using Contracts.BindingModels;
using Contracts.SearchModels;
using Contracts.StorageContracts;
using Contracts.ViewModels;
using DatabaseImplement.Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace DatabaseImplement.Implements
{
	public class CityStorage : ICityStorage
	{
		public CityViewModel? Delete(CityBindingModel model)
		{
			using var context = new AccountsDatabase();
			var element = context.Cities.FirstOrDefault(rec => rec.Id == model.Id);
			if (element != null)
			{
				context.Cities.Remove(element);
				context.SaveChanges();
				return element.GetViewModel;
			}
			return null;
		}

		public CityViewModel? GetElement(CitySearchModel model)
		{
			if (!model.Id.HasValue)
			{
				return null;
			}
			using var context = new AccountsDatabase();
			return context.Cities
			.FirstOrDefault(x => model.Id.HasValue && x.Id == model.Id)
			?.GetViewModel;
		}

		public List<CityViewModel> GetFilteredList(CitySearchModel model)
		{
			if (!model.Id.HasValue)
			{
				return new();
			}
			using var context = new AccountsDatabase();
			return context.Cities
			.Where(x => x.Id == model.Id)
			.Select(x => x.GetViewModel)
			.ToList();
		}

		public List<CityViewModel> GetFullList()
		{
			using var context = new AccountsDatabase();
			return context.Cities
			.Select(x => x.GetViewModel)
			.ToList();
		}

		public CityViewModel? Insert(CityBindingModel model)
		{
			var newcity = Cities.Create(model);
			if (newcity == null)
			{
				return null;
			}
			using var context = new AccountsDatabase();
			context.Cities.Add(newcity);
			context.SaveChanges();
			return newcity.GetViewModel;
		}

		public CityViewModel? Update(CityBindingModel model)
		{
			using var context = new AccountsDatabase();
			var component = context.Cities.FirstOrDefault(x => x.Id == model.Id);
			if (component == null)
			{
				return null;
			}
			component.Update(model);
			context.SaveChanges();
			return component.GetViewModel;
		}
	}
}