using Core.DomainObjects;
using Core.Enumerations;
using DataProviders;
using DomainResults.Common;
using WeatherForecast.Models;
using WeatherForecast.Models.Responses;

namespace WeatherForecast.Services {

  public interface IShopItemsService {
    (GetShopItemsResponseModel?, IDomainResult) Get(Guid siteId, Guid? category, int currentPage, int itemsPerPage, Locales locale, string? searchText);
    IDomainResult Delete(Guid siteId);
  }

  public class ShopItemsService : IShopItemsService {
    private readonly ILogger<ShopItemsService> _logger;
    private readonly IShopCatalogDataProvider _shopCatalogDataProvider;
    private readonly ICategoryDataProvider _categoryDataProvider;

    public ShopItemsService(
      ILogger<ShopItemsService> logger,
      IShopCatalogDataProvider shopCatalogDataprovider,
      ICategoryDataProvider categoryDataProvider
    ) {
      _logger = logger;
      _shopCatalogDataProvider = shopCatalogDataprovider;
      _categoryDataProvider = categoryDataProvider;
    }

    public (GetShopItemsResponseModel?, IDomainResult) Get(Guid siteId, Guid? category, int currentPage, int itemsPerPage, Locales locale, string? searchText) {
      var (items, result) = _shopCatalogDataProvider.GetAll(siteId, currentPage > 0 ? ((currentPage - 1) * itemsPerPage) : 0, itemsPerPage);

      if (!result.IsSuccess || items == null)
        return (null, result);


      var shopItems = new List<GetShopItemResponseModel>();
      foreach (var item in items) {
        var categories = new List<Category>();
        foreach (var catId in item.Categories) {
          var (cat, getCategoryResult) = _categoryDataProvider.Get(siteId, catId);
          if (!getCategoryResult.IsSuccess || cat == null)
            return (null, getCategoryResult);

          categories.Add(cat);
        }
        shopItems.Add(new GetShopItemResponseModel(item, categories, locale));
      }

      return shopItems.Count > 0
        ? IDomainResult.Success(new GetShopItemsResponseModel(currentPage, 0, shopItems))
        : IDomainResult.NotFound<GetShopItemsResponseModel?>();
    }


    public IDomainResult Delete(Guid siteId)  => _shopCatalogDataProvider.DeleteAll(siteId);
  }
}