using Microsoft.EntityFrameworkCore;
using ServiceStationContracts.BindingModels;
using ServiceStationContracts.SearchModels;
using ServiceStationContracts.ViewModels;
using ServiceStationDataModels;
using ServiceStationsContracts.StorageContracts;
using ServiceStationsDataBaseImplement.Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ServiceStationsDataBaseImplement.Implements
{
    public class ExecutorStorage : IExecutorStorage
    {
        public ExecutorViewModel? Insert(ExecutorBindingModel model) {
            var newRec = Executor.Create(model);
            if (newRec == null) {
                return null;
            }
            using var context = new Database();
            context.Executors.Add(newRec);
            context.SaveChanges();
            return newRec.GetViewModel;
        }

        public ExecutorViewModel? Update(ExecutorBindingModel model) {
            using var context = new Database();
            var recUp = context.Executors.FirstOrDefault(x => x.Id == model.Id);
            if (recUp == null) {
                return null;
            }
            recUp.Update(model);
            context.SaveChanges();
            return recUp.GetViewModel;
        }

        public ExecutorViewModel? Delete(ExecutorBindingModel model)
        {
            using var context = new Database();
            var recDel = context.Executors
                .Include(x => x.Works)
                .FirstOrDefault(rec => rec.Id == model.Id);
            if (recDel != null)
            {
                context.Executors.Remove(recDel);
                context.SaveChanges();
                return recDel.GetViewModel;
            }
            return null;
        }

        public ExecutorViewModel? GetElement(ExecutorSearchModel model)
        {
            using var context = new Database(); 
            if (model.Id.HasValue) {
                return context.Executors
                    .Include(x => x.Works)
                    .FirstOrDefault(x => x.Id == model.Id)
                    ?.GetViewModel;
            }
            else {
                return context.Executors
                    .Include (x => x.Works)
                    .FirstOrDefault(x => x.Email == model.Email)
                    ?.GetViewModel;
            }
        }

        public List<ExecutorViewModel> GetFullList()
        {
            using var context = new Database();
            return context.Executors.Select(x => x.GetViewModel).ToList();
        }
    }
}