using TransportCompanyContracts.BindingModels;
using TransportCompanyContracts.SearchModels;
using TransportCompanyContracts.StoragesContracts;
using TransportCompanyContracts.ViewModels;
using TransportCompanyDatabaseImplement.Models;

namespace TransportCompanyDatabaseImplement.Implements
{
    public class PointStorage : IPointStorage
    {
        public List<PointViewModel> GetFullList()
        {
            using var context = new TransportCompanyDatabase();
            return context.Points.Select(x => x.GetViewModel).ToList();
        }

        public List<PointViewModel> GetFilteredList(PointSearchModel model)
        {
            if (string.IsNullOrEmpty(model.PointName))
            {
                return new();
            }
            using var context = new TransportCompanyDatabase();
            return context.Points.Where(x => x.PointName.Contains(model.PointName)).Select(x => x.GetViewModel).ToList();
        }

        public PointViewModel? GetElement(PointSearchModel model)
        {
            if (string.IsNullOrEmpty(model.PointName) && !model.Id.HasValue)
            {
                return null;
            }
            using var context = new TransportCompanyDatabase();
            return context.Points.FirstOrDefault(x =>
            (!string.IsNullOrEmpty(model.PointName) && x.PointName == model.PointName) ||
            (model.Id.HasValue && x.Id == model.Id))
                ?.GetViewModel;
        }

        public PointViewModel? Insert(PointBindingModel model)
        {
            var newComponent = Point.Create(model);
            if (newComponent == null)
            {
                return null;
            }
            using var context = new TransportCompanyDatabase();
            context.Points.Add(newComponent);
            context.SaveChanges();
            return newComponent.GetViewModel;
        }

        public PointViewModel? Update(PointBindingModel model)
        {
            using var context = new TransportCompanyDatabase();
            var component = context.Points.FirstOrDefault(x => x.Id == model.Id);
            if (component == null)
            {
                return null;
            }
            component.Update(model);
            context.SaveChanges();
            return component.GetViewModel;
        }

        public PointViewModel? Delete(PointBindingModel model)
        {
            using var context = new TransportCompanyDatabase();
            var element = context.Points.FirstOrDefault(rec => rec.Id == model.Id);
            if (element != null)
            {
                context.Points.Remove(element);
                context.SaveChanges();
                return element.GetViewModel;
            }
            return null;
        }
    }
}