using Grand.Business.Core.Extensions;
using Grand.Business.Core.Interfaces.Catalog.Products;
using Grand.Domain.Catalog;
using Grand.Web.Features.Models.Products;
using Grand.Web.Models.Catalog;
using MediatR;
using System.Net;

namespace Grand.Web.Features.Handlers.Products;

public class GetProductSpecificationHandler : IRequestHandler<GetProductSpecification, IList<ProductSpecificationModel>>
{
    private readonly ISpecificationAttributeService _specificationAttributeService;

    public GetProductSpecificationHandler(ISpecificationAttributeService specificationAttributeService)
    {
        _specificationAttributeService = specificationAttributeService;
    }

    public async Task<IList<ProductSpecificationModel>> Handle(GetProductSpecification request,
        CancellationToken cancellationToken)
    {
        if (request.Product == null)
            throw new ArgumentNullException(nameof(request.Product));

        var spa = new List<ProductSpecificationModel>();
        foreach (var item in request.Product.ProductSpecificationAttributes.Where(x => x.ShowOnProductPage)
                     .OrderBy(x => x.DisplayOrder))
        {
            var m = new ProductSpecificationModel {
                SpecificationAttributeName = item.CustomName
            };

            switch (item.AttributeTypeId)
            {
                case SpecificationAttributeType.Option:
                    var specificationAttribute =
                        await _specificationAttributeService.GetSpecificationAttributeById(
                            item.SpecificationAttributeId);
                    if (specificationAttribute != null)
                    {
                        m.SpecificationAttributeId = item.SpecificationAttributeId;
                        m.SpecificationAttributeName =
                            specificationAttribute.GetTranslation(x => x.Name, request.Language.Id);
                        m.ColorSquaresRgb =
                            specificationAttribute.SpecificationAttributeOptions.FirstOrDefault(x =>
                                x.Id == item.SpecificationAttributeOptionId) != null
                                ? specificationAttribute.SpecificationAttributeOptions.FirstOrDefault(x =>
                                    x.Id == item.SpecificationAttributeOptionId)!.ColorSquaresRgb
                                : "";
                        m.UserFields = specificationAttribute.UserFields;
                        m.ValueRaw = WebUtility.HtmlEncode(specificationAttribute.SpecificationAttributeOptions
                            .FirstOrDefault(x => x.Id == item.SpecificationAttributeOptionId)
                            .GetTranslation(x => x.Name, request.Language.Id));
                    }

                    break;
                case SpecificationAttributeType.CustomText:
                    m.ValueRaw = WebUtility.HtmlEncode(item.CustomValue);
                    break;
                case SpecificationAttributeType.CustomHtmlText:
                    m.ValueRaw = item.CustomValue;
                    break;
                case SpecificationAttributeType.Hyperlink:
                    m.ValueRaw = string.Format("<a href='{0}' target='_blank'>{0}</a>", item.CustomValue);
                    break;
            }

            spa.Add(m);
        }

        return spa;
    }
}