first commit

Services/ClientStatService.cs

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+using Fitness_core_BE.Helpers;
+using Fitness_core_BE.Interfaces;
+using Fitness_core_BE.Interfaces.Services;
+
+namespace Fitness_core_BE.Services
+{
+    public class ClientStatService : IClientStatService
+    {
+        // Muscle Beast Gym (gymos_musslbeast) -- the only gym that gets the "Today's Payments"
+        // stat, per their explicit request. Not a general feature-flag system; if another gym
+        // wants this later, promote it to a real per-client setting instead of adding more IDs here.
+        private static readonly Guid MuscleBeastClientId = Guid.Parse("b2abf7b3-a9f0-11f1-945a-54e8d4bf1eca");
+
+        private readonly IClientStatRepository _clientStatRepository;
+        private readonly IOverdueLockRepository _overdueLockRepository;
+        private readonly UserRoleHelper _userRoleHelper;
+
+        public ClientStatService(
+            IClientStatRepository clientStatRepository,
+            IOverdueLockRepository overdueLockRepository,
+            UserRoleHelper userRoleHelper)
+        {
+            _clientStatRepository = clientStatRepository;
+            _overdueLockRepository = overdueLockRepository;
+            _userRoleHelper = userRoleHelper;
+        }
+
+        public async Task<object> GetTotalCustomerCount(object payload, HttpContext httpContext)
+        {
+            Guid userId = DataExtractor.GetUserIdFromContext(httpContext);
+            Guid clientId = await _userRoleHelper.GetClientId(userId);
+
+            var count = await _clientStatRepository.GetTotalCustomerCountAsync(clientId);
+            return new { totalCustomerCount = count };
+        }
+
+        public async Task<object> GetMonthlyCustomerCount(object payload, HttpContext httpContext)
+        {
+            Guid userId = DataExtractor.GetUserIdFromContext(httpContext);
+            Guid clientId = await _userRoleHelper.GetClientId(userId);
+
+            var count = await _clientStatRepository.GetMonthlyCustomerCountAsync(clientId);
+            return new { monthlyCustomerCount = count };
+        }
+
+        public async Task<object> GetTotalWorkoutPlanCount(object payload, HttpContext httpContext)
+        {
+            Guid userId = DataExtractor.GetUserIdFromContext(httpContext);
+            Guid clientId = await _userRoleHelper.GetClientId(userId);
+
+            var count = await _clientStatRepository.GetTotalWorkoutPlanCountAsync(clientId);
+            return new { totalWorkoutPlanCount = count };
+        }
+
+        public async Task<object> GetTotalMealPlanCount(object payload, HttpContext httpContext)
+        {
+            Guid userId = DataExtractor.GetUserIdFromContext(httpContext);
+            Guid clientId = await _userRoleHelper.GetClientId(userId);
+
+            var count = await _clientStatRepository.GetTotalMealPlanCountAsync(clientId);
+            return new { totalMealPlanCount = count };
+        }
+        public async Task<object> GetLastMonthCustomerCount(object payload, HttpContext httpContext)
+        {
+            Guid userId = DataExtractor.GetUserIdFromContext(httpContext);
+            Guid clientId = await _userRoleHelper.GetClientId(userId);
+
+            var count = await _clientStatRepository.GetLastMonthCustomerCountAsync(clientId);
+            return new { lastMonthCustomerCount = count };
+        }
+
+        public async Task<object> GetLastFiveAttendances(object payload, HttpContext httpContext)
+        {
+            Guid userId = DataExtractor.GetUserIdFromContext(httpContext);
+            Guid clientId = await _userRoleHelper.GetClientId(userId);
+
+            var records = await _clientStatRepository.GetLastFiveAttendancesAsync(clientId);
+            return records;
+        }
+
+        public async Task<object> GetLastFivePayments(object payload, HttpContext httpContext)
+        {
+            Guid userId = DataExtractor.GetUserIdFromContext(httpContext);
+            Guid clientId = await _userRoleHelper.GetClientId(userId);
+
+            var records = await _clientStatRepository.GetLastFivePaymentsAsync(clientId);
+            return records;
+        }
+
+        public async Task<object> GetLastMonthRevenue(object payload, HttpContext httpContext)
+        {
+            Guid userId = DataExtractor.GetUserIdFromContext(httpContext);
+            Guid clientId = await _userRoleHelper.GetClientId(userId);
+
+            var revenue = await _clientStatRepository.GetLastMonthRevenueAsync(clientId);
+            return new { lastMonthRevenue = revenue };
+        }
+
+        public async Task<object> GetMonthlyRevenueVariation(object payload, HttpContext httpContext, DateTime? from = null, DateTime? to = null)
+        {
+            Guid userId = DataExtractor.GetUserIdFromContext(httpContext);
+            Guid clientId = await _userRoleHelper.GetClientId(userId);
+
+            var stats = await _clientStatRepository.GetMonthlyRevenueVariationAsync(clientId, from, to);
+
+            var isOwner = (await _userRoleHelper.GetOwnedClientId(userId)).HasValue;
+            if (!isOwner)
+            {
+                // Revenue is owner-only, enforced here (not just hidden client-side) — staff
+                // still get real NewMemberCount points, just no Revenue figures.
+                foreach (var point in stats) point.Revenue = 0m;
+            }
+
+            return stats;
+        }
+
+        public async Task<object> GetTotalRevenue(object payload, HttpContext httpContext)
+        {
+            Guid userId = DataExtractor.GetUserIdFromContext(httpContext);
+            Guid clientId = await _userRoleHelper.GetClientId(userId);
+
+            var revenue = await _clientStatRepository.GetTotalRevenueAsync(clientId);
+            return new { totalRevenue = revenue };
+        }
+
+        public async Task<object> GetClientStatSummary(object payload, HttpContext httpContext, DateTime? from = null, DateTime? to = null)
+        {
+            Guid userId = DataExtractor.GetUserIdFromContext(httpContext);
+            Guid clientId = await _userRoleHelper.GetClientId(userId);
+
+            var summary = await _clientStatRepository.GetClientStatSummaryAsync(clientId, from, to);
+            summary.OverdueCount = (await _overdueLockRepository.GetOverdueCustomerIdsAsync(clientId, DateTime.UtcNow)).Count;
+            summary.ShowTodayPayments = clientId == MuscleBeastClientId;
+
+            var isOwner = (await _userRoleHelper.GetOwnedClientId(userId)).HasValue;
+            if (!isOwner)
+            {
+                // Revenue is owner-only, enforced here (not just hidden client-side) — a staff
+                // member calling this endpoint directly still gets zeros, not real figures.
+                summary.ThisMonthRevenue = 0m;
+                summary.LastMonthRevenue = 0m;
+                summary.RevenueGrowthPercentage = 0m;
+                summary.TotalRevenue = 0m;
+            }
+
+            return summary;
+        }
+    }
+}