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

namespace BankDataBaseImplement.Implemets
{
    public class ClientStorage : IClientStorage
    {
        public ClientViewModel? Delete(ClientBindingModel model)
        {
            using var context = new BankDataBase();

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

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

                return element.GetViewModel;
            }

            return null;
        }

        public ClientViewModel? GetElement(ClientSearchModel model)
        {
            using var context = new BankDataBase();

            if (model.Id.HasValue)
                return context.Clients
                    .Include(x => x.ConferenceBookings)
                    .Include(x => x.Dinners)
                    .Include(x => x.Rooms)
                    .FirstOrDefault(x => x.Id == model.Id)?
                    .GetViewModel;

            if (!string.IsNullOrEmpty(model.ClientLogin) && !string.IsNullOrEmpty(model.ClientPassword))
                return context.Clients
                    .Include(x => x.ConferenceBookings)
                    .Include(x => x.Dinners)
                    .Include(x => x.Rooms)
                    .FirstOrDefault(x => x.ClientLogin.Equals(model.ClientLogin) && x.ClientPassword.Equals(model.ClientPassword))?
                    .GetViewModel;

            if (!string.IsNullOrEmpty(model.ClientLogin))
                return context.Clients
                    .Include(x => x.ConferenceBookings)
                    .Include(x => x.Dinners)
                    .Include(x => x.Rooms)
                    .FirstOrDefault(x => x.ClientLogin.Equals(model.ClientLogin))?
                    .GetViewModel;

            return null;
        }

        public List<ClientViewModel> GetFilteredList(ClientSearchModel model)
        {
            if (string.IsNullOrEmpty(model.ClientFIO))
            {
                return new();
            }

            using var context = new BankDataBase();

            return context.Clients
                .Include(x => x.ConferenceBookings)
                .Include(x => x.Dinners)
                .Include(x => x.Rooms)
                .Where(x => x.ClientLogin.Contains(model.ClientLogin) && x.ClientPassword == model.ClientPassword)
                .Select(x => x.GetViewModel)
                .ToList();
        }

        public List<ClientViewModel> GetFullList()
        {
            using var context = new BankDataBase();

            return context.Clients
                .Select(x => x.GetViewModel)
                .ToList();
        }

        public ClientViewModel? Insert(ClientBindingModel model)
        {
            var newHeadwaiter = Client.Create(model);

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

            using var context = new BankDataBase();

            context.Clients.Add(newHeadwaiter);
            context.SaveChanges();

            return newHeadwaiter.GetViewModel;
        }

        public ClientViewModel? Update(ClientBindingModel model)
        {
            using var context = new BankDataBase();

            var headwaiter = context.Clients
                .FirstOrDefault(x => x.Id == model.Id);

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

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

            return headwaiter.GetViewModel;
        }
    }
}