using SchoolContracts.BindingModel;
using SchoolContracts.SearchModel;
using SchoolContracts.StoragesContracts;
using SchoolContracts.ViewModels;
using SchoolDatabaseImplement.Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace SchoolDatabaseImplement.Implements
{
	public class ClientStorage : IClientStorage
	{
		public List<ClientViewModel> GetFullList()
		{
			using var context = new SchoolDatabase();
			return context.Clients
			.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 (model.ClientEmail != null)
			{
				using var context = new SchoolDatabase();
				return context.Clients
				.Where(rec => rec.ClientEmail.Contains(model.ClientEmail))
				.Select(x => x.GetViewModel)
				.ToList();
			}
			return new();
		}
		public ClientViewModel? GetElement(ClientSearchModel model)
		{
			if (model == null)
			{
				return null;
			}
			using var context = new SchoolDatabase();
			if (model.Id.HasValue)
				return context.Clients.FirstOrDefault(x => x.Id == model.Id)?.GetViewModel;
			if (model.ClientEmail != null && model.ClientPassword != null)
				return context.Clients
					.FirstOrDefault(x => x.ClientEmail == model.ClientEmail
									  && x.ClientPassword == model.ClientPassword)?.GetViewModel;
			if (model.ClientEmail != null)
				return context.Clients.FirstOrDefault(x => x.ClientEmail == model.ClientEmail)?.GetViewModel;
			return null;
		}
		public ClientViewModel? Insert(ClientBindingModel model)
		{
			using var context = new SchoolDatabase();
			if(model == null)
			{
				return null;
			}
			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 SchoolDatabase();
			var res = context.Clients.FirstOrDefault(x => x.Id == model.Id);
			res?.Update(model);
			context.SaveChanges();
			return res?.GetViewModel;
		}
		public ClientViewModel? Delete(ClientBindingModel model)
		{
			using var context = new SchoolDatabase();
			var res = context.Clients.FirstOrDefault(x => x.Id == model.Id);
			if (res != null)
			{
				context.Clients.Remove(res);
				context.SaveChanges();
			}
			return res?.GetViewModel;
		}
	}
}