using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;

using Domain.Entities;
using Domain.Repositories;
using FilmsRUsOnline.Models;

namespace FilmsRUsOnline.Controllers
{
    public class FilmsController : Controller
    {
        // The controller needs a films repository to access films.
        private IFilmsRepository filmsRepository;

        // Number of films to display on each page.
        public int PageSize = 3;


        // Constructor - approach #1, creates a repository manually.
        public FilmsController()
        {
            // Either use the dummy repository...
            filmsRepository = new DummyFilmsRepository();

            // Or use the database-connected repository.
            //   string connStr = @"Server=.\SQLEXPRESS;Database=FilmsRUs;Trusted_Connection=yes;";
            //   filmsRepository = new SqlFilmsRepository(connStr);
        }


        // Constructor - approach #2, gets given a repository by Dependency Injection (DI).
        public FilmsController(IFilmsRepository filmsRepository)
        {
            this.filmsRepository = filmsRepository;
        }


        // Action method to list films (simple implementation).
        /*
        public ViewResult List()
        {
            return View(filmsRepository.Films);
        }
        */

        // Action method to list a page of films (page-by-page).
        // Note the default value for the pageNumber - this is a C# 4 language feature.
        // If you're using C# 3.x, do this instead:  [DefaultValue(1)]int pageNumber
        public ViewResult List(int pageNumber = 1)
        {
            var filmsToShow = filmsRepository.Films;

            FilmsViewModel vm = new FilmsViewModel()
            {
                Films = filmsToShow.Skip((pageNumber - 1) * PageSize)
                                        .Take(PageSize)
                                        .ToList(),

                PaginationInfo = new PaginationInfo
                {
                    CurrPage = pageNumber,
                    ItemsPerPage = PageSize,
                    NumItems = filmsToShow.Count()
                }
            };

            return View(vm);
        }
    }
}