using SecuritySystemContracts.BindingModels;
using SecuritySystemContracts.SearchModels;
using SecuritySystemContracts.StoragesContracts;
using SecuritySystemContracts.ViewModels;
using SecuritySystemDatabaseImplement.Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace SecuritySystemDatabaseImplement.Implements
{
    public class SensorStorage : ISensorStorage
    {
        public List<SensorViewModel> GetFullList()
        {
            using var context = new SecuritySystemDatabase();

            return context.Sensors
                    .Select(x => x.GetViewModel)
                    .ToList();
        }

        public List<SensorViewModel> GetFilteredList(SensorSearchModel model)
        {
            if (string.IsNullOrEmpty(model.SensorName))
            {
                return new();
            }

            using var context = new SecuritySystemDatabase();

            return context.Sensors
                    .Where(x => x.SensorName.Contains(model.SensorName))
                    .Select(x => x.GetViewModel)
                    .ToList();
        }

        public SensorViewModel? GetElement(SensorSearchModel model)
        {
            if (string.IsNullOrEmpty(model.SensorName) && !model.Id.HasValue)
            {
                return null;
            }

            using var context = new SecuritySystemDatabase();

            return context.Sensors
                    .FirstOrDefault(x => (!string.IsNullOrEmpty(model.SensorName) && x.SensorName == model.SensorName) ||
                                        (model.Id.HasValue && x.Id == model.Id))
                    ?.GetViewModel;
        }

        public SensorViewModel? Insert(SensorBindingModel model)
        {
            var newSensor = Sensor.Create(model);

            if (newSensor == null)
            {
                return null;
            }

            using var context = new SecuritySystemDatabase();
            context.Sensors.Add(newSensor);
            context.SaveChanges();

            return newSensor.GetViewModel;
        }

        public SensorViewModel? Update(SensorBindingModel model)
        {
            using var context = new SecuritySystemDatabase();
            var sensor = context.Sensors.FirstOrDefault(x => x.Id == model.Id);

            if (sensor == null)
            {
                return null;
            }

            sensor.Update(model);
            context.SaveChanges();

            return sensor.GetViewModel;
        }

        public SensorViewModel? Delete(SensorBindingModel model)
        {
            using var context = new SecuritySystemDatabase();
            var element = context.Sensors.FirstOrDefault(rec => rec.Id == model.Id);

            if (element != null)
            {
                context.Sensors.Remove(element);
                context.SaveChanges();

                return element.GetViewModel;
            }

            return null;
        }
    }
}