetController.cs   |  6 ++
 Aberwyn/Controllers/FoodMenuController.cs | 16 +++++-
 Aberwyn/Views/Budget/Elkostnad.cshtml     | 70 +++++++++++++++++++++++
 3 files changed, 91 insertions(+), 1 deletion(-)
 create mode 100644 Aberwyn/Views/Budget/Elkostnad.cshtml

diff --git a/Aberwyn/Controllers/BudgetController.cs b/Aberwyn/Controllers/BudgetController.cs
index 254a7cb..017da7a 100644
--- a/Aberwyn/Controllers/BudgetController.cs
+++ b/Aberwyn/Controllers/BudgetController.cs
@@ -27,6 +27,12 @@ namespace Aberwyn.Controllers
             return View();
         }
 
+        [Route("budget/elkostnad")]
+        public IActionResult Elkostnad()
+        {
+            return View();
+        }
+
 
         // För fallback när ingen månad/år anges
         [Route("budget")]
diff --git a/Aberwyn/Controllers/FoodMenuController.cs b/Aberwyn/Controllers/FoodMenuController.cs
index 9572a3a..42a3f4e 100644
--- a/Aberwyn/Controllers/FoodMenuController.cs
+++ b/Aberwyn/Controllers/FoodMenuController.cs
@@ -358,7 +358,7 @@ namespace Aberwyn.Controllers
                 }
 
                 entry.Cook = cook;
-
+                entry.Date = FirstDateOfISOWeek(year, week).AddDays(day);
                 if (string.IsNullOrWhiteSpace(mealName))
                 {
                     switch (mealType.ToLower())
@@ -564,7 +564,21 @@ namespace Aberwyn.Controllers
 
 
 
+        private static DateTime FirstDateOfISOWeek(int year, int weekOfYear)
+        {
+            DateTime jan4 = new DateTime(year, 1, 4);
+            int daysOffset = DayOfWeek.Thursday - jan4.DayOfWeek;
 
+            DateTime firstThursday = jan4.AddDays(daysOffset);
+            var cal = System.Globalization.CultureInfo.CurrentCulture.Calendar;
+            int firstWeek = cal.GetWeekOfYear(firstThursday, System.Globalization.CalendarWeekRule.FirstFourDayWeek, DayOfWeek.Monday);
+
+            if (firstWeek <= 1)
+                weekOfYear -= 1;
+
+            DateTime result = firstThursday.AddDays(weekOfYear * 7);
+            return result.AddDays(-3); // tillbaka till måndag
+        }
 
 
 
diff --git a/Aberwyn/Views/Budget/Elkostnad.cshtml b/Aberwyn/Views/Budget/Elkostnad.cshtml
new file mode 100644
index 0000000..1657fc3
--- /dev/null
+++ b/Aberwyn/Views/Budget/Elkostnad.cshtml
@@ -0,0 +1,70 @@
+@{
+    ViewData["Title"] = "Elkostnad";
+}
+
+<h2>Räkna ut elkostnad</h2>
+
+<div class="form-section">
+    <div class="mb-2">
+        <label for="spotpris">Månadens spotpris (öre/kWh):</label>
+        <input type="number" id="spotpris" class="form-control" step="0.01" value="52.33" />
+    </div>
+
+    <div class="mb-2">
+        <label for="forbrukning">Förbrukning (kWh):</label>
+        <input type="number" id="forbrukning" class="form-control" value="350" />
+    </div>
+
+    <button type="button" class="btn btn-primary mt-2" onclick="berakna()">Beräkna</button>
+</div>
+
+<div id="resultat" class="alert alert-info mt-3" style="display:none;"></div>
+
+@section Scripts {
+    <script>
+        function berakna() {
+            // Inputs
+            let spotprisOre = parseFloat(document.getElementById("spotpris").value) || 0;
+            let spotprisKr = spotprisOre / 100; // omvandling öre → kr
+            let forbrukning = parseFloat(document.getElementById("forbrukning").value) || 0;
+
+            // Elhandel – fasta tillägg (kr/kWh)
+            const paslag = 0.029;
+            const rorliga = 0.0567;
+            const ursprung = 0.016;
+
+            // Elnät – fasta avgifter (kr/kWh)
+            const eloverforing = 0.29;
+            const energiskatt = 0.439;
+
+            // Fasta avgifter per månad (kr)
+            const elhandelFast = 39.20;
+            const elnatFast = 335.00;
+            const fastSumma = elhandelFast + elnatFast;
+
+            // Rörliga priser
+            let elhandelPerKwh = spotprisKr + paslag + rorliga + ursprung;
+            let elnatPerKwh = eloverforing + energiskatt;
+            let totaltPerKwh = elhandelPerKwh + elnatPerKwh;
+
+            // Kostnader
+            let rorligt = forbrukning * totaltPerKwh;
+            let totalExMoms = rorligt + fastSumma;
+            let moms = totalExMoms * 0.25;
+            let totalInklMoms = totalExMoms + moms;
+
+            // Resultat
+            let resultat = document.getElementById("resultat");
+            resultat.style.display = "block";
+            resultat.innerHTML = `
+                <h4>Resultat</h4>
+                <p>Rörligt (Elhandel + Elnät): ${rorligt.toFixed(2)} kr</p>
+                <p>Fasta avgifter: ${fastSumma.toFixed(2)} kr</p>
+                <p>Moms (25%): ${moms.toFixed(2)} kr</p>
+                <hr />
+                <strong>Total kostnad: ${totalInklMoms.toFixed(2)} kr</strong><br />
+                <small>Snittpris: ${(totalInklMoms / forbrukning).toFixed(2)} kr/kWh</small>
+            `;
+        }
+    </script>
+}