using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using System.Web.Routing;
using System.Web.UI;
using AutoMapper;
using DR.FV2016.Service.Interfaces;
using DR.FV2016.Service.Models;
using DR.FV2016.Web.Helpers;
using DR.FV2016.Web.Models.Candidate;
using DR.FV2016.Web.Models.CandidateList;

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

        private readonly ICompositeCandidateService _compositeCandidateService;
        private readonly IPartyService _partyService;
        private readonly IArticleService _articleService;

        public CandidateListController(ICompositeCandidateService compositeCandidateService, IPartyService partyService, IArticleService articleService)
        {
            if (compositeCandidateService == null) { throw new ArgumentNullException("compositeCandidateService"); }
            if (partyService == null) { throw new ArgumentNullException("partyService"); }
            if (articleService == null) { throw new ArgumentException("articleService"); }

            _compositeCandidateService = compositeCandidateService;
            _partyService = partyService;
            _articleService = articleService;
        }

        [OutputCache(Location = OutputCacheLocation.Downstream, Duration = 180)]
        public ActionResult Index(string constituencySlug)
        {
            if (string.IsNullOrEmpty(constituencySlug))
                throw new ArgumentNullException("constituencySlug", "constituencySlug cannot be null or empty!!!");

            var viewModel = Mapper.Map<CandidateListViewModel>(_articleService.GetWebCmsArticle("/se-din-stemmeseddel"));

            viewModel.CanonicalLink += "/" + constituencySlug;

            var parties = Mapper.Map<IEnumerable<Party>>(_partyService.GetParties().OrderBy(p => p.Letter)).ToList();

            //Find out if outside parties party is in list index 0 and move to end
            int n;
            var orderedParties = new List<Party>();
            if (int.TryParse(parties[0].Letter, out n))
            {
                var outsideParties = parties[0];
                parties.RemoveAt(0);
                orderedParties = parties.OrderBy(p => p.Letter).ToList();
                orderedParties.Add(outsideParties);
            }

            try
            {
                foreach (var party in orderedParties)
                {
                    var mappedParty = Mapper.Map<CandidateArticleList>(party);
                    mappedParty.Items = Mapper.Map<List<CandidateArticleListItem>>(_compositeCandidateService.GetCandidatesByConstituency(constituencySlug, party.Id));
                    if (!mappedParty.Items.Any())
                        continue;
                    viewModel.PartiesWithCandidates.Add(mappedParty);
                }

                viewModel.IsResponsive = true;

                SearchableHelper.EnsureUrn(viewModel, "urn:dr:valg2015:se-din-stemmeseddel:" + constituencySlug);
                viewModel.CanonicalLink = string.Format("http://www.dr.dk{0}/{1}/{2}", HttpRuntime.AppDomainAppVirtualPath,((Route) (RouteTable.Routes["Se din stemmeseddel"])).Url, constituencySlug);

                return View(viewModel);
            }
            catch (KeyNotFoundException)
            {
                return new HttpNotFoundResult();
            }
        }       
    }
}