using System;
using System.Web.Mvc;
using System.Web.Routing;
using System.Web.Security;
using AltNetHispano.Agendas.Domain;
using AltNetHispano.Agendas.Factories;
using AltNetHispano.Agendas.Twitter;
using AltNetHispano.Agendas.Web.Models;
using AltNetHispano.Agendas.Web.Services;

namespace AltNetHispano.Agendas.Web.Controllers
{
    public class AccountController : Controller
    {

        public IFormsAuthenticationService FormsService { get; set; }
        public IMembershipService MembershipService { get; set; }

        protected override void Initialize(RequestContext requestContext)
        {
            if (FormsService == null) { FormsService = new FormsAuthenticationService(); }
            if (MembershipService == null) { MembershipService = new AccountMembershipService(); }

            base.Initialize(requestContext);
        }

        // **************************************
        // URL: /Account/LogOn
        // **************************************

        public ActionResult LogOn()
        {
            return View();
        }

        [HttpPost]
        public ActionResult LogOn(LogOnModel model, string returnUrl)
        {
            if (ModelState.IsValid)
            {
				if (MembershipService.ValidateUser(model.UserName, model.Password))
				{
					var personaService = AgendaFactory.GetPersonaService();
					if (personaService.Validate(IdentityProviderEnum.BuiltIn, model.UserName))
					{
						FormsService.SignIn(Identification.Map[(int)IdentityProviderEnum.BuiltIn] + model.UserName, model.RememberMe);
						if (Url.IsLocalUrl(returnUrl))
							return Redirect(returnUrl);
						return RedirectToAction("Index", "Home");
					}
				}
            	ModelState.AddModelError("", "The user name or password provided is incorrect.");
            }

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

		public ActionResult TwitterLogOn()
		{
			var oAuth = new OAuthTwitter();

			if (Request["oauth_token"] == null)
			{
				var action = Url.Action("TwitterLogOn");
				var url = Request.Url.Scheme + "://" + Request.Url.Host +
				          (Request.Url.Port != 80 ? ":" + Request.Url.Port : string.Empty) + action;

				Response.Redirect(oAuth.AuthorizationLinkGet(url).ToString());
			}
			else
			{
				var response = oAuth.AccessTokenGet(Request["oauth_token"], Request["oauth_verifier"]);
				if (response.Length > 0)
				{
					var username = GetResponseContent(response, "screen_name");
					var nombre = GetResponseContent(response, "name");

					var personaService = AgendaFactory.GetPersonaService();
					if (personaService.Validate(IdentityProviderEnum.Twitter, username, nombre))
					{
						FormsService.SignIn(Identification.Map[(int)IdentityProviderEnum.Twitter]+username, false);
						return RedirectToAction("Index", "Home");
					}
					ModelState.AddModelError("", "The user name or password provided is incorrect.");
				}
			}

			return RedirectToAction("LogOn");
		}

		private static string GetResponseContent(string response, string tagName)
		{
			var tagStart = "\"" + tagName + "\":";
			var tagEnd = ",";

			var start = response.IndexOf(tagStart) + tagStart.Length;
			if (start > tagStart.Length)
			{
				var end = response.IndexOf(tagEnd, start);
				if (end > 0)
				{
					return response.Substring(start + 1, end - start - 2);
				}
			}
			return string.Empty;
		}

    	// **************************************
        // URL: /Account/LogOff
        // **************************************

        public ActionResult LogOff()
        {
            FormsService.SignOut();

            return RedirectToAction("Index", "Home");
        }

        // **************************************
        // URL: /Account/Register
        // **************************************

        public ActionResult Register()
        {
            ViewBag.PasswordLength = MembershipService.MinPasswordLength;
            return View();
        }

        [HttpPost]
        public ActionResult Register(RegisterModel model)
        {
            if (ModelState.IsValid)
            {
                // Attempt to register the user
                MembershipCreateStatus createStatus = MembershipService.CreateUser(model.UserName, model.Password, model.Email);

                if (createStatus == MembershipCreateStatus.Success)
                {
					var personaService = AgendaFactory.GetPersonaService();
					if (personaService.Validate(IdentityProviderEnum.BuiltIn, model.UserName, model.Nombre))
					{
						FormsService.SignIn(Identification.Map[(int)IdentityProviderEnum.BuiltIn] + model.UserName, false);
						return RedirectToAction("Index", "Home");
					}
                }
                ModelState.AddModelError("", AccountValidation.ErrorCodeToString(createStatus));
            }

            // If we got this far, something failed, redisplay form
            ViewBag.PasswordLength = MembershipService.MinPasswordLength;
            return View(model);
        }

        // **************************************
        // URL: /Account/ChangePassword
        // **************************************

        [Authorize]
        public ActionResult ChangePassword()
        {
            ViewBag.PasswordLength = MembershipService.MinPasswordLength;
            return View();
        }

        [Authorize]
        [HttpPost]
        public ActionResult ChangePassword(ChangePasswordModel model)
        {
            if (ModelState.IsValid)
            {
                if (MembershipService.ChangePassword(User.Identity.Name, model.OldPassword, model.NewPassword))
                {
                    return RedirectToAction("ChangePasswordSuccess");
                }
                else
                {
                    ModelState.AddModelError("", "The current password is incorrect or the new password is invalid.");
                }
            }

            // If we got this far, something failed, redisplay form
            ViewBag.PasswordLength = MembershipService.MinPasswordLength;
            return View(model);
        }

        // **************************************
        // URL: /Account/ChangePasswordSuccess
        // **************************************

        public ActionResult ChangePasswordSuccess()
        {
            return View();
        }

    }
}