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

namespace AircraftPlantDatabaseImplement.Implements
{
    public class PlaneStorage : IPlaneStorage
    {
        public List<PlaneViewModel> GetFullList()
        {
            using var context = new AircraftPlantDatabase();
            return context.Planes
             .Include(x => x.Components)
            .ThenInclude(x => x.Component)
            .ToList()
            .Select(x => x.GetViewModel)
            .ToList();
        }
        public List<PlaneViewModel> GetFilteredList(PlaneSearchModel model)
        {
            if (string.IsNullOrEmpty(model.PlaneName))
            {
                return new();
            }
            using var context = new AircraftPlantDatabase();
            return context.Planes
             .Include(x => x.Components)
            .ThenInclude(x => x.Component)
            .Where(x => x.PlaneName.Contains(model.PlaneName))
            .ToList()
            .Select(x => x.GetViewModel)
            .ToList();
        }
        public PlaneViewModel? GetElement(PlaneSearchModel model)
        {
            if (string.IsNullOrEmpty(model.PlaneName) &&
            !model.Id.HasValue)
            {
                return null;
            }
            using var context = new AircraftPlantDatabase();
            return context.Planes
             .Include(x => x.Components)
             .ThenInclude(x => x.Component)
             .FirstOrDefault(x => (!string.IsNullOrEmpty(model.PlaneName) &&
            x.PlaneName == model.PlaneName) ||
            (model.Id.HasValue && x.Id ==
            model.Id))
            ?.GetViewModel;
        }
        public PlaneViewModel? Insert(PlaneBindingModel model)
        {
            using var context = new AircraftPlantDatabase();
            var newPlane = Plane.Create(context, model);
            if (newPlane == null)
            {
                return null;
            }
            context.Planes.Add(newPlane);
            context.SaveChanges();
            return newPlane.GetViewModel;
        }
        public PlaneViewModel? Update(PlaneBindingModel model)
        {
            using var context = new AircraftPlantDatabase();
            using var transaction = context.Database.BeginTransaction();
            try
            {
                var plane = context.Planes.FirstOrDefault(rec =>
                rec.Id == model.Id);
                if (plane == null)
                {
                    return null;
                }
                plane.Update(model);
                context.SaveChanges();
                plane.UpdateComponents(context, model);
                transaction.Commit();
                return plane.GetViewModel;
            }
            catch
            {
                transaction.Rollback();
                throw;
            }
        }
        public PlaneViewModel? Delete(PlaneBindingModel model)
        {
            using var context = new AircraftPlantDatabase();
            var element = context.Planes
            .Include(x => x.Components)
            .FirstOrDefault(rec => rec.Id == model.Id);
            if (element != null)
            {
                context.Planes.Remove(element);
                context.SaveChanges();
                return element.GetViewModel;
            }
            return null;
        }
    }
}