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

using Domain.Repositories;
using Domain.Entities;

using FilmsRUsOnline.Models;

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


        // Constructor, gets given a repository by Dependency Injection (DI).
        public OrderController(IFilmsRepository filmsRepository)
        {
            this.filmsRepository = filmsRepository;
        }


        public RedirectToRouteResult AddToOrder(Order order, int filmID, string returnUrl)
        {
            Film film = filmsRepository.Films.FirstOrDefault(x => x.FilmID == filmID);
            order.AddItem(film, 1);

            return RedirectToAction("Index", new { returnUrl });
        }


        public RedirectToRouteResult RemoveFromOrder(Order order, int filmID, string returnUrl)
        {
            Film film = filmsRepository.Films
                                       .FirstOrDefault(x => x.FilmID == filmID);
            order.RemoveItem(film);

            return RedirectToAction("Index", new { returnUrl });
        }


        public ViewResult Index(Order order, string returnUrl)
        {
            return View(new OrderIndexViewModel
            {
                Order = order,
                ReturnUrl = returnUrl
            });
        }


        public ViewResult Summary(Order order)
        {
            return View("_Summary", order);
        }


        // First request for the Checkout page (i.e. HTTP GET), so just display empty form.
        [HttpGet]
        public ViewResult Checkout()
        {
            return View(new DeliveryDetails());
        }


        // Subsequent request for the Checkout page (i.e. HTTP POST), 
        // i.e. user has posted back data. Do go to Done page (maybe...).
        [HttpPost]
        public ActionResult Checkout(Order order, DeliveryDetails deliveryDetails)
        {
            // Empty orders can't be checked out.
            if (order.Items.Count == 0)
                ModelState.AddModelError("Order", "Dude, you ain't ordered any films yet!");

            if (ModelState.IsValid)
            {
                return View("Done", order);
            }
            else
            {
                return View(deliveryDetails);
            }
        }
    }
}