using Microsoft.EntityFrameworkCore;
using Microsoft.IdentityModel.Tokens;
using PolyclinicContracts.BindingModels;
using PolyclinicContracts.SearchModels;
using PolyclinicContracts.StoragesContracts;
using PolyclinicContracts.ViewModels;
using PolyclinicDatabaseImplement.Models;
using SecuritySystemDatabaseImplement;

namespace PolyclinicDatabaseImplement.Implements
{
    public class DiagnoseStorage : IDiagnoseStorage
    {
        public DiagnoseViewModel? Delete(DiagnoseBindingModel model)
        {
            using var context = new PolyclinicDatabase();
            var element = context.Diagnoses.FirstOrDefault(rec => rec.Id == model.Id);
            if (element != null)
            {
                context.Diagnoses.Remove(element);
                context.SaveChanges();
                return element.GetViewModel;
            }
            return null;
        }

        public DiagnoseViewModel? GetElement(DiagnoseSearchModel model)
        {
            return GetFilteredList(model).FirstOrDefault();
        }

        public List<DiagnoseViewModel> GetFilteredList(DiagnoseSearchModel model)
        {
            var elements = GetFullList();
            if (model.Id != null)
            {
                elements = elements.Where(x => x.Id == model.Id.Value).ToList();
            }
            if (!model.Name.IsNullOrEmpty())
            {
                elements = elements.Where(x => x.Name == model.Name).ToList();
            }
            if (model.UserId != null)
            {
                elements = elements.Where(x => x.UserId == model.UserId.Value).ToList();
            }
            if (model.From != null)
            {
                elements = elements.Where(x => x.DateStartDiagnose >= model.From.Value).ToList();
            }
            if (model.To != null)
            {
                elements = elements.Where(x => x.DateStartDiagnose <= model.To.Value).ToList();

                var elemWithDateStop = elements
                    .Where(x => x.DateStopDiagnose != null)
                    .Where(x => x.DateStopDiagnose <= model.To.Value)
                    .ToList();

                var elemWithoutDateStop = elements.Where(x => x.DateStopDiagnose == null).ToList();

                elemWithDateStop.AddRange(elemWithoutDateStop);

                elements = elemWithDateStop;
            }
            return elements;
        }

        public List<DiagnoseViewModel> GetFullList()
        {
            using var context = new PolyclinicDatabase();
            return context.Diagnoses
                .Include(x => x.User)
                .Select(x => x.GetViewModel)
                .ToList();
        }

        public DiagnoseViewModel? Insert(DiagnoseBindingModel model)
        {
            var element = Diagnose.Create(model);
            if (element == null)
            {
                return null;
            }
            using var context = new PolyclinicDatabase();
            context.Diagnoses.Add(element);
            context.SaveChanges();
            return element.GetViewModel;
        }

        public DiagnoseViewModel? Update(DiagnoseBindingModel model)
        {
            using var context = new PolyclinicDatabase();
            var element = context.Diagnoses.FirstOrDefault(x => x.Id == model.Id);
            if (element == null)
            {
                return null;
            }
            element.Update(model);
            context.SaveChanges();
            return element.GetViewModel;
        }
    }
}