using EFB.Controllers.API;
using EFB.Models;
using EFB.Models.JSON;
using EFB.Sessions;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Logging;
using System;
using System.Collections.Generic;
using System.Net.Http;
using System.Threading.Tasks;

namespace EFB.Controllers
{
    //[Route("[controller]")]
    public class UserController : Controller
    {
        private readonly ILogger<UserController> _logger;

        public UserController(ILogger<UserController> logger)
        {
            _logger = logger;
        }

        public IActionResult Index()
        {   
            return View();
        }

        public async Task<IActionResult> Login(string email, string password)
        {
            //Ensure that the user is not already logged in
            UserModel user = HttpContext.Session.GetObject<UserModel>("User");
            if (user != null) return RedirectToAction("Index", "App");

            if (!Form.FormAuthenticator.ValidateEMail(email))
            {
                TempData["Error"] = "Please enter a valid E-Mail";
                return RedirectToAction("Index", "Home");
            }

            //API Helper
            APIInterface API = new APIInterface();

            //Dictionary of Formdata to be encoded
            Dictionary<string, string> formData = new Dictionary<string, string>();

            formData.Add("grant_type", "client_credentials");
            formData.Add("client_id", email);
            formData.Add("client_secret", password);

            HttpContent content = new FormUrlEncodedContent(formData);

            var request = API.Post<Models.JSON.LoginResponse>("https://api.autorouter.aero/v1.0/oauth2/token", null, content);

            //Wait for the response to come through
            ResponseModel<LoginResponse> response = await request;

            if (response.Error != null)
            {
                TempData["Error"] = response.Error;
                TempData["email"] = email;
                return RedirectToAction("Index", "Home");
            }
            //Type cast required but we know response will be of known type
            LoginResponse login = response.Result;

            //Generate User Session
            if (login.error != null)
            {
                TempData["Error"] = login.error_description;
                TempData["email"] = email;
                return RedirectToAction("Index", "Home");
            }

            user = new UserModel
            {
                EMail = email,
                UserToken = new TokenModel
                {
                    TokenValue = login.access_token,
                    Expiration = DateTime.UtcNow.AddSeconds(login.expires_in)
                }
            };

            //Using Session Extensions (Store the user session)
            HttpContext.Session.SetObject("User", user);
            return RedirectToAction("Index", "App");
        }

        public IActionResult Logout()
        {
            HttpContext.Session.SetObject("User", null);
            return RedirectToAction("Index", "Home");
        }

        [ResponseCache(Duration = 0, Location = ResponseCacheLocation.None, NoStore = true)]
        public IActionResult Error()
        {
            return View("Error!");
        }
    }
}