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

namespace DatabaseImplement.Implements
{
	public class ProductStorage : IProductStorage
	{
		public ProductViewModel? Delete(ProductBindingModel model)
		{
			using var context = new FactoryGoWorkDatabase();
			var newProduct = context.Products.FirstOrDefault(x => x.Id == model.Id);
			if (newProduct == null)
				return null;
			context.Products.Remove(newProduct);
			context.SaveChanges();
			return newProduct.GetViewModel;
		}

		public ProductViewModel? GetElement(ProductSearchModel model)
		{
			using var context = new FactoryGoWorkDatabase();
			return context.Products.FirstOrDefault(x => (!string.IsNullOrEmpty(model.Name) && x.Name.Contains(model.Name)) || (model.Id.HasValue && x.Id == model.Id))?.GetViewModel;
		}

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

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

		public ProductViewModel? Insert(ProductBindingModel model)
		{
			using var context = new FactoryGoWorkDatabase();
			var newProduct = Product.Create(context, model);
			if (newProduct == null)
				return null;
			context.Products.Add(newProduct);
			context.SaveChanges();
			return newProduct.GetViewModel;
		}

		public ProductViewModel? Update(ProductBindingModel model)
		{
			using var context = new FactoryGoWorkDatabase();
			var newProduct = context.Products.FirstOrDefault(x => x.Id == model.Id);
			if (newProduct == null)
				return null;
			newProduct.Update(model);
			context.SaveChanges();
			return newProduct.GetViewModel;
		}
	}
}