Fix analytics chart

src/main/java/org/example/petshopdesktop/controllers/AnalyticsController.java

@@ -17,7 +17,10 @@ import org.example.petshopdesktop.util.ActivityLogger;
 import java.math.BigDecimal;
 import java.math.RoundingMode;
 import java.text.NumberFormat;
+import java.time.LocalDate;
 import java.time.format.DateTimeFormatter;
+import java.time.format.DateTimeParseException;
+import javafx.util.StringConverter;
 import java.util.*;
 import java.util.stream.Collectors;
 
@@ -42,7 +45,10 @@ public class AnalyticsController {
     private Label lblTotalItems;
 
     @FXML
-    private LineChart<String, Number> chartSalesOverTime;
+    private LineChart<Number, Number> chartSalesOverTime;
+
+    @FXML
+    private NumberAxis axisSalesDate;
 
     @FXML
     private BarChart<Number, String> chartTopRevenue;
@@ -58,6 +64,8 @@ public class AnalyticsController {
 
     private final NumberFormat currency = NumberFormat.getCurrencyInstance(Locale.CANADA);
     private final NumberFormat wholeNumber = NumberFormat.getIntegerInstance();
+    private final DateTimeFormatter chartDateFormatter = DateTimeFormatter.ofPattern("MMM d", Locale.CANADA);
+    private final List<String> salesDateLabels = new ArrayList<>();
 
     @FXML
     public void initialize() {
@@ -75,7 +83,30 @@ public class AnalyticsController {
     }
 
     private void configureCharts() {
-        chartSalesOverTime.setAnimated(true);
+        chartSalesOverTime.setAnimated(false);
+        axisSalesDate.setAnimated(false);
+        axisSalesDate.setAutoRanging(false);
+        axisSalesDate.setForceZeroInRange(false);
+        axisSalesDate.setMinorTickVisible(false);
+        axisSalesDate.setTickUnit(1);
+        axisSalesDate.setTickLabelRotation(-45);
+        axisSalesDate.setTickLabelFormatter(new StringConverter<>() {
+            @Override
+            public String toString(Number value) {
+                int index = value.intValue();
+                if (index < 0 || index >= salesDateLabels.size()) {
+                    return "";
+                }
+                int labelStep = Math.max(1, (salesDateLabels.size() + 14) / 15);
+                boolean showLabel = index == 0 || index == salesDateLabels.size() - 1 || index % labelStep == 0;
+                return showLabel ? salesDateLabels.get(index) : "";
+            }
+
+            @Override
+            public Number fromString(String string) {
+                return 0;
+            }
+        });
         chartTopRevenue.setAnimated(true);
         chartTopQuantity.setAnimated(true);
         chartPaymentMethods.setAnimated(true);
@@ -142,19 +173,36 @@ public class AnalyticsController {
 
     private void loadSalesOverTime(DashboardResponse dashboard) throws Exception {
         List<DailySales> dailySales = dashboard.getDailySales() != null ? dashboard.getDailySales() : new ArrayList<>();
-        XYChart.Series<String, Number> series = new XYChart.Series<>();
+        XYChart.Series<Number, Number> series = new XYChart.Series<>();
         series.setName("Daily Revenue");
 
-        for (DailySales dailySale : dailySales) {
-            String dateStr = dailySale.getDate();
+        salesDateLabels.clear();
+        for (int i = 0; i < dailySales.size(); i++) {
+            DailySales dailySale = dailySales.get(i);
+            salesDateLabels.add(formatChartDate(dailySale.getDate()));
             BigDecimal revenue = dailySale.getRevenue() != null ? dailySale.getRevenue() : BigDecimal.ZERO;
-            series.getData().add(new XYChart.Data<>(dateStr, revenue));
+            series.getData().add(new XYChart.Data<>(i, revenue));
         }
 
+        int upperBound = Math.max(0, salesDateLabels.size() - 1);
+        axisSalesDate.setLowerBound(0);
+        axisSalesDate.setUpperBound(upperBound);
         chartSalesOverTime.getData().clear();
         chartSalesOverTime.getData().add(series);
     }
 
+    private String formatChartDate(String date) {
+        if (date == null || date.isBlank()) {
+            return "";
+        }
+
+        try {
+            return LocalDate.parse(date).format(chartDateFormatter);
+        } catch (DateTimeParseException ignored) {
+            return date;
+        }
+    }
+
     private void loadTopProductsByRevenue(DashboardResponse dashboard) throws Exception {
         List<TopProduct> topProducts = dashboard.getTopProducts() != null ? dashboard.getTopProducts() : new ArrayList<>();
         XYChart.Series<Number, String> series = new XYChart.Series<>();

src/main/resources/org/example/petshopdesktop/modelviews/analytics-view.fxml

@@ -2,7 +2,6 @@
 
 <?import javafx.geometry.Insets?>
 <?import javafx.scene.chart.BarChart?>
-<?import javafx.scene.chart.CategoryAxis?>
 <?import javafx.scene.chart.LineChart?>
 <?import javafx.scene.chart.NumberAxis?>
 <?import javafx.scene.chart.PieChart?>
@@ -125,7 +124,7 @@
                     </Label>
                     <LineChart fx:id="chartSalesOverTime" animated="true" legendSide="BOTTOM" prefHeight="380.0">
                         <xAxis>
-                            <CategoryAxis label="Date" side="BOTTOM" />
+                            <NumberAxis fx:id="axisSalesDate" label="Date" side="BOTTOM" />
                         </xAxis>
                         <yAxis>
                             <NumberAxis label="Revenue" side="LEFT" />