﻿using System.Linq;
using System.Security.Claims;

using System;
using System.Collections.Generic;
using System.Data.Entity;
using System.Threading.Tasks;
using System.Web;

using Microsoft.AspNet.Identity;
using Microsoft.AspNet.Identity.EntityFramework;
using Microsoft.AspNet.Identity.Owin;
using Microsoft.Owin;
using Microsoft.Owin.Security;

namespace Swordfish.Web.Models
{
  // Configure the application user manager used in this application. UserManager is defined in ASP.NET Identity and is used by the application.

  public class ApplicationUserManager : UserManager<ApplicationUser>
  {
    public ApplicationUserManager(IUserStore<ApplicationUser> store)
      : base(store)
    {
    }

    public static ApplicationUserManager Create(IdentityFactoryOptions<ApplicationUserManager> options, IOwinContext context)
    {
      var manager = new ApplicationUserManager(new UserStore<ApplicationUser>(context.Get<ApplicationDbContext>()));
      // Configure validation logic for usernames
      manager.UserValidator = new UserValidator<ApplicationUser>(manager) {
        AllowOnlyAlphanumericUserNames = false,
        RequireUniqueEmail = true
      };
      // Configure validation logic for passwords
      manager.PasswordValidator = new PasswordValidator {
        RequiredLength = 6,
        RequireNonLetterOrDigit = false,
        RequireDigit = true,
        RequireLowercase = true,
        RequireUppercase = false,
      };
      // Configure user lockout defaults
      manager.UserLockoutEnabledByDefault = true;
      manager.DefaultAccountLockoutTimeSpan = TimeSpan.FromMinutes(5);
      manager.MaxFailedAccessAttemptsBeforeLockout = 5;
      // Register two factor authentication providers. This application uses Phone and Emails as a step of receiving a code for verifying the user
      // You can write your own provider and plug in here.
      manager.RegisterTwoFactorProvider("PhoneCode", new PhoneNumberTokenProvider<ApplicationUser> {
        MessageFormat = "Your security code is: {0}"
      });
      manager.RegisterTwoFactorProvider("EmailCode", new EmailTokenProvider<ApplicationUser> {
        Subject = "SecurityCode",
        BodyFormat = "Your security code is {0}"
      });
      manager.EmailService = new EmailService();
      manager.SmsService = new SmsService();
      var dataProtectionProvider = options.DataProtectionProvider;
      if ( dataProtectionProvider != null )
      {
        manager.UserTokenProvider =
            new DataProtectorTokenProvider<ApplicationUser>(dataProtectionProvider.Create("ASP.NET Identity"));
      }
      return manager;
    }
  }

  // Configure the RoleManager used in the application. RoleManager is defined in the ASP.NET Identity core assembly
  public class ApplicationRoleManager : RoleManager<IdentityRole>
  {
    public ApplicationRoleManager(IRoleStore<IdentityRole, string> roleStore)
      : base(roleStore)
    {
    }

    public static ApplicationRoleManager Create(IdentityFactoryOptions<ApplicationRoleManager> options, IOwinContext context)
    {
      return new ApplicationRoleManager(new RoleStore<IdentityRole>(context.Get<ApplicationDbContext>()));
    }
  }

  public class EmailService : IIdentityMessageService
  {
    public Task SendAsync(IdentityMessage message)
    {
      // Plug in your email service here to send an email.
      return Task.FromResult(0);
    }
  }

  public class SmsService : IIdentityMessageService
  {
    public Task SendAsync(IdentityMessage message)
    {
      // Plug in your sms service here to send a text message.
      return Task.FromResult(0);
    }
  }

  // This is useful if you do not want to tear down the database each time you run the application.
  // public class ApplicationDbInitializer : DropCreateDatabaseAlways<ApplicationDbContext>
  // This example shows you how to create a new database if the Model changes
  public class ApplicationDbInitializer : DropCreateDatabaseIfModelChanges<ApplicationDbContext>
  {
    protected override void Seed(ApplicationDbContext context)
    {
      InitializeIdentityForEF(context);
      base.Seed(context);
    }

    //Create User=Admin@Admin.com with password=Admin@123456 in the Admin role        
    public static void InitializeIdentityForEF(ApplicationDbContext db)
    {
      var userManager = HttpContext.Current.GetOwinContext().GetUserManager<ApplicationUserManager>();
      var roleManager = HttpContext.Current.GetOwinContext().Get<ApplicationRoleManager>();
      const string name = "admin@example.com";
      const string password = "mojito3x";
      const string roleName = "Admin";

      //Create Role Admin if it does not exist
      var role = roleManager.FindByName(roleName);
      if ( role == null )
      {
        role = new IdentityRole(roleName);
        var roleresult = roleManager.Create(role);
      }

      var user = userManager.FindByName(name);
      if ( user == null )
      {
        user = new ApplicationUser { UserName = name, Email = name };
        var result = userManager.Create(user, password);
        result = userManager.SetLockoutEnabled(user.Id, false);
      }

      // Add user admin to Role Admin if not already added
      var rolesForUser = userManager.GetRoles(user.Id);
      if ( !rolesForUser.Contains(role.Name) )
      {
        var result = userManager.AddToRole(user.Id, role.Name);
      }
    }
  }

  public class ApplicationSignInManager : SignInManager<ApplicationUser, string>
  {
    public ApplicationSignInManager(ApplicationUserManager userManager, IAuthenticationManager authenticationManager) :
      base(userManager, authenticationManager) { }

    public override Task<ClaimsIdentity> CreateUserIdentityAsync(ApplicationUser user)
    {
      return user.GenerateUserIdentityAsync(( ApplicationUserManager ) UserManager);
    }

    public static ApplicationSignInManager Create(IdentityFactoryOptions<ApplicationSignInManager> options, IOwinContext context)
    {
      return new ApplicationSignInManager(context.GetUserManager<ApplicationUserManager>(), context.Authentication);
    }
  }
}