using Contracts.BindingModels;
using Contracts.SearchModels;
using Contracts.StoragesContracts;
using Contracts.ViewModels;
using DatabaseImplement.Models;

namespace DatabaseImplement.Implements
{
	public class WorkshopStorage : IWorkshopStorage
	{
		public WorkshopViewModel? Delete(WorkshopBindingModel model)
		{
			using var context = new FactoryGoWorkDatabase();
			var newWorkshop = context.Workshops.FirstOrDefault(x => x.Id == model.Id);
			if (newWorkshop == null)
				return null;
			context.Workshops.Remove(newWorkshop);
			context.SaveChanges();
			return newWorkshop.GetViewModel;
		}

		public WorkshopViewModel? GetElement(WorkshopSearchModel model)
		{
			using var context = new FactoryGoWorkDatabase();
			return context.Workshops.FirstOrDefault(x => (!string.IsNullOrEmpty(model.Title) && x.Title.Contains(model.Title)) || (model.Id.HasValue && x.Id == model.Id))?.GetViewModel;
		}

		public List<WorkshopViewModel> GetFilteredList(WorkshopSearchModel model)
		{
			if (!model.Id.HasValue && string.IsNullOrEmpty(model.Title) && !model.UserId.HasValue)
			{
				return new();
			}
			using var context = new FactoryGoWorkDatabase();
			if (model.Id.HasValue)
			{
				return context.Workshops.Where(x => x.Id == model.Id).Select(x => x.GetViewModel).ToList();
			}
			else if (model.UserId.HasValue)
			{
				return context.Workshops.Where(x => x.UserId == model.Id).Select(x => x.GetViewModel).ToList();
			}
			else
			{
				return context.Workshops.Where(x => model.Title == x.Title).Select(x => x.GetViewModel).ToList();
			}
		}

		public List<WorkshopViewModel> GetFullList()
		{
			using var context = new FactoryGoWorkDatabase();
			return context.Workshops.Select(x => x.GetViewModel).ToList();
		}

		public WorkshopViewModel? Insert(WorkshopBindingModel model)
		{
			using var context = new FactoryGoWorkDatabase();
			var newWorkshop = Workshop.Create(context, model);
			if (newWorkshop == null)
				return null;
			context.Workshops.Add(newWorkshop);
			context.SaveChanges();
			return newWorkshop.GetViewModel;
		}

		public WorkshopViewModel? Update(WorkshopBindingModel model)
		{
			using var context = new FactoryGoWorkDatabase();
			var newWorkshop = context.Workshops.FirstOrDefault(x => x.Id == model.Id);
			if (newWorkshop == null)
				return null;
			newWorkshop.Update(model);
			context.SaveChanges();
			return newWorkshop.GetViewModel;
		}
	}
}