using AutomobilePlantContracts.BindingModels;
using AutomobilePlantContracts.SearchModels;
using AutomobilePlantContracts.StorageContracts;
using AutomobilePlantContracts.ViewModels;
using AutomobilePlantDatabaseImplement.Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace AutomobilePlantDatabaseImplement.Implements
{
    public class ImplementerStorage : IImplementerStorage
    {
        public ImplementerViewModel? GetElement(ImplementerSearchModel model)
        {
            using var context = new AutomobilePlantDatabase();
            if (model.Id.HasValue) return context.Implementers.FirstOrDefault(x => x.Id == model.Id)?.GetViewModel;
            if (model.ImplementerFIO != null && model.Password != null) return context.Implementers.FirstOrDefault(x => x.ImplementerFIO.Equals(model.ImplementerFIO) && x.Password.Equals(model.Password))?.GetViewModel;
            if (model.ImplementerFIO != null) return context.Implementers.FirstOrDefault(x => x.ImplementerFIO.Equals(model.ImplementerFIO))?.GetViewModel;
            return null;
        }

        public List<ImplementerViewModel> GetFilteredList(ImplementerSearchModel model)
        {
            if (model == null)
            {
                return new();
            }
            if (model.ImplementerFIO != null)
            {
                using var context = new AutomobilePlantDatabase();
                return context.Implementers
                    .Where(x => x.ImplementerFIO.Contains(model.ImplementerFIO))
                    .Select(x => x.GetViewModel)
                    .ToList();
            }
            return new();
        }

        public List<ImplementerViewModel> GetFullList()
        {
            using var context = new AutomobilePlantDatabase();
            return context.Implementers.Select(x => x.GetViewModel).ToList();
        }

        public ImplementerViewModel? Insert(ImplementerBindingModel model)
        {
            using var context = new AutomobilePlantDatabase();
            var res = Implementer.Create(model);
            if (res != null)
            {
                context.Implementers.Add(res);
                context.SaveChanges();
            }
            return res?.GetViewModel;
        }

        public ImplementerViewModel? Update(ImplementerBindingModel model)
        {
            using var context = new AutomobilePlantDatabase();
            var res = context.Implementers.FirstOrDefault(x => x.Id == model.Id);
            if (res != null)
            {
                res.Update(model);
                context.SaveChanges();
            }
            return res?.GetViewModel;
        }

        public ImplementerViewModel? Delete(ImplementerBindingModel model)
        {
            using var context = new AutomobilePlantDatabase();
            var res = context.Implementers.FirstOrDefault(x => x.Id == model.Id);
            if (res != null)
            {
                context.Implementers.Remove(res);
                context.SaveChanges();
            }
            return res?.GetViewModel;
        }
    }
}