feat: add Dashboard service with manager summary statistics

Complex.Application/Services/DashboardService.cs

@@ -0,0 +1,68 @@
+using Complex.Application;
+using Complex.Common.Dto;
+using Complex.Domain.Entities;
+using Microsoft.EntityFrameworkCore;
+
+namespace Complex.Application.Services.Dashboard
+{
+    public interface IDashboardService
+    {
+        ResultDto<DashboardSummaryDto> GetManagerSummary(Guid complexId);
+    }
+
+    public class DashboardService : IDashboardService
+    {
+        private readonly IComplexDBContext _complexDBContext;
+
+        public DashboardService(IComplexDBContext complexDBContext)
+        {
+            _complexDBContext = complexDBContext;
+        }
+
+        public ResultDto<DashboardSummaryDto> GetManagerSummary(Guid complexId)
+        {
+            var units = _complexDBContext.Units.Where(u => u.ComplexId == complexId);
+
+            var totalUnits = units.Count();
+            var ownerUnits = units.Count(u => u.OwnerId != null);
+            var tenantUnits = units.Count(u => u.TenantId != null);
+
+            var activeCostCycles = _complexDBContext.CostCycles
+                .Count(c => c.ComplexId == complexId && c.EndDate >= DateOnly.FromDateTime(DateTime.Now));
+
+            var unitPersonMobileNumbers = units
+                .Where(u => u.OwnerId != null || u.TenantId != null)
+                .Select(u => u.OwnerId)
+                .Union(units.Where(u => u.TenantId != null).Select(u => u.TenantId))
+                .Distinct()
+                .ToList();
+
+            var totalPersons = _complexDBContext.Persons
+                .Count(p => unitPersonMobileNumbers.Contains(p.Id));
+
+            var result = new DashboardSummaryDto
+            {
+                TotalUnits = totalUnits,
+                OwnerUnits = ownerUnits,
+                TenantUnits = tenantUnits,
+                ActiveCostCycles = activeCostCycles,
+                TotalPersons = totalPersons
+            };
+
+            return new ResultDto<DashboardSummaryDto>
+            {
+                Data = result,
+                IsSuccess = true
+            };
+        }
+    }
+
+    public class DashboardSummaryDto
+    {
+        public int TotalUnits { get; set; }
+        public int OwnerUnits { get; set; }
+        public int TenantUnits { get; set; }
+        public int ActiveCostCycles { get; set; }
+        public int TotalPersons { get; set; }
+    }
+}

Complex.EndPoint/Controllers/DashboardController.cs

@@ -0,0 +1,28 @@
+using Complex.Application.Services.Dashboard;
+using Complex.Common.Dto;
+using Complex.EndPoint.Utility;
+using Microsoft.AspNetCore.Authorization;
+using Microsoft.AspNetCore.Mvc;
+
+namespace Complex.EndPoint.Controllers
+{
+    [ApiController]
+    [ApiVersion("1")]
+    [Route("api/v{version:apiVersion}/[controller]/[action]")]
+    [Authorize]
+    public class DashboardController : Controller
+    {
+        private readonly IDashboardService _dashboardService;
+
+        public DashboardController(IDashboardService dashboardService)
+        {
+            _dashboardService = dashboardService;
+        }
+
+        [HttpGet]
+        public ResultDto<DashboardSummaryDto> ManagerSummary(Guid complexId)
+        {
+            return _dashboardService.GetManagerSummary(complexId);
+        }
+    }
+}