using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Net;
using System.Threading.Tasks;
using HtmlAgilityPack;
using Microsoft.AspNetCore.Mvc;
using Seo.Models;
using Seo.Utilities;

namespace Seo.Controllers
{
    public class HomeController : Controller
    {
        private readonly ITitleTagValidate _titleTagValidate;
        private readonly Ih1h6TagsValidate _h1h6TagsValidate;
        private readonly IKeyWordValidate _keyWordValidate;
        private readonly IPicturesAltValidate _picturesAltValidate;
        private readonly IWebsiteContentValidate _websiteContentValidate;
        private readonly IDescriptionValidate _descriptionValidate;
        private readonly IExternalFilesValidate _externalFilesValidate;
        private readonly ISslValidate _sslValidate;


        public HomeController(ITitleTagValidate titleTagValidate, IKeyWordValidate keyWordValidate, IWebsiteContentValidate websiteContentValidate, IPicturesAltValidate picturesAltValidate, IDescriptionValidate descriptionValidate, IExternalFilesValidate externalFilesValidate, ISslValidate sslValidate, Ih1h6TagsValidate h1h6TagsValidate)
        {
            _titleTagValidate = titleTagValidate;
            _h1h6TagsValidate = h1h6TagsValidate;
            _keyWordValidate = keyWordValidate;
            _picturesAltValidate = picturesAltValidate;
            _websiteContentValidate = websiteContentValidate;
            _descriptionValidate = descriptionValidate;
            _externalFilesValidate = externalFilesValidate;
            _sslValidate = sslValidate;
        }
        [HttpGet]
        public IActionResult Index()
        {
            return View();
        }

        [HttpPost]
        public IActionResult Index(string url)
        {
            var web = new HtmlWeb();
            var document = web.Load(url);
            h1h6TagsValidate h = new h1h6TagsValidate();
            Website website = new Website();
            string websideContent = document.DocumentNode.OuterHtml;
            var htmlBody = document.DocumentNode.SelectSingleNode("//body");
            var nodes = document.DocumentNode.SelectNodes("//h1");

            string titleTagFromWebside = document.DocumentNode.SelectSingleNode("//head/title")?.WriteContentTo();
            website.titleTag = _titleTagValidate.TitleTagChecker(titleTagFromWebside);
            website.h1Tag = _h1h6TagsValidate.h1h6TagsChecker(document.DocumentNode.SelectNodes("//h1"));//nodes);
            website.h2Tag = _h1h6TagsValidate.h1h6TagsChecker(document.DocumentNode.SelectNodes("//h2"));
            website.h3Tag = _h1h6TagsValidate.h1h6TagsChecker(document.DocumentNode.SelectNodes("//h3"));
            website.h4Tag = _h1h6TagsValidate.h1h6TagsChecker(document.DocumentNode.SelectNodes("//h4"));
            website.h5Tag = _h1h6TagsValidate.h1h6TagsChecker(document.DocumentNode.SelectNodes("//h5"));
            website.h6Tag = _h1h6TagsValidate.h1h6TagsChecker(document.DocumentNode.SelectNodes("//h6"));
            var topWords = _keyWordValidate.WordCounting(document.DocumentNode.InnerText);
            var topWordsSorted = _keyWordValidate.WordSorting(topWords);
            website.pageContent = topWordsSorted;
            website.altPicturesTags = _picturesAltValidate.CheckAltAttributes(document.DocumentNode.SelectNodes("//img"));
            website.facebook = _websiteContentValidate.CheckWebsideContent(websideContent,"facebook");
            website.twitter = _websiteContentValidate.CheckWebsideContent(websideContent, "twitter");
            website.instagram = _websiteContentValidate.CheckWebsideContent(websideContent, "instagram");
            website.linkedin = _websiteContentValidate.CheckWebsideContent(websideContent, "linkedin");
            website.descriptionPage = _descriptionValidate.CheckDescriptionLength(document);
            website.robots = _externalFilesValidate.CheckExternalFilesExist(url + "/robots.txt");
            website.sitemap = _externalFilesValidate.CheckExternalFilesExist(url + "/sitemap.xml");
            website.favicon = _externalFilesValidate.CheckExternalFilesExist(url + "/favicon.ico");
            website.noindex = _websiteContentValidate.CheckWebsideContent(websideContent, "noindex");
            website.canonical = _websiteContentValidate.CheckWebsideContent(websideContent, "canonical");
            website.analytics = _websiteContentValidate.CheckWebsideContent(websideContent, "googletagmanager");
            website.ssl = _sslValidate.SslCheckExist(url);

            return View("SourceView",website);
        }

        public StreamReader HTTPRequest(String url)
        {
            HttpWebRequest httpWebRequest = (HttpWebRequest)WebRequest.Create(url);
            HttpWebResponse httpWebResponse = (HttpWebResponse)httpWebRequest.GetResponse();
            StreamReader streamReader = new StreamReader(httpWebResponse.GetResponseStream());
            return streamReader;
        }

        public String PrintHTTPRequest(StreamReader streamReader)
        {
            string pageContent = "";
            while(!streamReader.EndOfStream)
            {
                pageContent += streamReader.ReadLine().ToString();
            }
            return pageContent;
        }
    }
}