using HospitalContracts.BindingModels;
using HospitalContracts.SearchModels;
using HospitalContracts.StoragesContracts;
using HospitalContracts.ViewModels;
using HospitalDataBaseImplements.Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace HospitalDataBaseImplements.Implements
{
    public class RecipesStorage : IRecipesStorage
    {
        public RecipesViewModel? Delete(RecipesBindingModel model)
        {
            using var context = new HospitalDatabase();
            var element = context.Recipes.FirstOrDefault(rec => rec.Id == model.Id);
            if (element != null)
            {
                context.Recipes.Remove(element);
                context.SaveChanges();
                return element.GetViewModel;
            }
            return null;
        }

        public RecipesViewModel? GetElement(RecipesSearchModel model)
        {
            if (!model.Id.HasValue)
            {
                return null;
            }
            using var context = new HospitalDatabase();
            return context.Recipes.FirstOrDefault(x => (model.Id.HasValue && x.Id == model.Id))?.GetViewModel;
        }

        public List<RecipesViewModel> GetFilteredList(RecipesSearchModel model)
        {
            if (!model.Id.HasValue)
            {
                return new();
            }
            using var context = new HospitalDatabase();
            return context.Recipes.Where(x => x.Id == model.Id).Select(x => x.GetViewModel).ToList();
        }

        public List<RecipesViewModel> GetFullList()
        {
            using var context = new HospitalDatabase();
            return context.Recipes.Select(x => x.GetViewModel).ToList();
        }

        public RecipesViewModel? Insert(RecipesBindingModel model)
        {
            using var context = new HospitalDatabase();
            var newRecipe = Recipes.Create(context, model);
            if (newRecipe == null)
            {
                return null;
            }
            context.Recipes.Add(newRecipe);
            context.SaveChanges();
            return newRecipe.GetViewModel;
        }

        public RecipesViewModel? Update(RecipesBindingModel model)
        {
            using var context = new HospitalDatabase();
            var recipe = context.Recipes.FirstOrDefault(x => x.Id == model.Id);
            if (recipe == null)
            {
                return null;
            }
            recipe.Update(model);
            context.SaveChanges();
            return recipe.GetViewModel;
        }
    }
}