using Microsoft.EntityFrameworkCore;
using PolyclinicContracts.BindingModels;
using PolyclinicContracts.SearchModels;
using PolyclinicContracts.StoragesContracts;
using PolyclinicContracts.ViewModels;
using PolyclinicDatabaseImplement.Models;
using SecuritySystemDatabaseImplement;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace PolyclinicDatabaseImplement.Implements
{
    public class ProcedureStorage : IProcedureStorage
    {
        public List<ProcedureViewModel> GetFullList()
        {
            using var database = new PolyclinicDatabase();
            return database.Procedures
                .Include(x => x.Recipes)
                .ThenInclude(x => x.Recipe)
                .ToList()
                .Select(x => x.GetViewModel)
                .ToList();
        }

        public List<ProcedureViewModel> GetFilteredList(ProcedureSearchModel model)
        {
            if (string.IsNullOrEmpty(model.Name))
            {
                return new();
            }
            using var database = new PolyclinicDatabase();
            return database.Procedures
                .Include(x => x.Recipes)
                .ThenInclude(x => x.Recipe)
                .Where(x => x.Name == model.Name)
                .Select(x => x.GetViewModel)
                .ToList();
        }

        public ProcedureViewModel? GetElement(ProcedureSearchModel model)
        {
            if (string.IsNullOrEmpty(model.Name) &&
            !model.Id.HasValue)
            {
                return null;
            }
            using var database = new PolyclinicDatabase();
            return database.Procedures
             .Include(x => x.Recipes)
             .ThenInclude(x => x.Recipe)
             .FirstOrDefault(x => (!string.IsNullOrEmpty(model.Name) && x.Name == model.Name) ||
             (model.Id.HasValue && x.Id == model.Id))?.GetViewModel;
        }

        public ProcedureViewModel? Insert(ProcedureBindingModel model)
        {
            using var database = new PolyclinicDatabase();
            var newProcedure = Procedure.Create(database, model);
            if (newProcedure == null)
            {
                return null;
            }
            database.Procedures.Add(newProcedure);
            database.SaveChanges();
            return newProcedure.GetViewModel;
        }
        public ProcedureViewModel? Update(ProcedureBindingModel model)
        {
            using var database = new PolyclinicDatabase();
            using var transaction = database.Database.BeginTransaction();
            try
            {
                var Procedure = database.Procedures.FirstOrDefault(rec => rec.Id == model.Id);
                if (Procedure == null)
                {
                    return null;
                }
                Procedure.Update(model);
                database.SaveChanges();
                Procedure.UpdateRecipes(database, model);
                transaction.Commit();
                return Procedure.GetViewModel;
            }
            catch
            {
                transaction.Rollback();
                throw;
            }
        }
        public ProcedureViewModel? Delete(ProcedureBindingModel model)
        {
            using var database = new PolyclinicDatabase();
            var element = database.Procedures
            .Include(x => x.Recipes)
            .FirstOrDefault(rec => rec.Id == model.Id);
            if (element != null)
            {
                database.Procedures.Remove(element);
                database.SaveChanges();
                return element.GetViewModel;
            }
            return null;
        }
    }
}