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

namespace SecuritySystemFileImplement.Implements
{
    //реализация интерфейса хранилища изделий
    public class SecureStorage : ISecureStorage
    {
        private readonly DataFileSingleton source;

        public SecureStorage()
        {
            source = DataFileSingleton.GetInstance();
        }

        public List<SecureViewModel> GetFullList()
        {
            return source.Secures.Select(x => x.GetViewModel).ToList();
        }

        public List<SecureViewModel> GetFilteredList(SecureSearchModel model)
        {
            if (string.IsNullOrEmpty(model.SecureName))
            {
                return new();
            }

            return source.Secures.Where(x => x.SecureName.Contains(model.SecureName)).Select(x => x.GetViewModel).ToList();
        }

        public SecureViewModel? GetElement(SecureSearchModel model)
        {
            if (string.IsNullOrEmpty(model.SecureName) && !model.Id.HasValue)
            {
                return null;
            }

            return source.Secures.FirstOrDefault(x => (!string.IsNullOrEmpty(model.SecureName) && x.SecureName == model.SecureName)
                || (model.Id.HasValue && x.Id == model.Id))?.GetViewModel;
        }

        public SecureViewModel? Insert(SecureBindingModel model)
        {
            model.Id = source.Secures.Count > 0 ? source.Secures.Max(x => x.Id) + 1 : 1;

            var newSecure = Secure.Create(model);

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

            source.Secures.Add(newSecure);
            source.SaveSecures();

            return newSecure.GetViewModel;
        }

        public SecureViewModel? Update(SecureBindingModel model)
        {
            var secure = source.Secures.FirstOrDefault(x => x.Id == model.Id);

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

            secure.Update(model);
            source.SaveSecures();

            return secure.GetViewModel;
        }

        public SecureViewModel? Delete(SecureBindingModel model)
        {
            var element = source.Secures.FirstOrDefault(x => x.Id == model.Id);

            if (element != null)
            {
                source.Secures.Remove(element);
                source.SaveSecures();

                return element.GetViewModel;
            }

            return null;
        }
    }
}