using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Html;
using Microsoft.AspNetCore.Mvc;
using System;
using System.Collections.Generic;
using System.IO;

namespace MisIngredientesVue.Extensions
{
    public static class EnumerableExtensions
    {
        public static IEnumerable<TSource> DistinctBy<TSource, TKey>(this IEnumerable<TSource> source, Func<TSource, TKey> keySelector)
        {
            HashSet<TKey> seenKeys = new HashSet<TKey>();
            foreach (TSource element in source)
            {
                if (seenKeys.Add(keySelector(element)))
                {
                    yield return element;
                }
            }
        }
    }

    public static class HtmlHelpers
    {
        public static HtmlString GetCompanyLogoAsBase64(this IUrlHelper urlHelper, string filePath)
        {
            return null;
            //filePath = filePath.Replace("~/", "");
            //var env = urlHelper.ActionContext.HttpContext.RequestServices.GetService<IWebHostEnvironment>();
            //var fileInfo = env.ContentRootFileProvider.GetFileInfo(filePath);
            //return urlHelper.GetFileAsBase64(fileInfo.PhysicalPath);
        }

        public static HtmlString GetFileAsBase64(this IUrlHelper htmlHelper, string filePath)
        {
            string fileAsBase64;
            using (var reader = new FileStream(filePath, FileMode.Open, FileAccess.Read))
            {
                var buffer = new byte[reader.Length];
                reader.Read(buffer, 0, (int)reader.Length);
                fileAsBase64 = Convert.ToBase64String(buffer);
            }
            return new HtmlString(fileAsBase64);
        }
    }
}