using ComputersShopContracts.BindingModels;
using ComputersShopContracts.SearchModels;
using ComputersShopContracts.StoragesContracts;
using ComputersShopContracts.ViewModels;
using ComputersShopListImplement.Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;

namespace ComputersShopListImplement.Implements
{
    public class ShopStorage : IShopStorage
    {
        private readonly DataListSingleton _source;
        public ShopStorage()
        {
            _source = DataListSingleton.GetInstance();
        }
        public ShopViewModel? Delete(ShopBindingModel model)
        {
            for (int i = 0; i < _source.Shops.Count; ++i)
            {
                if (_source.Shops[i].Id == model.Id)
                {
                    var element = _source.Shops[i];
                    _source.Shops.RemoveAt(i);
                    return element.GetViewModel;
                }
            }
            return null;
        }

        public ShopViewModel? GetElement(ShopSearchModel model)
        {
            if (string.IsNullOrEmpty(model.ShopName) && !model.Id.HasValue)
            {
                return null;
            }

            foreach (var Shop in _source.Shops)
            {
                if ((!string.IsNullOrEmpty(model.ShopName) && Shop.ShopName == model.ShopName) || (model.Id.HasValue && Shop.Id == model.Id))
                {
                    return Shop.GetViewModel;
                }
            }

            return null;
        }

        public List<ShopViewModel> GetFilteredList(ShopSearchModel model)
        {
            var result = new List<ShopViewModel>();

            if (string.IsNullOrEmpty(model.ShopName))
            {
                return result;
            }

            foreach (var Shop in _source.Shops)
            {
                if (Shop.ShopName.Contains(model.ShopName))
                {
                    result.Add(Shop.GetViewModel);
                }
            }

            return result;
        }

        public List<ShopViewModel> GetFullList()
        {
            var result = new List<ShopViewModel>();

            foreach (var Shop in _source.Shops)
            {
                result.Add(Shop.GetViewModel);
            }

            return result;
        }

        public ShopViewModel? Insert(ShopBindingModel model)
        {
            model.Id = 1;

            foreach (var Shop in _source.Shops)
            {
                if (model.Id <= Shop.Id)
                {
                    model.Id = Shop.Id + 1;
                }
            }

            var newShop = Shop.Create(model);

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

            _source.Shops.Add(newShop);

            return newShop.GetViewModel;
        }

        public ShopViewModel? Update(ShopBindingModel model)
        {
            foreach (var Shop in _source.Shops)
            {
                if (Shop.Id == model.Id)
                {
                    Shop.Update(model);
                    return Shop.GetViewModel;
                }
            }

            return null;
        }
    }
}