using DomainResults.Common;

using DataProviders.Collections;

using Core.Abstractions;
using DomainObjects.Documents;
using DomainObjects.Enumerations;
using WeatherForecast.Models.ShopCart.Requests;
using WeatherForecast.Models.ShopCart.Responses;
using DomainObjects.Documents.Sites;

namespace WeatherForecast.Services
{

    /// <summary>
    /// 
    /// </summary>
    public interface IShopCartItemsService {

    /// <summary>
    /// 
    /// </summary>
    /// <param name="cartItems"></param>
    /// <param name="requestData"></param>
    /// <returns></returns>
    (List<GetShopCartItemLocalizedResponseModel>?, IDomainResult) Get(List<ShopCartDocument> cartItems, GetShopCartItemsLocalizedRequestModel requestData);
  }

  /// <summary>
  /// 
  /// </summary>
  public class ShopCartItemsService : ServiceBase<ShopCartItemsService>, IShopCartItemsService {

    private readonly IShopCatalogDataProvider _shopCatalogDataProvider;
    private readonly IShopCartDataProvider _shopCartDataProvider;

    /// <summary>
    /// 
    /// </summary>
    /// <param name="logger"></param>
    /// <param name="shopCatalogDataProvider"></param>
    /// <param name="shopCartDataprovider"></param>
    public ShopCartItemsService(
      ILogger<ShopCartItemsService> logger,
      IShopCatalogDataProvider shopCatalogDataProvider,
      IShopCartDataProvider shopCartDataprovider
    ) : base(logger) {
      _shopCatalogDataProvider = shopCatalogDataProvider;
      _shopCartDataProvider = shopCartDataprovider;
    }

    /// <summary>
    /// 
    /// </summary>
    /// <param name="cartItems"></param>
    /// <param name="requestData"></param>
    /// <returns></returns>
    public (List<GetShopCartItemLocalizedResponseModel>?, IDomainResult) Get(List<ShopCartDocument> cartItems, GetShopCartItemsLocalizedRequestModel requestData) {

      //var (count, getCountResult) = _shopCatalogDataProvider.Count(siteId);
      //if (!getCountResult.IsSuccess || count == null)
      //  return (null, getCountResult);

      //var skip = (requestData.CurrentPage - 1) * requestData.ItemsPerPage;
      //var take = requestData.ItemsPerPage;

      //var totalPages = (int)Math.Ceiling((decimal)count / take);

      var items = new List<GetShopCartItemLocalizedResponseModel>();
      foreach (var cartItem in cartItems) {
        var (item, result) = _shopCatalogDataProvider.Get(cartItem.Id, cartItem.Sku);
        if (!result.IsSuccess || item == null) {
          var delteResult = _shopCartDataProvider.Delete(cartItem.Id);
          if (!delteResult.IsSuccess)
            return (null, delteResult);
        }
        else
          items.Add(new GetShopCartItemLocalizedResponseModel(item, cartItem, requestData.Locale));
      }

      return items.Count > 0
        ? IDomainResult.Success(items)
        : IDomainResult.NotFound<List<GetShopCartItemLocalizedResponseModel>?>();
    }
  }
}