using ConfectioneryContracts.BindingModels;
using ConfectioneryContracts.SearchModels;
using ConfectioneryContracts.StoragesContracts;
using ConfectioneryContracts.ViewModels;
using ConfectioneryDatabaseImplement.Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConfectioneryDatabaseImplement
{
	internal class ImplementerStorage : IImplementerStorage
	{
		public List<ImplementerViewModel> GetFullList()
		{
			using var context = new ConfectioneryDatabase();
			return context.Implementers.Select(x => x.GetViewModel).ToList();
		}

		public List<ImplementerViewModel> GetFilteredList(ImplementerSearchModel model)
		{
			if (string.IsNullOrEmpty(model.ImplementerFIO))
			{
				return new();
			}
			using var context = new ConfectioneryDatabase();
			return context.Implementers.Where(x => x.ImplementerFIO.Contains(model.ImplementerFIO)).Select(x => x.GetViewModel).ToList();
		}

		public ImplementerViewModel? GetElement(ImplementerSearchModel model)
		{
			if (string.IsNullOrEmpty(model.ImplementerFIO) && !model.Id.HasValue)
			{
				return null;
			}
			using var context = new ConfectioneryDatabase();
			return context.Implementers.FirstOrDefault(x =>
				(!string.IsNullOrEmpty(model.ImplementerFIO) && x.ImplementerFIO == model.ImplementerFIO && (!string.IsNullOrEmpty(model.Password) ? x.Password == model.Password : true)) ||
				(model.Id.HasValue && x.Id == model.Id))
				?.GetViewModel;
		}

		public ImplementerViewModel? Insert(ImplementerBindingModel model)
		{
			var newImplementer = Implementer.Create(model);
			if (newImplementer == null)
			{
				return null;
			}
			using var context = new ConfectioneryDatabase();
			context.Implementers.Add(newImplementer);
			context.SaveChanges();
			return newImplementer.GetViewModel;
		}

		public ImplementerViewModel? Update(ImplementerBindingModel model)
		{
			using var context = new ConfectioneryDatabase();
			var implementer = context.Implementers.FirstOrDefault(x => x.Id == model.Id);
			if (implementer == null)
			{
				return null;
			}
			implementer.Update(model);
			context.SaveChanges();
			return implementer.GetViewModel;
		}

		public ImplementerViewModel? Delete(ImplementerBindingModel model)
		{
			using var context = new ConfectioneryDatabase();
			var implementer = context.Implementers.FirstOrDefault(rec => rec.Id == model.Id);
			if (implementer != null)
			{
				context.Implementers.Remove(implementer);
				context.SaveChanges();
				return implementer.GetViewModel;
			}
			return null;
		}
	}
}