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;
        }
    }
}