using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Text.RegularExpressions;
using System.Web;
using FakeHost;
using FluentAssertions;
using HtmlAgilityPack;
using NUnit.Framework;
 
namespace Pincasso.MvcApp.Tests.Integration
{
    [TestFixture, Category("Integration")]
    public class SmokeTests
    {
        [TestFixtureSetUp]
        public void SetUp()
        {
            Browser.InitializeAspNetRuntime(
                Path.GetFullPath(@"..\..\..\Pincasso.MvcApp"));
        }
 
        [Test]
        public void VisitMainPageAndLinksFromMainMenu()
        {
            using (var browser = new Browser())
            {
                // set up user (security disabled)
                browser.Cookies.Add(new HttpCookie("PincassoUser", "administrator"));
                var result = browser.Get("/");
 
                result.StatusCode
                    .Should().Be((int)HttpStatusCode.OK, "Main page failed");
 
                var menuLinks = GetMenuLinks(result.ResponseText).ToList();
 
                menuLinks.Should().NotBeEmpty("There should be some links in menu");
 
                foreach (var link in menuLinks)
                {
                    System.Diagnostics.Debug.WriteLine("Visiting: " + link);
                    result = browser.Get(link);
                    result.StatusCode
                        .Should().Be((int)HttpStatusCode.OK, "Wrong status code for page: " + link);
                    // Global filter catches all exceptions and put "user friendly" Error.cshtml instead
                    // ... which contains special maker (Yeah, I know but it works)
                    result.ResponseText
                        .Should()
                        .NotContain(
                            "<!-- error marker -->",
                            "Page {0} contains error(s)", link);
                }
            }
        }
 
        private static IEnumerable<string> GetMenuLinks(string html)
        {
            var mainPage = new HtmlDocument();
            mainPage.LoadHtml(html);
            var menuLinks =
                mainPage
                    .DocumentNode
                    .SelectNodes("//div[@class='mainmenu']//a[@href]");
 
            // Doh!, instead of empty collection it returns null!
            if (menuLinks == null)
                return Enumerable.Empty<string>();
 
            // skip empty links and special pages
            return menuLinks
                .Select(o => o.Attributes["href"].Value)
                .Where(
                    o => !string.IsNullOrWhiteSpace(o) &&
                        !Regex.IsMatch(o, @"(^#$|^\/Tools\/.*|^\/Tests\/.*)"))
                .Distinct();
        }
    }
}