using SecuritySystemContracts.BindingModels;
using SecuritySystemContracts.ViewModels;
using SecuritySystemDataModels.Models;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace SecuritySystemDatabaseImplement.Models
{
    public class Secure : ISecureModel
    {
        public int Id { get; set; }

        [Required]
        public string SecureName { get; set; } = string.Empty;

        [Required]
        public double Price { get; set; }

        public Dictionary<int, (ISensorModel, int)>? _secureSensors = null;

        //это поле не будет "мапиться" в бд
        [NotMapped]
        public Dictionary<int, (ISensorModel, int)> SecureSensors
        {
            get
            {
                if (_secureSensors == null)
                {
                    _secureSensors = Sensors
                        .ToDictionary(recPC => recPC.SensorId, recPC => (recPC.Sensor as ISensorModel, recPC.Count));
                }

                return _secureSensors;
            }
        }

        //для реализации связи многие ко многим с заготовками
        [ForeignKey("SecureId")]
        public virtual List<SecureSensor> Sensors { get; set; } = new();

        [ForeignKey("SecureId")]
        public virtual List<Order> Orders { get; set; } = new();

        public static Secure Create(SecuritySystemDatabase context, SecureBindingModel model)
        {
            return new Secure()
            {
                Id = model.Id,
                SecureName = model.SecureName,
                Price = model.Price,
                Sensors = model.SecureSensors.Select(x => new SecureSensor
                {
                    Sensor = context.Sensors.First(y => y.Id == x.Key),
                    Count = x.Value.Item2
                }).ToList()
            };
        }

        public void Update(SecureBindingModel model)
        {
            SecureName = model.SecureName;
            Price = model.Price;
        }

        public SecureViewModel GetViewModel => new()
        {
            Id = Id,
            SecureName = SecureName,
            Price = Price,
            SecureSensors = SecureSensors
        };

        Dictionary<int, (ISensorModel, int)> ISecureModel.SecureSensors => throw new NotImplementedException();

        public void UpdateSensors(SecuritySystemDatabase context, SecureBindingModel model)
        {
            var secureSensors = context.SecureSensors.Where(rec => rec.SecureId == model.Id).ToList();

            if (secureSensors != null && secureSensors.Count > 0)
            {
                // удалили те, которых нет в модели
                context.SecureSensors.RemoveRange(secureSensors.Where(rec => !model.SecureSensors.ContainsKey(rec.SecureId)));
                context.SaveChanges();

                // обновили количество у существующих записей
                foreach (var updateSecure in secureSensors)
                {
                    updateSecure.Count = model.SecureSensors[updateSecure.SecureId].Item2;
                    model.SecureSensors.Remove(updateSecure.SecureId);
                }

                context.SaveChanges();
            }

            var secure = context.Secures.First(x => x.Id == Id);

            foreach (var pc in model.SecureSensors)
            {
                context.SecureSensors.Add(new SecureSensor
                {
                    Secure = secure,
                    Sensor = context.Sensors.First(x => x.Id == pc.Key),
                    Count = pc.Value.Item2
                });

                context.SaveChanges();
            }

            _secureSensors = null;
        }
    }
}