using HotelContracts.BindingModels;
using HotelContracts.SearchModels;
using HotelContracts.StoragesContracts;
using HotelContracts.ViewModels;
using HotelDataBaseImplement.Models;
using Microsoft.EntityFrameworkCore;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace HotelDataBaseImplement.Implements
{
	public class DinnerStorage : IDinnerStorage
	{
		public List<DinnerViewModel> GetFullList()
		{
			using var context = new HotelDataBase();

			return context.Dinners
			.Include(x => x.RoomDinners)
			.ThenInclude(x => x.Room)
			.Include(x => x.ConferenceBookingDinner)
			.ThenInclude(x => x.ConferenceBooking)
			.Include(x => x.Administrator)
			.Select(x => x.GetViewModel)
			.ToList();
		}

		public List<DinnerViewModel> GetFilteredList(DinnerSearchModel model)
		{
			if (string.IsNullOrEmpty(model.DinnerName) && !model.AdministratorId.HasValue)
			{
				return new();
			}

			using var context = new HotelDataBase();

			if (model.AdministratorId.HasValue)
			{
				return context.Dinners
				.Include(x => x.RoomDinners)
				.ThenInclude(x => x.Room)
				.Include(x => x.ConferenceBookingDinner)
				.ThenInclude(x => x.ConferenceBooking)
				.Include(x => x.Administrator)
					.Where(x => x.AdministratorId == model.AdministratorId)
					.Select(x => x.GetViewModel)
					.ToList();
			}

			return context.Dinners
				.Include(x => x.RoomDinners)
				.ThenInclude(x => x.Room)
				.Include(x => x.ConferenceBookingDinner)
				.ThenInclude(x => x.ConferenceBooking)
				.Include(x => x.Administrator)
				.Where(x => x.DinnerName.Contains(model.DinnerName))
				.Select(x => x.GetViewModel)
				.ToList();
		}

		public DinnerViewModel? GetElement(DinnerSearchModel model)
		{
			if (string.IsNullOrEmpty(model.DinnerName) && !model.Id.HasValue)
			{
				return null;
			}

			using var context = new HotelDataBase();

			return context.Dinners
				.Include(x => x.RoomDinners)
				.ThenInclude(x => x.Room)
				.Include(x => x.ConferenceBookingDinner)
				.ThenInclude(x => x.ConferenceBooking)
				.FirstOrDefault(x => (!string.IsNullOrEmpty(model.DinnerName) && x.DinnerName == model.DinnerName) || (model.Id.HasValue && x.Id == model.Id))?
				.GetViewModel;
		}

		public DinnerViewModel? Insert(DinnerBindingModel model)
		{
			using var context = new HotelDataBase();

			var newDinner = Dinner.Create(model);

			if (newDinner == null)
			{
				return null;
			}

			context.Dinners.Add(newDinner);
			context.SaveChanges();

			return newDinner.GetViewModel;
		}

		public DinnerViewModel? Update(DinnerBindingModel model)
		{
			using var context = new HotelDataBase();

			var dinner = context.Dinners.FirstOrDefault(x => x.Id == model.Id);

			if (dinner == null)
			{
				return null;
			}

			dinner.Update(model);
			context.SaveChanges();

			return dinner.GetViewModel;
		}

		public DinnerViewModel? Delete(DinnerBindingModel model)
		{
			using var context = new HotelDataBase();

			var element = context.Dinners.FirstOrDefault(rec => rec.Id == model.Id);

			if (element != null)
			{
				context.Dinners.Remove(element);
				context.SaveChanges();

				return element.GetViewModel;
			}

			return null;
		}
        public List<ReportRoomsConferencesViewModel> GetReportRoomsConferences(ReportRoomsConferencesSearchModel model)
        {
            using var context = new HotelDataBase();
			return context.Dinners.Where(dinner => dinner.AdministratorId == model.AdministratorId)
			  .Select(x => new ReportRoomsConferencesViewModel()
              {
                  DinnerName = x.DinnerName,
                  Rooms = context.Rooms
                  .Where(room => room.DateCreate <= model.DateTo &&
                    room.DateCreate >= model.DateFrom && room.Dinners.Any(m => m.DinnerId == x.Id) && room.AdministratorId == model.AdministratorId)
                  .Select(room => room.GetViewModel)
                  .ToList(),
                  Conferences = context.ConferenceBookings
                  .Include(conferencebooking => conferencebooking.Conference)
                  .Where(conferencebooking => conferencebooking.Conference != null && conferencebooking.Conference.StartDate <= model.DateTo &&
                    conferencebooking.Conference.StartDate >= model.DateFrom && conferencebooking.Dinners.Any(m => m.DinnerId == x.Id) && conferencebooking.AdministratorId == model.AdministratorId)
                  .Select(conferencebooking => conferencebooking.Conference.GetViewModel)
                  .ToList(),
              })
              .ToList();
        }

        public List<ReportMealPlansDinnersViewModel> GetReportDinnerMealPlansList(ListMealPlansSearchModel model)
        {
			if (model.dinnersIds == null)
			{
				return new();
			}
			using var context = new HotelDataBase();
			return context.Dinners
        .Where(dinner => model.dinnersIds.Contains(dinner.Id))
        .Select(dinner => new ReportMealPlansDinnersViewModel
        {
            DinnerName = dinner.DinnerName,
            MealPlans = context.MealPlans
                .Include(mealplan => mealplan.Rooms)
                .ThenInclude(room => room.Dinners)
                .Where(mealplan => mealplan.Rooms
                    .SelectMany(room => room.Dinners)
                    .Any(rd => rd.DinnerId == dinner.Id))
                .Select(mealplan => mealplan.GetViewModel)
                .ToList()
        })
        .ToList();
        }
    }
}