using ComputersShopContracts.BindingModels;
using ComputersShopContracts.SearchModels;
using ComputersShopContracts.StoragesContracts;
using ComputersShopContracts.ViewModels;
using ComputersShopDataBaseImplement.Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ComputersShopDataBaseImplement.Implements
{
    public class ClientStorage : IClientStorage
    {
        public ClientViewModel? Delete(ClientBindingModel model)
        {
            using var context = new ComputersShopDataBase();
            var res = context.Clients.FirstOrDefault(x => x.Id == model.Id);
            if (res != null)
            {
                context.Clients.Remove(res);
                context.SaveChanges();
            }
            return res?.GetViewModel;
        }

        public ClientViewModel? GetElement(ClientSearchModel model)
        {
            if (string.IsNullOrEmpty(model.ClientFIO) &&
                string.IsNullOrEmpty(model.Email) &&
                string.IsNullOrEmpty(model.Password) &&
                !model.Id.HasValue)
            {
                return null;
            }
            using var context = new ComputersShopDataBase();
            var temp = context.Clients
            .FirstOrDefault(x => (string.IsNullOrEmpty(model.ClientFIO) || x.ClientFIO == model.ClientFIO) &&
                                 (string.IsNullOrEmpty(model.Email) || x.Email == model.Email) &&
                                 (string.IsNullOrEmpty(model.Password) || x.Password == model.Password) &&
                                 (!model.Id.HasValue || x.Id == model.Id))
            ?.GetViewModel;
            return temp;
        }

        public List<ClientViewModel> GetFilteredList(ClientSearchModel model)
        {
            if (model == null)
            {
                return new();
            }
            if (model.Id.HasValue)
            {
                var res = GetElement(model);
                return res != null ? new() { res } : new();
            }
            if (model.Email != null)
            {
                using var context = new ComputersShopDataBase();
                return context.Clients
                    .Where(x => x.Email.Contains(model.Email))
                    .Select(x => x.GetViewModel)
                    .ToList();
            }
            return new();
        }

        public List<ClientViewModel> GetFullList()
        {
            using var context = new ComputersShopDataBase();
            return context.Clients.Select(x => x.GetViewModel).ToList();
        }

        public ClientViewModel? Insert(ClientBindingModel model)
        {
            using var context = new ComputersShopDataBase();
            var res = Client.Create(model);
            if (res != null)
            {
                context.Clients.Add(res);
                context.SaveChanges();
            }
            return res?.GetViewModel;
        }

        public ClientViewModel? Update(ClientBindingModel model)
        {
            using var context = new ComputersShopDataBase();
            var res = context.Clients.FirstOrDefault(x => x.Id == model.Id);
            res?.Update(model);
            context.SaveChanges();
            return res?.GetViewModel;
        }
    }
}