using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using IMDB_Data.DataContext;
using IMDB_Web.Areas.StandardUser.Models;
using IMDB_Web.Areas.StandardUser.Repository;
using IMDB_Web.HELPER;
using Microsoft.AspNetCore.Hosting.Internal;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;

namespace IMDB_Web.Areas.StandardUser.Controllers
{
    public class TestController : Controller
    {
        private readonly MyAppDbContext _context;
        private readonly IMovies _movies;
        public const int RecordsPerPage = 10;

        public TestController(MyAppDbContext context,
            IMovies movies)
        {
            _context = context;
            _movies = movies;
            ViewBag.RecordsPerPage = RecordsPerPage;
        }


        public IActionResult Index(int? pageNum)
        {
            pageNum = pageNum ?? 0;
            ViewBag.IsEndOfRecords = false;
            if (Request.IsAjaxRequest())
            {
                var moviesShows = GetRecordsForPage(pageNum.Value);
                ViewBag.IsEndOfRecords =
                    (moviesShows.Any()) && ((pageNum.Value * RecordsPerPage) >= moviesShows.Last().Key);
                return PartialView("_moviesShowsRow", moviesShows);
            }
            else
            {
            LoadAllToSession();
                ViewBag.moviesShows = GetRecordsForPage(pageNum.Value);
                return View("IndexTest");
            }
            return View();
        }
        public void LoadAllToSession()
        {
            var movies = _context.Movies.Where(q => q.IsShow == false).Select(x => new MoviesShowsListViewModel.Row
            {
                MovieId = x.MovieId,
                Title = x.Title,
                Duration = x.Duration,
                ReleaseDate = x.ReleaseDate.ToShortDateString(),
                Description = x.Description,
                Image = x.CoverImage,
                AvgRating = _context.MoviesRatingses
                    .Include(a => a.Rating)
                    .Where(a => a.MovieId == x.MovieId)
                    .Average(a => a.Rating.Score)
            }).OrderByDescending(a => a.AvgRating).ToList();

            int mIndex = 1;
            HttpContext.Session.Set("MoviesShows", movies.ToDictionary(x => mIndex++, x => x));
           ViewBag.TotalNumberMoviesShows = movies.Count();
        }
        public Dictionary<int, MoviesShowsListViewModel> GetRecordsForPage(int pageNum)
        {
            var model = HttpContext.Session.Get<MoviesShowsListViewModel>
                ("MoviesShows").Rows.ToList();
            /*
            Dictionary<int, MoviesShowsListViewModel> movies
                = model as Dictionary<int, MoviesShowsListViewModel>);
                */

            int from = (pageNum * RecordsPerPage);
            int to = from + RecordsPerPage;
            return movies
                .Where(x => x.Key > from && x.Key <= to)
                .OrderBy(x => x.Key)
                .ToDictionary(x => x.Key, x => x.Value);
        }
    }
}