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

namespace PolyclinicDatabaseImplement.Implements
{
    public class MedicamentStorage : IMedicamentStorage
    {
        public List<MedicamentViewModel> GetFullList()
        {
            using var context = new PolyclinicDatabase();
            return context.Medicaments
                .Include(x => x.Symptom)
                .Include(x => x.Procedure)
                .Select(x => x.GetViewModel)
                .ToList();
        }

        public List<MedicamentViewModel> GetFilteredList(MedicamentSearchModel model)
        {
            using var context = new PolyclinicDatabase();

            if (!model.Id.HasValue || !string.IsNullOrEmpty(model.Name))
            {
                return new();
            }

            return context.Medicaments
                .Where(x => x.Id == model.Id || model.Name == x.Name)
                .Include(x => x.Symptom)
                .Include(x => x.Procedure)
                .Select(x => x.GetViewModel)
                .ToList();
        }

        public MedicamentViewModel? GetElement(MedicamentSearchModel model)
        {
            if (!model.Id.HasValue)
            {
                return null;
            }
            using var context = new PolyclinicDatabase();
            return context.Medicaments
                .Include(x => x.Symptom)
                .Include(x => x.Procedure)
                .FirstOrDefault(x => (model.Id.HasValue && x.Id == model.Id))?
                .GetViewModel;
        }

        public MedicamentViewModel? Insert(MedicamentBindingModel model)
        {
            using var context = new PolyclinicDatabase();

            var newMedicament = Medicament.Create(model);
            if(newMedicament == null)
            {
                return null;
            }
            context.Medicaments.Add(newMedicament);
            context.SaveChanges();
            return context.Medicaments
                .Include(x => x.Symptom)
                .Include(x => x.Procedure)
                .FirstOrDefault(x => x.Id == newMedicament.Id)?.GetViewModel;
        }

        public MedicamentViewModel? Update(MedicamentBindingModel model)
        {
            using var context = new PolyclinicDatabase();
            var medicament = context.Medicaments.FirstOrDefault(x => x.Id == model.Id);
            if (medicament == null)
            {
                return null;
            }
            medicament.Update(model);
            context.SaveChanges();
            return context.Medicaments
                .Include(x => x.Symptom)
                .Include(x => x.Procedure)
                .FirstOrDefault(x => x.Id == model.Id)?.GetViewModel;
        }
        public MedicamentViewModel? Delete(MedicamentBindingModel model)
        {
            using var context = new PolyclinicDatabase();
            var element = context.Medicaments.FirstOrDefault(rec => rec.Id == model.Id);
            if (element != null)
            {
                context.Medicaments.Remove(element);
                context.SaveChanges();
                return element.GetViewModel;
            }
            return null;
        }
    }
}