using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Web;
using System.Web.Mvc;
using System.Web.Routing;
using System.Web.UI;
using DR.FV2016.Service.Interfaces;
using DR.FV2016.Web.Models.Sitemap;
using Newtonsoft.Json;

namespace DR.FV2016.Web.Controllers
{
    public class SitemapController : Controller
    {

        private readonly ICompositeCandidateService _compositeCandidateService;
        private readonly RouteCollection _routes;
        private readonly DateTime _createdDate;
        private readonly string _virtualPath;

        public SitemapController(ICompositeCandidateService compositeCandidateService)
        {
            _compositeCandidateService = compositeCandidateService;
            _routes = RouteTable.Routes;
            //As we don't have a (proper) creation dates for our pages we need to fake one
            _createdDate = new DateTime(2010, 1, 1);
            _virtualPath = HttpRuntime.AppDomainAppVirtualPath;

        }

        // GET: Sitemap
        [OutputCache(Location = OutputCacheLocation.Downstream, Duration = 600)]
        public ActionResult Index(int page, int size, DateTime? startdate, DateTime? endDate)
        {
            var offset = (page - 1) * size; 

            if (!startdate.HasValue)
                startdate = DateTime.MinValue;

            if (!endDate.HasValue)
                endDate = DateTime.MaxValue;

            var pages = MainPages().ToList();

            //Only add candiate pages if necessary
            if (pages.Count() < (offset + size))
                pages.AddRange(CandidateProfiles(startdate.Value, endDate.Value));

            pages = pages.Skip(offset).Take(size).ToList();
            return Content(JsonConvert.SerializeObject(pages), "application/json", Encoding.UTF8);
        }

        private IEnumerable<SitemapItem> MainPages()
        {
            var mainPages = new List<SitemapItem>();

            //Forside
            mainPages.Add(new SitemapItem
            {
                Name = "FV forside | Valg 2015 | DR",
                Url = string.Format("{0}", _virtualPath),
                Created = _createdDate.ToString("o"),
                Modified = DateTime.Now.ToString("o")
            });

            //Live side
            mainPages.Add(new SitemapItem
            {
                Name = "Live | Valg 2015 | DR",
                Url = string.Format("{0}/live", _virtualPath),
                Created = _createdDate.ToString("o"),
                Modified = DateTime.Now.ToString("o")
            });

            //Kandidat testen
            mainPages.Add(new SitemapItem
            {
                Name = "Kandidat-testen | Valg 2015 | DR",
                Url = string.Format("{0}/{1}", _virtualPath, ((Route)(_routes["Match"])).Url), 
                Created = _createdDate.ToString("o"),
                Modified = DateTime.Now.ToString("o")
            });

            //Se din stemmeseddel
            mainPages.Add(new SitemapItem
            {
                Name = "Se din stemmeseddel | Valg 2015 | DR",
                Url = string.Format("{0}/{1}", _virtualPath, ((Route)(_routes["Se din stemmeseddel"])).Url),
                Created = _createdDate.ToString("o"),
                Modified = DateTime.Now.ToString("o")
            });

            //Min regering
            mainPages.Add(new SitemapItem
            {
                Name = "Min regering | Valg 2015 | DR",
                Url = string.Format("{0}/{1}", _virtualPath, ((Route)(_routes["Min-regering"])).Url),
                Created = _createdDate.ToString("o"),
                Modified = DateTime.Now.ToString("o")
            });

            //Meningsmaalinger
            mainPages.Add(new SitemapItem
            {
                Name = "Meningsmålinger | Valg 2015 | DR",
                Url = string.Format("{0}/{1}", _virtualPath, ((Route)(_routes["Meningsmaaling"])).Url),
                Created = _createdDate.ToString("o"),
                Modified = DateTime.Now.ToString("o")
            });

            //Vælgervandringer
            mainPages.Add(new SitemapItem
            {
                Name = "Vælgervandringer | Valg 2015 | DR",
                Url = string.Format("{0}/{1}", _virtualPath, ((Route)(_routes["Vaelgervandringer"])).Url),
                Created = _createdDate.ToString("o"),
                Modified = DateTime.Now.ToString("o")
            });


            //Resultattilmelding
            mainPages.Add(new SitemapItem
            {
                Name = "Resultattilmelding | Valg 2015 | DR",
                Url = string.Format("{0}/{1}", _virtualPath, ((Route)(_routes["ResultNotification"])).Url),
                Created = _createdDate.ToString("o"),
                Modified = DateTime.Now.ToString("o")
            });

            //Plakatgenerator
            mainPages.Add(new SitemapItem
            {
                Name = "Plakatgenerator | Valg 2015 | DR",
                Url = string.Format("{0}/{1}", _virtualPath, ((Route)(_routes["Plakatgenerator"])).Url),
                Created = _createdDate.ToString("o"),
                Modified = DateTime.Now.ToString("o")
            });



            return mainPages;
        }
        
        private IEnumerable<SitemapItem> CandidateProfiles(DateTime startDate, DateTime endDate)
        {
            
            if (endDate < _createdDate)
                return new List<SitemapItem>();

            var candidates = _compositeCandidateService.GetCandidates().GroupBy(c => c.Id).Select(g => g.FirstOrDefault());

            if (_createdDate <= startDate)
            {
                candidates = candidates.Where(c => c.LastModified >= startDate && c.LastModified < endDate);
            }

            return candidates.Select(candidate => new SitemapItem
            {
                Name = string.Format("{0} | {1} | Valg 2015 | DR", candidate.Name, candidate.Party.Name),
                Url = string.Format("{0}/{1}", _virtualPath, ((Route)(_routes["Candidate"])).Url.Replace("{name}", candidate.Name).Replace("{id}", candidate.Id.ToString())), 
                Created = _createdDate.ToString("o"), 
                Modified = candidate.LastModified.ToString("o"),
            });

        }



        

    }


}