using Complex.Application;
using Complex.Application.Common;
using Complex.Common.Dto;
using Complex.Domain.Entities;
using Microsoft.EntityFrameworkCore;

namespace Complex.Application.Services.Dashboard
{
    public interface IDashboardService
    {
        ResultDto<DashboardSummaryDto> GetManagerSummary(Guid complexId, CommonRequestDto? commonRequest = null);
    }

    public class DashboardService : IDashboardService
    {
        private readonly IComplexDBContext _complexDBContext;

        public DashboardService(IComplexDBContext complexDBContext)
        {
            _complexDBContext = complexDBContext;
        }

        public ResultDto<DashboardSummaryDto> GetManagerSummary(Guid complexId, CommonRequestDto? commonRequest = null)
        {
            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 today = DateOnly.FromDateTime(DateTime.Now);
            var activeCostCycles = _complexDBContext.CostCycles
                .Count(c => c.ComplexId == complexId && c.EndDate >= today);

            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; }
    }
}