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using AngleSharp;
using AngleSharp.Dom;
using Newtonsoft.Json;
using System.Linq;
using System.Threading.Tasks;

namespace RehauSku.Assistant
{
    static class ParseUtil
    {
        public async static Task<IDocument> ContentToDocAsync(string content)
        {
            IConfiguration config = Configuration.Default;
            IBrowsingContext context = BrowsingContext.New(config);

            return await context.OpenAsync(req => req.Content(content));
        }

        public static IProduct GetProduct(IDocument document)
        {
            string script = document
                .Scripts
                .Where(s => s.InnerHtml.Contains("dataLayer"))
                .FirstOrDefault()
                .InnerHtml;

            string json = script
                .Substring(script.IndexOf("push(") + 5)
                .TrimEnd(new[] { ')', ';', '\n', ' ' });

            if (!json.Contains("impressions"))
                return null;

            StoreResponce storeResponse = JsonConvert.DeserializeObject<StoreResponce>(json);
            IProduct product = storeResponse
                .Ecommerce
                .Impressions
                .Where(p => p.Id.IsRehauSku())
                .FirstOrDefault();

            return product;
        }
    }
}