using System;
using System.Linq;
using System.Web.Mvc;
using System.Web.Security;
using MileageTraker.Web.Attributes;
using MileageTraker.Web.Models;
using MileageTraker.Web.ViewModels.User;

namespace MileageTraker.Web.Controllers
{
	[Authorize(Roles = "Administrator, Developer")]
	[UserActivity]
    public class UserController : ControllerBase
    {
        public ActionResult Index()
        {
            return View(DataService.GetUsers().ToList());
        }

        public ActionResult Details(Guid id)
        {
	        var user = Membership.GetUser(id);
            if (user == null)
            {
                return HttpNotFound();
            }
			return View(DataService.GetUser(id));
        }

        public ActionResult Create()
        {
	        var vm = new CreateUserViewModel
		        {
			        AvailableRoles = Roles.GetAllRoles()
		        };

	        return View(vm);
        }

        [HttpPost]
		public ActionResult Create(CreateUserViewModel viewModel)
        {
            if (ModelState.IsValid)
            {
	            var hasRoles = viewModel.Roles != null && viewModel.Roles.Any();

	            MembershipCreateStatus membershipCreateStatus;
	            var membershipUser = 
					Membership.CreateUser(
						viewModel.Username, 
						viewModel.Password, 
						viewModel.Email,
						null,
						null,
						hasRoles,
						out membershipCreateStatus);

	            if (membershipUser == null)
	            {
		            ModelState.AddModelError("", ErrorCodeToString(membershipCreateStatus));
		            viewModel.AvailableRoles = Roles.GetAllRoles();
					return View(viewModel);
	            }

	            if (hasRoles)
				{
					Roles.AddUserToRoles(
						membershipUser.UserName,
						viewModel.Roles);
				}

	            var user = DataService.GetUser(
					(Guid) membershipUser.ProviderUserKey);
	            user.FullName = viewModel.FullName;
				DataService.UpdateUserPersonalInfo(user);

	            return RedirectToAction("Index");
            }

			viewModel.AvailableRoles = Roles.GetAllRoles();
			return View(viewModel);
        }

        public ActionResult Edit(Guid id)
        {
            var user = DataService.GetUser(id);
            if (user == null)
            {
                return HttpNotFound();
            }
            return View(user);
        }

        [HttpPost]
        public ActionResult Edit(User user)
        {
            if (ModelState.IsValid)
            {
                DataService.UpdateUser(user);
                return RedirectToAction("Index");
            }
            return View(user);
        }

		private static string ErrorCodeToString(MembershipCreateStatus createStatus)
		{
			// See http://go.microsoft.com/fwlink/?LinkID=177550 for
			// a full list of status codes.
			switch (createStatus)
			{
				case MembershipCreateStatus.DuplicateUserName:
					return "User name already exists. Please enter a different user name.";

				case MembershipCreateStatus.DuplicateEmail:
					return "A user name for that e-mail address already exists. Please enter a different e-mail address.";

				case MembershipCreateStatus.InvalidPassword:
					return "The password provided is invalid. Please enter a valid password value.";

				case MembershipCreateStatus.InvalidEmail:
					return "The e-mail address provided is invalid. Please check the value and try again.";

				case MembershipCreateStatus.InvalidAnswer:
					return "The password retrieval answer provided is invalid. Please check the value and try again.";

				case MembershipCreateStatus.InvalidQuestion:
					return "The password retrieval question provided is invalid. Please check the value and try again.";

				case MembershipCreateStatus.InvalidUserName:
					return "The user name provided is invalid. Please check the value and try again.";

				case MembershipCreateStatus.ProviderError:
					return "The authentication provider returned an error. Please verify your entry and try again. If the problem persists, please contact your system administrator.";

				case MembershipCreateStatus.UserRejected:
					return "The user creation request has been canceled. Please verify your entry and try again. If the problem persists, please contact your system administrator.";

				default:
					return "An unknown error occurred. Please verify your entry and try again. If the problem persists, please contact your system administrator.";
			}
		}
    }
}