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 ProceduresStorage : IProceduresStorage
    {
        public List<ProceduresViewModel> GetFullList()
        {
            using var context = new HospitalDatabase();
            return context.Procedures.Include(x => x.Client).Include(x => x.Medicines)
                .ThenInclude(x => x.Medicine)
            .Select(x => x.GetViewModel)
           .ToList();
        }
        public List<ProceduresViewModel> GetFilteredList(ProceduresSearchModel model)
        {
            if (!model.Id.HasValue && !model.ClientId.HasValue)
            {
                return new();
            }
            using var context = new HospitalDatabase();
                return context.Procedures.Include(x => x.Medicines)
                .ThenInclude(x => x.Medicine)
                    .Include(x => x.Client)
                    .Where(x => x.ClientId == model.ClientId)
           .Select(x => x.GetViewModel)
           .ToList();
        }
        public ProceduresViewModel? GetElement(ProceduresSearchModel model)
        {
            if (string.IsNullOrEmpty(model.ProceduresName) && !model.Id.HasValue)
            {
                return null;
            }
            using var context = new HospitalDatabase();
            return context.Procedures.Include(x => x.Client).Include(x => x.Medicines)
                .ThenInclude(x => x.Medicine)
            .FirstOrDefault(x =>
           (!string.IsNullOrEmpty(model.ProceduresName) && x.ProceduresName ==
           model.ProceduresName) ||
            (model.Id.HasValue && x.Id == model.Id))
            ?.GetViewModel;
        }
        public ProceduresViewModel? Insert(ProceduresBindingModel model)
        {
            var newProcedures = Procedures.Create(model);
            if (newProcedures == null)
            {
                return null;
            }
            using var context = new HospitalDatabase();
            context.Procedures.Add(newProcedures);
            context.SaveChanges();
            return context.Procedures.Include(x => x.Client)
                .Include(x => x.Medicines)
                .ThenInclude(x => x.Medicine).FirstOrDefault(x => x.Id == newProcedures.Id)
                          ?.GetViewModel;
        }
        public ProceduresViewModel? Update(ProceduresBindingModel model)
        {
            using var context = new HospitalDatabase();
            using var transaction = context.Database.BeginTransaction();
            try
            {
                var procedure = context.Procedures.FirstOrDefault(x => x.Id == model.Id);
            if (procedure == null)
            {
                return null;
            }
            procedure.Update(model);
            context.SaveChanges();
                if (model.ProcedureMedicine != null)
                {
                    procedure.UpdateMedicines(context, model);
                }
                transaction.Commit();
                return procedure.GetViewModel;
            }
            catch
            {
                transaction.Rollback();
                throw;
            }
        }
        public ProceduresViewModel? Delete(ProceduresBindingModel model)
        {
            using var context = new HospitalDatabase();
            var element = context.Procedures.Include(x => x.Medicines)
                .ThenInclude(x => x.Medicine)
                .Include(x => x.Client).FirstOrDefault(rec => rec.Id == model.Id);
            if (element != null)
            {
                context.Procedures.Remove(element);
                context.SaveChanges();
                return element.GetViewModel;
            }
            return null;
        }
    }
}