using System.Threading.Tasks;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;

namespace IdentityDemo.Controllers
{

    [ApiExplorerSettings(IgnoreApi = true)]
    [Route("[controller]/[action]")]
    public class AccountController : Controller
    {
        /*
        private readonly UserManager<User> _userManager;
        private readonly SignInManager<User> _signInManager;
        private readonly ILogger _logger;

        public AccountController(
            UserManager<User> userManager,
            SignInManager<User> signInManager,
            ILogger<AccountController> logger)
        {
            _userManager = userManager;
            _signInManager = signInManager;
            _logger = logger;
        }
        /*
        [TempData]
        public string ErrorMessage { get; set; }

        [HttpGet]
        [AllowAnonymous]
        public async Task<IActionResult> Login(string returnUrl = null)
        {
            // Clear the existing external cookie to ensure a clean login process
            await HttpContext.SignOutAsync(IdentityConstants.ExternalScheme);

            ViewData["ReturnUrl"] = returnUrl;
            return View();
        }
        */

        [HttpPost]
        public ActionResult _login(string username, string password, bool rememberMe)
        {
            var result = username != null && password != null && username.Equals("acc1") && password.Equals("123"); //await _signInManager.PasswordSignInAsync(userName, password, rememberMe, lockoutOnFailure: false);
            JsonResponse response = new JsonResponse();
            response.Success = false;
            response.Message = "Username or password is invalid.";

            if (result)
            {
                var loggedUser = HttpContext.Session.GetString("username");
                if (loggedUser==null || !loggedUser.Equals(username))
                {
                    HttpContext.Session.SetString("username", username);
                    response.Success = true;
                    response.Message = "";
                }
                else
                {
                    response.Message = "User already logged";
                }
            }
            return Json(response);
        }

        public ActionResult _logout()
        {
            HttpContext.Session.Clear();
            return Json(new JsonResponse());
        }

        internal class JsonResponse
        {
            public bool Success { get; internal set; }
            public string Message { get; internal set; }
        }
        /*
        [HttpPost]
        [AllowAnonymous]
        [ValidateAntiForgeryToken]
        public async Task<IActionResult> Login(LoginViewModel model, string returnUrl = null)
        {
            ViewData["ReturnUrl"] = returnUrl;
            if (ModelState.IsValid)
            {
                // This doesn't count login failures towards account lockout
                // To enable password failures to trigger account lockout, set lockoutOnFailure: true
                var result = await _signInManager.PasswordSignInAsync(model.Email, model.Password, model.RememberMe, lockoutOnFailure: false);
                if (result.Succeeded)
                {
                    _logger.LogInformation("User logged in.");
                    return RedirectToLocal(returnUrl);
                }
                if (result.IsLockedOut)
                {
                    _logger.LogWarning("User account locked out.");
                    return RedirectToAction(nameof(Lockout));
                }
                else
                {
                    ModelState.AddModelError(string.Empty, "Invalid login attempt.");
                    return View(model);
                }
            }

            // If we got this far, something failed, redisplay form
            return View(model);
        }

        [HttpGet]
        [AllowAnonymous]
        public IActionResult Lockout()
        {
            return View();
        }

        [HttpGet]
        [AllowAnonymous]
        public IActionResult Register(string returnUrl = null)
        {
            ViewData["ReturnUrl"] = returnUrl;
            return View();
        }

        [HttpPost]
        [AllowAnonymous]
        [ValidateAntiForgeryToken]
        public async Task<IActionResult> Register(RegisterViewModel model, string returnUrl = null)
        {
            ViewData["ReturnUrl"] = returnUrl;
            if (ModelState.IsValid)
            {
                var user = new User { UserName = model.Email, Email = model.Email };
                var result = await _userManager.CreateAsync(user, model.Password);
                if (result.Succeeded)
                {
                    await _signInManager.SignInAsync(user, isPersistent: false);
                    _logger.LogInformation("User created a new account with password.");
                    return RedirectToLocal(returnUrl);
                }
                AddErrors(result);
            }

            // If we got this far, something failed, redisplay form
            return View(model);
        }

        [HttpPost]
        [ValidateAntiForgeryToken]
        public async Task<IActionResult> Logout()
        {
            await _signInManager.SignOutAsync();
            _logger.LogInformation("User logged out.");
            return RedirectToAction(nameof(HomeController.Index), "Home");
        }

        [HttpGet]
        [AllowAnonymous]
        public async Task<IActionResult> ConfirmEmail(string userId, string code)
        {
            if (userId == null || code == null)
            {
                return RedirectToAction(nameof(HomeController.Index), "Home");
            }
            var user = await _userManager.FindByIdAsync(userId);
            if (user == null)
            {
                throw new ApplicationException($"Unable to load user with ID '{userId}'.");
            }
            var result = await _userManager.ConfirmEmailAsync(user, code);
            return View(result.Succeeded ? "ConfirmEmail" : "Error");
        }

        [HttpGet]
        public IActionResult AccessDenied()
        {
            return View();
        }

        #region Helpers

        private void AddErrors(IdentityResult result)
        {
            foreach (var error in result.Errors)
            {
                ModelState.AddModelError(string.Empty, error.Description);
            }
        }

        private IActionResult RedirectToLocal(string returnUrl)
        {
            if (Url.IsLocalUrl(returnUrl))
            {
                return Redirect(returnUrl);
            }
            else
            {
                return RedirectToAction(nameof(HomeController.Index), "Home");
            }
        }

        #endregion
        */
    }
}