add

backend/src/main/java/com/flower/admin/AdminDashboardController.java

@@ -0,0 +1,48 @@
+package com.flower.admin;
+
+import com.flower.common.ApiResponse;
+import com.flower.order.OrderRepository;
+import com.flower.security.AdminOnly;
+import com.flower.user.UserRepository;
+import lombok.Data;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import java.math.BigDecimal;
+
+@RestController
+@RequestMapping("/api/admin/dashboard")
+@AdminOnly
+public class AdminDashboardController {
+    private final OrderRepository orderRepository;
+    private final UserRepository userRepository;
+
+    public AdminDashboardController(OrderRepository orderRepository, UserRepository userRepository) {
+        this.orderRepository = orderRepository;
+        this.userRepository = userRepository;
+    }
+
+    @GetMapping
+    public ApiResponse<DashboardStats> stats() {
+        long totalOrders = orderRepository.count();
+        long totalUsers = userRepository.count();
+        BigDecimal totalSales = orderRepository.findAll().stream()
+                .filter(order -> "PAID".equals(order.getStatus()) || "SHIPPED".equals(order.getStatus())
+                        || "COMPLETED".equals(order.getStatus()))
+                .map(order -> order.getTotalAmount() == null ? BigDecimal.ZERO : order.getTotalAmount())
+                .reduce(BigDecimal.ZERO, BigDecimal::add);
+        DashboardStats stats = new DashboardStats();
+        stats.setTotalOrders(totalOrders);
+        stats.setTotalUsers(totalUsers);
+        stats.setTotalSales(totalSales);
+        return ApiResponse.ok(stats);
+    }
+
+    @Data
+    public static class DashboardStats {
+        private long totalOrders;
+        private long totalUsers;
+        private BigDecimal totalSales;
+    }
+}