using Microsoft.EntityFrameworkCore;
using SushiBarContracts.BindingModels;
using SushiBarContracts.SearchModels;
using SushiBarContracts.StoragesContracts;
using SushiBarContracts.ViewModels;
using SushiBarDatabaseImplement.Models;

namespace SushiBarDatabaseImplement.Implements
{
    public class ClientStorage : IClientStorage
    {
        public List<ClientViewModel> GetFullList()
        {
            using var context = new SushiBarDatabase();
            return context.Clients
                .Select(c => c.GetViewModel)
                .ToList();
        }
        public List<ClientViewModel> GetFilteredList(ClientSearchModel model)
        {
            using var context = new SushiBarDatabase();
            return context.Clients
                .Where(c =>
               (!model.Id.HasValue || c.Id == model.Id) &&
               (string.IsNullOrEmpty(model.ClientFIO) || c.ClientFIO.Contains(model.ClientFIO)) &&
               (string.IsNullOrEmpty(model.Email) || c.Email.Contains(model.Email)) &&
               (string.IsNullOrEmpty(model.Password) || c.Password.Equals(model.Password)))
               .Select(c => c.GetViewModel)
                .ToList();
        }
        public ClientViewModel? GetElement(ClientSearchModel model)
        {
            using var context = new SushiBarDatabase();
            return context.Clients
                .FirstOrDefault(c =>
                (!model.Id.HasValue || c.Id == model.Id) &&
                (string.IsNullOrEmpty(model.ClientFIO) || c.ClientFIO.Contains(model.ClientFIO)) &&
                (string.IsNullOrEmpty(model.Email) || c.Email.Equals(model.Email)) &&
                (string.IsNullOrEmpty(model.Password) || c.Password.Equals(model.Password)))?
                .GetViewModel;
        }
        public ClientViewModel? Insert(ClientBindingModel model)
        {
            using var context = new SushiBarDatabase();
            var newClient = Client.Create(model);
            if (newClient == null)
            {
                return null;
            }
            context.Clients.Add(newClient);
            context.SaveChanges();
            return newClient.GetViewModel;
        }
        public ClientViewModel? Update(ClientBindingModel model)
        {
            using var context = new SushiBarDatabase();
            using var transaction = context.Database.BeginTransaction();
            try
            {
                var client = context.Clients
                    .FirstOrDefault(c => c.Id == model.Id);
                if (client == null)
                {
                    return null;
                }
                client.Update(model);
                context.SaveChanges();
                transaction.Commit();
                return client.GetViewModel;
            }
            catch
            {
                transaction.Rollback();
                throw;
            }
        }
        public ClientViewModel? Delete(ClientBindingModel model)
        {
            using var context = new SushiBarDatabase();
            var element = context.Clients
                .FirstOrDefault(c => c.Id == model.Id);
            if (element != null)
            {
                context.Clients.Remove(element);
                context.SaveChanges();
                return element.GetViewModel;
            }
            return null;
        }
    }
}