using Microsoft.EntityFrameworkCore;
using PrecastConcretePlantContracts.BindingModels;
using PrecastConcretePlantContracts.SearchModels;
using PrecastConcretePlantContracts.StoragesContracts;
using PrecastConcretePlantContracts.ViewModels;
using PrecastConcretePlantDatabaseImplement.Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace PrecastConcretePlantDatabaseImplement.Implements
{
    public class ImplementerStorage : IImplementerStorage
    {
        public List<ImplementerViewModel> GetFullList()
        {
            using var context = new PrecastConcretePlantDatabase();
            return context.Implementers
                    .Select(x => x.GetViewModel)
                    .ToList();
        }

        public List<ImplementerViewModel> GetFilteredList(ImplementerSearchModel model)
        {
            if (model == null)
            {
                return new();
            }

            if (model.Id.HasValue)
            {
                var implementer = GetElement(model);

                return implementer != null ? new() { implementer } : new();
            }

            if (model.ImplementerFIO != null)
            {
                using var context = new SoftwareInstallationDataBase();

                return context.Implementers
                    .Where(x => x.ImplementerFIO.Equals(model.ImplementerFIO))
                    .Select(x => x.GetViewModel)
                    .ToList();
            }

            return new();
        }

        public ImplementerViewModel? GetElement(ImplementerSearchModel model)
        {
            using var context = new PrecastConcretePlantDatabase();
            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 ImplementerViewModel? Insert(ImplementerBindingModel model)
        {
            using var context = new PrecastConcretePlantDatabase();
            var implementer = Implementer.Create(model);

            if (implementer != null)
            {
                context.Implementers.Add(implementer);
                context.SaveChanges();
            }

            return implementer?.GetViewModel;
        }

        public ImplementerViewModel? Update(ImplementerBindingModel model)
        {
            using var context = new PrecastConcretePlantDatabase();
            var implementer = context.Implementers
               .FirstOrDefault(x => x.Id == model.Id);

            if (implementer != null)
            {
                implementer.Update(model);
                context.SaveChanges();
            }

            return implementer?.GetViewModel;
        }

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