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

namespace HospitalDataBaseImplements.Implements
{
    public class RecipesStorage : IRecipesStorage
    {
        public RecipesViewModel? Delete(RecipesBindingModel model)
        {
            using var context = new HospitalDatabase();
            var element = context.Recipes.Include(x => x.Procedures).ThenInclude(x => x.Procedure).Include(x => x.Symptoms)
                .Include(x => x.Client).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.
                Include(x => x.Client).
                Include(x => x.Procedures).
                ThenInclude(x => x.Procedure).
                Include(x => x.Symptoms).
                FirstOrDefault(x => (model.Id.HasValue && x.Id == model.Id))?
                .GetViewModel;
        }
        //НУЖЕН ТУТ ЕЩЕ ОДИН ТУ ЛИСТ???
        public List<RecipesViewModel> GetFilteredList(RecipesSearchModel model)
        {
            if (model is null)
            {
                return new();
            }
            using var context = new HospitalDatabase();

                return context.Recipes.
                Include(x => x.Procedures).
                ThenInclude(x => x.Procedure)
                    .Include(x => x.Symptoms)
                    .Include(x => x.Client)
                    .Where(x => x.ClientId == model.ClientId).ToList()
                    .Select(x => x.GetViewModel)
                    .ToList();
        }

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

        public RecipesViewModel? Insert(RecipesBindingModel model)
        {
            using var context = new HospitalDatabase();
            var newRecipe = Recipes.Create(model);
            if (newRecipe == null)
            {
                return null;
            }
            context.Recipes.Add(newRecipe);
            context.SaveChanges();
            return context.Recipes
                .Include(x => x.Procedures)
                .ThenInclude(x => x.Procedure)
                .Include(x => x.Symptoms)
                .Include(x => x.Client)
                .FirstOrDefault(x => x.Id == newRecipe.Id)
                ?.GetViewModel;
        }

        public RecipesViewModel? Update(RecipesBindingModel model)
        {
            using var context = new HospitalDatabase();
            using var transaction = context.Database.BeginTransaction();
            try
            {
                var recipe = context.Recipes.FirstOrDefault(x => x.Id == model.Id);
            if (recipe == null)
            {
                return null;
            }
            recipe.Update(model);
            context.SaveChanges();
                if (model.RecipeProcedures != null)
                    recipe.UpdateProcedures(context, model);
                transaction.Commit();
                return recipe.GetViewModel;
            }
            catch
            {
                transaction.Rollback();
                throw;
            }
        }
    }
}