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

namespace PrecastConcretePlantDatabaseImplement.Implements
{
    public class ClientStorage : IClientStorage
    {
        public List<ClientViewModel> GetFullList()
        {
            using var context = new PrecastConcretePlantDatabase();
            return context.Clients
                    .Include(x => x.Orders)
                    .Select(x => x.GetViewModel)
                    .ToList();
        }

        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 (!string.IsNullOrEmpty(model.Email))
            {
                using var context = new PrecastConcretePlantDatabase();
                return context.Clients
                    .Include(x => x.Orders)
                    .Where(x => x.Email.Contains(model.Email))
                    .Select(x => x.GetViewModel)
                    .ToList();
            }
            return new();
        }

        public ClientViewModel? GetElement(ClientSearchModel model)
        {
            using var context = new PrecastConcretePlantDatabase();
            if (model.Id.HasValue)
				return context.Clients.FirstOrDefault(x => x.Id == model.Id)?.GetViewModel;
            if (model.Email != null && model.Password != null)
                return context.Clients.FirstOrDefault(x => x.Email.Equals(model.Email)
									  && x.Password.Equals(model.Password))
					?.GetViewModel;
			if (model.Email != null)
				return context.Clients.FirstOrDefault(x => x.Email.Equals(model.Email))?.GetViewModel;
			return null;
		}

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

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

        public ClientViewModel? Delete(ClientBindingModel model)
        {
            using var context = new PrecastConcretePlantDatabase();
            var element = context.Clients
                .Include(x => x.Orders)
                .FirstOrDefault(rec => rec.Id == model.Id);
            if (element != null)
            {
                context.Clients.Remove(element);
                context.SaveChanges();
                return element.GetViewModel;
            }
            return null;
        }
    }
}